Java-Gaming.org    
Featured games (79)
games approved by the League of Dukes
Games in Showcase (477)
Games in Android Showcase (109)
games submitted by our members
Games in WIP (536)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  NullPointer when using ArrayList  (Read 426 times)
0 Members and 1 Guest are viewing this topic.
Offline Reck

Senior Newbie





« Posted 2012-11-30 21:42:18 »

I am trying to make an arraylist of players in my game. However, i get a NullPointer when trying to add a player (string for testing purposes), in the init method. Here's the code:

1  
2  
3  
4  
5  
6  
7  
8  
9  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
public class Chat extends BasicGame{
   
    private Board board;
    private Player player;
    private ArrayList<String> testList;
    private mySQL database;
 
    public Chat()
    {
        super("MovingSystem");
    }
   
    @Override
    public void init(GameContainer gc) throws SlickException {
        this.player = new Player("Patrick");
        this.board = new Board();
       
        testList.add("Test");
    }


Why is it failing?
Offline Regenuluz
« Reply #1 - Posted 2012-11-30 21:45:30 »

Uhm, a little more info is required ^^

Where does it get the nullpointer exception?
Offline matheus23

JGO Kernel


Medals: 106
Projects: 3


You think about my Avatar right now!


« Reply #2 - Posted 2012-11-30 21:45:50 »

You first have to create the ArrayList:

1  
testList = new ArrayList<String>();


EDIT: @Regenuluz:
Muhahaha! Cheesy
My Error-finding eye jumps in. At first I thought you'd be faster at reporting the error Grin

See my:
    My development Blog:     | Or look at my RPG | Or simply my coding
http://matheusdev.tumblr.comRuins of Revenge  |      On Github
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline Regenuluz
« Reply #3 - Posted 2012-11-30 21:46:40 »

You first have to create the ArrayList:

Haha, I totally didn't notice that it wasn't initialized xD Good catch.

Offline matheus23

JGO Kernel


Medals: 106
Projects: 3


You think about my Avatar right now!


« Reply #4 - Posted 2012-11-30 21:46:55 »

EDIT inception

See my:
    My development Blog:     | Or look at my RPG | Or simply my coding
http://matheusdev.tumblr.comRuins of Revenge  |      On Github
Offline Reck

Senior Newbie





« Reply #5 - Posted 2012-11-30 21:52:25 »

You first have to create the ArrayList:

1  
testList = new ArrayList<String>();


EDIT: @Regenuluz:
Muhahaha! Cheesy
My Error-finding eye jumps in. At first I thought you'd be faster at reporting the error Grin

Obiously! I guess i've been looking for too long at this code. :-D Thank you!
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

CogWheelz (15 views)
2014-08-01 22:53:16

CogWheelz (15 views)
2014-08-01 22:51:43

CopyableCougar4 (15 views)
2014-08-01 19:37:19

CogWheelz (19 views)
2014-07-30 21:08:39

Riven (27 views)
2014-07-29 18:09:19

Riven (16 views)
2014-07-29 18:08:52

Dwinin (14 views)
2014-07-29 10:59:34

E.R. Fleming (35 views)
2014-07-29 03:07:13

E.R. Fleming (13 views)
2014-07-29 03:06:25

pw (44 views)
2014-07-24 01:59:36
Resources for WIP games
by CogWheelz
2014-08-01 18:20:17

Resources for WIP games
by CogWheelz
2014-08-01 18:19:50

List of Learning Resources
by SilverTiger
2014-07-31 18:29:50

List of Learning Resources
by SilverTiger
2014-07-31 18:26:06

List of Learning Resources
by SilverTiger
2014-07-31 13:54:12

HotSpot Options
by dleskov
2014-07-08 03:59:08

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:58:24

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:47:22
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!