URGENT PLEASE

[ghazanfar khan]

Actaully what i am doing i ve one internal frame in whihc i am using JSplitPane, so i am calling two different classes in that. So what i am trying to do that if i click class 1 button1 it also call the class 2 button 2 also. So that i update my JTable.

But class1 and Class2 are separate classes.

Please.....help me

thanks

[Craig Wood]

There are a lot of ways to link classes together so that they can communicate among one another. An easy way is to pass a reference from one to the other. Usually you do this in the class that instantiates and assembles the two. CommTest puts the two classes Left and Right together and is a logical place to pass the reference of one to the other.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class CommTest
{
    public CommTest()
    {
        Right right = new Right();
        Left left = new Left(right);
        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
                                              left, right);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(splitPane);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    public static void main(String[] args)
    {
        new CommTest();
    }
}
 
class Left extends JPanel
{
    Right right;
    int count;
 
    public Left(Right r)
    {
        right = r;
        count = 0;
        JButton button = new JButton("communicate");
        button.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                right.ta.append("message " + ++count + "\n");
            }
        });
        add(button);
    }
}
 
class Right extends JPanel
{
    JTextArea ta;
 
    public Right()
    {
        ta = new JTextArea();
        setLayout(new BorderLayout());
        add(new JScrollPane(ta));
    }
}

[ghazanfar khan]

Thank you ver much! i am new to swing so little bit confused and ....
thanks once again

[ghazanfar khan]

Once again,
Craig , consider your example. let suppose class Right also has JButton. I want to call from class Left(JButton) action performed to class Right actionperformed by using Left class JButton.

Thanks, i looking forwar you reply !

[Craig Wood]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class CommTest
{
    public CommTest()
    {
        Right right = new Right();
        Left left = new Left(right);
        JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,
                                              left, right);
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(splitPane);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
 
    public static void main(String[] args)
    {
        new CommTest();
    }
}
 
class Left extends JPanel
{
    Right right;
 
    public Left(Right r)
    {
        right = r;
        JButton button = new JButton("communicate");
        button.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                right.printMessage();
            }
        });
        add(button);
    }
}
 
class Right extends JPanel
{
    JTextArea ta;
    int count;
 
    public Right()
    {
        count = 0;
        JButton button = new JButton("print message");
        button.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                printMessage();
            }
        });
        JPanel panel = new JPanel();
        panel.add(button);
        ta = new JTextArea();
        setLayout(new BorderLayout());
        add(panel, "North");
        add(new JScrollPane(ta));
    }
 
    public void printMessage()
    {
        ta.append("message " + ++count + "\n");
    }
}

[ghazanfar khan]

Thanks Craig