Cannot import AppModuleImpl class
Hi experts,
I'm developing Jdeveloper 11.1.2.2.0
Suddenly I got this error.
I had created Manage bean and import pakagename.AppModuleImpl and few other Impl classes there.
Suddenly it was prompted error that ,cannot import AppModuleImpl class.
I was wonder about this error because it worked fine before.
Could u pls advise me to solve this problem.
Charith
Hi,
what you try to do is accomplished by creating a dependency between the modle and the viewController project (see view controller project properties). As mentioned in the previous post, crossing boundaries between the model layer and the view controller layer is not good practices. If you need to access an AM method, expose it on the client interface and create a method binding so it can be accessed from and through the ADF binding layer.
Frank
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Cannot import Java classes to form
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I want to use the Persian Calendar from this web-site http://persiancalendar.sourceforge.net/.
I download the stuff and there are 2 JAR files.
I did this:
-- Put the JAR files in my E:\Ora_Dev_10g_R2\forms\java directory
-- Made an entry of these 2 in the E:\Ora_Dev_10g_R2\forms\server\formsweb.cfg file
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I agree with Abdetu, you should create your own thread for your question. However, to set an environment variable in UNIX you declare the variable and then export it. For example, in your default profile you could add the following:
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I am trying to do the sample contact walkthrough in FLEX
builder. For the Java Adapter.
http://livedocs.macromedia.com/flex/2/docs/wwhelp/wwhimpl/js/html/wwhelp.htm?href=00000138 .html
I cannot get any import statements to work for the java class
files. I have tried this using the FDS as a J2EE application
running in tomcat, I have tried with the standalone JRUN version of
the FDS app.
I have put the contact files everywhere I can think of, in
the server classes folder, in the project, in the default web
folder and nothing I try works. I have even setup the project to
compile on the server and I get nothing. Everytime, I get errors.
I did the tutorial from the JDJ magazine:
http://java.sys-con.com/read/210991.htm
I cant get that java connection to work either. Please
someone help me.
The flex code is below.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:Script>
<![CDATA[
import mx.data.DataService;
import mx.collections.ArrayCollection;
import samples.contact.Contact;
public var ds:DataService;
[Bindable]
public var contacts:ArrayCollection;
//public var contact:Contact;
]]>
</mx:Script>
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<mx:columns>
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<mx:DataGridColumn dataField="lastName" headerText="Last
Name"/>
</mx:columns>
</mx:DataGrid>
</mx:Application>Ken, thank you for replying, I have had absolutly nothing but
problems trying to get this 'simple' thing to work.
Here is my code.
In the remote-config.xml file, I have this code:
<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service"
class="flex.messaging.services.RemotingService"
messageTypes="flex.messaging.messages.RemotingMessage">
<adapters>
<adapter-definition id="java-object"
class="flex.messaging.services.remoting.adapters.JavaAdapter"
default="true"/>
</adapters>
<default-channels>
<channel ref="my-amf"/>
</default-channels>
<destination id="SimpleJava">
<properties>
<source>javaSamples.SimpleMath</source>
</properties>
</destination>
</service>
Here is my MXML file: (Called new.MXML)
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute">
<mx:RemoteObject id="math" destination="SimpleJava">
<mx:method name="doMath" concurrency="last"
result="fillTxt(event.result as int)"/>
</mx:RemoteObject>
<mx:Script>
<![CDATA[
import mx.rpc.events.ResultEvent
private function fillTxt(b: int):void{
txtResult.text = (String)
//comment
]]>
</mx:Script>
<mx:Panel x="10" y="24" width="250" height="200"
layout="absolute" title="Simple Math with Java">
<mx:Label x="10" y="10" text="Input Number to
Multiply:"/>
<mx:TextInput x="10" y="36" id="txtNumber"
maxChars="1"/>
<mx:Label x="10" y="126" id="txtResult"/>
<mx:Label x="10" y="100" text="Your Number will appear
below:"/>
<mx:Button x="10" y="66" label="Multiply by 2"
click="math.doMath(txtNumber.text)"/>
</mx:Panel>
</mx:Application>
Here is my SimpleJava.java file:
package javaSamples;
//import java.util.*;
* @author jsanders
public class SimpleMath {
public int doMath(String a){
int new_a = Integer.parseInt(a.trim());
int b = new_a * 2;
return b;
//changesd
Like I said I have had absolutly nothing but problems with
this. Yesterday, I was getting send failures, So I did some
reasearch found some folks who said that they had the same problem,
and they had to hard code the app name into the services-config.xml
file. The file used to have {context.root} in it, and that variable
was set to /flex, now I hardcoded this line into the my-amf channel
definition to get rid of the send failure error.
<channel-definition id="my-amf"
class="mx.messaging.channels.AMFChannel">
<endpoint uri="
http://{server.name}:{server.port}/flex/messagebroker/amf"
class="flex.messaging.endpoints.AMFEndpoint"/>
<properties>
<polling-enabled>false</polling-enabled>
</properties>
</channel-definition>
As you can see what should say:
http://{server.name}:{server.port}/{context.root}
Now says:
http://{server.name}:{server.port}/flex.
This was the only way I could get the send error to go away.
Now I worry that I might have broken something else. Since I
removed all references to {context.root} in that file.
{context.root} is defined in the flex-config.xml file, like
this:
<context-root>/flex</context-root>
I have tried it with or without the '/' in the value of the
context.root variable.
I have played with the remoting-config file, and I know that
I am accessing the destination.
I have played with the <source> option of the
destination, and I know that I am finding the class and making a
good connection.
I am using the JRUN install of FDS on my box, and yesterday
at the end of the day after getting the context.root situation
sorted out, I got a different error something like major.minor
versioning errors.
So the Java guys here at work told me that the JRUN version
packaged with FDS was 1.4, and I used 1.5 to compile my java class.
So I recompiled this morning with the 1.4 sdk. Now I dont get that
error about the major minor versioning anymore.
Now I get nothing. I use firefox, and all the browser tells
me is 'transferring data from localhost' Nothing else. It just sits
there and does nothing.
When I did the debug on it, I got into a loop on the
UIComponent.as file in the callLaterDispatcher(event:Event)
function.
Any clues what might be causing this new hang up. Basically
the machine just hangs. Is there a problem with the result from the
Method I am calling in the MXML? Did I do something wrong with the
Event as Int thing?
Again any help would be appreciated. -
Cannot import custom made java class
Hello
I wrote a java class say (Money.java) which compiled fine. When I was importing it to another class (Account.java), the folowing error message appears:
Account.java.1:'.' expected
import Money;(an errow pointing to ";")
I dont think the code is wrong, because when I cut and attach the Money class code to the front of the Account class it compiled successfully.... I am confused! I wrote the import command according to the text book as follows:
import Money;
public class Account
By the way, both the Money and Account classes are saved in the save folder... How come it wont let me import...
Looking forward for an early reply.
ThanksIn older versions of Java, it was possible to import classes from the default package using a statement like:
import Money;
This feature has been removed from Java as of version 1.5. You cannot import classes from the default package.
Note that if your other code (Account.java) is also in the default package, you do not need to import the class Money. Just remove the import statement.
If class Account is in a different package and you want to use class Money, then the only option you have is to put class Money in another package than the default (unnamed) package. -
Import a class cannot take effect until the restart of wls6.1
Hi all,
I am using Weblogic6.1,I knew that JSP,Servlet,EJB can be auto depolyed
without restart weblogic,but when I
import a class written by myself in JSP or Servlet£¬the modification of this
class cannot take effect until
the restart of weblogic server¡£Why? How can I solve it£¿
thanks in advance!Check that your classpath is not set up to this class when you start the
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parameters!
Hope it helps.
Pat
"jxc" <[email protected]> wrote in message
news:3bef34c3$[email protected]..
> Hi all,
> I am using Weblogic6.1,I knew that JSP,Servlet,EJB can be auto
depolyed
> without restart weblogic,but when I
> import a class written by myself in JSP or Servlet£¬the modification of
this
> class cannot take effect until
> the restart of weblogic server¡£Why? How can I solve it£¿
>
> thanks in advance!
>
>
>
>
>
-
Import a class cannot take effect until the restart of wls6.1,why?
Hi all,
I am using Weblogic6.1,I knew that JSP,Servlet,EJB can be auto depolyed
without restart weblogic,but when I
import a class written by myself in JSP or Servlet£¬the modification of this
class cannot take effect until
the restart of weblogic server¡£Why? How can I solve it£¿
thanks in advance!
Check that your classpath is not set up to this class when you start the
server and check the ProductionDeploymentMode to false in the starting
parameters!
Hope it helps.
Pat
"jxc" <[email protected]> wrote in message
news:3bef34c3$[email protected]..
> Hi all,
> I am using Weblogic6.1,I knew that JSP,Servlet,EJB can be auto
depolyed
> without restart weblogic,but when I
> import a class written by myself in JSP or Servlet£¬the modification of
this
> class cannot take effect until
> the restart of weblogic server¡£Why? How can I solve it£¿
>
> thanks in advance!
>
>
>
>
>
-
'Cannot Resolve Symbol' error when importing custom class
I get this error...
c:\mydocu~1\n307\auto.java:14: cannot resolve symbol
symbol: class Box
import Box;
^
when I try to compile auto.java, the applet that's supposed to import the class Box, which I built to be like a message box in VB. Here is the code for Box...
import java.awt.*;
import java.awt.event.*;
public class Box extends Window{
Label lblMsg = new Label();
Button cmdOk = new Button("OK");
Panel pnlSouth = new Panel();
EventHandler ehdlr=new EventHandler(this);
public Box(Frame parent){
super(parent);
setLayout(new BorderLayout());
add(lblMsg, BorderLayout.NORTH);
add(pnlSouth, BorderLayout.SOUTH);
pnlSouth.setLayout(new FlowLayout());
pnlSouth.add(cmdOk);
cmdOk.addActionListener(ehdlr);
this.addWindowListener(ehdlr);
public void speak(String msg){
lblMsg.setText(msg);
this.setLocation(200,200);
this.setSize(200,200);
this.setVisible(true);
private class EventHandler extends WindowAdapter
implements ActionListener{
Window theWindow;
public EventHandler(Window a){
theWindow=a;
public void actionPerformed(ActionEvent e){
theWindow.setVisible(false);
AND HERE IS THE CODE FOR AUTO...
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
import Box;
public class auto extends Applet implements ActionListener{
Panel pnlCenter=new Panel();
Panel pnlSouth=new Panel();
Panel pnlNorth=new Panel();
Panel pnlCenterleft=new Panel();
Panel pnlCenterright=new Panel();
Button cmdSubmit=new Button("Submit");
Button cmdNext=new Button("Next");
Button cmdPrev=new Button("Previous");
Label lblLoc=new Label("LOCATION:");
Label lblDate=new Label("DATE:");
Label lblMile=new Label("MILEAGE:");
Label lblCost=new Label("COST:");
Label lblDesc=new Label("DESCRIPTION:");
Label lblFind=new Label("FIND LOCATION:");
Label lblDisp=new Label();
TextField txtLoc=new TextField();
TextField txtDate=new TextField();
TextField txtMile=new TextField();
TextField txtCost=new TextField();
TextArea txtDesc=new TextArea();
TextField txtFind=new TextField();
Box bxOne = new Box((Frame(this).getParent()));
/*by declaring these four variables here, they are instance level, meaning they are
available to the whole applet*/
String textFile="auto.txt";
String list[] = new String[100];
String sort[] = new String[100];
int counter=0;
int count=0;
String currentLine="";
int i;
int sortcount;
public void init(){
this.setLayout(new BorderLayout());
this.add(pnlNorth, BorderLayout.NORTH);
this.add(pnlCenter, BorderLayout.CENTER);
this.add(pnlSouth, BorderLayout.SOUTH);
pnlNorth.setLayout(new FlowLayout());
pnlNorth.add(new Label("VIEW RECORDS"));
pnlCenter.setLayout(new GridLayout(1,2));
pnlCenter.add(pnlCenterleft);
pnlCenter.add(pnlCenterright);
pnlCenterleft.setLayout(new GridLayout(0,1));
pnlCenterleft.add(lblLoc);
pnlCenterleft.add(lblDate);
pnlCenterleft.add(lblMile);
pnlCenterleft.add(lblCost);
pnlCenterleft.add(lblDesc);
pnlCenterleft.add(lblFind);
pnlCenterright.setLayout(new GridLayout(0,1));
pnlCenterright.add(txtLoc);
pnlCenterright.add(txtDate);
pnlCenterright.add(txtMile);
pnlCenterright.add(txtCost);
pnlCenterright.add(txtDesc);
pnlCenterright.add(txtFind);
pnlSouth.setLayout(new FlowLayout());
pnlSouth.add(cmdPrev);
pnlSouth.add(lblDisp);
pnlSouth.add(cmdSubmit);
pnlSouth.add(cmdNext);
lblDisp.setText("0 of 0");
cmdPrev.addActionListener(this);
cmdNext.addActionListener(this);
cmdSubmit.addActionListener(this);
public void actionPerformed(ActionEvent e){
String command=e.getActionCommand();
if (command.equals("Next")){
if(txtLoc.getText().equals("")){
reader();
transfer();
writer();
bxOne.speak("Viewing all records");
}else{
if(counter<count-2){
counter++;
writer();
}else{
//don't move
} else if (command.equals("Previous")){
if(txtLoc.getText().equals("")){
//do nothing
}else{
if(counter>0){
counter--;
writer();
}else{
//don't move
} else {
txtLoc.setText("");
txtDate.setText("");
txtMile.setText("");
txtCost.setText("");
txtDesc.setText("");
reader();
sorter();
writer();
private void writer(){
StringTokenizer stCurrent=new StringTokenizer(sort[counter], "\t");
txtLoc.setText(stCurrent.nextToken());
txtDate.setText(stCurrent.nextToken());
txtMile.setText(stCurrent.nextToken());
txtCost.setText(stCurrent.nextToken());
txtDesc.setText(stCurrent.nextToken());
lblDisp.setText(String.valueOf(counter+1) + " of " + String.valueOf(count-1));
private void reader(){
try{
URL textURL=new URL(getDocumentBase(), textFile);
InputStream issIn=textURL.openStream();
InputStreamReader isrIn=new InputStreamReader(issIn);
BufferedReader brIn=new BufferedReader(isrIn);
while(currentLine!=null){
currentLine=brIn.readLine();
list[count]=currentLine;
count++;
}catch(MalformedURLException exc){
System.out.println("MalformedURLException Error");
}catch(IOException exc){
System.out.println("IOException Error");
}catch(NullPointerException exc){
System.out.println("NullPointerException Error");
private void transfer(){
for(i=0;i<count;i++){
sort=list[i];
private void sorter(){
sortcount=0;
String find=txtFind.getText();
System.out.println(String.valueOf(count));
for(i=0;i<count-1;i++){
StringTokenizer st=new StringTokenizer(list[i], "\t");
String next=st.nextToken();
if (find.equals(next)){
sort[sortcount]=list[i];
sortcount++;
count=sortcount+1;
Any help is greatly appreciated.
2Willis4Hi agian,
I looked closer at your code, I think if you play around with directories and paths, you'll get it, and I think also when you import, you have to have put the class in a package...? Maybe? Blind leading the blind here! So at the top of your box class you have to say something like
package org.blah.lala
and you have to have that directory structure for the class files org/blah/lala/Box.class
Does that make sense?
And then when you import you say:
import org.blah.lala.Box
(I think)
I cna only imagine that this 'help' I am giving you would be hilarious to a more experienced programmer!
Anyway, best of luck. -
Cannot convert type class java.lang.String to class oracle.jbo.domain.Clob
Cannot convert type class java.lang.String to class oracle.jbo.domain.ClobDomain.
Using ADF Business Components I have a JSFF page fragment with an ADF form based on a table with has a column of type CLOB. The data is retrieved from the database and displayed correctly but when any field is changed and submitted the above error occurs. I have just used the drag and drop technique to create the ADF form with a submit button, am I missing a step?
I am using the production release of Jdeveloper11GReproduced and filed bug# 7487124
The workaround is to add a custom converter class to your ViewController project like this
package oow2008.view;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;
import oracle.jbo.domain.ClobDomain;
import oracle.jbo.domain.DataCreationException;
public class ClobConverter implements Converter {
public Object getAsObject(FacesContext facesContext,
UIComponent uIComponent,
String string) {
try {
return string != null ? new ClobDomain(string) : null;
} catch (DataCreationException dce) {
dce.setAppendCodes(false);
FacesMessage fm =
new FacesMessage(FacesMessage.SEVERITY_ERROR,
"Invalid Clob Value",
dce.getMessage());
throw new ConverterException(fm);
public String getAsString(FacesContext facesContext,
UIComponent uIComponent,
Object object) {
return object != null ?
object.toString() :
null;
}then to register the converter in faces-config.xml like this
<faces-config version="1.2" xmlns="http://java.sun.com/xml/ns/javaee">
<application>
<default-render-kit-id>oracle.adf.rich</default-render-kit-id>
</application>
<converter>
<converter-id>clobConverter</converter-id>
<converter-class>oow2008.view.ClobConverter</converter-class>
</converter>
</faces-config>then reference this converter in the field for the ClobDomain value like this
<af:inputText value="#{bindings.Description.inputValue}"
label="#{bindings.Description.hints.label}"
required="#{bindings.Description.hints.mandatory}"
columns="40"
maximumLength="#{bindings.Description.hints.precision}"
shortDesc="#{bindings.Description.hints.tooltip}"
wrap="soft" rows="10">
<f:validator binding="#{bindings.Description.validator}"/>
<f:converter converterId="clobConverter"/>
</af:inputText> -
How to import a class, which is not in a package?
Hi all,
I have the following problem:
A class A is not in a package. In another class B, which is in a package (let's say package X) I want to use the class A. Without importing the class A, I get the error "Cannot resolve symbol".
Using the import statement import A; gives the error ". expected".
How can I import that class?
Best wishes to all ...
Heiko> I have the following problem:
A class A is not in a package. In another class B,
which is in a package (let's say package X) I want to
use the class A. Without importing the class A, I get
the error "Cannot resolve symbol".
I think not putting a class in a package is a bad practice. Avoid that. -
PLEASE HELP: cannot resolve symbol class
it's showing me the error on the following lines 7 and 9
it says cannot resolve symbol class Name and cannot resolve symbol class Phone
I also have a package name addressBook and it contains two files Entry.java and Address.java
Here is the code:
import java.io.*;
import addressBook.*;
public class AddressDr
public static void main(String[] args)throws IOException
Name name;
Address address;
Phone phone;
Entry entry;
String first, last, middle, street, city, state, zip;
int areaCode, number;
BufferedReader in;
in=new BufferedReader(new InputStreamReader(System.in));
PrintWriter outFile;
outFile=new PrintWriter(new FileWriter("Entries"));
System.out.println("Quit entered fot the first name ends the " + "application.");
System.out.print("Enter first name: ");
first=in.readLine();
while (first.compareTo("Quit") !=0)
System.out.print("Enter last name: ");
last=in.readLine();
System.out.print("Enter middle name: ");
middle=in.readLine();
name=new Name(first, last, middle);
System.out.print("Enter street address: ");
street=in.readLine();
System.out.print("Enter city: ");
city=in.readLine();
System.out.print("Enter state: ");
state=in.readLine();
System.out.print("Enter ZIP code: ");
zip=in.readLine();
address=new Address(street, city, state, zip);
System.out.print("Enter areaCode: ");
areaCode = Integer.parseInt(in.readLine());
System.out.print("Enter number: ");
number=Integer.parseInt(in.readLine());
phone=new Phone(areaCode, number);
entry= new Entry(name, address, phone);
entry.writeToFile(outFile);
System.out.print("Enter first name: ");
first=in.readLine();
outFile.close();
}OK. Here is how I did it.
I have AddressDr which is Address driver.
I have two files Address and Entry which in package addressBook.
AddressDr:
import java.io.*;
import addressBook.*;
public class AddressDr
public static void main(String[] args)throws IOException
Name name;
Address address;
Phone phone;
Entry entry;
String first, last, middle, street, city, state, zip;
int areaCode, number;
BufferedReader in;
in=new BufferedReader(new InputStreamReader(System.in));
PrintWriter outFile;
outFile=new PrintWriter(new FileWriter("Entries"));
System.out.println("Quit entered fot the first name ends the " + "application.");
System.out.print("Enter first name: ");
first=in.readLine();
while (first.compareTo("Quit") !=0)
System.out.print("Enter last name: ");
last=in.readLine();
System.out.print("Enter middle name: ");
middle=in.readLine();
name=new Name(first, last, middle);
System.out.print("Enter street address: ");
street=in.readLine();
System.out.print("Enter city: ");
city=in.readLine();
System.out.print("Enter state: ");
state=in.readLine();
System.out.print("Enter ZIP code: ");
zip=in.readLine();
address=new Address(street, city, state, zip);
System.out.print("Enter areaCode: ");
areaCode = Integer.parseInt(in.readLine());
System.out.print("Enter number: ");
number=Integer.parseInt(in.readLine());
phone=new Phone(areaCode, number);
entry= new Entry(name, address, phone);
entry.writeToFile(outFile);
System.out.print("Enter first name: ");
first=in.readLine();
outFile.close();
Entry:
package addressBook;
import java.io.*;
public class Entry
Name name;
Address address;
Phone phone;
public Entry(Name newName, Address newAddress, Phone phoneNumber)
name = newName;
address = newAddress;
phone = phoneNumber;
public Name knowName()
return name;
public Address knowAddress()
return address;
public Phone knowPhone()
return phone;
public void writeToFile(PrintWriter outFile)
outFile.println(name.knowFirstName());
outFile.println(name.knowLastName());
outFile.println(name.knowMiddleName());
oufFile.println(address.knowStreet());
outFile.println(address.knowState());
outFile.println(address.knowCity());
outFile.println(address.knowZip());
outFile.println(phone.knowAreaCode());
outFile.println(phone.knowDigits());
Address:
package addressBook;
public class Address
String street;
String city;
String state;
String zipCode;
public Address(String newStreet, String newCity, String newState, String zip)
street=newStreet;
city=newCity;
state=newState;
zipCode=zip;
public String knowStreet()
return street;
public String knowCity()
return city;
public String knowState()
return state;
public String knowZip()
return zipCode;
} -
Cannot find symbol class Usernamebean
hi i am new in j2ee
can some body help to give the solution.
i am always thankfull to everybody
i have a servlet where i am calling a bean of same package but servlet not compile giving that error
cannot find symbol class Usernamebean
servlet code
package ecomm; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*; import java.io.*; import java.util.*; import bengalcom.*; public class Loginservelet extends HttpServlet { public void doGet(HttpServletRequest req,HttpServletResponse res) throws ServletException,IOException { try { String accnum=req.getParameter("username"); String pinnum=req.getParameter("password"); try { Class.forName("com.mysql.jdbc.Driver"); Connection dbcon=DriverManager.getConnection("jdbc:mysql://localhost/ecomm","root",""); PreparedStatement s = dbcon.prepareStatement("select * from vendordetails where email = ? and password = ? and blocking='No' "); s.setString(1,accnum); s.setString(2,pinnum); ResultSet result=s.executeQuery(); boolean rowfound=false; rowfound=result.next(); if(rowfound==true) { String vname=result.getString("fname"); String vid=result.getString("vid"); String email=result.getString("email"); UsernameBean nameBean =new UsernameBean(); nameBean.setFirstName(accnum); HttpSession session = req.getSession(true); session.setAttribute("vname",vname); session.setAttribute("vid",vid); session.setAttribute("email",email); RequestDispatcher dispatcher=getServletContext().getRequestDispatcher("/earea.jsp?vname=vname&vid=vid&email=email"); dispatcher.forward(req,res); dbcon.close(); } else{ RequestDispatcher dispatcher=getServletContext().getRequestDispatcher("/eblock.jsp"); dispatcher.forward(req,res); } } catch(ClassNotFoundException e) { } } catch(SQLException e) { System.out.println(e.toString()); } } public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { doGet(req, res); } }Hi,
java is case sensitive, Check the case in class name.
Regards,
Ram -
Cannot resolve symbol class graphics
does anyone know what the error
cannot resolve symbol class graphics means?
with this code i can't seem to call the graphics method to draw the line....any reason why?
import javax.swing.*;
import java.*;
public class LineDraw extends JFrame {
public static void main(String[] args) {
LineDraw ld = new LineDraw();
ld.setSize(500,500);
ld.setVisible(true);
ld.enterVariables();
public void init(){
private int x1;
private int x2;
private int y1;
private int y2;
public void paint(Graphics g) {
g.GetGraphics(g);
super.paintComponent(g);
g.drawLine(x1, y1, x2, y2);
public void enterVariables() {
x1 = Integer.parseInt(JOptionPane.showInputDialog("Enter x1:"));
y1 = Integer.parseInt(JOptionPane.showInputDialog("Enter y1:"));
x2 = Integer.parseInt(JOptionPane.showInputDialog("Enter x2:"));
y2 = Integer.parseInt(JOptionPane.showInputDialog("Enter y2:"));
repaint();
}well the exact error message is ...by the way now that i think about it
if the graphics method shoudl not be part of the JFrame class then what method would i use to draw 2D Graphics?
--------------------Configuration: <Default>--------------------
C:\Documents and Settings\c1s5\My Documents\LineDraw.java:21: cannot resolve symbol
symbol : class Graphics
location: class LineDraw
public void paint(Graphics g)
^
1 error
Process completed.
and the exact code is
import javax.swing.*;
import java.*;
public class LineDraw extends JFrame {
public static void main(String[] args) {
LineDraw ld = new LineDraw();
ld.setSize(1024,500);
ld.setVisible(true);
ld.enterVariables();
private int x1;
private int x2;
private int y1;
private int y2;
public void paint(Graphics g)
super.paintComponent(g);
g.drawLine(x1, y1, x2, y2);
public void enterVariables() {
x1 = Integer.parseInt(JOptionPane.showInputDialog("Enter x1:"));
y1 = Integer.parseInt(JOptionPane.showInputDialog("Enter y1:"));
x2 = Integer.parseInt(JOptionPane.showInputDialog("Enter x2:"));
y2 = Integer.parseInt(JOptionPane.showInputDialog("Enter y2:"));
repaint();
} -
Cannot reslove symbol class Date
I am trying to get a clock to show the time in my program. However, when I try to compile the program a "cannot resolve symbol class Date" error appears. I can't figure out where the problem in my program is. Here is my source code. I would appreciate any help.
import javax.swing.*;
import java.io.*;
import java.lang.*;
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
//import java.util.*;
import java.math.*;
public class store
public static void main(String[] args)
String dataInput;
dataInput = JOptionPane.showInputDialog(null, "Input item data: ");
JOptionPane.showMessageDialog(null, "" + dataInput);
EasyReader console = new EasyReader();
int i, j, k, inum, icom, min, nswaps; inum = 0; boolean swap = false;
double num[] = new double[100]; double dsum, T;
do
System.out.println(); System.out.println("Command Menu"); System.out.println();
System.out.println("1 = Display the data");
System.out.println("2 = Bubble Sort the numbers");
System.out.println("3 = Selection Sort the numbers");
System.out.println("4 = Insertion Sort the numbers");
System.out.println("5 = Binary Search for a number");
System.out.println("0 = Exit the program"); System.out.println();
System.out.print("Enter Command - ");
icom = console.readInt(); System.out.println();
switch (icom)
case 1: // Display the data
Display(inum, num);
break;
case 2: // Bubble sort
nswaps = 0;
for (i = 0; i < (inum-1); i++ )
for (j = (i+1); j < inum; j++)
if (num[i] > num[j])
T = num;
num[i] = num[j];
num[j] = T;
nswaps++;
System.out.println("The number of swaps was - " + nswaps);
Display(inum, num);
break;
case 3: // Selection sort
nswaps = 0;
for (i = 0; i < inum - 1; i++) {
min = i; swap = false;
for (j = i + 1; j < inum; j++)
if (num[j] < num[min]) { min = j; swap = true; }
if (swap) {T = num[min];
num[min] = num[i];
num[i] = T;
nswaps++;}
System.out.println("The number of swaps was - " + nswaps);
Display(inum, num);
break;
case 4: // Selection sort
nswaps = 0;
for (i = 1; i < inum; i++)
j = i; T = num[i];
while ((j > 0) && (T < num[j-1]))
num[j] = num[j-1]; j--; nswaps++;
num[j] = T; nswaps++;
System.out.println("The number of swaps was - " + nswaps);
Display(inum, num);
break;
case 5: // Binary Search
System.out.println("Your numbers will be sorted first");
System.out.println();
for (i = 1; i < inum; i++)
j = i; T = num[i];
while ((j > 0) && (T < num[j-1]))
num[j] = num[j-1]; j--;
num[j] = T;
System.out.print("Enter the number to locate - ");
T = console.readDouble(); nswaps = 0; System.out.println();
int left = 0, right = inum, middle; k = -1;
while (left <= right)
middle = (left + right) / 2;
if (T > num[middle]) {left = middle + 1; nswaps++;}
else if (T < num[middle]) {right = middle - 1; nswaps++;}
else { k = middle; break; }
if (k == -1) System.out.println("Your number was not located in the array");
else System.out.println("Your number " + T + " is in position " + (k+1));
System.out.println();
System.out.println(nswaps + " comparisons were needed to search for your number");
Display(inum, num);
break;
} while (icom != 0);
public static void Display(int inum, double num[])
{ int k;
System.out.println();
System.out.println("");
System.out.println();
for (k = 0; k < inum; k++)
System.out.println((k+1) + " - " + num[k]);
return;
class Clock extends Thread
//A Canvas that will display the current time on the calculator
Canvas Time;
//A Date object that will access the current time
private Date now;
//A string to hold the current time
private String currentTime;
//The constructor for Clock, accepting a Label as an argument
public Clock(Canvas _Time)
Time = Time; //Time is passed by reference, so Time
//now refers to the same Canvas
start(); //start this thread
//The overriden run method of this thread
public void run()
//while this thread exists
while (true)
try
draw_clock(); //calls the draw_clock method
sleep(1000); //puts this thread to sleep for one
//second
//catches an InterruptedException that the sleep() method might throw
catch (InterruptedException e) { suspend(); }
//catches a NullPointerException and suspends the thread if one occurs
catch (NullPointerException e) { suspend(); }
//A method to draw the current time onto the Time Canvas on the applet
public void draw_clock()
try
//Obtains the Graphics object from the Canvas Time so that it can
//be manipulated directly
Graphics g = Time.getGraphics();
g.setColor(Color.gray); //sets the color of the Graphics object
//to gray for the rectangle background
g.fillRect(0,0,165,25); //fills the Canvas area with a rectangle
//starting at 0,0 coordinates of the Canvas
//and extending to the length and width
g.setColor(Color.orange); //sets the color of the Graphics object
//to orange for the text color
get_the_time(); //calls the get_the_time() method
//calls the drawString method of the Graphics object g, which will
//draw a string to the screen
//Accepts a string and two integers to represent the coordinates
g.drawString("Current Time - " + currentTime, 0, 17);
//catches a NullPointerException and suspends the thread if one occurs
catch (NullPointerException e) { suspend(); }
//A method to obtain the current time, accurate to the second
public void get_the_time()
//creates a new Date object for "now" every time this is called
now = new Date( );
//integers to hold the hours, minutes and seconds of the current time
int a = now.getHours();
int b = now.getMinutes();
int c = now.getSeconds();
if (a == 0) a = 12; //if hours are zero, set them to twelve
if (a > 12) a = a -12; //if hours are greater than twelve, make a
//conversion to civilian time, as opposed to
//24-hour time
if ( a < 10) //if hours are less than 10
//sets the currentTime string to 0, appends a's value and a
//colon
currentTime = "0" + a + ":" ;
else
//otherwise set currentTime string to "a", append a colon
currentTime = a +":";
if (b < 10) //if minutes are less than ten
//append a zero to string currentTime, then append "b" and a colon
currentTime = currentTime + "0" + b + ":" ;
else
//otherwise append "b" and a colon to currentTime string
currentTime = currentTime + b + ":" ;
if (c < 10) //if seconds are less than ten
//append a zero to string currentTime, then append "c" and a colon
currentTime = currentTime + "0" + c ;
else
//otherwise append "c" to currentTime string
currentTime = currentTime + c;
} //end of the Clock classWow.
1) Please in future use the code tags to format code you post so that it doesn't think you have italics in your code and render it largely1 unreadable. Read this
http://forum.java.sun.com/help.jspa?sec=formatting
2) You commented out the import of java.util which is the problem you are complaining about.
3) Are you planning to stick all the code you ever write into the one source file? Why is all this stuff rammed together. Yoinks. -
"cannot find symbol : class Scanner" error message
I have an error message that says:
"cannot find symbol : class Scanner"
I tried typing at the top of the program
import java.util.Scanner;but I still have the same error message.
What should I do ?
Thank you in advancehttp://java.sun.com/j2se/1.5.0/docs/api/java/util/Scanner.html
Since:
1.5
look at the javadoc, it says since 1.5 so it's not there in earlier versions.
just a guess -
Cannot resolve symbol class Scanner (Error)
For whatever reason I get the error message "cannot resolve symbol class Scanner" when trying to run this:
import java.io.*;
import java.util.*;
public class NameReversal
public static void main(String args[])
System.out.print("Enter your name: ");
Scanner Reader = new Scanner(System.in);
String first = Reader.next();
String finl = Reader.next();
int z = first.length();
int v = finl.length();
int y = z-1;
int f = y-1;
for(int i = y; i>=0; z--)
System.out.print(first.charAt(1));
System.out.print(" ");
for(int p = f; p >= 0; p--)
System.out.println(finl.charAt(p));
}The Scanner class is in the JDK version 1.5 or later. You must be using an earlier version.
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