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


/*
<applet code="add.class" width =500 height=400>
</applet>
*/

public class add extends Applet implements ActionListener
{


	Button b1;
	TextField text1,text2,text3;
		
	Label label1,label2,label3;

	
	

	public void init()// Init method is used to initialise the values.
	{
	setLayout(new FlowLayout());
	setSize(100,300);
	

	label1=new Label("Enter 1st Number");
	label2=new Label("Enter 2nd Number");
	label3=new Label("Result :");
	text1=new TextField(12);
	text2=new TextField(12);
	text3=new TextField(20);
  	b1=new Button("ADD");

	add(label1);
	add(text1);
	add(label2);
	add(text2);
	add(label3);
	add(text3);
	add(b1);

	b1.addActionListener(this);

	}


	public void actionPerformed(ActionEvent e)//  Action listener method for  button.
	{
		if (e.getSource()==b1)
		{
			try{
		int n1=Integer.parseInt(text1.getText());
		int n2=Integer.parseInt(text2.getText());
		int res=n1+n2;	
		text3.setText(String.valueOf(res));
		}catch(Exception er){
			text3.setText("Invalid Input");
		}
		}
		
	}

}