Experiment No: 4 Write a Java program that creates a user interface to perform integer divisions. The user enters two numbers in the text fields, Num1 and Num2. The division of Num1 and Num 2 is displayed in the Result field when the Divide button is clicked. If Num1 or Num2 were not an integer, the program would throw a Number Format Exception. If Num2 were Zero, the program would throw an Arithmetic Exception. Display the exception in a message dialog box.

 Program:

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

/*

<applet code="DivApplet" width=350 height=300>

</applet>

*/

public class DivApplet extends JApplet implements ActionListener{

JTextField number1,number2,result;

JButton divide;

public void init(){

try

{

SwingUtilities.invokeAndWait(

new Runnable() {

public void run() {

makeGUI();

}

});

}

catch (Exception exc)

{

System.out.println("Can't create because of " + exc);

}

}

private void makeGUI()

{

setLayout(new FlowLayout());

Label number1p = new Label("Number1: ",Label.RIGHT);

Label number2p = new Label("Number2: ",Label.RIGHT);

number1= new JTextField(20);

number2 = new JTextField(20);

result = new JTextField(20);

divide = new JButton("Divide");

add(number1p);

add(number1);

add(number2p);

add(number2);

add(result);

add(divide);

divide.addActionListener(this);

}

public void actionPerformed(ActionEvent e){

String snumber1,snumber2;

snumber1 = number1.getText();

snumber2 = number2.getText();

try{

int number1 = Integer.parseInt(snumber1);

int number2 = Integer.parseInt(snumber2);

if(number2==0)

JOptionPane.showMessageDialog(null, "Division by zero not defined.");

else{

double r = (double)number1/number2;

result.setText(((Double)r).toString());

}

}

catch(NumberFormatException ne)

{

JOptionPane.showMessageDialog(null,"Enter a number");

}

}

}

Execution:

C:\Users\vits\Desktop\java>javac DivApplet.java

C:\Users\vits\Desktop\java>appletviewer DivApplet.java

Output: