import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class sample80 extends Applet{
Button btnCulc;
TextField txtA,txtB,txtAnswer;
Label lblPlus;
public void init(){
btnCulc=new Button("=");
btnCulc.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent ae){

int intAnSwer = Integer.parseInt(txtA.getText())
+ Integer.parseInt(txtB.getText());
txtAnswer.setText(Integer.toString(intAnswer));
}
});
txtA = new TextField("0",3);
txtB = new TextField("0",3);
lblPlus = new Label("+");
txtAnswer = new TextField("0",5);

add(txtA);
add(lblPlus);
add(txtB);
add(btnCulc);
add(txtAnswer);
}
}