Noob Java Question Keep Getting NullPointerException :(

[GenghisKhan2]

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Edited by GenghisKhan2, 22 April 2018 - 09:10 PM.

[nerdist]

NullPointerException occurs when you declare a variable but did not create an object. If you attempt to dereference that variable before creating the object you get a NullPointerException

 

Let us take a look at the full code .

[RamHerHard]

i can probably help! PM if you want

[Logerlala]

Please share your code here, I can help

[FranckCastle]

You probably forgot to instantiate the objects you create (use the keyword "new"). 

 

Example of the use of the keyword "new" :

 

public class A{

         

               //attributes

 

               //constructor

               Public A(){...}

 

               //methods

}

 

public class MAIN{

 

public static void main(String args[]){

 

               A a = new A(); 

       

               //rest of the code

}

}

 

Nota Bene :

If you use arrays in your code, you must do the same manipulation, declaring them isn't enough, you should instatiate them.

 

                   private int[] myArray = new int[Constant]  //Constant is an integer already defined (The length of the table). ex : 10.

Edited by FranckCastle, 05 May 2019 - 11:42 AM.

[Zifukoro]

Share it i can help you man