class NullPointerException? Can someone please help me?

[Matt Hazan]

	class Info {
		String firstName;
		String lastName;
		int income;
		int age;
		int gender;
	}
      
        //Later in my code: array declaration, first name prompt, and trying to print out the stored
       // information which depends on if I set up everything correctly
        Info passenger[] = new Info[50];

        System.out.printf("First Name: ");
	passenger[0].firstName = userInput.next();

        System.out.println(passenger[0].firstName);

Hello,
So I declared this class in my program, I am basically trying to use it as a 'struct'. I am trying to create an array of type 'Info' which will store information about different people, so I can use it later. The program currently compiles however, I am getting a NullPointerException. Can anyone please help me understand how to fix this and why this is happening? ( i know that it is probably b/c something is not initialized correctly, or something is equal to null such as my array maybe?)

I am really having a hard time fixing this, any help will be greatly appreciated!

Thanks.

[Matt Hazan]

Also, how do I give the passenger class a constructor? Can someone please give me a simple example?

[Rob Spoor]

Are there structs in Java? Are they even called structs? That's your previous thread, with exactly the same cause of your problems, and I've already given you the answer in it.

[Rob Spoor]

Matt Hazan wrote:Also, how do I give the passenger class a constructor? Can someone please give me a simple example?

http://download.oracle.com/javase/tutorial/java/javaOO/constructors.html