Need help with If the user hits Cancel on either first or last name, show the error

**chonch** · February 7th, 2011, 04:05 AM

i know its a if and loop but not sure what so far i have this

//CIS 226 Assignment 2
//The GUI - Assign2
// - 02/02/2011

import javax.swing.JOptionPane;

public class Assign2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String name = JOptionPane.showInputDialog("Please enter your first name:");
String lastname = JOptionPane.showInputDialog("Please enter your last name");
JOptionPane.showMessageDialog(null, "Hello, " + name +(" ") +lastname+ ", \n Welcome to CIS 226." );

//For extra credit

JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

}

}

**DanBrown** · February 7th, 2011, 04:36 AM

public static void main(String[] args) {
// TODO Auto-generated method stub
String name = JOptionPane.showInputDialog("Please enter your first name:");
String lastname = JOptionPane.showInputDialog("Please enter your last name");
JOptionPane.showMessageDialog(null, "Hello, " + name +(" ") +lastname+ ", \n Welcome to CIS 226." );

//For extra credit

JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

}

when user will click on cancel button null is assigned into the variable.name or lastname

if(name.equals(null) || lastname.equals(null))
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

public static void main(String[] args) {
// TODO Auto-generated method stub
String name = JOptionPane.showInputDialog("Please enter your first name:");
String lastname = JOptionPane.showInputDialog("Please enter your last name");

if(name.equals(null) || lastname.equals(null))
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

else
JOptionPane.showMessageDialog(null, "Hello, " + name +(" ") +lastname+ ", \n Welcome to CIS 226." );

//For extra credit
}

**chonch** · February 7th, 2011, 03:08 PM

thanks i saw the name = null in my book but i think i was missing the null in my script. but thanks again

**chonch** · February 7th, 2011, 03:17 PM

i have it like this but when i hit cancel on both name and last name i still get the null message " hello welcome, null null, to cis226. whats wrong?

//CIS 226 Assignment 2
//The GUI - Assign2
// - 02/02/2011

import javax.swing.JOptionPane;

public class Assign2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String name = JOptionPane.showInputDialog("Please enter your first name:");
String lastname = JOptionPane.showInputDialog("Please enter your last name");
JOptionPane.showMessageDialog(null, "Hello, " + name +(" ") +lastname+ ", \n Welcome to CIS 226." );

//For extra credit

if(name.equals(null) || lastname.equals(null))
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

}

}

**DanBrown** · February 8th, 2011, 06:02 AM

//For extra credit

if(name.equals(null) || lastname.equals(null))
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);
else
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

}

you haven't seen the code i had given earlier carefully, welcome message should be in else part.

if(name.equals(null) || lastname.equals(null))
JOptionPane.showMessageDialog(null, "Sorry, you have to enter your name to enroll into CIS 226.", "Error ", JOptionPane.ERROR_MESSAGE);

else
JOptionPane.showMessageDialog(null, "Hello, " + name +(" ") +lastname+ ", \n Welcome to CIS 226." );

And please mark this thread solved , if your problem is solved

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