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Textfield example for addition in java



                  Program of addition in awt (Textfield)

PROGRAM-
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
/*
            <applet code="Calculate" height=200 width=200>
            </applet>
*/
public class Calculate extends Applet implements ActionListener
{
            TextField txta,txtb,txtc;
            Button b1,b2;
            public void init()
            {
                        Label l1=new Label("Enter the value of a        :");
                        add(l1);
                        txta=new TextField(20);
                        add(txta);
                        Label l2=new Label("Enter the value of b        :");
                        add(l2);
                        txtb=new TextField(20);
                        add(txtb);
                        Label l3=new Label("Result                               :");
                        add(l3);
                        txtc=new TextField(20);
                        add(txtc);
                        txtc.setEditable(false);
                        b1=new Button("Add");
                        add(b1);
                        b1.addActionListener(this);
                        b2=new Button("Reset");
                        add(b2);
                        b2.addActionListener(this);
            }
            public void actionPerformed(ActionEvent ae)
            {
                        if(ae.getSource()==b1)
                        {
                        /*add the numbers */
                                    int val1=Integer.parseInt(txta.getText());
                                    int val2=Integer.parseInt(txtb.getText());
                                    int val3=val1+val2;
                                    txtc.setText(val3+"");
                        }
                        else
                        {
                                    /*clear all the text boxes*/
                                    txta.setText("");
                                    txtb.setText("");
                                    txtc.setText("");
                        }
            }
}

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