how to use mouse click event

Question

Hi i have a class where i am using mouseclick event i want to call another class when i click from my mouse

     MouseListener mouseListener = new MouseAdapter() {
  public void mouseClicked(MouseEvent mouseEvent) {
    JList theList = (JList) mouseEvent.getSource();
    if (mouseEvent.getClickCount() == 2) {
      int index = theList.locationToIndex(mouseEvent.getPoint());
      if (index >= 0) {
        Object o = theList.getModel().getElementAt(index);
      //  System.out.println("Double-clicked on: " + o.toString());
         String a=o.toString();


                 LiistSelection.setListIndex(a);
                System.out.println(LiistSelection.getListIndex());
                new MyGui4();
      }
    }
  }
};

i want to call this class when user click on list then new window should open

here is my class mygui4.java

public class MyGui4 extends JFrame
{
JLabel jLabel1;


Container pane;

 private static ResultSet resultSet = null;
 public void Gui(  )
  {
      {
getContentPane().setBackground(new java.awt.Color(255,153,51));
} 
 this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
Container c = getContentPane();

      setUndecorated(true);
      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
      setBounds(0,0,screenSize.width, screenSize.height);
ImageIcon image = new ImageIcon("E:\\SOFTWARE\\TrainPIS\\res\\drawable\\a0.png");
       Border border = LineBorder.createGrayLineBorder();
       jLabel1 = new JLabel(image);
       jLabel1.setBorder(border);
      jLabel1.setBackground(Color.red);
     c.add(jLabel1);
     setLayout(null);
  }

  public static void main( String[] args )
  {
      final MyGui4 frame = new MyGui4();

     frame.Gui();

      frame.setVisible(true);

  }
}

Be a bit more specific and also format your code properly :) — Crystal Meth, Mar 15 '14 at 05:57
question is that when i click on list then it should return index value and my another class should call which is a jframe window — , Mar 15 '14 at 05:58
i am able to get index value but don know how can i call my another class — , Mar 15 '14 at 06:00
I fail to see what the problem is. Calling a method of another class and passing a value as a parameter is Java 101... — MadProgrammer, Mar 15 '14 at 06:10
have you tried creating an instance of that class (where in the method you to use lies) to this class? — Mestica, Mar 15 '14 at 06:21
Please edit your question (more detailed) so that it will be more likely answered. — Mestica, Mar 15 '14 at 06:23
@@@Ralf17...i updated my one more class which i want to call on mouse click event — , Mar 15 '14 at 06:31

score 0 · Answer 1 · answered Mar 15 '14 at 06:31

You want to Create a object of another Class and call a function using a object.

  class second 
      { 
       //.....
       public void function()
          {
       //........
          }
       public void function(int index)
         {
       //..........
         }
     }
    second s=new second();
    s.function()//calling function 
    int i=10;
    s.function(i)//calling function with parameter

Try This Example :

    import javax.swing.*;
    import java.awt.event.*;
    import java.awt.*;
    class m  extends JFrame 
     {
      String s="The Value of List is  10";
      m()
        {
        setVisible(true);
        pack();
        setLayout(null);
        JButton b=new JButton("Click to Open another form");
        b.setBounds(10,10,200,40);
        add(b);
        b.addMouseListener(new MouseAdapter() 
            {
            public void mouseClicked(MouseEvent e)
              {
                  new s(s);//calling another class contructor
              }
              });
           }
          public static void main (String[] args) 
          {
           new m();
          } 
       }

   class s extends JFrame
   {
     s(String s)
     { 
      setVisible(true);
      setSize(100,100);
      setTitle(s);
      }
   }

enter image description here Click The button Another Class and Open The Window

score 0 · Answer 2 · answered Mar 15 '14 at 15:20

It looks to me like you are tying to invoke the class MyGui4 from the command line when you start the JVM or from another application when you click on the JList, If so then the code needs to be the same in both places.

When invoked from the command line the main() method is invoked which in turn invokes 3 lines of code:

final MyGui4 frame = new MyGui4();
frame.Gui();
frame.setVisible(true);

When you invoke the code when clicking on the JList you invoke 1 line of code:

new MyGui4();

Can you tell me what the difference is?

Of course I still don't understand the point of this code because none of the methods in your MyGui4 class accept a parameter. So it doesn't matter which item in the JList you click on you will still display the same GUI with the same information. You need to pass the selected object from your JList to your GUI.

how to use mouse click event

2 Answers2