ActionEvent.getActionCommand() not found
Folks,
I downloaded the Sun Java System Application Server Platform Edition 8.0 (build b57-fcs). I am trying out to implement a sample ActionListener.
The compiler is complaining "method getActionCommand() not defined in ActionEvent".
I have the jsf-api.jar as well as jsf-impl.jar in the build.xml for the classpath.
I also extracted these jar files and ran javap on the ActionEvent.class, to my surprise there is no public method by name getActionCommand().
Has anybody encountered such problem? Am I missing anything?
Any help is appreciated.
Thanks
Sri
hi, try it via JSF 1.1
http://java.sun.com/j2ee/javaserverfaces/1.1/docs/api/javax/faces/event/ActionEvent.html
cheers
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Method not found:Next.execute(javax.faces.event.ActionEvent)ADF11.1.1
Hi ,
I created simple app in ADF11g production version.this is working fine in Jdev IDE.
In my application two pages are there.in first page just ADF ROF is there.there youcan see the rows in a dept table thru navigation contrlos.and a submit button to navigate to next page.in second page ,i have createinsert button,delete,commit,rollback buttons.and abutton to navigate to first page.
I deployed the EAR successfully to Extervnal WLS10.3while testing it from Browser,
First i got first row in my table along with Navigation contrlos and submit button of first page in the browser.when i am clicking on next button(to move to next row) it is giving the following error in information box.
Method not found: Next.execute(javax.faces.event.ActionEvent).
And the WLS server domain error log is:
Oct 31, 2008 10:00:09 AM EDT netuix Warning BEA-423420 Redirect is executed in begin or refresh action. Redirect url is /console/console.portal?_nfpb=true&_pageLabel=DiagnosticsViewDomainLogTablePage&DiagnosticsViewDomainLogTablePortlethandle=com.bea.console.handles.LogDispatchHandle%28%22AdminServer%3BDomainLog%22%29.
Oct 31, 2008 10:00:41 AM EDT oracle.adfinternal.controller.faces.lifecycle.JSFLifecycleImpl Warning ADFC-54008 ADFc: Replacing the ADF Page Lifecycle implementation with 'oracle.adfinternal.controller.application.model.JSFDataBindingLifecycleContextBuilder'.
Oct 31, 2008 10:00:44 AM EDT HTTP Error BEA-101017 [weblogic.servlet.internal.WebAppServletContext@2767c8 - appName: 'sailu', name: 'department_Application-viewcontroller-context-root', context-path: '/department_Application-viewcontroller-context-root', spec-version: '2.5', request: weblogic.servlet.internal.ServletRequestImpl@1f9449a[ GET /department_Application-viewcontroller-context-root/faces/Depvue1.jspx HTTP/1.1 User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.8.1.17) Gecko/20080829 Firefox/2.0.0.17 Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5 Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 300 Connection: keep-alive Cookie: ADMINCONSOLESESSION=G65pJLNKGrn9cqWKT2MYJNQThDyGwPhbTyhYv6G0JWf5GpbTyWB2!590494889 ]] Root cause of ServletException. java.lang.IllegalStateException: Cannot forward a response that is already committed at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:122) at com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:415) at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44) at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44) at org.apache.myfaces.trinidad.context.ExternalContextDecorator.dispatch(ExternalContextDecorator.java:44) at org.apache.myfaces.trinidadinternal.context.FacesContextFactoryImpl$OverrideDispatch.dispatch(FacesContextFactoryImpl.java:267) at com.sun.faces.application.ViewHandlerImpl.executePageToBuildView(ViewHandlerImpl.java:475) at com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:143) at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:189) at org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:188) at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._renderResponse(LifecycleImpl.java:652) at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:243) at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:203) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:278) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:238) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:195) at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:138) at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at oracle.security.jps.wls.JpsWlsFilter.doFilter(JpsWlsFilter.java:102) at oracle.security.jps.ee.http.JpsFilter.doFilter(JpsFilter.java:65) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:27) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3496) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(Unknown Source) at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180) at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086) at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406) at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201) at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
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Oct 31, 2008 10:00:46 AM EDT oracle.adf.share.jndi.ReferenceStoreHelper Warning BEA-000000 Incomplete connection information
Oct 31, 2008 10:00:52 AM EDT oracle.adfinternal.view.faces.config.rich.RegistrationConfigurator Error BEA-000000 Server Exception during PPR, #1 javax.servlet.ServletException: Method not found: Next.execute(javax.faces.event.ActionEvent) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:270) at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227) at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125) at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292) at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:26) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at oracle.adf.model.servlet.ADFBindingFilter.doFilter(ADFBindingFilter.java:181) at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:42) at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:85) at 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Oct 31, 2008 10:01:32 AM EDT netuix Warning BEA-423420 Redirect is executed in begin or refresh action. Redirect url is /console/console.portal?_nfpb=true&_pageLabel=DiagnosticsViewDomainLogTablePage&DiagnosticsViewDomainLogTablePortlethandle=com.bea.console.handles.LogDispatchHandle%28%22AdminServer%3BDomainLog%22%29.
And in this page when i am clicking on submit button to navigate to second page,it is not going to second page .it is in first page only.
Can you tell me about this error and any changes to do for my code to get run my app on browser.
I appreciate your help and time.Hi Frank,
now my problem solved .just i created one more application newly and deployed it on External WLS.
Now i am able to see all the rows in my DEPT table in my first page of app thru navigation contrlos.
In the same way i am able to see all rows in second page also.and also able to edit the rows thru commit,delete buttons.and able to insert the rows also in second page.
But the submit button to go from page1 to page2 is not working.and also the submit button from page 2 to page1 not working.
I am giving the following in my URL:
http://localhost:7001/Dep1wlsApplication1-ViewController-context-root/faces/view1.jspx
http://localhost:7001/Dep1wlsApplication1-ViewController-context-root/faces/view2.jspx
What i have to do in order to go from first page to second and second to first.in my IDE i am able to go.
Is anything i have to change in my URL>
Plz suggest me. -
JDev 9.04 ActionListener Not Found Errror
I created a Java class in JDev 9.0.4.13.8 running Java version 1.4.2_03 on WinXP. When I attempt to rebuild it, I get "Error(9,52): class ActionListener not found in class testclient.TestClient. I am trying to create an application to upload a user-selected file to a servlet. Below is the code:
package testclient;
import java.awt.*;
import java.awt.Event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
public class TestClient extends JFrame implements ActionListener
JTextField t1;
static String pathURL;
public TestClient()
getContentPane().add(getUploadPanel());
setSize(400,175);
show();
JPanel getUploadPanel()
JPanel jpanel=new JPanel();
jpanel.setLayout(null);
JLabel l1=new JLabel("Select the File to upload : ");
t1=new JTextField(20);
JButton b1=new JButton("...");
b1.setActionCommand("b1");
JButton upload=new JButton("Upload");
upload.setActionCommand("Upload");
JButton cancel=new JButton("Cancel");
cancel.setActionCommand("Cancel");
cancel.setLabel("Quit");
t1.setEditable(false);
l1.setBounds(15,30,150,25);
t1.setBounds(170,30,150,25);
b1.setBounds(325,30,30,25);
upload.setBounds(60,80,80,25);
cancel.setBounds(160,80,80,25);
b1.addActionListener(this);
upload.addActionListener(this);
cancel.addActionListener(this);
jpanel.add(l1);
jpanel.add(t1);
jpanel.add(b1);
jpanel.add(upload);
jpanel.add(cancel);
cancel.setLabel("Cancel");
cancel.setText("Cancel");
return(jpanel);
public void actionPerformed(ActionEvent e)
if(e.getActionCommand().equals("b1"))
JFileChooser filechooser = new JFileChooser();
int rVal =filechooser.showOpenDialog(this);
if(rVal == JFileChooser.APPROVE_OPTION)
t1.setText(filechooser.getSelectedFile().getPath());
if(e.getActionCommand().equals("Upload"))
doUpload();
if(e.getActionCommand().equals("Cancel"))
System.exit(0);
public void doUpload()
try
File file=new File(t1.getText());
byte[] byts=new byte[(int)file.length()];
FileInputStream fis=new FileInputStream(file);
fis.read(byts,0,byts.length);
URL url=new URL(pathURL);
URLConnection con=url.openConnection();
con.setUseCaches(false);
con.setRequestProperty("CONTENT_TYPE","application/octet-stream");
con.setDoInput(true);
con.setDoOutput(true);
ObjectOutputStream out=new ObjectOutputStream(con.getOutputStream());
out.writeObject(file.getName());
out.writeObject(byts);
out.close();
ObjectInputStream os=new ObjectInputStream(con.getInputStream());
String str=(String)os.readObject();
os.close();
JOptionPane.showMessageDialog(this,str,"Client Upload",JOptionPane.PLAIN_MESSAGE);
catch(Exception e)
System.out.println(e.toString());
public static void main(String[] args)
pathURL="http:/localhost:8988/testservlet";
new TestClient();
I did not use the UI Editor, because my JDev does not have any FileChooser beans.
Any help would be appreciated.
gdI think you should double click on that notice to jump to the line of code which supposedly is faulty and inspect it. The UI editor is a bit 'buggy' and sometimes displays strange notices while the application compiles just fine. You should try to upgrade to 9.0.3 as I believe those notices are mostly fixed in that version.
-
Main method not found and how to put event handlers in an inner class
How would I put all the event handling methods in an inner class and I have another class that just that is just a main function, but when i try to run the project, it says main is not found. Here are the two classes, first one sets up everything and the second one is just main.
mport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class JournalFrame extends JFrame {
private JLabel dateLabel = new JLabel("Date: ");
private JTextField dateField = new JTextField(20);
private JPanel datePanel = new JPanel(new FlowLayout());
BorderLayout borderLayout1 = new BorderLayout();
JPanel radioPanel = new JPanel();
JPanel statusPanel = new JPanel();
JPanel textAreaPanel = new JPanel();
JPanel buttonPanel = new JPanel();
GridLayout gridLayout1 = new GridLayout();
FlowLayout flowLayout1 = new FlowLayout();
GridLayout gridLayout2 = new GridLayout();
GridLayout gridLayout3 = new GridLayout();
JRadioButton personalButton = new JRadioButton();
JRadioButton businessButton = new JRadioButton();
JLabel status = new JLabel();
JTextArea entryArea = new JTextArea();
JButton clearButton = new JButton();
JButton saveButton = new JButton();
ButtonGroup entryType = new ButtonGroup();
public JournalFrame(){
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
private void initWidgets(){
private void jbInit() throws Exception {
this.getContentPane().setLayout(borderLayout1);
radioPanel.setLayout(gridLayout1);
statusPanel.setLayout(flowLayout1);
textAreaPanel.setLayout(gridLayout2);
buttonPanel.setLayout(gridLayout3);
personalButton.setSelected(true);
personalButton.setText("Personal");
personalButton.addActionListener(new JournalFrame_personalButton_actionAdapter(this));
businessButton.setText("Business");
status.setText("");
entryArea.setText("");
entryArea.setColumns(10);
entryArea.setLineWrap(true);
entryArea.setRows(30);
entryArea.setWrapStyleWord(true);
clearButton.setPreferredSize(new Dimension(125, 25));
clearButton.setText("Clear Journal Entry");
clearButton.addActionListener(new JournalFrame_clearButton_actionAdapter(this));
saveButton.setText("Save Journal Entry");
saveButton.addActionListener(new JournalFrame_saveButton_actionAdapter(this));
this.setTitle("Journal");
gridLayout3.setColumns(1);
gridLayout3.setRows(0);
this.getContentPane().add(datePanel, BorderLayout.NORTH);
this.getContentPane().add(radioPanel, BorderLayout.WEST);
this.getContentPane().add(textAreaPanel, BorderLayout.CENTER);
this.getContentPane().add(buttonPanel, BorderLayout.EAST);
entryType.add(personalButton);
entryType.add(businessButton);
datePanel.add(dateLabel);
datePanel.add(dateField);
radioPanel.add(personalButton, null);
radioPanel.add(businessButton, null);
textAreaPanel.add(entryArea, null);
buttonPanel.add(clearButton, null);
buttonPanel.add(saveButton, null);
this.getContentPane().add(statusPanel, BorderLayout.SOUTH);
statusPanel.add(status, null);
this.pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
private void saveEntry() throws IOException{
if( personalButton.isSelected())
String file = "Personal.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
entryArea.getText();
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
else if (businessButton.isSelected())
String file = "Business.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
void clearButton_actionPerformed(ActionEvent e) {
dateField.setText("");
entryArea.setText("");
status.setText("");
void saveButton_actionPerformed(ActionEvent e){
try{
saveEntry();
}catch(IOException error){
status.setText("Error: Could not save journal entry");
void personalButton_actionPerformed(ActionEvent e) {
class JournalFrame_clearButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_clearButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.clearButton_actionPerformed(e);
class JournalFrame_saveButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_saveButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.saveButton_actionPerformed(e);
class JournalFrame_personalButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_personalButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.personalButton_actionPerformed(e);
public class JournalApp {
public static void main(String args[])
JournalFrame journal = new JournalFrame();
journal.setVisible(true);
}Bet you're trying "java JournalFrame" when you need to "java JournalApp".
Couple pointers toward good code.
1) Use white space (extra returns) to separate your code into logical "paragraphs" of thought.
2) Add comments. At a minimum a comment at the beginning should name the file, state its purpose, identify the programmer and date written. A comment at the end should state that you've reached the end. In the middle, any non-obvious code should be commented and closing braces or parens should have a comment stating what they close (if there is non-trivial separation from where they open).
Here's a sample:
// JournalFrame.java - this does ???
// saisoft, 4/18/03
// constructor
private void jbInit() throws Exception {
this.getContentPane().setLayout(borderLayout1);
radioPanel.setLayout(gridLayout1);
statusPanel.setLayout(flowLayout1);
textAreaPanel.setLayout(gridLayout2);
buttonPanel.setLayout(gridLayout3);
personalButton.setSelected(true);
personalButton.setText("Personal");
personalButton.addActionListener(new JournalFrame_personalButton_actionAdapter(this));
businessButton.setText("Business");
status.setText("");
entryArea.setText("");
entryArea.setColumns(10);
entryArea.setLineWrap(true);
entryArea.setRows(30);
entryArea.setWrapStyleWord(true);
} // end constructor
// end JournalFrame.java3) What would you expect to gain from that inner class? It might be more cool, but would it be more clear? I give the latter (clarity) a lot of importance. -
Main method not found and how to implement events in an inner class
How would I put all the event handling methods in an inner class and I have another class that just that is just a main function, but when i try to run the project, it says main is not found. Here are the two classes, first one sets up everything and the second one is just main.
mport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class JournalFrame extends JFrame {
private JLabel dateLabel = new JLabel("Date: ");
private JTextField dateField = new JTextField(20);
private JPanel datePanel = new JPanel(new FlowLayout());
BorderLayout borderLayout1 = new BorderLayout();
JPanel radioPanel = new JPanel();
JPanel statusPanel = new JPanel();
JPanel textAreaPanel = new JPanel();
JPanel buttonPanel = new JPanel();
GridLayout gridLayout1 = new GridLayout();
FlowLayout flowLayout1 = new FlowLayout();
GridLayout gridLayout2 = new GridLayout();
GridLayout gridLayout3 = new GridLayout();
JRadioButton personalButton = new JRadioButton();
JRadioButton businessButton = new JRadioButton();
JLabel status = new JLabel();
JTextArea entryArea = new JTextArea();
JButton clearButton = new JButton();
JButton saveButton = new JButton();
ButtonGroup entryType = new ButtonGroup();
public JournalFrame(){
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
private void initWidgets(){
private void jbInit() throws Exception {
this.getContentPane().setLayout(borderLayout1);
radioPanel.setLayout(gridLayout1);
statusPanel.setLayout(flowLayout1);
textAreaPanel.setLayout(gridLayout2);
buttonPanel.setLayout(gridLayout3);
personalButton.setSelected(true);
personalButton.setText("Personal");
personalButton.addActionListener(new JournalFrame_personalButton_actionAdapter(this));
businessButton.setText("Business");
status.setText("");
entryArea.setText("");
entryArea.setColumns(10);
entryArea.setLineWrap(true);
entryArea.setRows(30);
entryArea.setWrapStyleWord(true);
clearButton.setPreferredSize(new Dimension(125, 25));
clearButton.setText("Clear Journal Entry");
clearButton.addActionListener(new JournalFrame_clearButton_actionAdapter(this));
saveButton.setText("Save Journal Entry");
saveButton.addActionListener(new JournalFrame_saveButton_actionAdapter(this));
this.setTitle("Journal");
gridLayout3.setColumns(1);
gridLayout3.setRows(0);
this.getContentPane().add(datePanel, BorderLayout.NORTH);
this.getContentPane().add(radioPanel, BorderLayout.WEST);
this.getContentPane().add(textAreaPanel, BorderLayout.CENTER);
this.getContentPane().add(buttonPanel, BorderLayout.EAST);
entryType.add(personalButton);
entryType.add(businessButton);
datePanel.add(dateLabel);
datePanel.add(dateField);
radioPanel.add(personalButton, null);
radioPanel.add(businessButton, null);
textAreaPanel.add(entryArea, null);
buttonPanel.add(clearButton, null);
buttonPanel.add(saveButton, null);
this.getContentPane().add(statusPanel, BorderLayout.SOUTH);
statusPanel.add(status, null);
this.pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
private void saveEntry() throws IOException{
if( personalButton.isSelected())
String file = "Personal.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
entryArea.getText();
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
else if (businessButton.isSelected())
String file = "Business.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
void clearButton_actionPerformed(ActionEvent e) {
dateField.setText("");
entryArea.setText("");
status.setText("");
void saveButton_actionPerformed(ActionEvent e){
try{
saveEntry();
}catch(IOException error){
status.setText("Error: Could not save journal entry");
void personalButton_actionPerformed(ActionEvent e) {
class JournalFrame_clearButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_clearButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.clearButton_actionPerformed(e);
class JournalFrame_saveButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_saveButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.saveButton_actionPerformed(e);
class JournalFrame_personalButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_personalButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.personalButton_actionPerformed(e);
public class JournalApp {
public static void main(String args[])
JournalFrame journal = new JournalFrame();
journal.setVisible(true);
}Here is the complete code (with crappy indentation) :
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
public class JournalFrame extends JFrame {
private JLabel dateLabel = new JLabel("Date: ");
private JTextField dateField = new JTextField(20);
private JPanel datePanel = new JPanel(new FlowLayout());
BorderLayout borderLayout1 = new BorderLayout();
JPanel radioPanel = new JPanel();
JPanel statusPanel = new JPanel();
JPanel textAreaPanel = new JPanel();
JPanel buttonPanel = new JPanel();
GridLayout gridLayout1 = new GridLayout();
FlowLayout flowLayout1 = new FlowLayout();
GridLayout gridLayout2 = new GridLayout();
GridLayout gridLayout3 = new GridLayout();
JRadioButton personalButton = new JRadioButton();
JRadioButton businessButton = new JRadioButton();
JLabel status = new JLabel();
JTextArea entryArea = new JTextArea();
JButton clearButton = new JButton();
JButton saveButton = new JButton();
ButtonGroup entryType = new ButtonGroup();
public JournalFrame(){
try {
jbInit();
catch(Exception e){
e.printStackTrace();
private void initWidgets(){
private void jbInit() throws Exception {
this.getContentPane().setLayout(borderLayout1);
radioPanel.setLayout(gridLayout1);
statusPanel.setLayout(flowLayout1);
textAreaPanel.setLayout(gridLayout2);
buttonPanel.setLayout(gridLayout3);
personalButton.setSelected(true);
personalButton.setText("Personal");
personalButton.addActionListener(new JournalFrame_personalButton_actionAdapter(this));
businessButton.setText("Business");
status.setText("");
entryArea.setText("");
entryArea.setColumns(10);
entryArea.setLineWrap(true);
entryArea.setRows(30);
entryArea.setWrapStyleWord(true);
clearButton.setPreferredSize(new Dimension(125, 25));
clearButton.setText("Clear Journal Entry");
clearButton.addActionListener(new JournalFrame_clearButton_actionAdapter(this));
saveButton.setText("Save Journal Entry");
saveButton.addActionListener(new JournalFrame_saveButton_actionAdapter(this));
this.setTitle("Journal");
gridLayout3.setColumns(1);
gridLayout3.setRows(0);
this.getContentPane().add(datePanel, BorderLayout.NORTH);
this.getContentPane().add(radioPanel, BorderLayout.WEST);
this.getContentPane().add(textAreaPanel, BorderLayout.CENTER);
this.getContentPane().add(buttonPanel, BorderLayout.EAST);
entryType.add(personalButton);
entryType.add(businessButton);
datePanel.add(dateLabel);
datePanel.add(dateField);
radioPanel.add(personalButton, null);
radioPanel.add(businessButton, null);
textAreaPanel.add(entryArea, null);
buttonPanel.add(clearButton, null);
buttonPanel.add(saveButton, null);
this.getContentPane().add(statusPanel, BorderLayout.SOUTH);
statusPanel.add(status, null);
this.pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
private void saveEntry() throws IOException{
if( personalButton.isSelected()){
String file = "Personal.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
entryArea.getText();
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
else if (businessButton.isSelected()){
String file = "Business.txt";
BufferedWriter bw = new BufferedWriter(new FileWriter(file,true));
bw.write("Date: " + dateField.getText());
bw.newLine();
bw.write(entryArea.getText());
bw.newLine();
bw.flush();
bw.close();
status.setText("Journal Entry Saved");
void clearButton_actionPerformed(ActionEvent e) {
dateField.setText("");
entryArea.setText("");
status.setText("");
void saveButton_actionPerformed(ActionEvent e){
try{saveEntry();}catch(IOException error){
status.setText("Error: Could not save journal entry");
void personalButton_actionPerformed(ActionEvent e) {
class JournalFrame_clearButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_clearButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.clearButton_actionPerformed(e);
class JournalFrame_saveButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_saveButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.saveButton_actionPerformed(e);
class JournalFrame_personalButton_actionAdapter implements java.awt.event.ActionListener {
JournalFrame adaptee;
JournalFrame_personalButton_actionAdapter(JournalFrame adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.personalButton_actionPerformed(e);
}BadLands -
Variable not found in class....?????
package untitled1;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class Applet1 extends Applet
Button knop1, knop2, knop3;
TextField tekstvakje;
Font opmaak1, opmaak2, opmaak3;
public void init()
knop1 = new Button("knop 1");
knop1.addActionListener(new Knop1Handler());
knop2 = new Button("knop 2");
knop2.addActionListener(new Knop2Handler());
knop3 = new Button("knop 3");
knop3.addActionListener(new Knop3Handler());
tekstvakje = new TextField("test",10);
opmaak1 = new Font("Serif", Font.BOLD, 10);
opmaak2 = new Font("Serif", Font.ITALIC, 15);
opmaak3 = new Font("Serif", Font.PLAIN, 20);
add(knop1);
add(knop2);
add(knop3);
add(tekstvakje);
class Knop1Handler implements ActionListener
public void actionPerformed(ActionEvent e)
tekstvakje.setFont(opmaak1);
class Knop2Handler implements ActionListener
public void actionPerformed(ActionEvent e)
tekstvakje.setFont(opmaak2);
class Knop3Handler implements ActionListener
public void actionPerformed(ActionEvent e)
tekstvakje.setFont(opmaak3);
error message:
"Applet1.java": Error #: 300 : variable opmaak1 not found in class untitled1.Knop1Handler at line 38, column 28
"Applet1.java": Error #: 300 : variable tekstvakje not found in class untitled1.Knop1Handler at line 38, column 9
"Applet1.java": Error #: 300 : variable opmaak2 not found in class untitled1.Knop2Handler at line 45, column 28
and so on........
what's the reason he don't fount this variables??? the KnopHandlers are a subclass fromm Applet so I don't understand the subclass can't find the variables....
sorry for this stupid question, but I just started with making Object Orientated code.moi,
Ten eerste is Knop1Handler geen subclass van Applet maar van Object. Alle classen erfen van object of een subclass van Object.
Ik neem aan dat Knop1Handler een aparte class is in een apart bestand. Dan kan hij nooit attribute van Applet1 gebruiken. Dat gaat enkel via inner classes.
Je kan verschillende dingen doen:
je maakt de Knop1Handler class een inner class wat in dit geval de mooiste oplossing is.
je verplaatst Font opmaak1 naar class Knop1Handler.
je maakt Font opmaak1 static en roept in class Knop1Handler Applet1.opmaak1. wat een slechte oplossing is -
"method (...) not found in class (...)" problem
I am having trouble with my GUI class not recognizing methods from a STACK class from the same package. Here's the skinny:
I have a GUI class named WordGUI.
I hava a STACK class named WordStack.
within WordGUI I instantiate an instance of a WordStack and call it myStack. Example below:
WordStack myStack = new WordStack();
When I call WordStack methods from WordGUI I get the error message even though display is a method from WordStack:
"WordGUI.java": Error #: 300 : method display(java.awt.Graphics, int) not found in class assign4.WordStack at line 34, column 13
Complete code for both classes is below:
WordGUI class:
package assign4;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class WordGUI extends Applet implements ActionListener{
WordStack myStack = new WordStack();
private Button testButton;
private TextField wordField;
public void init(){
//add(myStack);
wordField = new TextField(20);
add(wordField);
wordField.addActionListener(this);
testButton = new Button("Test for palindromes");
add(testButton);
testButton.addActionListener(this);
}//init()
public void paint (Graphics g){
g.drawString("Enter a word in the textField above and click", 25, 100);
g.drawString("the button to check if the word is a palindrome", 25, 115);
myStack.display(g, 150);
}//paint()
public void actionPerformed(ActionEvent event){
if(event.getSource() == testButton){
String userInput = wordField.getText();
myStack.evaluate(userInput);
repaint();
}//actionPerformed()
}//class WordGUI
WordStack class:
package assign4;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class WordStack implements Cloneable{
private char[] data;
private int manyItems;
public WordStack(){
final int initialCapacity = 20;
manyItems = 0;
data = new char[initialCapacity];
}//generic constructor
public WordStack(int initialCapacity){
if(initialCapacity < 0){
throw new IllegalArgumentException
("initialCapacity too small: " + initialCapacity);
manyItems = 0;
data = new char[initialCapacity];
}//constructor
public int getCapacity(){
return data.length;
}//getCapacity()
public boolean isEmpty(){
return (manyItems == 0);
}//isEmpty()
public char pop(){
if(manyItems == 0){
//throw new EmptyStackException();
return data[--manyItems];
}//pop()
public void push(char item){
if(manyItems == data.length){
ensureCapacity(manyItems * 2 + 1);
data[manyItems] = item;
manyItems++;
}//push()
public void ensureCapacity(int minimumCapacity){
char biggerArray[];
if(data.length < minimumCapacity){
biggerArray = new char[minimumCapacity];
System.arraycopy(data, 0, biggerArray, 0, manyItems);
data = biggerArray;
}//ensureCapacity()
public String evaluate(String userInput){
char charToProcess;
for(int charNum = 0; charNum < userInput.length(); charNum++){
push(userInput.charAt(charNum));
}//evaluate()
public void display(Graphics g, int yLoc){
for(int i = 0; i < data.length; i++){
g.drawString("" + data, 25, yLoc);
yLoc += 15;
}//display()
}//class WordStack
Any help would be appreciated greatly. Thank youyou need to make your graphics call against the GUI object
-
SetJPEGEncodeParam method not found in JPEGImageEncoder jdk 1.5 and jdk 1.6
Hi,
We are group of students working on college project.
We want to capture webcam and show stream on screen.
We are using JMF and class JPEGImageEncoder.
Here we are getting setJPEGEncodeParam method not found error.
Please see detail error message and source code attached below.
Thanks in advance.
Regards,
Vinayak & Surendra
// Error and Warnings
SwingCapture.java:125: warning: com.sun.image.codec.jpeg.JPEGImageEncoder is Sun proprietary API and may be removed in a future release
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
^
SwingCapture.java:125: warning: com.sun.image.codec.jpeg.JPEGCodec is Sun proprietary API and may be removed in a future release
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
^
SwingCapture.java:126: warning: com.sun.image.codec.jpeg.JPEGEncodeParam is Sun proprietary API and may be removed in a future release
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
^
SwingCapture.java:128: cannot find symbol
symbol : method setJPEGEncodeParam(com.sun.image.codec.jpeg.JPEGEncodeParam)
location: class com.sun.image.codec.jpeg.JPEGImageEncoder
encoder.setJPEGEncodeParam(param);
^
1 error
3 warnings
// Source code
import javax.swing.*;
import javax.swing.event.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.util.*;
import javax.media.control.*;
import javax.media.protocol.*;
import java.util.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
import com.sun.image.codec.jpeg.*;
public class SwingCapture extends Panel implements ActionListener
public static Player player = null;
public CaptureDeviceInfo di = null;
public MediaLocator ml = null;
public JButton capture = null;
public Buffer buf = null;
public Image img = null;
public VideoFormat vf = null;
public BufferToImage btoi = null;
public ImagePanel imgpanel = null;
public SwingCapture()
setLayout(new BorderLayout());
setSize(320,550);
imgpanel = new ImagePanel();
capture = new JButton("Capture");
capture.addActionListener(this);
String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
di = CaptureDeviceManager.getDevice(str2);
ml = di.getLocator();
try
player = Manager.createRealizedPlayer(ml);
player.start();
Component comp;
if ((comp = player.getVisualComponent()) != null)
add(comp,BorderLayout.NORTH);
add(capture,BorderLayout.CENTER);
add(imgpanel,BorderLayout.SOUTH);
catch (Exception e)
e.printStackTrace();
public static void main(String[] args)
Frame f = new Frame("SwingCapture");
SwingCapture cf = new SwingCapture();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
playerclose();
System.exit(0);}});
f.add("Center",cf);
f.pack();
f.setSize(new Dimension(320,550));
f.setVisible(true);
public static void playerclose()
player.close();
player.deallocate();
public void actionPerformed(ActionEvent e)
JComponent c = (JComponent) e.getSource();
if (c == capture)
// Grab a frame
FrameGrabbingControl fgc = (FrameGrabbingControl)
player.getControl("javax.media.control.FrameGrabbingControl");
buf = fgc.grabFrame();
// Convert it to an image
btoi = new BufferToImage((VideoFormat)buf.getFormat());
img = btoi.createImage(buf);
// show the image
imgpanel.setImage(img);
// save image
saveJPG(img,"c:\\test.jpg");
class ImagePanel extends Panel
public Image myimg = null;
public ImagePanel()
setLayout(null);
setSize(320,240);
public void setImage(Image img)
this.myimg = img;
repaint();
public void paint(Graphics g)
if (myimg != null)
g.drawImage(myimg, 0, 0, this);
public static void saveJPG(Image img, String s)
BufferedImage bi = new BufferedImage(img.getWidth(null),
img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
out = new FileOutputStream(s);
catch (java.io.FileNotFoundException io)
System.out.println("File Not Found");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f,false);
encoder.setJPEGEncodeParam(param);
try
encoder.encode(bi);
out.close();
catch (java.io.IOException io)
System.out.println("IOException");JPEGImageEncoder isn't a JMF class...so this isn't a JMF question. You need to go to the appropriate forum, which would be Java2D, I believe.
Also, is there a specific reason you're not just capturing from your web camera directly? -
Input/Output And Method Not Found Problem
Ok so firstly I think I should apologise on two fronts.
Firstly, 'cause this is probably posted in the wrong board but I'm not sure this was suitable for the Swing board just 'cause I've been using Swing? And secondly 'cause the code I'm gonna post is so shoddy I would think this constitutes as flaim-bait. >_>
In my defense this is purely for a little class project to give something to write some documentation on so I'm really not too bothered about the efficiency or ace-mazingness of the end result. I just want it to work.
To the problem at hand.
I'm trying to write a program that asks the user a question and then outputs their answer to a file, from which a tally of answers can later be made for the purpose of displaying "results".
My problem is I've been having problems with the input/output of saving the answers given to the program.
I'm still learning and input/output is probably my weakest subject (other than, y'know, being good at Java). I've had a bash at it in the following code but all it does it overwrite what is in the file with a single answer so no list of results accumulate. I generally don't have an idea what to try for that one so any pointers would be appreciated.
Also, my second problem is, in trying to gather results by tallying what is contained in the file, I've run across a problem with the charAt() method not being found and I'm not sure why. Isn't that method a part of java.lang?
Here's the code thus far:
//libraries
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.io.*;
class CaseStudy {
public static void main(String args[]) {
GUI maininterface = new GUI();
maininterface.setupMenu();
maininterface.display();
class GUI {
//for the actionlisteners
int whatframe = 0;
//creates mainframe and border content panel
JFrame mainframe = new JFrame("Survey Client");
JPanel borderpanel = new JPanel(), bottompanel = new JPanel();
JButton quizbutton = new JButton("Take the quiz"), tallybutton = new JButton("Show Results"), submitbutton = new JButton("Submit Results"), menubutton = new JButton("Return To Menu");
QuizQuestions toppanel = new QuizQuestions();
QuizResults toppanel2 = new QuizResults();
GUI() {
//sets border in borderpanel, this spaces the main content in from the sides of the window
borderpanel.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
//sets up the frame and panels and adds on borders
mainframe.setDefaultCloseOperation(mainframe.EXIT_ON_CLOSE); // exits java when clicking on close on main frame
mainframe.getContentPane().add(borderpanel); // adds the panel as a component to the frame, the panel can hold stuffs
borderpanel.setLayout(new BoxLayout(borderpanel, BoxLayout.PAGE_AXIS));// page_axis means it'll layout vertically
bottompanel.setLayout(new BoxLayout(bottompanel, BoxLayout.LINE_AXIS));// line_axis means it'll layout horizontally
//gives button an action
quizbutton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
setupQuiz();
tallybutton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
if(whatframe == 1) setupResults();
else {
int rusure = JOptionPane.showConfirmDialog(null, "Are you sure you wish to show results? Any current quiz answers won't be saved.", "Please Choose One", JOptionPane.YES_NO_OPTION);
if(rusure == JOptionPane.YES_OPTION) setupResults();
menubutton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
setupMenu();
submitbutton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
toppanel.doQuiz();
borderpanel.add(bottompanel);
public void setupMenu() {
if(whatframe == 3) {
bottompanel.remove(menubutton);
borderpanel.remove(toppanel2);
whatframe = 1;
//adds components and lays them out
bottompanel.add(quizbutton);
bottompanel.add(Box.createRigidArea(new Dimension(0,10)));
bottompanel.add(tallybutton);
display();
public void setupQuiz() {
bottompanel.remove(quizbutton);
bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
bottompanel.remove(tallybutton);
whatframe = 2;
bottompanel.add(submitbutton);
bottompanel.add(Box.createRigidArea(new Dimension(0,10)));
bottompanel.add(tallybutton);
borderpanel.add(toppanel);
display();
public void setupResults() {
if(whatframe == 1) {
bottompanel.remove(quizbutton);
bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
bottompanel.remove(tallybutton);
else {
bottompanel.remove(submitbutton);
bottompanel.remove(Box.createRigidArea(new Dimension(0,10)));
bottompanel.remove(tallybutton);
borderpanel.remove(toppanel);
whatframe = 3;
bottompanel.add(menubutton);
borderpanel.add(toppanel2);
display();
public void display() {
//sets the size of the frame around it's components and then shows it
mainframe.pack();
mainframe.setVisible(true);
mainframe.validate(); //makes referenced container relayout it's components
class QuizQuestions extends JPanel {
LoadingSaving loadsave = new LoadingSaving();
JPanel popm = new JPanel(), pop1 = new JPanel(), pop2 = new JPanel(), pop3 = new JPanel(), pop4 = new JPanel();
JFormattedTextField ques = new JFormattedTextField(), op1 = new JFormattedTextField(), op2 = new JFormattedTextField(), op3 = new JFormattedTextField(), op4 = new JFormattedTextField();
JButton bop1 = new JButton("1"), bop2 = new JButton("2"), bop3 = new JButton("3"), bop4 = new JButton("4");
char answer;
QuizQuestions() {
popm.setLayout(new BoxLayout(popm, BoxLayout.PAGE_AXIS));
pop1.setLayout(new BoxLayout(pop1, BoxLayout.LINE_AXIS));
pop2.setLayout(new BoxLayout(pop2, BoxLayout.LINE_AXIS));
pop3.setLayout(new BoxLayout(pop3, BoxLayout.LINE_AXIS));
pop4.setLayout(new BoxLayout(pop4, BoxLayout.LINE_AXIS));
this.add(popm);
popm.add(ques);
popm.add(pop1);
popm.add(pop2);
popm.add(pop3);
popm.add(pop4);
pop1.add(op1);
pop1.add(bop1);
pop2.add(op2);
pop2.add(bop2);
pop3.add(op3);
pop3.add(bop3);
pop4.add(op4);
pop4.add(bop4);
//sets up question text fields
ques.setEditable(false);
op1.setEditable(false);
op2.setEditable(false);
op3.setEditable(false);
op4.setEditable(false);
bop1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
answer = 'a';
bop2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
answer = 'b';
bop3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
answer = 'c';
bop4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e1) {
answer = 'd';
Question1();
public void doQuiz() {
loadsave.save(answer);
public void Question1() {
ques.setValue("Who's your favourite X-Men character?");
op1.setValue("Cyclops");
op2.setValue("Xavier");
op3.setValue("Wolverine");
op4.setValue("Rogue");
class QuizResults extends JPanel {
LoadingSaving loadsave = new LoadingSaving();
JPanel popm = new JPanel();
JFormattedTextField op1 = new JFormattedTextField(), op2 = new JFormattedTextField(), op3 = new JFormattedTextField(), op4 = new JFormattedTextField();
int[] answerarray = new int[4];
QuizResults() {
popm.setLayout(new BoxLayout(popm, BoxLayout.PAGE_AXIS));
this.add(popm);
popm.add(op1);
popm.add(op2);
popm.add(op3);
popm.add(op4);
op1.setEditable(false);
op2.setEditable(false);
op3.setEditable(false);
op4.setEditable(false);
answerarray = loadsave.load();
op1.setValue(answerarray[0]);
op2.setValue(answerarray[1]);
op3.setValue(answerarray[2]);
op4.setValue(answerarray[3]);
class LoadingSaving {
public void save(char answer) {
FileReader fr;
FileWriter fw;
BufferedReader br;
String s;
try {
//ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
fr = new FileReader("casestudyoutput.txt");
fw = new FileWriter("casestudyoutput.txt");
br = new BufferedReader(fr);
if (br.readLine() == null) s = "x";
else s = br.readLine();
s = s + answer;
fw.write(s);
fr.close();
fw.close();
//ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
catch(FileNotFoundException exc) {
JOptionPane.showMessageDialog(null, "File not found.");
return;
catch(IOException exc) {
JOptionPane.showMessageDialog(null, "Something bad happened.");
return;
public int[] load() {
FileReader fr;
BufferedReader br;
int[] answerarray = new int[3];
String s;
long length;
int a = 0, b = 0, c = 0, d = 0;
answerarray[0] = 0;
answerarray[1] = 0;
answerarray[2] = 0;
answerarray[3] = 0;
try {
fr = new FileReader("casestudyoutput.txt");
br = new BufferedReader(fr);
if (br.readLine() == null) return answerarray;
else s = br.readLine();
length = s.length();
for(int i = 0; i < length; i++) {
char ch = charAt(i); //ERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERRORERROR
switch(ch) {
case 'a':
a++;
break;
case 'b':
b++;
break;
case 'c':
c++;
break;
case 'd':
d++;
break;
answerarray[0] = a;
answerarray[1] = b;
answerarray[2] = c;
answerarray[3] = d;
fr.close();
catch(FileNotFoundException exc) {
JOptionPane.showMessageDialog(null, "File not found.");
return answerarray;
catch(IOException exc) {
JOptionPane.showMessageDialog(null, "Something bad happened.");
return answerarray;
return answerarray;
}Any pointers/tips/solutions/angry posts to tell me to stop trying to learn Java would be greatly appreciated.
Thanks in advance!
Oh, and in trying to work with it a bit further I realised I'm having a few problems with runtime errors due to exceptions. The first was due to the array being assigned out of bounds (fixed in the above code). But the second reads the following:
Exception in thread "main" java.lang.NullPointerException
at Loadingsaving.load(CaseStudy.java:330)
at QuizResults.(init)(CaseStudy.java.259)
at GUI.(init)(CaseStudy.java:34)
at CaseStudy.main(CaseStudy.java:15)Not quite sure what this one means or how to handle it. =\
Edited by: ThePermster on May 19, 2008 8:08 AMA NullPointerException means a method has been called on a null object, or a variable that isn't pointing to any object. Your Exception points to line 330, which is:
length = s.length();A NPE on that line means that s is null. So let's look at where s is set:
if (br.readLine() == null) return answerarray;
else s = br.readLine();s gets it's value from br.readLine(), so that method must be returning null. You have a logical error here. Look at your If-Else. It reads a line, makes sure it isn't null...then it reads another line. Well what if that line is null? You are performing 2 reads here instead of 1.
Since your If condition returns a value, there's no need for an Else. The code will continue on until it reaches another return. Try this:
s = br.readLine();
if (s == null) return answerarray; -
SetJPEGEncodeParam method not found
Hi,
We are group of students working on college project.
We want to capture webcam and show stream on screen.
We are using JMF and class JPEGImageEncoder.
Here we are getting setJPEGEncodeParam method not found error.
Please see detail error message and source code attached below.
Thanks in advance.
Regards,
Vinayak & Surendra
// Error and Warnings
SwingCapture.java:125: warning:
com.sun.image.codec.jpeg.JPEGImageEncoder is Sun proprietary API and
may be removed in a future release
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
^
SwingCapture.java:125: warning: com.sun.image.codec.jpeg.JPEGCodec is
Sun proprietary API and may be removed in a future release
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
^
SwingCapture.java:126: warning:
com.sun.image.codec.jpeg.JPEGEncodeParam is Sun proprietary API and
may be removed in a future release
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
^
SwingCapture.java:128: cannot find symbol
symbol : method setJPEGEncodeParam
(com.sun.image.codec.jpeg.JPEGEncodeParam)
location: class com.sun.image.codec.jpeg.JPEGImageEncoder
encoder.setJPEGEncodeParam(param);
^
1 error
3 warnings
// Source code
import javax.swing.;
import javax.swing.event.;
import java.io.;
import javax.media.;
import javax.media.format.;
import javax.media.util.;
import javax.media.control.;
import javax.media.protocol.;
import java.util.;
import java.awt.;
import java.awt.image.;
import java.awt.event.;
import com.sun.image.codec.jpeg.*;
public class SwingCapture extends Panel implements ActionListener
public static Player player = null;
public CaptureDeviceInfo di = null;
public MediaLocator ml = null;
public JButton capture = null;
public Buffer buf = null;
public Image img = null;
public VideoFormat vf = null;
public BufferToImage btoi = null;
public ImagePanel imgpanel = null;
public SwingCapture()
setLayout(new BorderLayout());
setSize(320,550);
imgpanel = new ImagePanel();
capture = new JButton("Capture");
capture.addActionListener(this);
String str1 = "vfw:Logitech USB Video Camera:0";
String str2 = "vfw:Microsoft WDM Image Capture (Win32):0";
di = CaptureDeviceManager.getDevice(str2);
ml = di.getLocator();
try
player = Manager.createRealizedPlayer(ml);
player.start();
Component comp;
if ((comp = player.getVisualComponent()) != null)
add(comp,BorderLayout.NORTH);
add(capture,BorderLayout.CENTER);
add(imgpanel,BorderLayout.SOUTH);
catch (Exception e)
e.printStackTrace();
public static void main(String[] args)
Frame f = new Frame("SwingCapture");
SwingCapture cf = new SwingCapture();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
playerclose();
System.exit(0);}});
f.add("Center",cf);
f.pack();
f.setSize(new Dimension(320,550));
f.setVisible(true);
public static void playerclose()
player.close();
player.deallocate();
public void actionPerformed(ActionEvent e)
JComponent c = (JComponent) e.getSource();
if (c == capture)
// Grab a frame
FrameGrabbingControl fgc = (FrameGrabbingControl)
player.getControl("javax.media.control.FrameGrabbingControl");
buf = fgc.grabFrame();
// Convert it to an image
btoi = new BufferToImage((VideoFormat)buf.getFormat());
img = btoi.createImage(buf);
// show the image
imgpanel.setImage(img);
// save image
saveJPG(img,"c:\\test.jpg");
class ImagePanel extends Panel
public Image myimg = null;
public ImagePanel()
setLayout(null);
setSize(320,240);
public void setImage(Image img)
this.myimg = img;
repaint();
public void paint(Graphics g)
if (myimg != null)
g.drawImage(myimg, 0, 0, this);
public static void saveJPG(Image img, String s)
BufferedImage bi = new BufferedImage(img.getWidth(null),
img.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(img, null, null);
FileOutputStream out = null;
try
out = new FileOutputStream(s);
catch (java.io.FileNotFoundException io)
System.out.println("File Not Found");
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(0.5f,false);
encoder.setJPEGEncodeParam(param);
try
encoder.encode(bi);
out.close();
catch (java.io.IOException io)
System.out.println("IOException");
}look at: javax.imageio.ImageIO
File myFile = new File(myFileName);
myFile.createNewFile();
ImageIO.write(myImage, "JPEG", myFile);also post your code with code tags--otherwise the forum software will alter your code, using some of it as formatting sequences. -
GetAudioClip() not found in class . Help !
Dear People,
I have one error message "getAudioClip() not found in class.
I investigated in the AppletContext interface for the signature of the
method. It says that the signature of the "getAudioClip()" method has
one parameter. That parameter is the url which has the audio clip.
I did include the address to the audio clip presently on my hard drive
c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk
below is the program
Thank you for your advice
Norman
import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import java.applet.*;
import java.awt.event.*;
public abstract class MyMusicApplet_1 extends JApplet implements ActionListener, AppletContext
//AppletContext myAppletContext = new AppletContext();
//Iterator i = myAppletContext.getStreamKeys();
JButton myJButton;
AudioClip acSound_1 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk");
AudioClip acSound_2 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_3 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_4 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_5 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_6 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_7 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_8 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
AudioClip acSound_9 = getAudioClip("c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk ");
JButton myJButtonSound1;
JButton myJButtonSound2;
JButton myJButtonSound3;
JButton myJButtonSound4;
JButton myJButtonSound5;
JButton myJButtonSound6;
JButton myJButtonSound7;
JButton myJButtonSound8;
JButton myJButtonSound9;
public void init()
Container myContentPane = getContentPane();
myContentPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
Dimension buttonSize = new Dimension(190,100);
Font myFont = new Font("Arial", Font.BOLD,14);
Border myEdge = BorderFactory.createRaisedBevelBorder();
//create 1st button's object
myJButtonSound1 = new JButton("sound #1");
myJButtonSound1.addActionListener(this);
//set the button's border and size, font background and foreground
myJButtonSound1.setBorder(myEdge);
myJButtonSound1.setPreferredSize(buttonSize);
myJButtonSound1.setFont(myFont);
myJButtonSound1.setBackground(Color.orange);
myJButtonSound1.setForeground(Color.black);
//create 2nd button's object
myJButtonSound2 = new JButton("sound #2");
myJButtonSound2.addActionListener(this);
//set the button's border and size, font, background and foreground
myJButtonSound2.setBorder(myEdge);
myJButtonSound2.setPreferredSize(buttonSize);
myJButtonSound2.setFont(myFont);
myJButtonSound2.setBackground(Color.blue);
myJButtonSound2.setForeground(Color.black);
//create 3rd button's object
myJButtonSound3 = new JButton("sound #3");
myJButtonSound1.addActionListener(this);
//set the button's border and size, font, background and foreground
myJButtonSound3.setBorder(myEdge);
myJButtonSound3.setPreferredSize(buttonSize);
myJButtonSound3.setFont(myFont);
myJButtonSound3.setBackground(Color.cyan);
myJButtonSound3.setForeground(Color.black);
//create 4th button's object
myJButtonSound4 = new JButton("sound #4");
myJButtonSound4.addActionListener(this);
//set the button's border and size, font background and foreground
myJButtonSound4.setBorder(myEdge);
myJButtonSound4.setPreferredSize(buttonSize);
myJButtonSound4.setFont(myFont);
myJButtonSound4.setBackground(Color.pink);
myJButtonSound4.setForeground(Color.black);
//create 5th button's object
myJButtonSound5 = new JButton("sound #5");
myJButtonSound5.addActionListener(this);
//set the button's border and size, font background and foreground
myJButtonSound5.setBorder(myEdge);
myJButtonSound5.setPreferredSize(buttonSize);
myJButtonSound5.setFont(myFont);
myJButtonSound5.setBackground(Color.red);
myJButtonSound5.setForeground(Color.black);
//create 6th button's object
myJButtonSound6 = new JButton("sound #6");
myJButtonSound6.addActionListener(this);
//set the button's border and size, font, background and foreground
myJButtonSound6.setBorder(myEdge);
myJButtonSound6.setPreferredSize(buttonSize);
myJButtonSound6.setFont(myFont);
myJButtonSound6.setBackground(Color.pink);
myJButtonSound6.setForeground(Color.black);
//create 7th button's object
myJButtonSound7 = new JButton("Choice #7");
myJButtonSound7.addActionListener(this);
//set the button's border and size, font, background and foreground
myJButtonSound7.setBorder(myEdge);
myJButtonSound7.setPreferredSize(buttonSize);
myJButtonSound7.setFont(myFont);
myJButtonSound7.setBackground(Color.cyan);
myJButtonSound7.setForeground(Color.black);
//create 8th button's object
myJButtonSound8 = new JButton("Choice #8");
myJButtonSound8.addActionListener(this);
//set the button's border and size, font background and foreground
myJButtonSound8.setBorder(myEdge);
myJButtonSound8.setPreferredSize(buttonSize);
myJButtonSound8.setFont(myFont);
myJButtonSound8.setBackground(Color.yellow);
myJButtonSound8.setForeground(Color.black);
//create 9th button's object
myJButtonSound9 = new JButton("Choice #9");
myJButtonSound9.addActionListener(this);
//set the button's border and size, font background and foreground
myJButtonSound9.setBorder(myEdge);
myJButtonSound9.setPreferredSize(buttonSize);
myJButtonSound9.setFont(myFont);
myJButtonSound9.setBackground(Color.blue);
myJButtonSound9.setForeground(Color.black);
//add the buttons to the content pane
myContentPane.add(myJButtonSound1);
myContentPane.add(myJButtonSound2);
myContentPane.add(myJButtonSound3);
myContentPane.add(myJButtonSound4);
myContentPane.add(myJButtonSound5);
myContentPane.add(myJButtonSound6);
myContentPane.add(myJButtonSound7);
myContentPane.add(myJButtonSound8);
myContentPane.add(myJButtonSound9);
public void actionPerformed(ActionEvent e)
myJButton = (JButton)e.getSource();
if(myJButton == myJButtonSound1)
acSound_1.play();
if(myJButton == myJButtonSound2)
acSound_2.play();
if(myJButton == myJButtonSound3)
acSound_3.play();
if(myJButton == myJButtonSound4)
acSound_4.play();
if(myJButton == myJButtonSound5)
acSound_5.play();
if(myJButton == myJButtonSound6)
acSound_6.play();
if(myJButton == myJButtonSound7)
acSound_7.play();
if(myJButton == myJButtonSound8)
acSound_8.play();
if(myJButton == myJButtonSound9)
acSound_9.play();You are passing a String. A String is not an instanceof the URL class. Look at the java.net.URL class. Dear BBrita,
I looked at the URL class in the Java API and did not find anything that told me how to pass the URL
"c:/Program Files/Cakewalk/Cakewalk Pro Audio 9/seashore.wrk"
which is stored on my hard drive.
Thank you in advance
Norman -
Com.sun.* Not Found only in NetBeans - Javac finds them fine!
I am not sure what is up with this, but NetBeans will not let me specify anything from the com.* packages. It shows the packages in the auto-type boxes as I type in the name (com.sun.blahblahblah) but highlights the statement with a red underline and states 'Package not found".
Just to let it be known, I have a look-and-feel demo java file downloaded from the net that compiled perfect and runs as expected, and it makes much use of the com.sun.* packages. And I can run NetBeans with the --laf command line option and it will run using any of the LAF's in the com.* packages itself, but still not see them in the IDE for coding use ><
Any ideas?
Thanks in advance.I just popped in what you wrote, and another thing just for giggles:
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.crypto.provider.*;and they threw no errors. Why is it that my laf is throwing errors when they are plainly there?
Example -
public void actionPerformed(ActionEvent event) {
try {
UIManager.setLookAndFeel(getText());
SwingUtilities.updateComponentTreeUI(
ChangingLaF.this);
// call myFrame.pack()
// to resize frame for laf
} catch (IllegalAccessException e) {
// insert code to handle this exception
} catch (UnsupportedLookAndFeelException e) {
// insert code to handle this exception
} catch (InstantiationException e) {
// insert code to handle this exception
} catch (ClassNotFoundException e) {
// insert code to handle this exception
}This is the code I got off the net, this + a bit more to the .java file of course, compiles perfect with javac. The programmer used the package path com.sun.blahblah as the radiobutton text, that is what the UIManager.setLookAndFeel(getText()); getText() nonsense is. But other than that I see no reason an erro should be thrown in netbeans over UIManager.setLookAndFeel(com.sun.java.swing.plaf.motif.MotifLookAndFeel);
I did try it with quotes though as a previous post recomended and got this message:
init:
deps-jar:
Compiling 1 source file to E:\Java Apps\Calendar\build\classes
E:\Java Apps\Calendar\src\Main\MainFrame.java:283: unreported exception java.lang.ClassNotFoundException; must be caught or declared to be thrown
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
1 error
BUILD FAILED (total time: 0 seconds)
< -
Item cost not found for one or more items - Inventory Posting
Good Day Mentors,
My user has encountered an error during Inventory Posting and its "Item cost not found for one or more items".
The specific Message ID from SAP's System Message Log is 10001287.
I found a similar post which addresses this error here.
But unfortunately it did not help me solve my user's problem.
I already checked if the items had a defined "Item Cost" in the Item Master Data Inventory Tab, and they all have "Item Cost" defined.
I'm not sure if this will help, but below is the Inventory Audit Report of one of the items that is throwing the "Item cost not found" error.
I am not a business consultant neither am I literate in accounting, so thanks for the patience.
SAP Version: 9.0 PL5
Valuation Method: Moving Average
Thanks in advance!
SeanHi Augusto and Raviraj,
I've already verified in our production database the points you made:
- Is the "Manage Item cost per warehouse" selected in the Basic Initialization Screen?
YES
- Is the "Manage Inventory by Warehouse" ticked/checked in the "Inventory Data" tab of the "Item Master Data" screen?
YES
* I apologize for not have been able to give this information upfront.
Anyway, the database only has one warehouse at the moment.
I've checked the items, like the item in the screen shot above, and it does have an item cost.
Below is the screenshot of the sample item from my original post,
Thanks in advance!
Sean -
itunes wont open at all, error message : quicktime was not found .... please reinstall ... i did that but no luck this only seems to have happened since the 10.4 update, im on windows 7 ..
Can you start QuickTime on your computer?
You'll probably have to search for the Windows Installer Cleanup Utility and use it to remove QuickTime Player and iTunes. Then download and install the iTunes again. -
I was updating Firefox to the newest version 7.0.1 from version 6.0.2 I think it was, I clicked the restart Firefox button that always comes up after updating. It started updating and then Firefox never restarted like it was supposed to after it was done updating. I then tried to open Firefox and it told me "This application has failed to start because xul.dll was not found." I did have Firefox crash on maybe about 30 minutes or so earlier which bothered me because I have been using Firefox for years and never had it crash on me before but I didn't think much of it at the time it happened because I was able to go back onto Firefox and finish what I had been working on. A while later I checked for updates and updated. The first time I tried to update it didn't work though so I had to shutdown Firefox and reopen Firefox and start the update a second time. It was after the second time that when I tried to open Firefox I got that message about failing to start because xul.dll can't be found. I filed a crash report when my Firefox crashed. This would have been around 1am-2am in the morning that Firefox first crashed and then wouldn't allow me to open it after updating. I have a DELL laptop running the Windows XP operating system but the laptop is probably at least 6 or 7 years old. The laptop will no longer charge so I always have to have it plugged into an outlet. Both my laptop hard drive and my external hard drive give me messages that I am running out of disk space on my hard drive. I bought this laptop 6 or 7 years ago second hand so it could be even older. In short it's a piece of crap and it gives me all kinds of issues but I currently can't afford a new one, but I have never had any problems with Firefox and I use Firefox more than any other aspect of my laptop so it's really really bothering me. May you please help me fix it?
Unfortunately I tried that and it didn't work. Thanks for the help though. I tried to uninstall and it said I couldn't because the file is corrupt or something, but I think I finally got it uninstalled and/or deleted or whatever, but now I try to reinstall/download it again from the beginning and I can't. No matter what I do I can not get Firefox working again. No matter how many times I try to redownload it. Any other suggestions?
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