Help actionlistener in a seperate class

Hello,
Thank you thus far for yout help. I'm currently having a probelm with calling action listener form a seperate class file:
The codes are as belows:
the main class i call my action listener assaveButton = new Button("SAVE");
     saveButton.setBounds(80,350, BUTTON_WIDTH, BUTTON_HEIGHT);
     detailPanel.add(saveButton);
     saveButton.addActionListener();
and in the other class file in which i put it as a panel i put it as:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
public class ActionTPanel extends Panel{
public ActionTPanel(){
cancelButton.addActionListener (
     new ActionListener() {
          public void actionPerformed(ActionEvent e)
               RecordTFrame lala = new RecordTFrame();
               lala.show();
     saveButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
                         try{
                         Statement stmt = con.createStatement();
                         if(!tf1.getText().equals ("")){
                         String query =     "INSERT INTO HarvestFile (" +
                                             "TreeID, SegmentCode, DateOfHarvest, NumberOfTrees, NumberRemaining," +
                                                  "Revenue, ForestOfficer, Comments" +
                                                  ") VALUES ('" +
                                                  tf1.getText() + "','" +
                                                  tf.getText() + "','" +
                                                  tf2.getText() + "','" +
                                                  tf3.getText() + "','" +
                                                  tf5.getText() + "','" +
                                                  tf4.getText() + "','" +
                                                  tf6.getText() + "','" +
                                                  tf7.getText() + "')";
                         System.out.print("\nSending query: " +
                                                  con.nativeSQL (query) + "\n");
                         int result = stmt.executeUpdate(query);
                              if(result==1)
                              System.out.print("\nInsertion successful\n");
                              else{
                              System.out.print("\nInsertion failed\n");
                              tf1.setText("");
                              tf.setText("");
                              tf2.setText("");
                              tf3.setText("");
                              tf5.setText("");
                              tf4.setText("");
                              tf6.setText("");
                              tf7.setText("");
                         else
                         System.out.print("\nEnter Tree ID!");
                         stmt.close();
                         catch (SQLException sqlex){
                         sqlex.printStackTrace();
                         System.out.print(sqlex.toString() );
     resetButton.addActionListener (
     new ActionListener() {
          public void actionPerformed(ActionEvent e)
               tf.setText("");
               tf1.setText("");
               tf2.setText("");
          tf3.setText("");
          tf4.setText("");
          tf5.setText("");
          tf6.setText("");
          tf7.setText("");
     show();
public static void main( String args[] )
          final HAddFrame app = new HAddFrame();
          app.addWindowListener(
               new WindowAdapter() {
                    public void windowClosing( WindowEvent e )
                         System.exit( 0 );
I'm not sure how to call it inthe class
i hope u guys can help me!
Thanks!
-pal-
your help is greatly appreciated!

hello again!
I have another question do i have to reclare the textfields in the separate class file...
Thanks
pal

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When i compile UseMusic.java i get the following:
i can't figure it out..
Thank You for Time!
D:\java\cENG310\Ass2>javac UseMusic.java
UseMusic.java:29: cannot resolve symbol
symbol : variable middlec
location: class UseMusic
                   mm.caldis(middlec); // compute freqs
                             ^
UseMusic.java:42: cannot resolve symbol
symbol : variable middlec
location: class UseMusic
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UseMusic.java:56: caldis(java.lang.String[],double[],double) in Music cannot be appli
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UseMusic.java:81: checkvaild(java.lang.String[],java.lang.String) in Music cannot be
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UseMusic.java:86: getfreq(java.lang.String[],java.lang.String) in Music cannot be app
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5 errors
* Filename    : UseMusic.java
import iopack.Io;
import java.text.DecimalFormat;
* UseMusic this class is
public class UseMusic {
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             mm.caldis(middlec); // compute freqs
         System.out.println("\n\t************************");
         System.out.println("\t* Notes * Frequency *");
         System.out.println("\t************************");
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         for (int i = 0; i < mm.noteName.length; i ++) {
                    // display values onto screen
            System.out.println("\t* " + mm.noteName[i] + "\n");
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                        System.out.println("      " + mm.noteFreq[i] + " Hz *\n");
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               } //end of else
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               break;   // get out of while
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            } //end of else
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} // end of Class UseMusic
* Filename    : Music.java
import java.*;
public class Music
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   static double INITALMIDDLEC = 256;     // set default value of middle c to 256
   double middlec;          // user value for middlec
   String[] noteName;   // array stores name of notes
   double[] noteFreq;     // array stores freq of notes
boolean vaildstr;     // track whether entered string is vaild
   char replay;               // user's reponse to continue prompt
   boolean uContinue;     // whether or not to continue
   int sub;                         // index of searched string
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   Music () {
      String[] noteName = {"C","C#","D","D#","E","F","F#","G","G#","A","A#","B","C'"};
      double[] noteFreq = new double[noteName.length];
      middlec = INITALMIDDLEC; // default value of middlec to 256
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      temp = middlec;   //set the value of the first element to middlec
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      for (int i = 0; i < noteName.length; i++) {
         temp = noteFreq[i-1]; // save value of previous elements
         noteFreq[i] = temp + (temp * semitone);
      } //end of for
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      return middlec;   // Returns the value of middlec
   int getfreq(String[] noteName, String strkey) {
      for (int i = 0 ; i < noteName.length ; i++) {
         if (strkey.compareTo(noteName) == 0) {
sub = i;
return sub;
     double setzero(double middlec) {
          middlec = 0;
          return middlec;
String getnoteName(int index) {
return noteName[index];
double getnoteFreq(int index) {
return noteFreq[index];
boolean checkvaild(String[] noteName, String strkey) {
vaildstr = noteName.equals(strkey);
return vaildstr;
} //end of Class Music

>
What part can't you figure out? The compiler is
telling you that it can't resolve "middlec", which it
can't, because you apparently didn't define it
anywhere. Actually he did define it, but he defined it after he passed it to those methods. If that's not simply an oversight on his part, I can't begin to understand what he was thinking.

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Hope this helps
regards
Ravi

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when i compile i get this error
C:\Documents and Settings\Administrator\Desktop\Java Ref>javac TodSource.java
.\EditUrl.java:18: invalid method declaration; return type required
actionPerformed(ActionEvent e) {
^
.\EditUrl.java:28: class EditDialog is public, should be declared in a file name
d EditDialog.java
public class EditDialog extends Dialog{
^
.\EditUrl.java:8: EditUrl should be declared abstract; it does not define action
Performed(java.awt.event.ActionEvent) in EditUrl
public class EditUrl implements ActionListener{
^
.\EditUrl.java:54: cannot resolve symbol
symbol : method dispose ()
location: class CloseCross
dispose();
^
4 errors
hm, anyone can understand the problem

hi again,
sorry it takes such a long time
1. dispose() is a method normally used by frames, windows and so on
this method just only kills the frame, give the memory this frame used back to the system and makes the frame undisplayable.
So since i do not know what you want to dispose i cannot help you
2. actionperformed()
It works the following way:
every class implementing the interface ActionListener has to implement the method actionPerformed(ActionEvent e)
if you start the program you have to add this actionlistener to a graphiccomponent which can trigger an action(like buttons)
here a short example
import java.awt.*;
import java.awt.event.*;
public class Example extends Frame implements ActionListener {
public Example(){
   Button b = new Button("I am a button");
   b.addActionListener(this); // this will add our actionListener to this button
   b.setActionCommand("DoAnything"); // we need it, if we define more buttons, which uses the same listener
   add(b); // adding the button to our frame
public void actionPerformed(ActionEvent e){
if(e.getActionCommand().equals("DoAnything"))
    // insert here what you want to do
test it out

I need some help to develop the action class.

my total concept is , browse a file and upload then after i want save that file in some folder in my system with same formatte (if u browse a 1.txt file then i want to save that file same c: temp/1.txt same formate )how can i do that? i know i have to develop the code in action class but what kind of code i have to develop.
i suceed to upload the file but i dont have the idea to save that file in my system. but i dont know how can i save my file in the c:temp folder.?
please help me.

The authentication is something you can do with either https (secure the transport) or with WS-Security (Secure the message). You can add that with JDeveloper by using the context menu on a webservice.
To create a webservice:
- specify the xsd
- create the wsdl
- Generate a Java webservice using JDeveloper
- implement the class to return the content of the request.
Regards,
Lonneke

Need help calling and looping custom classes

Hi, I am writing a code with custom classes in it and another program that calls upon all of the classes in the first program. I can get the second one (L6) to call upon and execute all of the classes of the first (Foreign). However, I need the second one to loop until quit is selected from the menu on Foreign and I can't seem to figure out how to do it. Here are the codes:
L6:
public class lab6
public static void main(String[] args)
Foreign camount = new Foreign();
camount = new Foreign();
camount.get();
camount.print();
camount.intake();
camount.convert();
camount.vertprint();
System.out.println(camount);
Foreign:
import java.util.Scanner;
public class Foreign
private String country;
private int choice;
private float dollars;
private float conversionValue;
private float conversionAmount;
public Foreign()
country = "null";
choice = 0;
dollars = 0;
conversionValue = 0;
conversionAmount = 0;
public void get()
     Scanner Keyboard = new Scanner(System.in);
          System.out.println("Foreign Exchange\n\n");
System.out.println("1 = U.S. to Canada");
System.out.println("2 = U.S. to Mexico");
System.out.println("3 = U.S. to Japan");
System.out.println("4 = U.S. to Euro");
System.out.println("0 = Quit");
System.out.print("\nEnter your choice: ");
choice = Keyboard.nextInt();
public void print()
System.out.print("\nYou chose " + choice);
public void intake()
     Scanner Keyboard = new Scanner(System.in);
          if (choice >= 1 && choice <= 4)
switch (choice)
          case 1: System.out.println("\nU.S. to Canada");
                    conversionValue = 1.1225f;
                    country = ("Canadian Dollars");
                    break;
          case 2: System.out.println("\nU.S. to Mexico");
                    conversionValue = 10.9685f;
                    country = ("Mexican Pesos");
break;
          case 3: System.out.println("\nU.S. to Japan");
                    conversionValue = 118.47f;
                    country = ("Japanese Yen");
break;
          case 4: System.out.println("\nU.S. to Euro");
                    conversionValue = 0.736377f;
                    country = ("European Union Euros");
break;
               System.out.print("\nEnter U.S. dollar amount: ");
          dollars = Keyboard.nextFloat();
public void convert()
conversionAmount = conversionValue * dollars;
public void vertprint()
System.out.println("\nCountry = " + country);
System.out.println("Rate = " + conversionValue);
System.out.println("Dollars = " + dollars);
System.out.println("Value = " + conversionAmount);
public String toString()
String line;
line = "\n" + country + " " + conversionValue + " " + dollars + " " + conversionAmount;
return line;
I appreciate any help anyone can give me. This is driving me crazy. Thanks.

1. first you need to write method to get choice value from Foreign class.
simply add this method.
   public class Foreign {
      // ... Add this
      public int getChoice() {
         return choice;
   }2. Then in your main, you can obtain with previos method.
public static void main(String[] args) {
   Foreign camount = new Foreign();
   // remove this. you alredy create an instance in last statement.
   //camount = new Foreign();
   int choice = 0;
   do {
      camount.get();
      choice = camount.getChoice();
      // your process...
   } while (choice != 0);
}

Calling a method from an abstract class in a seperate class

I am trying to call the getID() method from the Chat class in the getIDs() method in the Outputter class. I would usually instantiate with a normal class but I know you cant instantiate the method when using abstract classes. I've been going over and over my theory and have just become more confused??
Package Chatroom
public abstract class Chat
   private String id;
   public String getID()
      return id;
   protected void setId(String s)
      id = s;
   public abstract void sendMessageToUser(String msg);
Package Chatroom
public class Outputter
public String[] getIDs()
     // This is where I get confused. I know you can't instantiate the object like:
        Chat users=new Chat();
        users.getID();
I have the two classes in the package and you need to that to be able to use a class' methods in another class.
Please help me :(

I have just looked over my program and realised my class names are not the most discriptive, so I have renamed them to give you a clearer picture.
package Chatroom
public abstract class Chatter
private String id;
public String getID()
return id;
protected void setId(String s)
id = s;
I am trying to slowly build a chatroom on my own. The Chatter class is a class that will be used to represent a single logged in user and the user is given an ID when he logs in through the setId and getID() methods.
package Chatroom;
import java.util.Vector;
public class Broadcaster
private Vector<Chatter> chatters = new Vector<Chatter>();
public String[] getIDs()
// code here
The Broadcaster class will keep a list of all logged-in users keeps a list of all the chats representing logged-in users, which it stores in a Vector.I am trying to use the getIDs() method to return an array of Strings comprising the IDs of all logged-in users, which is why im trying to use the getID() method from the Chat class.
I apologise if I come across as clueless, it's just I have been going through books for about 4 hours now and I have just totally lossed all my bearings

Help actionlistener in a seperate class

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