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

public class GUI3 extends Applet {
        TextField xField;
        TextField yField;
        TextField answer;
        Button    eqButton;
        Label     plusLabel;

	void eqButton_Clicked(Event event) {
                         // do this when the eqButton clicked,
          int x=0,y=0; 
     
          // get the value of xField
          String xS= xField.getText();
          try{   x= Integer.parseInt(xS);} 
          catch( NumberFormatException e) 
             { answer.setText("wrong number format!");}

          // get the value of yField
          String yS= yField.getText();
          try{   y= Integer.parseInt(yS);} 
          catch( NumberFormatException e) 
             { answer.setText("wrong number format!");}

          // do the addition and display its result
          int ans=x+y;
          answer.setText(""+ans);
          repaint();
	}

	public void init() {

                // Layouting the gui parts.

		setLayout(null);  // Parts layout follows the geometric
                                  // parameters of reshape.

                xField = new TextField();
                xField.reshape(20,20,60,30);
                add(xField);

                yField = new TextField();
                yField.reshape(110,20,60,30);
                add(yField);
                
                answer = new TextField();
                answer.reshape(220,20,60,30);
                add(answer);
                
                eqButton = new Button("=");
                eqButton.reshape(180,20,30,30);
                add(eqButton);

                plusLabel = new Label("+");
                plusLabel.reshape(90,20,20,30);
                add(plusLabel);

	}

	public void actionPerformed(ActionEvent event) {
		if (event.getSource() == eqButton)
                         {
			 eqButton_Clicked(event);
			
		}
		
	}

}
/*<Applet code=GUI3.class width=400 height=400></Applet>*/