Java awt program to create a calculator
In this program, You will learn how to create a simple calculator using awt in java.
20 = 10 + 10
10 = 20 - 10Example: How to create a simple calculator using awt in java.
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Label;
import java.awt.TextField;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
class Test implements ActionListener {
Button b1, b2, b3, b4;
TextField t1, t2;
Label lb3;
Frame f;
Test() {
f = new Frame("Simple awt Calculator");
t1 = new TextField();
t1.setBounds(90, 50, 150, 30);
f.add(t1);
t2 = new TextField();
t2.setBounds(90, 80, 150, 30);
f.add(t2);
lb3 = new Label("Result :");
lb3.setBounds(90, 140, 150, 30);
f.add(lb3);
b1 = new Button("+");
b1.setBounds(50, 200, 100, 30);
f.add(b1);
b2 = new Button("-");
b2.setBounds(150, 200, 100, 30);
f.add(b2);
b3 = new Button("*");
b3.setBounds(250, 200, 100, 30);
f.add(b3);
b4 = new Button("/");
b4.setBounds(350, 200, 100, 30);
f.add(b4);
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
f.setLayout(null);
f.setSize(600, 500);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e) {
int a = Integer.parseInt(t1.getText());
int b = Integer.parseInt(t2.getText());
int c = 0;
if (e.getSource().equals(b1)) {
c = a + b;
} else if (e.getSource().equals(b2)) {
c = a - b;
} else if (e.getSource().equals(b3)) {
c = a * b;
} else if (e.getSource().equals(b4)) {
c = a / b;
}
lb3.setText(String.valueOf("Result is : " + c));
}
public static void main(String args[]) {
Test t = new Test();
}
}
Output:
