Derive a class from a component and implement an action listener inside the class.

 

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

class MyButton extends JButton implements ActionListener {

  public MyButton(String text) {
    super.setText(text);
    addActionListener(this);
  }

  public void actionPerformed(ActionEvent e) {
    System.exit(0);
  }
}

public class UsingInterface {
  public static void main(String[] args) {
    MyButton close = new MyButton("Close");
    JFrame f = new JFrame();
    f.add(close);

    f.setSize(300, 200);
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  }
}

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Derive a class from a component and implement an action listener inside the class. : Swing Action « Event « Java

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