TextFieldExample2.java

import javax.swing.*;
import java.awt.event.*;
public class TextFieldExample2 implements ActionListener {
	JTextField tf1,tf2,tf3;
	JButton b1,b2;
	JLabel l1,l2,l3;
	TextFieldExample2(){
		JFrame f = new JFrame();
		tf1 = new JTextField();
		tf1.setBounds(120,50,40,20);
		l1 = new JLabel("First Number");
		l1.setBounds(30,50,100,20);
		tf2 = new JTextField();
		tf2.setBounds(140,100,40,20);
		l2= new JLabel("Second number");
		l2.setBounds(30,100,100,20);
		tf3 = new JTextField();
		tf3.setBounds(120,150,40,20);
		tf3.setEditable(false);
		l3 = new JLabel("Result");
		l3.setBounds(30,150,80,20);
		b1 = new JButton("sum");
		b1.setBounds(50,200,80,50);
		b2=new JButton("difference");
		b2.setBounds(150,200,100,50);
		b1.addActionListener(this);
		b2.addActionListener(this);
		f.add(tf1);
		f.add(tf2);
		f.add(tf3);
		f.add(b1);
		f.add(b2);
		f.add(l1);
		f.add(l2);
		f.add(l3);
		f.setSize(300,300);
		f.setLayout(null);
		f.setVisible(true);
	}
	public void actionPerformed(ActionEvent e) {
		String s1 = tf1.getText();
		String s2 = tf2.getText();
		int a = Integer.parseInt(s1);
		int b = Integer.parseInt(s2);
		int c =0;
		if(e.getSource()==b1) {
			c=a+b;
		}
		else if(e.getSource()==b2) {
			c=a-b;
		}
		String result = String.valueOf(c);
		tf3.setText(result);
	}
public static void main(String args[]) {
	new TextFieldExample2();
}

}