Solved

runtime error of JDialog

Posted on 2007-03-20
3
299 Views
Last Modified: 2008-01-09
I have the following code that produces a JDialog from an ActionEvent:

import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class replaceWindow extends JDialog {
            
      JLabel jlbl = new JLabel();
      JTextField jtextField = new JTextField();
      JButton jbtn = new JButton();
      
      public void replace() {
            
            add(jlbl, BorderLayout.CENTER);
            
            setLayout(new GridBagLayout());
            GridBagConstraints c = new GridBagConstraints();
            c.fill = GridBagConstraints.HORIZONTAL;
            
            jlbl = new JLabel ("0,0");
            c.weightx = 1;
            c.gridx = 0;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("1,0");
            c.weightx = 1;
            c.gridx = 1;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("2,0");
            c.weightx = 1;
            c.gridx = 2;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("3,0");
            c.weightx = 1;
            c.gridx = 3;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("4,0");
            c.weightx = 1;
            c.gridx = 4;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("5,0");
            c.weightx = 1;
            c.gridx = 5;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("6,0");
            c.weightx = 1;
            c.gridx = 6;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("7,0");
            c.weightx = 1;
            c.gridx = 7;
            c.gridy = 0;
            add(jlbl, c);
            
            jlbl = new JLabel ("0,1");
            c.weightx = 1;
            c.gridx = 0;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("Search:");
            c.weightx = 1;
            c.gridx = 1;
            c.gridy = 1;
            c.gridwidth = 2;
            add(jlbl, c);
            
            jlbl = new JLabel ("3,1");
            c.weightx = 1;
            c.gridx = 3;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("4,1");
            c.weightx = 1;
            c.gridx = 4;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("5,1");
            c.weightx = 1;
            c.gridx = 5;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("6,1");
            c.weightx = 1;
            c.gridx = 6;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("7,1");
            c.weightx = 1;
            c.gridx = 7;
            c.gridy = 1;
            add(jlbl, c);
            
            jlbl = new JLabel ("0,2");
            c.weightx = 1;
            c.gridx = 0;
            c.gridy = 2;
            add(jlbl, c);
            
            jtextField = new JTextField ();
            c.weightx = 1;
            c.gridx = 1;
            c.gridy = 2;
            c.gridwidth = 3;
            add(jtextField, c);
            
            jlbl = new JLabel ("4,2");
            c.weightx = 1;
            c.gridx = 4;
            c.gridy = 2;
            add(jlbl, c);
            
            jlbl = new JLabel ("5,2");
            c.weightx = 1;
            c.gridx = 5;
            c.gridy = 2;
            add(jlbl, c);
            
            jlbl = new JLabel ("6,2");
            c.weightx = 1;
            c.gridx = 6;
            c.gridy = 2;
            add(jlbl, c);
            
            jlbl = new JLabel ("7,2");
            c.weightx = 1;
            c.gridx = 7;
            c.gridy = 2;
            add(jlbl, c);
            
            setTitle("Replace");
            pack();
            setLocation(300, 200);
            setResizable(false);
            setVisible(true);
            setSize(400, 200);
            setDefaultCloseOperation(DISPOSE_ON_CLOSE);
      }
      
}

When the first ActionEvent takes place, the JDialog box appears, when I close the JDialog box and attempt the same ActionEvent to trigger the JDialog box I get a runtime error.

Can anyone help ?
0
Comment
Question by:Vel Eous
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 86

Expert Comment

by:CEHJ
ID: 18760521
Please post code where it's called
0
 
LVL 14

Author Comment

by:Vel Eous
ID: 18760548
Didnt relise the code I posted above was so long, sorry about that, should have trimmed it.

The code above is in a file called replaceWindow.java and the following code is in my main class:

replaceWindow replaceMethod = new replaceWindow();

toolsMenu.add(jmiReplace = new JMenuItem("Replace"));
               jmiReplace.setMnemonic('R');
               jmiReplace.setAccelerator(KeyStroke.getKeyStroke("ctrl R"));

jmiReplace.addActionListener(new mnReplace());

class mnReplace implements ActionListener {
         public void actionPerformed (ActionEvent e) {
               replaceMethod.replace();
         }
}
0
 
LVL 92

Accepted Solution

by:
objects earned 500 total points
ID: 18760750
u dispise of the dialog on close so its not available to open again
so either get gid of dispose on close
or create a new instance of replaceWindow each time

(btw, if you do the former you don't nweed to set up the dialog everytime, a simple setVisible() would suffice.)
0

Featured Post

Transaction Monitoring Vs. Real User Monitoring

Synthetic Transaction Monitoring Vs. Real User Monitoring: When To Use Each Approach? In this article, we will discuss two major monitoring approaches: Synthetic Transaction and Real User Monitoring.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Introduction Java can be integrated with native programs using an interface called JNI(Java Native Interface). Native programs are programs which can directly run on the processor. JNI is simply a naming and calling convention so that the JVM (Java…
Viewers learn about the “while” loop and how to utilize it correctly in Java. Additionally, viewers begin exploring how to include conditional statements within a while loop and avoid an endless loop. Define While Loop: Basic Example: Explanatio…
Viewers will learn about the different types of variables in Java and how to declare them. Decide the type of variable desired: Put the keyword corresponding to the type of variable in front of the variable name: Use the equal sign to assign a v…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question