package a;

import java.awt.event.*;
import java.awt.*;
import java.awt.Button;
import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.Frame;
import java.awt.Label;
import javax.swing.*;
//2
public class S0754044_3 extends JFrame implements ActionListener{
static S0754044_3 frm1 = new S0754044_3();
static JLabel Label = new JLabel("Java");
static JButton btn = new JButton("1");
static JButton btn1 = new JButton("2");
static JButton btn2 = new JButton("3");
static JButton btn3 = new JButton("4");
static JButton btn4 = new JButton("5");
static JButton btn5 = new JButton("6");
static JButton btn6 = new JButton("7");
static JButton btn7 = new JButton("8");
static JButton btn8 = new JButton("9");
static JButton btn9 = new JButton("0");
static JButton btn0 = new JButton("+");
static JButton btnex = new JButton("=");

static int sum = 0;
static int a =0;
static int b;
static int c;
static int total;
static JTextField txt = new JTextField();

public static void main(String[] args) {
Container container = frm1.getContentPane();
frm1.setLayout(null);
btn1.addActionListener(frm1);
btn2.addActionListener(frm1);
btn3.addActionListener(frm1);
btn4.addActionListener(frm1);
btn5.addActionListener(frm1);
btn6.addActionListener(frm1);
btn7.addActionListener(frm1);
btn8.addActionListener(frm1);
btn.addActionListener(frm1);
btn9.addActionListener(frm1);
btn0.addActionListener(frm1);
btnex.addActionListener(frm1);

//Label.setBounds(150,150,100,50);
btn.setBounds(50,100,50,50);
btn1.setBounds(100,100,50,50);
btn2.setBounds(150,100,50,50);
btn3.setBounds(50,150,50,50);
btn4.setBounds(100,150,50,50);
btn5.setBounds(150,150,50,50);
btn6.setBounds(50,200,50,50);
btn7.setBounds(100,200,50,50);
btn8.setBounds(150,200,50,50);
btn9.setBounds(50,250,50,50);
btn0.setBounds(100,250,50,50);
btnex.setBounds(150,250,50,50);

frm1.setSize(280,340);
txt.setBounds(50,48,150,27);
container.add(txt);
container.add(Label);
container.add(btn);
container.add(btn1);
container.add(btn2);
container.add(btn3);
container.add(btn4);
container.add(btn5);
container.add(btn6);
container.add(btn7);
container.add(btn8);
container.add(btn9);
container.add(btn0);
container.add(btnex);
txt.setHorizontalAlignment(JTextField.RIGHT);



frm1.setLocation(5,5);
frm1.add(Label);
frm1.setVisible(true);
frm1.setTitle("text");
frm1.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);}});
}

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
if(a==0)
{
if(e.getSource()==btn)
{
sum*=10;
sum+=1;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()== btn1)
{
sum*=10;
sum+=2;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn2)
{
sum*=10;
sum+=3;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn3)
{
sum*=10;
sum+=4;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn4)
{
sum*=10;
sum+=5;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn5)
{
sum*=10;
sum+=6;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn6)
{
sum*=10;
sum+=7;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn7)
{
sum*=10;
sum+=8;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn8)
{
sum*=10;
sum+=9;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn9)
{
sum*=10;
sum+=0;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn0)
{
String str =String.valueOf(sum);
    b = Integer.parseInt(String.valueOf(str));
    sum = 0;
    a=1;
}
}
else if(a==1)
{
if(e.getSource()==btn)
{
sum*=10;
sum+=1;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()== btn1)
{
sum*=10;
sum+=2;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn2)
{
sum*=10;
sum+=3;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn3)
{
sum*=10;
sum+=4;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn4)
{
sum*=10;
sum+=5;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn5)
{
sum*=10;
sum+=6;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn6)
{
sum*=10;
sum+=7;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn7)
{
sum*=10;
sum+=8;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn8)
{
sum*=10;
sum+=9;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn9)
{
sum*=10;
sum+=0;
String str =String.valueOf(sum);
txt.setText(str);
}
if(e.getSource()==btn0||e.getSource()==btnex)
{
String str =String.valueOf(sum);
   c = Integer.parseInt(String.valueOf(str));
   total +=b;
   total +=c;
txt.setText(String.valueOf(total));
   sum = 0;
   a=0;
}
}
}
}