Help in resolving symbol

Hi everyone , im new to java but im working hard at it, i am doing a a java applet and i have assigned buttons , comboboxes etc, but when i go to compile its sayin it cant resolve the symbol. I hve 26 errors and this is one of them........im inserting a piece of the code error comment
any assistance to reslove will be appreciated.
RepairJobs.java:212:cannot resolve symbol
symbol : class ActionListener
location: class RepairJobs
new ActionListener()

Looking at what he posted, it looks like he is creating an anonymous inner class. If you know your java compiler errors, then you would know that the error that he is getting indicates that the compiler cannot find a class named ActionListener in any of the packages that have been imported (whether implicitly or explicitly). Implementing an interface that the compiler doesn't know about will do nothing to solve his problem.

Similar Messages

Very URGENT: PLS HELP:canno resolve symbol session.setAttrribute

hi everbody,
i'm new at this and have got a presentation after 1 day!....pls help
when i compile the servlet i get :
cannot resolve symbol
metod: setAttribute (java.lang.String,java.lang.String)
location: interface(javax.servlet.http.HttpSession)
the servlet that gets te error when comiled is:
* Authenticate.java
// this places all user variables in session
//to access use session.getAttribute
//dispatcher stuff
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import java.sql.*;
import java.io.*;
import java.util.*;
* @author Gudiya
* @version
public class Authenticate extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
HttpSession session = request.getSession(true);
Connection con=null;
String sessionid;
String deptcode;
String desig;
String add1;
String add2;
String contname;
PrintWriter out = response.getWriter();
try
response.setContentType("text/html");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con=DriverManager.getConnection("jdbc:odbc:SACFA","","");
System.out.println("connection established");
catch(ClassNotFoundException e){
System.out.println("database driver not found");
System.out.println(e.toString());
catch(Exception e){System.out.println(e.toString());
// ServletContext context=getServletContext();
String username=request.getParameter("username");
String password=request.getParameter("password");
try{
PreparedStatement stmt=con.prepareStatement("SELECT * FROM AUTHENTICATION,mb_add where AUTHENTICATION.NAME=? AND AUTHENTICATION.PASSWORD=? AND mb_add.DEPT_NAME=?");
stmt.setString(1,username);
stmt.setString(2,password);
stmt.setString(3,username);
ResultSet rs=stmt.executeQuery();
boolean rowfound=false;
rowfound=rs.next();
if (rowfound==true)
sessionid=session.getId();
System.out.println(sessionid);
//context.setAttribute("userid",sessionid);
// session.setAttribute("user",username);
rs.beforeFirst();
while (rs.next())
deptcode=rs.getString("DEPT_CODE");
desig=rs.getString("DESIGNATION");
add1=rs.getString("ADDRESS1");
add2=rs.getString("ADDRESS2");
contname=rs.getString("NAME");
session.setAttribute("dept_code",deptcode);
session.setAttribute("designation",desig);
session.setAttribute("address1",add1);
session.setAttribute("address2",add2);
session.setAttribute("cont_name",contname);
//context.getRequestDispatcher(request.getParameter("dispatcho")).forward(request,response);
}          out.println("<html>");
          out.println("<head>");
          out.println("<title>Successful Login Screen</title>");
          out.println("</head>");
          out.println("<body bgcolor='ORANGE'>");
out.println("<script language='Javascript'>");
out.println("");
out.println("</script>");
out.println("WELCOME MEMBERS FROM "+ username);
//print decorative html statements here
          out.println(" SELECT NY ONE ACTION:-");
out.println("<form Action="+"\"servlet/noc\""+" method =post>");//call for your noc servlet
//print decorative html statements here
out.println("<INPUT TYPE=submit VALUE='GENERATE NOC' NAME='NOC' language='javascript'>");
out.println("</form>");
//print decorative html statements here
out.println("<form Action="+"\"servlet/comments\""+" method =post>");//call for your comment servlet
out.println("<INPUT TYPE=submit VALUE='ENTER/ MODIFY COMMENTS' NAME='COMMENTS' language='javascript' >");
out.println("</form>");
//print decorative html statements here
out.println("<form Action="+"\"servlet/bye\""+" method = post>");
out.println("<INPUT TYPE=submit VALUE=EXIT NAME=EXIT language='javascript' >"); //place javascript fucction for exiting window
out.println("</form>");
          out.println("</body>");
          out.println("</html>");
con.close();
} catch( SQLException e){ }
out.close();}
NOTE: I'M USING JDK1.3 and jsdk2.0
pls help me....
Thank u all,
ashna

HTTP Status 404 - /mywork/servlet/Authenticate
hi dheeraj,
thank u so much the servlet comiled!!!
now i have a new problem....the Tomcat server cannot find its class file. i have placed the class file in C:\Program Files\Apache Group\Tomcat 4.1\webapps\mywork\WEB-INF\classes.
the error it shows is as follows:
type Status report
message /mywork/servlet/Authenticate
description The requested resource (/mywork/servlet/Authenticate) is not available.
Apache Tomcat/4.1.18-LE-jdk14
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!11

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" 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.****

HELP PLEASE Cannot resolve symbol error

Only just started to atempt simple java programs and this same error keeps appearing. code i am using is:
import java.io.*;
class Q1
     public static void main(String[] args) throws IOException
          int num1,num2,sum;
          /*program statements start here*/
     System.out.printIn ("Input a number");
               num1= Course_io.readInt();
          System.out.printIn ("Input another number");
               num2= Course_io.readInt();
               sum= num2 - num1;
          System.out.printIn ("Total is" +sum );
and this is the error message i keep getting:
javac -d . -g "C:\Java Programs\Q1.java"
C:\Java Programs\Q1.java:12: cannot resolve symbol
symbol : method printIn (java.lang.String)
location: class java.io.PrintStream
System.out.printIn ("Input a number");
^
C:\Java Programs\Q1.java:16: cannot resolve symbol
symbol : method printIn (java.lang.String)
location: class java.io.PrintStream
System.out.printIn ("Input another number");
^
C:\Java Programs\Q1.java:22: cannot resolve symbol
symbol : method printIn (java.lang.String)
location: class java.io.PrintStream
System.out.printIn ("Total is" +sum );
^
3 errors
Please help me, Thankyou.

sum= num2 - num1;
System.out.printIn ("Total is" +sum );While you're at it, do something about this, it's misleading.
kind regards,
Jos

Need help - method call error cannot resolve symbol

My code compiles fine but I continue to receive a method call error "cannot resolve symbol - variable superman" - can't figure out why. Here is my code:
public static String caesar(String message, int shift)
{   [b]String result = "";
for(int i = 0; i < message.length(); ++i)
{   [b]char newChar = message.charAt(i + shift);
result += newChar;
return result.toUpperCase();
I entered "superman" for message and "3" for the shift. Can someone please help? Thanks!

Your post worked great - especially since it made me realize I was going about it all wrong! I was attempting to convert "superman" to "vxshupdq" - basically a cipher shift starting at index 0 and shifting it 3 character values which would result in s changing to v. I restructured my code:
public static String caesar(String message, int shift)
{   [b]String result = "";
for(int i = 0; i < message.length(); ++i)
{   [b]char newChar = message.charAt(i);
result += (newChar + shift) % message.length();
return result.toUpperCase();
But it's displaying the result as a "60305041". How can I get it to display the actual characters?

Help!!! error: cannot resolve symbol

can anyone tell me how to solve the following problem
thank you
cannot resolve symbol
symbol : method decode (java.lang.String)
location: class java.lang.Short
Short psmShort = Short.decode(psmString);
^
Long bdAddrLong = Long.decode("0x" + bdAddrString);
^

that is because these methods does not exist. What you can use instead is parseShort(String) or parseLong.
Maybe reading the javadoc could help you next time ;-)
hth
Kay

Illegal start of expression and cannot resolve symbol HELP

Can someone pls help me?
These are the two problems:
--------------------Configuration: j2sdk1.4.1_02 <Default>--------------------
C:\Documents and Settings\Laila\My Documents\CMT2080\Coursework\Game\Mindboggler.java:291: illegal start of expression
public void inputJButtonActionPerformed( ActionEvent event )
^
C:\Documents and Settings\Laila\My Documents\CMT2080\Coursework\Game\Mindboggler.java:285: cannot resolve symbol
symbol: method inputJButtonActionPerformed (java.awt.event.ActionEvent)
               inputJButtonActionPerformed( event);
Here is my code :
//Mind boggler quiz
//Marcelyn Samson
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.border.*;
import java.lang.*;
public class Mindboggler extends JFrame
          // JPanel for welcome window
          private JPanel welcomeJPanel;
          private JPanel presetJPanel;
     private JLabel titleJLabel;
     private JLabel quizJLabel;
     private JLabel girlJLabel, headJLabel;
     private JLabel introJLabel;
     private JButton startJButton;
     // JPanel for questionone window
     private JPanel questiononeJPanel;
     private JLabel textJLabel;
     private JPanel becksJPanel;
     private JButton oneJButton, twoJButton, threeJButton, fourJButton, nextJButton;
          //JPanel for questiontwo window
          private JPanel questiontwoJPanel;
          private JPanel orlandoJPanel;
          private JLabel q2JLabel;
          private JCheckBox lordJCheckBox;
          private JCheckBox faceJCheckBox;
          private JCheckBox piratesJCheckBox;
          private JButton next2JButton;
     private JButton inputJButton;
     //JPanel for questionthree
     private JPanel questionthreeJPanel;
     private JPanel howmuchJPanel;
     private JLabel howmuchJLabel;
     private JLabel nameJLabel;
     private JTextField nameJTextField;
     private JLabel moneyJLabel;
     private JTextField moneyJTextField;
     private JButton next3JButton;
     //Publics
     public JPanel welcomeJFrame, questionJFrame, questiontwoJFrame, questionthreeJFrame;
     //contentPane
          public Container contentPane;
          //no argument constructor
          public Mindboggler()
               createUserInterface();
          //create and position components
          private void createUserInterface()/////////////////////////; semo colon do not edit copy paste
               //get contentPane and set layout to null
               contentPane = getContentPane();
               contentPane.setLayout ( null );
               welcome();
               //set properties of applications window
               setTitle( "Mindboggler" ); // set JFrame's title bar string
          setSize( 600, 400 ); // set width and height of JFrame
          setVisible( true ); // display JFrame on screen
          } // end method createUserInterface
          public void welcome(){
                    // set up welcomeJPanel
               welcomeJPanel = new JPanel();
               welcomeJPanel.setLayout( null );
               welcomeJPanel.setBounds(0, 0, 600, 400);
               welcomeJPanel.setBackground( Color.GREEN );
               // set up textJLabel
               titleJLabel = new JLabel();
               titleJLabel.setText( "Mind Boggler" );
               titleJLabel.setLocation( 30, 10);
               titleJLabel.setSize( 550, 70);
               titleJLabel.setFont( new Font( "SansSerif", Font.PLAIN, 30 ) );
               titleJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add( titleJLabel );
               // set up presetJPanel
               presetJPanel = new JPanel();
               presetJPanel.setLayout( null );
               presetJPanel.setBounds( 150, 10, 300, 80 );
               presetJPanel.setBackground( Color.GRAY );
               welcomeJPanel.add( presetJPanel );
               //setup Intro JLabel
               introJLabel = new JLabel();
               introJLabel.setText( "Think, think, think. Can you get all the questions right?" );
               introJLabel.setBounds( 40, 100, 500, 200 );
               introJLabel.setFont( new Font( "SansSerif", Font.PLAIN, 18 ) );
               introJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(introJLabel);
               //set up head JLabel
               headJLabel = new JLabel();
               headJLabel.setIcon( new ImageIcon( "head.jpeg") );
               headJLabel.setBounds( 540, 5, 40, 160 );
               headJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(headJLabel);
                    //setup girlJLabel
               girlJLabel = new JLabel();
               girlJLabel.setIcon( new ImageIcon( "girl.Jjpeg") );
               girlJLabel.setBounds( 5, 10, 60, 100 );
               girlJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(girlJLabel);
                    //set up startJbutton
               startJButton = new JButton();
               startJButton.setText( "Start" );
               startJButton.setBounds(250, 300, 100, 30);
               startJButton.setFont( new Font( "SansSerif", Font.BOLD, 14) );
               welcomeJPanel.add(startJButton);
               contentPane.add(welcomeJPanel);
               startJButton.addActionListener(
                    new ActionListener(){
                         public void actionPerformed(ActionEvent e){
                              question();
          public void question()
               //set up question one JPanel
               welcomeJPanel.setVisible(false);
               questiononeJPanel = new JPanel();
     questiononeJPanel.setLayout( null );
          questiononeJPanel.setBounds(0, 0, 600,400);
          questiononeJPanel.setBackground( Color.GREEN );
          // set up textJLabel
          textJLabel = new JLabel();
          textJLabel.setText( "Who did Beckham supposedly cheat with?" );
          textJLabel.setLocation( 20, 20);
          textJLabel.setSize( 550, 70);
          textJLabel.setFont( new Font( "SansSerif", Font.BOLD, 20 ) );
          textJLabel.setHorizontalAlignment( JLabel.CENTER );
          questiononeJPanel.add( textJLabel );
               // set up presetJPanel
          becksJPanel = new JPanel();
          becksJPanel.setLayout( null );
          becksJPanel.setBorder( new TitledBorder(
     "Question 1" ) );
          becksJPanel.setBounds( 10, 10, 570, 80 );
          becksJPanel.setBackground( Color.GRAY );
          questiononeJPanel.add( becksJPanel );
               // set up oneJButton
          oneJButton = new JButton();
          oneJButton.setBounds( 10, 120, 300, 40 );
          oneJButton.setText( "Britney Spears" );
          oneJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( oneJButton );
          // set up twoJButton
          twoJButton = new JButton();
          twoJButton.setBounds( 10, 180, 300, 40 );
          twoJButton.setText( "Meg Ryan" );
          twoJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( twoJButton );
          // set up threeJButton
          threeJButton = new JButton();
          threeJButton.setBounds( 10, 240, 300, 40 );
          threeJButton.setText( "Rebecca Loos" );
          threeJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( threeJButton );
          // set up fourJButton
          fourJButton = new JButton();
          fourJButton.setBounds( 10, 300, 300, 40 );
          fourJButton.setText( "Angelina Jolie" );
          fourJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( fourJButton );
               // set up nextJButton
               nextJButton = new JButton();
               nextJButton.setBounds ( 375, 300, 150, 40 );
               nextJButton.setText("Next");
               nextJButton.setBackground( Color.GRAY );
               questiononeJPanel.add( nextJButton );
               contentPane.add(questiononeJPanel);
          nextJButton.addActionListener(
                    new ActionListener(){
                         public void actionPerformed(ActionEvent e){
                              questiontwo();
          public void questiontwo()
               //set up question two JPanel
               questiononeJPanel.setVisible(false);
               questiontwoJPanel=new JPanel();
               questiontwoJPanel.setLayout(null);
               questiontwoJPanel.setBounds(0, 0, 600, 400);
               questiontwoJPanel.setBackground( Color.GREEN );
               // set up q2JLabel
          q2JLabel = new JLabel();
          q2JLabel.setBounds( 20, 20, 550, 70 );
          q2JLabel.setText( "What films has Orlando Bloom starred in?" );
          q2JLabel.setFont(new Font( "SansSerif", Font.BOLD, 20 ) );
     q2JLabel.setHorizontalAlignment( JLabel.CENTER );
questiontwoJPanel.add(q2JLabel);
//set up orlandoJPanel
orlandoJPanel = new JPanel();
orlandoJPanel.setLayout(null);
orlandoJPanel.setBorder( new TitledBorder("Question 2"));
orlandoJPanel.setBounds( 10, 10, 570, 80);
orlandoJPanel.setBackground(Color.GRAY);
questiontwoJPanel.add(orlandoJPanel);
// set up lordJCheckBox
          lordJCheckBox = new JCheckBox();
          lordJCheckBox.setBounds( 16, 112, 200, 24 );
          lordJCheckBox.setText( "1. Lord of The Rings" );
          questiontwoJPanel.add( lordJCheckBox );
               // set up faceJCheckBox
          faceJCheckBox = new JCheckBox();
          faceJCheckBox.setBounds( 16, 159, 200, 24 );
          faceJCheckBox.setText( "2. Face Off" );
          questiontwoJPanel.add( faceJCheckBox );
          // set up piratesJCheckBox
          piratesJCheckBox = new JCheckBox();
          piratesJCheckBox.setBounds( 16, 206, 200, 24 );
          piratesJCheckBox.setText( "3. Pirates of The Caribean" );
          questiontwoJPanel.add( piratesJCheckBox );
          // set up inputJButton
          inputJButton = new JButton();
          inputJButton.setBounds(20, 256, 200, 21 );
          inputJButton.setText( "Input answer" );
          questiontwoJPanel.add( inputJButton );
inputJButton.addActionListener(
     new ActionListener()
          //event handler called when user clicks inputJButton
          public void actionPerformed( ActionEvent event )
               inputJButtonActionPerformed( event);
//show JOptionMessages when user clicks on JCheckBoxes and inputJButton
public void inputJButtonActionPerformed( ActionEvent event )
     //display error message if no JCheckBoxes is checked
     if ( ( !lordJCheckBox.isSelected() && !faceJCheckBox.isSelected() && !piratesJCheckBox.isSelected() ) )
          //display error message
          JOptionPane.showMessageDialog( null, "Please check two boxes", JOptionPane.ERROR_MESSAGE );
     // if lordjcheckbox and pirates is selected = right
     else
          if ( ( lordJCheckBox.isSelected() && piratesJCheckBox.isSelected() ))
               JOptionPane.showMessageDialog(null, "Thats RIGHT!");
          //if others are selected = wrong
          else
               if ( (lordJCheckBox.isSelected() && faceJCheckBox.isSelected() ))
                    JOptionPane.showMessageDialog(null, "Thats WRONG");
               else
                    ( (faceJCheckBox.isSelected() && piratesJCheckBox.isSelected() ))
                         JOptionPane.showMessageDialog(null, "Thats WRONG");
// set up nest2JButton
          next2JButton = new JButton();
          next2JButton.setBounds( 155, 296, 94, 24 );
          next2JButton.setText( "Next" );
          questiontwoJPanel.add( next2JButton );
contentPane.add(questiontwoJPanel);
next2JButton.addActionListener(
     new ActionListener(){
          public void actionPerformed(ActionEvent e){
               questionthree();
} // end questiontwo
public void questionthree()
     //setup questionthree JPanel
     questiontwoJPanel.setVisible(false);
     questionthreeJPanel = new JPanel();
     questionthreeJPanel.setLayout(null);
     questionthreeJPanel.setBounds(0, 0, 600, 400);
     questionthreeJPanel.setBackground( Color.GREEN);
          // main method
          public static void main( String[] args )
          Mindboggler application = new Mindboggler();
          application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
          } // end method main
}// end class
WOULD BE VERY GEATFUL

Just want to say thank you by the way for trying to help. Ive moved public void inputJButtonActionPerformed( ActionEvent event ) outside of brackets. Now i have a different problem on it. Sorry about this.
PROBLEM: --------------------Configuration: <Default>--------------------
C:\Documents and Settings\Laila\My Documents\CMT2080\Coursework\Game\Mindboggler.java:353: 'else' without 'if'
else ( ( !lordJCheckBox.isSelected() && !faceJCheckBox.isSelected && !piratesJCheckBox.isSelected() ) )
^
1 error
Process completed.
MY CODE:
//Mind boggler quiz
//Marcelyn Samson
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
import javax.swing.*;
import javax.swing.border.*;
import java.lang.*;
public class Mindboggler extends JFrame
          // JPanel for welcome window
          private JPanel welcomeJPanel;
          private JPanel presetJPanel;
     private JLabel titleJLabel;
     private JLabel quizJLabel;
     private JLabel girlJLabel, headJLabel;
     private JLabel introJLabel;
     private JButton startJButton;
     // JPanel for questionone window
     private JPanel questiononeJPanel;
     private JLabel textJLabel;
     private JPanel becksJPanel;
     private JButton oneJButton, twoJButton, threeJButton, fourJButton, nextJButton;
          //JPanel for questiontwo window
          private JPanel questiontwoJPanel;
          private JPanel orlandoJPanel;
          private JLabel q2JLabel;
          private JCheckBox lordJCheckBox;
          private JCheckBox faceJCheckBox;
          private JCheckBox piratesJCheckBox;
          private JButton next2JButton;
     private JButton inputJButton;
     //JPanel for questionthree
     private JPanel questionthreeJPanel;
     private JPanel howmuchJPanel;
     private JLabel howmuchJLabel;
     private JLabel nameJLabel;
     private JTextField nameJTextField;
     private JLabel moneyJLabel;
     private JTextField moneyJTextField;
     private JButton next3JButton;
     //Publics
     public JPanel welcomeJFrame, questionJFrame, questiontwoJFrame, questionthreeJFrame;
     //contentPane
          public Container contentPane;
          //no argument constructor
          public Mindboggler()
               createUserInterface();
          //create and position components
          private void createUserInterface()/////////////////////////; semo colon do not edit copy paste
               //get contentPane and set layout to null
               contentPane = getContentPane();
               contentPane.setLayout ( null );
               welcome();
               //set properties of applications window
               setTitle( "Mindboggler" ); // set JFrame's title bar string
          setSize( 600, 400 ); // set width and height of JFrame
          setVisible( true ); // display JFrame on screen
          } // end method createUserInterface
          public void welcome(){
                    // set up welcomeJPanel
               welcomeJPanel = new JPanel();
               welcomeJPanel.setLayout( null );
               welcomeJPanel.setBounds(0, 0, 600, 400);
               welcomeJPanel.setBackground( Color.GREEN );
               // set up textJLabel
               titleJLabel = new JLabel();
               titleJLabel.setText( "Mind Boggler" );
               titleJLabel.setLocation( 30, 10);
               titleJLabel.setSize( 550, 70);
               titleJLabel.setFont( new Font( "SansSerif", Font.PLAIN, 30 ) );
               titleJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add( titleJLabel );
               // set up presetJPanel
               presetJPanel = new JPanel();
               presetJPanel.setLayout( null );
               presetJPanel.setBounds( 150, 10, 300, 80 );
               presetJPanel.setBackground( Color.GRAY );
               welcomeJPanel.add( presetJPanel );
               //setup Intro JLabel
               introJLabel = new JLabel();
               introJLabel.setText( "Think, think, think. Can you get all the questions right?" );
               introJLabel.setBounds( 40, 100, 500, 200 );
               introJLabel.setFont( new Font( "SansSerif", Font.PLAIN, 18 ) );
               introJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(introJLabel);
               //set up head JLabel
               headJLabel = new JLabel();
               headJLabel.setIcon( new ImageIcon( "head.jpeg") );
               headJLabel.setBounds( 540, 5, 40, 160 );
               headJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(headJLabel);
                    //setup girlJLabel
               girlJLabel = new JLabel();
               girlJLabel.setIcon( new ImageIcon( "girl.Jjpeg") );
               girlJLabel.setBounds( 5, 10, 60, 100 );
               girlJLabel.setHorizontalAlignment( JLabel.CENTER );
               welcomeJPanel.add(girlJLabel);
                    //set up startJbutton
               startJButton = new JButton();
               startJButton.setText( "Start" );
               startJButton.setBounds(250, 300, 100, 30);
               startJButton.setFont( new Font( "SansSerif", Font.BOLD, 14) );
               welcomeJPanel.add(startJButton);
               contentPane.add(welcomeJPanel);
               startJButton.addActionListener(
                    new ActionListener(){
                         public void actionPerformed(ActionEvent e){
                              question();
          public void question()
               //set up question one JPanel
               welcomeJPanel.setVisible(false);
               questiononeJPanel = new JPanel();
     questiononeJPanel.setLayout( null );
          questiononeJPanel.setBounds(0, 0, 600,400);
          questiononeJPanel.setBackground( Color.GREEN );
          // set up textJLabel
          textJLabel = new JLabel();
          textJLabel.setText( "Who did Beckham supposedly cheat with?" );
          textJLabel.setLocation( 20, 20);
          textJLabel.setSize( 550, 70);
          textJLabel.setFont( new Font( "SansSerif", Font.BOLD, 20 ) );
          textJLabel.setHorizontalAlignment( JLabel.CENTER );
          questiononeJPanel.add( textJLabel );
               // set up presetJPanel
          becksJPanel = new JPanel();
          becksJPanel.setLayout( null );
          becksJPanel.setBorder( new TitledBorder(
     "Question 1" ) );
          becksJPanel.setBounds( 10, 10, 570, 80 );
          becksJPanel.setBackground( Color.GRAY );
          questiononeJPanel.add( becksJPanel );
               // set up oneJButton
          oneJButton = new JButton();
          oneJButton.setBounds( 10, 120, 300, 40 );
          oneJButton.setText( "Britney Spears" );
          oneJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( oneJButton );
          // set up twoJButton
          twoJButton = new JButton();
          twoJButton.setBounds( 10, 180, 300, 40 );
          twoJButton.setText( "Meg Ryan" );
          twoJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( twoJButton );
          // set up threeJButton
          threeJButton = new JButton();
          threeJButton.setBounds( 10, 240, 300, 40 );
          threeJButton.setText( "Rebecca Loos" );
          threeJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( threeJButton );
          // set up fourJButton
          fourJButton = new JButton();
          fourJButton.setBounds( 10, 300, 300, 40 );
          fourJButton.setText( "Angelina Jolie" );
          fourJButton.setBackground( Color.ORANGE );
          questiononeJPanel.add( fourJButton );
               // set up nextJButton
               nextJButton = new JButton();
               nextJButton.setBounds ( 375, 300, 150, 40 );
               nextJButton.setText("Next");
               nextJButton.setBackground( Color.GRAY );
               questiononeJPanel.add( nextJButton );
               contentPane.add(questiononeJPanel);
          nextJButton.addActionListener(
                    new ActionListener(){
                         public void actionPerformed(ActionEvent e){
                              questiontwo();
          public void questiontwo()
               //set up question two JPanel
               questiononeJPanel.setVisible(false);
               questiontwoJPanel=new JPanel();
               questiontwoJPanel.setLayout(null);
               questiontwoJPanel.setBounds(0, 0, 600, 400);
               questiontwoJPanel.setBackground( Color.GREEN );
               // set up q2JLabel
          q2JLabel = new JLabel();
          q2JLabel.setBounds( 20, 20, 550, 70 );
          q2JLabel.setText( "What films has Orlando Bloom starred in?" );
          q2JLabel.setFont(new Font( "SansSerif", Font.BOLD, 20 ) );
     q2JLabel.setHorizontalAlignment( JLabel.CENTER );
questiontwoJPanel.add(q2JLabel);
//set up orlandoJPanel
orlandoJPanel = new JPanel();
orlandoJPanel.setLayout(null);
orlandoJPanel.setBorder( new TitledBorder("Question 2"));
orlandoJPanel.setBounds( 10, 10, 570, 80);
orlandoJPanel.setBackground(Color.GRAY);
questiontwoJPanel.add(orlandoJPanel);
// set up lordJCheckBox
          lordJCheckBox = new JCheckBox();
          lordJCheckBox.setBounds( 16, 112, 200, 24 );
          lordJCheckBox.setText( "1. Lord of The Rings" );
          questiontwoJPanel.add( lordJCheckBox );
               // set up faceJCheckBox
          faceJCheckBox = new JCheckBox();
          faceJCheckBox.setBounds( 16, 159, 200, 24 );
          faceJCheckBox.setText( "2. Face Off" );
          questiontwoJPanel.add( faceJCheckBox );
          // set up piratesJCheckBox
          piratesJCheckBox = new JCheckBox();
          piratesJCheckBox.setBounds( 16, 206, 200, 24 );
          piratesJCheckBox.setText( "3. Pirates of The Caribean" );
          questiontwoJPanel.add( piratesJCheckBox );
          // set up inputJButton
          inputJButton = new JButton();
          inputJButton.setBounds(20, 256, 200, 21 );
          inputJButton.setText( "Input answer" );
          questiontwoJPanel.add( inputJButton );
inputJButton.addActionListener(
     new ActionListener()
          //event handler called when user clicks inputJButton
          public void actionPerformed( ActionEvent event )
               inputJButtonActionPerformed( event);
// set up nest2JButton
          next2JButton = new JButton();
          next2JButton.setBounds( 155, 296, 94, 24 );
          next2JButton.setText( "Next" );
          questiontwoJPanel.add( next2JButton );
contentPane.add(questiontwoJPanel);
next2JButton.addActionListener(
     new ActionListener(){
          public void actionPerformed(ActionEvent e){
               questionthree();
} // end questiontwo
public void questionthree()
     //setup questionthree JPanel
     questiontwoJPanel.setVisible(false);
     questionthreeJPanel = new JPanel();
     questionthreeJPanel.setLayout(null);
     questionthreeJPanel.setBounds(0, 0, 600, 400);
     questionthreeJPanel.setBackground( Color.GREEN);
     //setup howmuchJLabel
     howmuchJLabel = new JLabel();
     howmuchJLabel.setText("I'm a student and would be very greatful if you could donate some money as it would help me very much.");
     howmuchJLabel.setBounds(20, 20, 550, 70);
     howmuchJLabel.setFont(new Font("SansSerif",Font.BOLD,14));
     howmuchJLabel.setHorizontalAlignment(JLabel.CENTER);
     questionthreeJPanel.add(howmuchJLabel);
     //setup howmuchJPanel
     howmuchJPanel = new JPanel();
     howmuchJPanel.setLayout(null);
     howmuchJPanel.setBorder( new TitledBorder("Question 3"));
     howmuchJPanel.setBounds(10, 10, 570, 80);
     howmuchJPanel.setBackground( Color.GRAY);
     questionthreeJPanel.add(howmuchJPanel);
     //setup nameJLabel
     nameJLabel = new JLabel();
     nameJLabel.setText("Name");
     nameJLabel.setBounds(10, 160, 150, 24);
     nameJLabel.setFont(new Font("SansSerif",Font.BOLD,12));
     questionthreeJPanel.add(nameJLabel);
     //setup nameJTextField
     nameJTextField = new JTextField();
     nameJTextField.setBounds(125, 160, 200, 24 );
     questionthreeJPanel.add(nameJTextField);
     contentPane.add(questionthreeJPanel);
     //show JOptionMessages when user clicks on JCheckBoxes and inputJButton
public void inputJButtonActionPerformed( ActionEvent event )
     //display error message if no JCheckBoxes is checked
     else ( ( !lordJCheckBox.isSelected() && !faceJCheckBox.isSelected && !piratesJCheckBox.isSelected() ) )
          //display error message
          JOptionPane.showMessageDialog( null, "Please check two boxes", JOptionPane.ERROR_MESSAGE );
     // if lordjcheckbox and pirates is selected = right
     else
          if ( ( lordJCheckBox.isSelected() && piratesJCheckBox.isSelected() ))
               JOptionPane.showMessageDialog(null, "Thats RIGHT!");
          //if others are selected = wrong
          else
               if ( (lordJCheckBox.isSelected() && faceJCheckBox.isSelected() ))
                    JOptionPane.showMessageDialog(null, "Thats WRONG");
               else
                    ( (faceJCheckBox.isSelected() && piratesJCheckBox.isSelected() ))
                         JOptionPane.showMessageDialog(null, "Thats WRONG");
          // main method
          public static void main( String[] args )
          Mindboggler application = new Mindboggler();
          application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
          } // end method main
}// end class

Help.. incompatiable type and cannot resolve symbol error...

I have this class Box
class Box{
     private int width;
       private int height;
       private int depth;
       private int BoxCounter;
     public void click()
     BoxCounter = 0;
}and in my main code, I'm calling it via
private Box arrBox[];All this goes fine until I try to place code in to make array empty upon a selected action by
if (color == blue) {arrBox = new Box();}Here I'm getting the error saying that its an incompatible type... it says I have Box but it requires class Box[]...(the ^ pointing at the word "new")
also, I have this
public void button()
arrBox.click()
}This returns the unable to resolve symbol error (the ^ points at the dot).... I tried changing things around but the problem persists, can someone point out where I hv gone wrong?
Many thanks

private Box arrBox[];The line above does not create an array, it only declares that the variable arrBox can refernce an array of type Box. Arrays are objects just like Box - you need a new Box[10], for example, to create the array.
if (color == blue) {arrBox = new Box();}
Here I'm getting the error saying that its an
incompatible type... it says I have Box but it
requires class Box[]...(the ^ pointing at the word
"new")As previously stated, arrBox is a reference to an array of Box, not an object instance of Box.
A lot of your trouble can be resolved by understanding how arrays work in java. Try here.
http://java.sun.com/docs/books/tutorial/java/data/arrays.html
You must create an array similar to creating any object. Next, you must create objects to go inside the array. It's difficult without knowing the rest of your code, but here goes.
private Box[] arrBox = new Box[10];
for(int index=0;index<arrBox.length;index++) {
   int color = getColor(index); //I'm making this up
   if(color == blue) arrBox[index] = new Box();
}The above code will create a new Box for any index where the color is blue. The indices where the color isn't blue are equal to null.

"cannot resolve symbol" help..

Here is a very short and simpel program that won't compile after I reinstalled java on my computer.
import java.lang.Math.*;
import java.awt.*;
public class PiTest extends Frame {
     public static void main(String[] p){
     System.out.println("testing MATHs");
     System.out.println(""+sin(10));
I get the following error:
PiTest.java:8: cannot resolve symbol
symbol : method sin (int)
location: class PiTest
System.out.println(""+sin(10));
^
[total 1553ms]
1 error
Why doesn't the compiler recognise the sine function? I have set my classpath to c:\j2sdk1.4.1_01\lib.
I don't know what I'm doing wrong...

Replace sin(10) with Math.sin(10), it should work.
import java.lang.Math.*;
import java.awt.*;
public class PiTest extends Frame {
public static void main(String[] p){
System.out.println("testing MATHs");
//System.out.println(""+sin(10));
System.out.println(""+Math.sin(10));

"cannot resolve symbol" error...please help

when itry to compile my program i get the error " cannot resolve
symbol" variable setLayout.
My program is very small. Can someone tell me why i keep
getting error?
thanx
trin.
import java.applet.*;
import java.awt.*;
public class MyProg extends Applet
     Button btnOne = new Button("One");
     Button btnTwo = new Button("Two");
     public void init()
          Panel pOne = new Panel( ) ;
          pOne.setLayout = ( new GridLayout( ));
          pOne.add(btnOne);
          pOne.add(btnTwo);
          add(pOne);

Change:
pOne.setLayout = ( new GridLayout( ));to
pOne.setLayout( new GridLayout());It's a method call, not an assignment :)

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: 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 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");

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.

Help in resolving symbol

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