Cannot Resolve Symbol on New Keyword

I done something stupid, but what?
I've defined a new class, in a new file that shares a package but cant instantiate it because the 'new' keyword apparently cant be resolved.
In the Main file I have ( last line shows the problem )..
package myprojects.a2a;
import java.awt.*;
import java.awt.event.*;
class A2A extends Frame {
     public A2A() {
          addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    dispose();
                    System.exit(0);
     public static void main(String args[]) {
          System.out.println("Starting A2A...");
          A2A mainFrame = new A2A();
          mainFrame.setSize(400, 400);
          mainFrame.setTitle("A2A");
          mainFrame.setVisible(true);
          clsWeapon a = new clsWeapon("Sword");
and in the clsClass file I have...
public class clsWeapon {
     int ShortRange;
     int MediumRange;
     int LongRange;
     StringBuffer WName;
     int Value;
     int CloseCombatValue;
     int UnionPointsValue;
     int ConfedPointsValue;
     public clsWeapon(){
     public clsWeapon(String args[]) {
          if(args[0]=="Sword"){

clsWeapon a = new clsWeapon("Sword");clsWeapon a = new clsWeapon(new String[] {"Sword"});

Similar Messages

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;
}

Cannot resolve symbol: class OracleDriver

Attempting to compile a servlet on Apache Server using same jdeveloper jdbc libraries:
classes12.jar & nls_charset12.jar
Error message:
$compilejava2.sh ProdJobs
ProdJobs.java:361: cannot resolve symbol
symbol : class OracleDriver
location: package driver
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
Am I missing something else?
Jeffrey

Enter this code into your program and then put the Oracle jar file that contains the driver in your run-time classpath.
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
catch(ClassNotFoundException cnfe) {
// driver not found
}The effect of this is that the classloader will load the Oracle driver for you then call it's static initiailizer that does a bunch of magic that results in the Java runtime knowing that there's a JDBC driver out there.
It is a little weird - but that's the way it works.

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 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

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.

Oracle jdbc drivers - cannot resolve symbol

while i'm not new to java, i am new to jdbc. need to connect a java app to an oracle database (hosted by a 3rd party). i have all the connection info. i've crafted a test program, but cannot get it to compile.
here's the code:
import java.sql.*;
public class SimpleJDBC
     public static void main(String[] args) throws SQLException, ClassNotFoundException
     Class.forName(oracle.jdbc.driver.OracleDriver);
     System.out.println("Driver loaded");
     Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@database.host:1521:class"); //, "username", "password");
     System.out.println("Database connected");
     Statement statement = conn.createStatement();
     ResultSet results = statement.executeQuery("select first_name, last_name from user_tbl where last_name = 'Kendall'");
     while(results.next())
          System.out.println(results.getString(1) + "\t" + results.getString(2));
     conn.close();
}i've set the classpath to the location of the ojdbc14.jar, and it shows in the classpath when i do a "set" on the cmd line. i've tried it in netbeans, eclipse, and straight cmd line.
i always come up with the same message (cannot resolve symbol) on the line where i call Class.forName(oracle.jdbc.driver.OracleDriver);.
i've tried compiling and setting the classpath at the same time. i added the ojdbc14.jar to the compile/build paths in both the ides. i even tried using the old classes12.jar. nothing has worked.
i can't figure out what else there is. within the ides, the intellisense will actually let me put that line in (piece by piece), but then it shows an error.
any suggestions?

Place the string name of the driver in quotes.
- Saish

Cannot resolve symbol: HashMap, put and strings

Hi,
why woudl I get a "cannot resolve symbol" at the line indicated by <============
sec_cands[i] should be a String already.
Can someone help me ?
Thanks in advance.
HashMap temp = new HashMap();
String [] sec_cands = sec_ex.getTargetPhrases();
int sec_length = sec_cands.length;
String [] allCands = new String[total_length];
if (sec_length > 0 ) {
for (int i = 0; i < sec_cands.length; i++)
allCands[fr_length+i] = sec_cands;
temp.put(sec_cands[i], true); <=================

Sorry, I accidentally deleted a subscript from a line. The real code is "
HashMap temp = new HashMap();
String [] sec_cands = sec_ex.getTargetPhrases();
int sec_length = sec_cands.length;
String [] allCands = new String[total_length];
if (sec_length > 0 ) {
for (int i = 0; i < sec_cands.length; i++)
allCands[fr_length+i] = sec_cands;
temp.put(sec_cands[i], true); <=================

IntValue - ")" expected and Cannot Resolve Symbol

I used intValue to convert an Integer to primitive (see below) and ran into syntax errors.
                LogDataBean lb = new LogDataBean();
                lb.setLog_time( ( String )row.get( "LOG_TIME" ) );
                lb.setLog_pid( intValue( Integer )row.get( "LOG_PID" )); //where syntax error occur
                lb.setLog_user( ( String )row.get( "LOG_USER" ) );the row.get( "LOG_PID" ) gets the value of the column "LOG_PID" from a database table and returns an object. Therefore, I first cast the object to Integer and then try to use the intValue to convert it to a primitive int.
But, the statement resulted in compilation error: ")" expected.
When I modified the statement a little bit by adding a pair of parenthesis:
                lb.setLog_pid( intValue( ( Integer )row.get( "LOG_PID" ) ) ); //where syntax error occurI got "Cannot Resolve Symbol: intValue". I have import java.lang.Integer in the beginning of the class.

Integer.parseInt(row.get( "LOG_PID" ))
I'm assuming thats what you want to. Although you syntax is terribly wrong. Have a look at some tutorials.

Try/catch and 'cannot resolve symbol'

I am relatively new to java programming and something has me puzzled...
Why do I get a 'cannot resolve symbol' message when I include a variable definition in a try/catch section. When I put it/them before the 'try' statement it compiles as expected. How are statements inside a try compiled differently than those outside?
try {
    StringBuffer pageBuffer = new StringBuffer();
    String inputLine;
    BufferedReader in = new BufferedReader(
       new InputStreamReader( theURL.openStream() ) );
    while ((inputLine = in.readLine()) != null) {
         System.out.println(inputLine);
        pageBuffer.append(inputLine);
    in.close();
} catch (Exception ignored) {}C:\Projects\WebExplorer\PageVisitor.java:142: cannot resolve symbol
symbol : variable pageBuffer
location: class PageVisitor
     return pageBuffer.toString();
Paul

A try block is just like any other block delimited by {...} in that all variables declared inside it are local to that block. I.e. they are not visible or usable anywhere outside it. Your pageBuffer variable, for example, is a local variable that can only be used inside the try-block in which it is declared.
Your obvious solution, knowing that, is to declare the variables outside the try and catch blocks. Remember to initialize them (even to null), otherwise the compiler will complain about variables that may not have been initialized.

Compiling error - cannot resolve symbol

Hi,
I am working on writing out this basic code for a project. When I compile, I get an error "Cannot resolve symbol" for the gpa variable. Please help!
My intention is to use the hours and points from the crHours and nbrPoints methods, and use them to calculate GPA in the grPtAvg method:
public class Student
     public static void main(String[]args)
idNum();
crHours();
nbrpoints();
gpa = grPtAvg(hours, points);
System.out.println("Student's GPA is " + gpa);
public static void idNum()
int id = 2520;
System.out.println("Student's ID is " + id);
public static float crHours()
float hours = 5;
System.out.println("Student's credit hours are " + hours);
return hours;
public static float nbrpoints()
float points = 22;
System.out.println("Student's earned points are " + points);
return points;
public static float grPtAvg(float hours, float points)
float gpa;
gpa = points / hours;
System.out.println("Student's computed GPA is " + gpa);
return gpa;

That's because you're doing the same thing (in a somewhat different way) with those.
The variables: hours and points have already been returned to main methd, right?Yes, but then the main method ignores them.
So, they should be available at this point in the code, is that right?Available in the sense that you can read them, but not in the sense that there are hours and points variables within scope in the main method.
You want to do this:
public static void main(String[] args) {
   idNum();
   float hours = crHours();
   float points = nbrpoints();
   //create a new float
   float myComputetdGpa = grPtAvg(hours, points);
   System.out.println("Student's GPA is " + myComputedGpa);
}

Cannot Resolve Symbol on New Keyword

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