import javax.swing.*;
import java.awt.*;
public class Calculator extends JApplet{
JButton digitbuttons[];
JButton plus,minus,times,div,clear,decimal;
JTextField field;
public void init(){
digitbuttons=new JButton[10];
JPanel digits=new JPanel();
JPanel westdummy=new JPanel();
JPanel eastdummy=new JPanel();
digits.setLayout(new GridLayout(4,5,2,2));
for (int i=0;i<10;i++)
{digitbuttons[i]=new JButton(""+i);
digits.add(digitbuttons[i]);}
decimal=new JButton(".");
plus=new JButton("+");
div=new JButton("/");
minus=new JButton("-");
times=new JButton("*");
clear=new JButton("C");
digits.add(clear);
digits.add(decimal);
digits.add(plus);
digits.add(minus);
digits.add(times);
digits.add(div);
Container c=getContentPane();
c.setLayout(new BorderLayout());
field=new JTextField(30);
c.add(field,BorderLayout.NORTH);
c.add(digits,BorderLayout.CENTER);
c.add(westdummy,BorderLayout.WEST);
c.add(eastdummy,BorderLayout.EAST);
}
}