Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

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

public class Main {

    public static void main(String[] a) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTextField textField = new JTextField("A TextField");
        textField.addFocusListener(new FocusListener() {
            public void focusGained(FocusEvent e) {
                displayMessage("Focus gained", e);
            }

            public void focusLost(FocusEvent e) {
                displayMessage("Focus lost", e);
            }

            void displayMessage(String prefix, FocusEvent e) {
                System.out.println(e.getID() == FocusEvent.FOCUS_FIRST);
            }
        });
        frame.add(textField, "North");
        frame.add(new JTextField(), "South");
        frame.setSize(300, 200);
        frame.setVisible(true);
    }
}