InnerClass.java Source code

Introduction

Here is the source code for InnerClass.java

Source

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

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

public class InnerClass {

    class ButtonListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            System.exit(0);
        }
    }

    public InnerClass() {
        JButton close = new JButton("Close");
        ButtonListener listener = new ButtonListener();
        close.addActionListener(listener);

        JFrame f = new JFrame();
        f.add(close);

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

    public static void main(String[] args) {
        new InnerClass();
    }
}