Calculator Program using jFrame
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simple calculator program in java using frame
simple calculator program in java source code
write a code to create simple calculator using swing component
import javax.swing.*;
import java.awt.event.*;
public class TextFieldExample extends JFrame implements ActionListener{
JTextField tf1,tf2,tf3;
JButton b1,b2;
//declaration of control
TextFieldExample(){
JFrame f= new JFrame("Button click demo");
//
tf1=new JTextField();
tf1.setBounds(50,50,150,20);
tf2=new JTextField();
tf2.setBounds(50,100,150,20);
tf3=new JTextField();
tf3.setBounds(50,150,150,20);
tf3.setEditable(false);
b1=new JButton("+");
b1.setBounds(50,200,50,50);
b2=new JButton("-");
b2.setBounds(120,200,50,50);
b1.addActionListener(this); // event handing power
b2.addActionListener(this);
f.add(tf1);f.add(tf2);f.add(tf3);f.add(b1);f.add(b2);
f.setSize(300,300);
f.setLayout(null);
f.setVisible(true);
f.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
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 TextFieldExample();
} }