help

Hi. Currently im using JOptionPane to create the program. This is the codes.

import javax.swing.JOptionPane;


public class Homework3
{

public static void main(String args[]){

int number;
String message1 = "Please enter the positive number"+ "\n";
String message2 = "Please enter the positive number, not negative number"+ "\n";
String message3 = "Please enter in numbers, not letters"+ "\n";
String num, outputMessage ;

try{
num = JOptionPane.showInputDialog(message1);
number = Integer.parseInt(num);

if (number<0)
throw new IllegalArgumentException();
outputMessage = "The number was"+ number ;
JOptionPane.showMessageDialog(null,outputMessage);
}

catch( NumberFormatException e)
{
JOptionPane.showMessageDialog(null,message3);
}

catch ( IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null,message2);
}

System.exit(0);
}
}


The problem is, when I click the cancel button, it shows the message "Please enter in numbers, not letters". I'm so confusing that why the program shows this message and not closing when I click the cancel button. Also, the out put will shows in this way.

Lets say the output is 1234.

The number was 1234
The digits are
1
2
3
4

How do I allign the message in this way??? please help me!!!

it shows message2 in the exception

Code:

---

catch ( IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null,message2);
}

---

maybe change this to

Code:

---

catch ( IllegalArgumentException e)
{
System.err.println(e.getMessage());
e.printStackTrace();
}

---

or, if you want the dialog thing,

Code:

---

catch ( IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null,e.getMessage());
}

---

Hi. I need help for this program.

import javax.swing.JOptionPane;


public class Homework3
{

public static void main(String args[]){

int number;
String message1 = "Please enter the positive number"+ "\n";
String message2 = "Please enter the positive number, not negative number"+ "\n";
String message3 = "Please enter in numbers, not letters"+ "\n";
String num, outputMessage ;

try{
num = JOptionPane.showInputDialog(message1);
number = Integer.parseInt(num);

if (number<0)
throw new IllegalArgumentException();
outputMessage = "The number was"+ number ;
JOptionPane.showMessageDialog(null,outputMessage);
}

catch( NumberFormatException e)
{
JOptionPane.showMessageDialog(null,message3);
}

catch ( IllegalArgumentException e)
{
JOptionPane.showMessageDialog(null,message2);
}

System.exit(0);

}
}

So far its working but I want the Input to arrange in positive integer in range of 0 to 9999. It accepts the 4 digits of positive integer. and also once I put the positive integer in Input, the output has to be showing in this way.

The number was 1234
The digits are
1
2
3
4

How to write this program? please help me!!!!!!!

Dnt repost the same question. It only makes you desperate for the answer, which is definetly a turn off for ppl to answer your question.

reposted: http://www.java-forums.org/new-java/...t-due-tmr.html. Locking