Math.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class MathOperation implements ActionListener {

    JLabel j1, j2, j3;
    JTextField jtf1, jtf2, jtf3;
    JButton jadd, jsub;

    MathOperation() {
        JFrame jf = new JFrame("Math Operation");
        jf.setSize(400, 300);
        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jf.setLayout(null);

        j1 = new JLabel("First Number:");
        j2 = new JLabel("Second Number:");
        j3 = new JLabel("Result:");

        j1.setBounds(30, 30, 100, 25);
        j2.setBounds(30, 70, 100, 25);
        j3.setBounds(30, 110, 100, 25);


        jtf1 = new JTextField();
        jtf2 = new JTextField();
        jtf3 = new JTextField();
        jtf3.setEditable(false);

        jtf1.setBounds(140, 30, 150, 25);
        jtf2.setBounds(140, 70, 150, 25);
        jtf3.setBounds(140, 110, 150, 25);

        jadd = new JButton("ADD");
        jsub = new JButton("SUB");

        jadd.setBounds(80, 160, 80, 30);
        jsub.setBounds(180, 160, 80, 30);


        jadd.addActionListener(this);
        jsub.addActionListener(this);


        jf.add(j1);
        jf.add(j2);
        jf.add(j3);
        jf.add(jtf1);
        jf.add(jtf2);
        jf.add(jtf3);
        jf.add(jadd);
        jf.add(jsub);


        jf.setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent ae) {
        try {
            int x = Integer.parseInt(jtf1.getText());
            int y = Integer.parseInt(jtf2.getText());
            int result;

            if (ae.getSource() == jadd) {
                result = x + y;
            } else {
                result = x - y;
            }

            jtf3.setText(String.valueOf(result));
        } catch (NumberFormatException e) {
            jtf3.setText("Invalid Input");
        }
    }
}

public class Math {
    public static void main(String[] args) {
        new MathOperation();
    }
}