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

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);



}

}

Quote:

---

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
}

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

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);

}

}

Quote:

---

//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.

Quote:

---

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