Cannot resolve symbol : import

I've never had this type of error while doing a compile before.
Does this mean that java doesn't know where to find my org.nipr.gateway_ws.utils.ConnectionPoolSingleton?
    [javac] Compiling 1 source file to C:\Data\StateProcessWebService\Server\build\war\WEB-INF\classes
    [javac] C:\Data\StateProcessWebService\Server\src\org\nipr\StateProcess\impl\StateProcessImpl.java:20: cannot resolve symbol
    [javac] symbol : class ConnectionPoolSingleton
    [javac] location: package utils
    [javac] import org.nipr.gateway_ws.utils.ConnectionPoolSingleton;
    [javac] ^
    [javac] C:\Data\StateProcessWebService\Server\src\org\nipr\StateProcess\impl\StateProcessImpl.java:265: cannot resolve symbol
    [javac] symbol : variable ConnectionPoolSingleton
    [javac] location: class org.nipr.StateProcess.impl.StateProcessImpl
    [javac] ConnectionPooler pool = ConnectionPoolSingleton.instance( "stateProcess" );
    [javac] ^

Cool. Thanks.
I freaked when I first saw that. I added the missing java file and it compiled just fine.

Similar Messages

Cannot resolve symbol error even with class imported

Hi
I'm trying to print out a java.version system property but keep getting a
cannot resolve symbol error
symbol: class getProperty
location: class java.lang.System
I've looked at the API and getProperty() is a method of lang.System
Can anyone throw any light?
thanks
import java.lang.System;
class PropertiesTest {
    public static void main(String[] args) {
            String v = new System.getProperty("java.version");
             System.out.println(v);
}

Thanks Jos
It compiles but I now get a runtime error
Exception in thread "main"
java.lang.NoClassDefFoundError:PropertiesTest
What do you reckon is the problem?
thanks
java -cp .;<any other directories or jars>
YourClassNameYou get a NoClassDefFoundError message because the
JVM (Java Virtual Machine) can't find your class. The
way to remedy this is to ensure that your class is
included in the classpath. The example assumes that
you are in the same directory as the class you're
trying to run.I know it's a bad habit but I've put this file (PropertiesTest.java) and the compiled class (PropertiesTest.class) both in my bin folder which contains the javac compiler

Import javax.ejb.EJBHome; cannot resolve symbol

Hi i wonder if anyone can help me. I have read alot of the posts regarding this issue and have tried everything to do with the paths and environmental variables and even reinstalled everything.
import javax.ejb.EJBHome; cannot resolve symbol
This is the problem i keep getting and here are the paths that i set:
SET PATH=c:\j2sdkee1.3\bin;c:\jdk1.3.1_01\bin;c:\jakarta-ant-1.3\bin
SET ANT_HOME=c:\jakarta-ant-1.3
SET JAVA_HOME=c:\jdk1.3.1_01
SET J2EE_HOME=c:\j2sdkee1.3
SET CLASSPATH=c:\j2sdkee1.3\lib\j2ee.jar;c:\jakarta-ant-1.3\lib\ant.jar;c:\jdk1.3.1_01\lib\tools.jar
What am i doing wrong???

Im not sure, everything looks ok to me, but here is what i tried:
I wrote this little test class, and compiled it
import javax.ejb.EJBHome;
public class test
public test()
I got the same error you did (or similar)
D:\>javac test.java
test.java:1: package javax.ejb does not exist
import javax.ejb.EJBHome;
^
1 error
then I added the j2ee.jar to my classpath and everything worked fine.
here are my env vars:
JAVA_HOME=d:\dev\jdk
J2EE_HOME=d:\dev\j2sdkee
CLASSPATH=...;%J2EE_HOME%\lib\j2ee.jar
If I were you I would double check all the paths you have set up then try a simple case like the one above. If your running NT/2000 make sure the JAVA_HOME, J2EE_HOME and CLASSPATH are system variables not user variables. Another thing you can try is adding the j2ee.jar to the classpath with the -classpath compiler switch.
javac -classpath %CLASSPATH%;d:\dev\j2sdkee\lib\j2ee.jar test.java
Other than those things I'm not sure
Good Luck

'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.
2Willis4

Hi 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 resolve symbol" error when importing a package

I'm new to Java and have been trying to make use of a toolikt which uses an imported package. Basically my problem is that I've been trying to compile a file called CookBook.java which contains the following import statements at the top of the file:
package gate;
import java.util.*;
import java.net.*;
import java.io.*;
import junit.framework.*;
import gate.*;
import gate.util.*;
import gate.creole.*;
import gate.creole.nerc.*;
I then compile this using the following command line:
/cygdrive/c/jdk1.3.1_01/bin/javac.exe      \
     -classpath "C:\cygwin\home\stevens1\gate_src\gate\build\gate.jar" \
     -extdirs "C:\cygwin\home\stevens1\gate_src\gate\lib\ext"     \
     -d . CookBook.java
(The extdirs command is required, acording to the manual, because the toolkit is implemented as two files for security reasons: gate.jar and guk.jar) These two flags should point to all the .jar files required by the application.
However, that command produces the following errors:
CookBook.java:140: cannot resolve symbol
symbol : method assertTrue (java.lang.String,boolean)
location: class gate.CookBook
assertTrue(
^
CookBook.java:146: cannot resolve symbol
symbol : variable GateConstants
location: class gate.CookBook
GateConstants.ORIGINAL_MARKUPS_ANNOT_SET_NAME);
^
CookBook.java:152: cannot resolve symbol
symbol : method assertTrue (java.lang.String,boolean)
location: class gate.CookBook
assertTrue(
^
One thing I've not been clear on is whether the files (CookBook.java) need to be in a directory with a special name. I've tried playing about with different ones but without much success.
Any suggestions to help a completely confused Java rookie would really be apreciated!
thanks in advance
mark

I then compile this using the following command line:
/cygdrive/c/jdk1.3.1_01/bin/javac.exe \
-classpath "C:\cygwin\home\stevens\gate_src\gate\build\gate.jar" \
-extdirs "C:\cygwin\home\stevens1\gate_src\gate\lib\ext" \
-d . CookBook.javaThere are a couple of issues with your compile...
Most notably, by setting the classpath to your build jar, you are compiling against old classes. If you set your classpath rather to the base of your package hierarchy, then javac will to some degree review and recompile dependencies, against your current source files. If you specify a target directory with -d, class files will be examined in this location if they aren't in the class path (And their source file is not in the compile-path)
Also, if you are compiling packages, I've found a good practice to be to compile from the base of the package structure, so your command will be more likejavac \
-classpath . \
-extdirs "C:\cygwin\home\stevens1\gate_src\gate\lib\ext" \
gate\\CookBook.javaIt seems to make it easier for the compiler to 'correctly' look up dependencies.
Hope that helps, at least a little,
-Troy

Import java.util.Formatter - cannot resolve symbol

I use j2sdk1.4.2_04
when I try to compile my program using Formatter, it response error "cannot resolve symbol"
Pls help!

Where did you get this java.util.Formatter from? If you check the official 1.4.2 API for Java, that class does not exisit! However, java.util.logging.Formatter, does exisit...
http://java.sun.com/j2se/1.4.2/docs/api/
If you ment: java.util.logging.Formatter have you checked the API to make sure you are using it correctly???
HTH.

Getting error message Cannot Resolve Symbol when trying to compile a class

Hello All -
I am getting an error message cannot resolve symbol while trying to compile a java class that calls another java class in the same package. The called class compiles fine, but the calling class generates
the following error message:
D:\Apache Tomcat 4.0\webapps\examples\WEB-INF\classes\cal>javac
ConnectionPool.java
ConnectionPool.java:158: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
private void addConnection(PooledConnection value) {
^
ConnectionPool.java:144: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
PooledConnection pcon = new PooledConnection(con);
^
ConnectionPool.java:144: cannot resolve symbol
symbol : class PooledConnection
location: class cal.ConnectionPool
PooledConnection pcon = new PooledConnection(con);
The code is listed as follows for PooledConnection.java (it compiles fine)
package cal;
import java.sql.*;
public class PooledConnection {
// Real JDBC Connection
private Connection connection = null;
// boolean flag used to determine if connection is in use
private boolean inuse = false;
// Constructor that takes the passed in JDBC Connection
// and stores it in the connection attribute.
public PooledConnection(Connection value) {
if ( value != null ) {
connection = value;
// Returns a reference to the JDBC Connection
public Connection getConnection() {
// get the JDBC Connection
return connection;
// Set the status of the PooledConnection.
public void setInUse(boolean value) {
inuse = value;
// Returns the current status of the PooledConnection.
public boolean inUse() {
return inuse;
// Close the real JDBC Connection
public void close() {
try {
connection.close();
catch (SQLException sqle) {
System.err.println(sqle.getMessage());
Now the code for ConnectionPool.java class that gives the cannot
resolve symbol error
package cal;
import java.sql.*;
import java.util.*;
public class ConnectionPool {
// JDBC Driver Name
private String driver = null;
// URL of database
private String url = null;
// Initial number of connections.
private int size = 0;
// Username
private String username = new String("");
// Password
private String password = new String("");
// Vector of JDBC Connections
private Vector pool = null;
public ConnectionPool() {
// Set the value of the JDBC Driver
public void setDriver(String value) {
if ( value != null ) {
driver = value;
// Get the value of the JDBC Driver
public String getDriver() {
return driver;
// Set the URL Pointing to the Datasource
public void setURL(String value ) {
if ( value != null ) {
url = value;
// Get the URL Pointing to the Datasource
public String getURL() {
return url;
// Set the initial number of connections
public void setSize(int value) {
if ( value > 1 ) {
size = value;
// Get the initial number of connections
public int getSize() {
return size;
// Set the username
public void setUsername(String value) {
if ( value != null ) {
username = value;
// Get the username
public String getUserName() {
return username;
// Set the password
public void setPassword(String value) {
if ( value != null ) {
password = value;
// Get the password
public String getPassword() {
return password;
// Creates and returns a connection
private Connection createConnection() throws Exception {
Connection con = null;
// Create a Connection
con = DriverManager.getConnection(url,
username, password);
return con;
// Initialize the pool
public synchronized void initializePool() throws Exception {
// Check our initial values
if ( driver == null ) {
throw new Exception("No Driver Name Specified!");
if ( url == null ) {
throw new Exception("No URL Specified!");
if ( size < 1 ) {
throw new Exception("Pool size is less than 1!");
// Create the Connections
try {
// Load the Driver class file
Class.forName(driver);
// Create Connections based on the size member
for ( int x = 0; x < size; x++ ) {
Connection con = createConnection();
if ( con != null ) {
// Create a PooledConnection to encapsulate the
// real JDBC Connection
PooledConnection pcon = new PooledConnection(con);
// Add the Connection to the pool.
addConnection(pcon);
catch (Exception e) {
System.err.println(e.getMessage());
throw new Exception(e.getMessage());
// Adds the PooledConnection to the pool
private void addConnection(PooledConnection value) {
// If the pool is null, create a new vector
// with the initial size of "size"
if ( pool == null ) {
pool = new Vector(size);
// Add the PooledConnection Object to the vector
pool.addElement(value);
public synchronized void releaseConnection(Connection con) {
// find the PooledConnection Object
for ( int x = 0; x < pool.size(); x++ ) {
PooledConnection pcon =
(PooledConnection)pool.elementAt(x);
// Check for correct Connection
if ( pcon.getConnection() == con ) {
System.err.println("Releasing Connection " + x);
// Set its inuse attribute to false, which
// releases it for use
pcon.setInUse(false);
break;
// Find an available connection
public synchronized Connection getConnection()
throws Exception {
PooledConnection pcon = null;
// find a connection not in use
for ( int x = 0; x < pool.size(); x++ ) {
pcon = (PooledConnection)pool.elementAt(x);
// Check to see if the Connection is in use
if ( pcon.inUse() == false ) {
// Mark it as in use
pcon.setInUse(true);
// return the JDBC Connection stored in the
// PooledConnection object
return pcon.getConnection();
// Could not find a free connection,
// create and add a new one
try {
// Create a new JDBC Connection
Connection con = createConnection();
// Create a new PooledConnection, passing it the JDBC
// Connection
pcon = new PooledConnection(con);
// Mark the connection as in use
pcon.setInUse(true);
// Add the new PooledConnection object to the pool
pool.addElement(pcon);
catch (Exception e) {
System.err.println(e.getMessage());
throw new Exception(e.getMessage());
// return the new Connection
return pcon.getConnection();
// When shutting down the pool, you need to first empty it.
public synchronized void emptyPool() {
// Iterate over the entire pool closing the
// JDBC Connections.
for ( int x = 0; x < pool.size(); x++ ) {
System.err.println("Closing JDBC Connection " + x);
PooledConnection pcon =
(PooledConnection)pool.elementAt(x);
// If the PooledConnection is not in use, close it
if ( pcon.inUse() == false ) {
pcon.close();
else {
// If it is still in use, sleep for 30 seconds and
// force close.
try {
java.lang.Thread.sleep(30000);
pcon.close();
catch (InterruptedException ie) {
System.err.println(ie.getMessage());
I am using Sun JDK Version 1.3.0_02" and Apache/Tomcat 4.0. Both the calling and the called class are in the same directory.
Any help would be greatly appreciated.
tnx..
addi

Is ConnectionPool in this "cal" package as well as PooledConnection? From the directory you are compiling from it appears that it is. If it is, then you are compiling it incorrectly. To compile ConnectionPool (and PooledConnection similarly), you must change the current directory to the one that contains cal and type
javac cal/ConnectionPool.

"cannot resolve symbol" in a Timer !!!Please Help!!!

I am doing a program for a class which involves timers. I am using JCreator and when i try to construct a new timer, the compiler points to the "new" in the line:
Timer T1=new Timer(interval, ActionListener);
^
This is what it looks like and the error reads: cannot resolve symbol; constructor Timer.
please tell me if yiou have any information or suggestions as to how this error might be remedied.

Sure, here it is:
import java.awt.event.*;
import javax.swing.Timer;
import javax.swing.JOptionPane;
import java.util.*;
interface ActionListener
     void actionPerformed(ActionEvent event);
class Ploid
     public static void main(String[] args)
          class Car implements ActionListener
               int mpg=30;
               int mph=35;
               int gtank=20;
               int interval;
               int changer;
               int totalmiles;
               Car(int x)
                    interval=x;
               public void actionPerformed(ActionEvent event)
                    for(int c=0;c<(interval/1000);c++)
                         totalmiles=totalmiles+mph;
                    int hyt=mpg*gtank;
                    if(totalmiles>hyt)
                         int y=totalmiles-hyt;
                         totalmiles=totalmiles-y;
                         System.out.println(totalmiles);
                    else
                         System.out.println(totalmiles);
class SUV implements ActionListener
     int mpg=15;
     int mph=55;
     int gtank=30;
     int interval;
     int changer;
     int totalmiles;
     SUV(int x)
          interval=x;
          public void actionPerformed(ActionEvent event)
               for(int c=0;c<(interval/1000);c++)
                    totalmiles=totalmiles+mph;
               int hyt=mpg*gtank;
               if(totalmiles>hyt)
                    int y=totalmiles-hyt;
                    totalmiles=totalmiles-y;
                    System.out.println(totalmiles);
               else
                    System.out.println(totalmiles);
class Semi implements ActionListener
     int mpg=60;
     int mph=80;
     int gtank=50;
     int interval;
     int changer;
     int totalmiles;
     Semi(int x)
          interval=x;
     public void actionPerformed(ActionEvent event)
          for(int c=0;c<(interval/1000);c++)
               totalmiles=totalmiles+mph;
          int hyt=mpg*gtank;
          if(totalmiles>hyt)
               int y=totalmiles-hyt;
               totalmiles=totalmiles-y;
               System.out.println(totalmiles);
          else
               System.out.println(totalmiles);
          String flag="y";
          String trav=JOptionPane.showInputDialog("How long do you want to drive?(1000=1 hour)");
          int t1=Integer.parseInt(trav);
          Car listen=new Car(t1);
          SUV listener2=new SUV(t1);
          Semi listener3=new Semi(t1);
          final int t2=t1/1000;
          final int t3=t1/t2;
          ActionListener listener=null;
          Timer T1=new Timer(t3, listener);
          Timer T2=new Timer(t3, listener);
          Timer T3=new Timer(t3, listener);
          while(flag.equals("y"))
               T1.start();
               T2.start();
               T3.start();
               String g=JOptionPane.showInputDialog("Do you want to drive again?");
               if((g.equals("y"))||(g.equals("Y")))
                    System.out.println("Let's Drive!");
               else
                    flag=g;
               System.exit(0);
}Here is the errors:
[errors]
A:\Ploid2.java:116: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
          Timer T1=new Timer(t3, listener);
^
A:\Ploid2.java:117: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
          Timer T2=new Timer(t3, listener);
^
A:\Ploid2.java:118: cannot resolve symbol
symbol : constructor Timer (int,ActionListener)
location: class javax.swing.Timer
          Timer T3=new Timer(t3, listener);
^
3 errors
Process completed.
[errors]
****There is the source code and the errors the compiler returns. That should be more help.****

Class error - cannot resolve symbol "MyDocumentListener"

Hello,
this is a groaner I'm sure, but I don't see the problem.
Newbie-itis probably ...
I'm not concerned with what the class does, but it would be nice for the silly thing to compile!
What the heck am I missing for "MyDocumentListener" ?
C:\divelog>javac -classpath C:\ CenterPanel.java
CenterPanel.java:53: cannot resolve symbol
symbol : class MyDocumentListener
location: class divelog.CenterPanel
MyDocumentListener myDocumentListener = new MyDocumentListener(); // define the listener class
^
CenterPanel.java:53: cannot resolve symbol
symbol : class MyDocumentListener
location: class divelog.CenterPanel
MyDocumentListener myDocumentListener = new MyDocumentListener(); // define the listener class
^
2 errors
package divelog;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.lang.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.filechooser.*;
import javax.swing.text.*;
public class CenterPanel extends JPanel implements ActionListener
{ // Opens class
static private final String newline = "\n";
private JTextArea comments;
private JScrollPane scrollpane;
private JButton saveButton, openButton;
private JLabel whiteshark;
private Box box;
private BufferedReader br ;
private String str;
private JTextArea instruct;
private File defaultDirectory = new File("C://divelog");
private File fileDirectory = null;
private File currentFile= null;
public CenterPanel()
{ // open constructor CenterPanel
setBackground(Color.white);
comments = new JTextArea("Enter comments, such as " +
"location, water conditions, sea life you observed," +
" and problems you may have encountered.", 15, 10);
comments.setLineWrap(true);
comments.setWrapStyleWord(true);
comments.setEditable(true);
comments.setFont(new Font("Times-Roman", Font.PLAIN, 14));
// add a document listener for changes to the text,
// query before opening a new file to decide if we need to save changes.
MyDocumentListener myDocumentListener = new MyDocumentListener(); // define the listener class
comments.getDocument().addDocumentListener(myDocumentListener); // create the reference for the class
// ------ Document listener class -----------
class MyDocumentListener implements DocumentListener {
public void insertUpdate(DocumentEvent e) {
Calculate(e);
public void removeUpdate(DocumentEvent e) {
Calculate(e);
public void changedUpdate(DocumentEvent e) {
private void Calculate(DocumentEvent e) {
// do something here
scrollpane = new JScrollPane(comments);
scrollpane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
saveButton = new JButton("Save Comments", new ImageIcon("images/Save16.gif"));
saveButton.addActionListener( this );
saveButton.setToolTipText("Click this button to save the current file.");
openButton = new JButton("Open File...", new ImageIcon("images/Open16.gif"));
openButton.addActionListener( this );
openButton.setToolTipText("Click this button to open a file.");
whiteshark = new JLabel("", new ImageIcon("images/gwhite.gif"), JLabel.CENTER);
Box boxH;
boxH = Box.createHorizontalBox();
boxH.add(openButton);
boxH.add(Box.createHorizontalStrut(15));
boxH.add(saveButton);
box = Box.createVerticalBox();
box.add(scrollpane);
box.add(Box.createVerticalStrut(10));
box.add(boxH);
box.add(Box.createVerticalStrut(15));
box.add(whiteshark);
add(box);
} // closes constructor CenterPanel
public void actionPerformed( ActionEvent evt )
{ // open method actionPerformed
JFileChooser jfc = new JFileChooser();
// these do not work !!
// -- set the file types to view --
// ExtensionFileFilter filter = new ExtensionFileFilter();
// FileFilter filter = new FileFilter();
//filter.addExtension("java");
//filter.addExtension("txt");
//filter.setDescription("Text & Java Files");
//jfc.setFileFilter(filter);
     //Add a custom file filter and disable the default "Accept All" file filter.
jfc.addChoosableFileFilter(new JTFilter());
jfc.setAcceptAllFileFilterUsed(false);
// -- open the default directory --
// public void setCurrentDirectory(File dir)
// jfc.setCurrentDirectory(new File("C://divelog"));
jfc.setCurrentDirectory(defaultDirectory);
jfc.setSize(400, 300);
jfc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
Container parent = saveButton.getParent();
//========================= Test Button Actions ================================
//========================= Open Button ================================
if (evt.getSource() == openButton)
int choice = jfc.showOpenDialog(CenterPanel.this);
File file = jfc.getSelectedFile();
/* a: */
if (file != null && choice == JFileChooser.APPROVE_OPTION)
String filename = jfc.getSelectedFile().getAbsolutePath();
// -- compare the currentFile to the file chosen, alert of loosing any changes to currentFile --
// If (currentFile != filename)
// -- get the current directory name -------
// public File getCurrentDirectory( );
File f=new File(System.getProperty("user.dir"));
fileDirectory = jfc.getCurrentDirectory();
// -- remember the last directory used --
if (defaultDirectory != fileDirectory)
{defaultDirectory = fileDirectory;}
try
{ //opens try
comments.getLineCount( );
// -- clear the old data before importing the new file --
comments.selectAll();
comments.replaceSelection("");
// -- get the new data ---
br = new BufferedReader (new FileReader(file));
while ((str = br.readLine()) != null)
{//opens while
comments.append(str);
} //closes while
} // close try
catch (IOException ioe)
{ // open catch
comments.append(newline +"Open command not successful:" + ioe + newline);
} // close catch
// ---- display the values of the directory variables -----------------------
comments.append(
newline + "The f directory variable contains: " + f +
newline + "The fileDirectory variable contains: " + fileDirectory +
newline + "The defaultDirectory variable contains: " + defaultDirectory );
else
comments.append("Open command cancelled by user." + newline);
} //close if statement /* a: */
//========================= Save Button ================================
} else if (evt.getSource() == saveButton)
int choice = jfc.showSaveDialog(CenterPanel.this);
if (choice == JFileChooser.APPROVE_OPTION)
File fileName = jfc.getSelectedFile();
// -- get the current directory name -------
// public File getCurrentDirectory( );
File f=new File(System.getProperty("user.dir"));
fileDirectory = jfc.getCurrentDirectory();
// -- remember the last directory used --
if (defaultDirectory != fileDirectory)
{defaultDirectory = fileDirectory;}
//check for existing files. Warn users & ask if they want to overwrite
for(int i = 0; i < fileName.length(); i ++) {
File tmp = null;
tmp = (fileName);
if (tmp.exists()) // display pop-up alert
//public static int showConfirmDialog( Component parentComponent,
// Object message,
// String title,
// int optionType,
// int messageType,
// Icon icon);
int confirm = JOptionPane.showConfirmDialog(null,
fileName + " already exists on " + fileDirectory
+ "\n \nContinue?", // msg
"Warning! Overwrite File!", // title
JOptionPane.OK_CANCEL_OPTION, // buttons displayed
                    // JOptionPane.ERROR_MESSAGE
                    // JOptionPane.INFORMATION_MESSAGE
                    // JOptionPane.PLAIN_MESSAGE
                    // JOptionPane.QUESTION_MESSAGE
JOptionPane.WARNING_MESSAGE,
null);
if (confirm != JOptionPane.YES_OPTION)
{ //user cancels the file overwrite.
try {
jfc.cancelSelection();
break;
catch(Exception e) {}
// ----- Save the file if everything is OK ----------------------------
try
{ // opens try
BufferedWriter bw = new BufferedWriter(new FileWriter(fileName));
bw.write(comments.getText());
bw.flush();
bw.close();
comments.append( newline + newline + "Saving: " + fileName.getName() + "." + newline);
break;
} // closes try
catch (IOException ioe)
{ // open catch
comments.append(newline +"Save command unsuccessful:" + ioe + newline);
} // close catch
} // if exists
} //close for loop
else
comments.append("Save command cancelled by user." + newline);
} // end-if save button
} // close method actionPerformed
} //close constructor CenterPanel
} // Closes class CenterPanel

There is no way to be able to see MyDocumentListener class in the way you wrote. The reason is because MyDocumentListener class inside the constructor itself. MyDocumentListener class is an inner class, not suppose to be inside a constructor or a method. What you need to do is simple thing, just move it from inside the constructor and place it between two methods.
that's all folks
Qusay

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;
}

Recieving cannot resolve symbol symbol : class Serializable

I'm receiving the error:
cannot resolve symbol symbol : class Serializable
The class is as follows:
//package cscie160.hw5;
import java.io.Serializable
* @author Eddie Brodie
* @version %I%, %G%
public class AccountInfo implements Serializable
     public int _accountNumber;
     public int _pin;
     public AccountInfo(int accountNumber, int pin)
          _accountNumber = accountNumber;
          _pin = pin;
I've tried importing java.*
I've also checked my classpath.
Any ideas?

Try taking the import statement out of the comment block; that might help

Cannot resolve symbol: class EJBObject

Using javac I get this compile error on this file Calculator.java
Calculator.java:1: cannot resolve symbol
symbol : class EJBObject
location: package ejb
import javax.ejb.EJBObject;
^
Calculator.java:5: cannot resolve symbol
symbol : class EJBObject
location: interface Calculator
public interface Calculator extends EJBObject {
Source code for Calculator.java
import javax.ejb.EJBObject;
import java.rmi.*;
public interface Calculator extends EJBObject {
public long add (int x, int y) throws RemoteException;
public long subtract (int x, int y) throws RemoteException;

This code is from a book, so I will assume its a classpath problem. My
classpath looks like:
"C\QTJava.zip".;%J2EE_HOME%\lib\j2ee.jar;%J2EE_HOME%\lib\locale
Also the following enviorment varibales have been set to:
J2EE_HOME
C:\Development\Java\j2sdkee1.3.1
JAVA_HOME
C:\Development\Java\jdk1.3.1
Path
%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;C:\Program Files\Common Files\Adaptec Shared\System;%JAVA_HOME%\bin;%J2EE_HOME%\bin
I can run j2EE, like "j2EE -verbose" (no problems)
also run cloudscape, like "cloudscape -start" (no problems)
also can run deploytool, like "deploytool" (no problems, & deploy sample ear files from cd book)
Your help is appreicated.

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 resolve symbol : class odbc ERROR

Hi Helper
I am trying to compile a the following and I am getting the error
C:\jdk\websiter>javac MainServlet.java
MainServlet.java:86: cannot resolve symbol
symbol : class odbc
location: package jdbc
Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.io.*;
import java.util.*;
* This is the servlet to send the user the names of all the sites present in the database
public class MainServlet extends HttpServlet implements ServletConstants
Connection m_con;
PreparedStatement m_pstmt;
ResultSet m_res;
Vector m_vecsiteName;
public void Init(ServletConfig config) throws ServletException {
     super.init(config);
}// end of init()
public void service(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
          m_vecsiteName = new Vector();
     try {
     Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
m_con = DriverManager.getConnection("jdbc:odbc:sitewd", "", "");
How can i fix it? thanks
VT

Replace the Statement
Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);
as
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

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.

Cannot resolve symbol : import

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