Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;

import javax.swing.JFrame;
import javax.swing.JTextField;

public class Main {
    public static void main(String[] argv) throws Exception {
        JTextField component = new JTextField();
        component.addFocusListener(new MyFocusListener());
        JFrame f = new JFrame();

        f.add(component);
        f.setSize(300, 300);
        f.setVisible(true);

    }
}

class MyFocusListener extends FocusAdapter {
    public void focusGained(FocusEvent evt) {
        System.out.println("component gained the focus");
    }

    public void focusLost(FocusEvent evt) {
        System.out.println("component lost the focus");
    }
}