import java.applet.*;
import java.awt.event.*;
import java.awt.*;
//import java.lang.*;

public class EventListeners extends Applet implements ActionListener{
	TextArea txtArea;
	String Add, Subtract,Multiply;
	int i = 10, j = 20, sum =0,Sub=0,Mul = 0,Div = 0;

	public void init(){
		txtArea = new TextArea(10,20);
		txtArea.setEditable(false);
		add(txtArea,"center");
		Button b = new Button("Add");
		Button c = new Button("Subtract");
		Button d = new Button("Multiply");
		Button e = new Button("Divide");
		b.addActionListener(this);
		c.addActionListener(this);
		d.addActionListener(this);
		e.addActionListener(this);

		add(b);
		add(c);
		add(d);
		add(e);
	}


	public void actionPerformed(ActionEvent e){
		sum = i + j;
		txtArea.setText("");
		txtArea.append("i = "+ i + "\t" + "j = " + j + "\n");
		Button source = (Button)e.getSource();
		if(source.getLabel() == "Add"){
		txtArea.append("Sum : " + sum + "\n");
		}
		
		if(i >j){
			Sub = i - j;
		}
		else{
		Sub = j - i;
		}
		if(source.getLabel() == "Subtract"){
		txtArea.append("Sub : " + Sub + "\n");
		}

		Mul = i*j;
		if(source.getLabel() == "Multiply"){
			txtArea.append("Mul = " + Mul + "\n");
		}

		if(i > j){
			Div = i / j;
		}
		else{
			Div = j / i;
		}

		if(source.getLabel() == "Divide"){
			txtArea.append("Divide = " + Div);
		}
	}
}