addition of two numbers in java

This sample program that I wrote in Java will compute the total of two numbers using applet as our graphical user interface. I used this code as one of my programming laboratory activities during the time I working as college professor. I hope you will find my work useful in your quest to learn Java programming.

If you  have some questions please send me an email at jake.r.pomperada@gmail.com and jakerpomperada@yahoo.com. 

My mobile number here in the Philippines is 09173084360.

  

Sample Program Output

Program Listing

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

    public class add extends Applet implements ActionListener{
      TextField text1,text2,output;
      Label label1,label2,label3,title;
      Button button,clear;
      public void init(){
        setLayout(null);


          title = new Label("Addition of Two Numbers");
          title.setBounds(80,10,140,20);
          add(title);
          title.setAlignment(title.CENTER);

        label1 = new Label("Enter Number 1: ");
        label1.setBounds(20,50,100,20);
        add(label1);

        text1 = new TextField(5);
        text1.setBounds(150,50,100,20);
        add(text1);

        label2 = new Label("Enter Number 2: ");
        label2.setBounds(20,90,100,20);
        add(label2);

        text2 = new TextField(5);
        text2.setBounds(150,90,100,20);
        add(text2);

        label3 = new Label("Sum of Two Numbers: ");
        label3.setBounds(20,130,130,20);
        add(label3);

        output = new TextField(5);
        output.setBounds(150,130,100,20);
        add(output);

        button = new Button("Sum");
        button.setBounds(150,170,100,20);
        add(button);

        clear = new Button("Clear");
        clear.setBounds(280,170,100,20);
        add(clear);

        button.addActionListener(this);
        clear.addActionListener(this);


        }
        public void actionPerformed(ActionEvent ae){
        int num1=Integer.parseInt(text1.getText());
        int num2=Integer.parseInt(text2.getText());
        int sum=num1+num2;
        output.setText(Integer.toString(sum));
            if(ae.getSource() == clear)
            {
                 text1.setText("");
              text2.setText("");
               output.setText("");
               text1.requestFocus();
    }
}
}