October 12, 2008 02:15pm pdt

My Account

Top 15 Experts

Overall Top Experts

1objects 9,825,466
2CEHJ 8,344,317
3zzynx 1,588,876
4mayankea... 1,435,908
5TimYates 1,319,443
6girionis 1,019,787
7sciuriware 963,522
8Ajay-Singh 742,344
9ksivananth 577,491
10heyhey_ 515,764
11aozarov 483,814
12Javatm 456,951
13jim_cakalic 421,656
14orangehe... 393,681
15hoomanv 378,789

	[x] Attachment Details

NullPointerException ???

[x]

The Solution Rating System

With so many solutions, how can you tell which solutions are most likely to help you and which ones are not? To provide you with a tool to use, we rate our solutions based on various elements that most accurately determine if a solution is a quality solution. To explain what factors affect the solution rating, here are the elements we take into consideration when formulating our solution rating.

The Grade of the Solution
The Zone Rank of the Expert Providing the Solution
The Number of Author and Expert Comments
The Number of Experts Contributing
The Feedback of the Community

Your Input Matters
Because of the way the system is set up, the most important variable in this equation is you. As a member of Experts Exchange, you are able to cast your vote on the quality of the solutions in regard to how complete, accurate, helpful and easy to understand each solution is. When you provide your feedback, each rating is adjusted accordingly. So, if you see a solution that has a poor rating that you think is a good solution, let us know by rating it. As you do, the rating will be adjusted and will become more accurate for other members of our site.

If you have any suggestions that you would like to make for our rating system, please ask a question in the Suggestions Zone of Community Support.

Thank you!

8.4

Zones: Java Programming Language, Programming Languages

Hello Experts,

I strongly need your assistance about this error:
Exception in thread "main" java.lang.NullPointerException
at MovingTilesApp.<init>(MovingTilesApp.java:47)
at LODServer.main(LODServer.java:358)

Thanks in advance for any help!

         
           
             1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83:
84:
85:
86:
87:
88:
89:
90:
91:
92:
93:
94:
95:
96:
97:
98:
99:
100:
101:
102:
103:
104:
105:
106:
107:
108:
109:
110:
111:
112:
113:
114:
115:

           
           
             //MovingTilesApp:
 
import java.awt.BorderLayout;
import java.awt.Container;
 
import javax.swing.JButton;
import javax.swing.JFrame;
 
public class MovingTilesApp extends JFrame {
 
	private static final long serialVersionUID = -3054541431624115776L;
 
	//SG_Board myBoard;
	static MyEnhancedBoard myBoard;
 
 
	public Container contentPane;
	public MovingTilesApp() {
		setTitle("Labyrinth");
		setVisible( true ) ;
		setSize(900,800); // Any size, reset it later.
		contentPane = getContentPane();
		contentPane.setLayout(new BorderLayout());
 
		//Note This image is 640x480 pixels
		// public SG_Board (String file_name, int buffer,
		//              int x0, int y0,
		//              int posnsWide, int posnsDown,
		//              int posnPixelsWide, int posnPixelsDown){
 
		//myBoard = new MyEnhancedBoard("Blank.jpg",1,1,1,1,1,1);
 
		myBoard = new MyEnhancedBoard("Blank.jpg",0,0,8,10,64,60);
		//myBoard = new MyEnhancedBoard("Blank.jpg",0,0,10,10,64,60);
 
		//myBoard = new MyEnhancedBoard("Blank.jpg",0,0,10,10,64,60);
 
 
		myBoard.setNoOfTiles(5000); // Total number of tiles
		//setTile(int tileId, int boardCoordX,int boardCoordY,String iconName)
 
 
		PrintMap();
 
		//According to the given NUMBER OF PLAYERS CREATE THE SAME Number OF CLIENTS:
		int id=100;
		for (int i=1; i<= LODServer.clients.size(); i++)
		{
			new Client();
			myBoard.setTile(id++,2,2,"Images/Cool1.jpg"); 
		}
 
		contentPane.add("Center",myBoard);
		//contentPane.add();
		JButton goUpButton = new JButton("Up");
		JButton goDownButton = new JButton("Down");
		JButton goLeftButton = new JButton("Left");
		JButton goRightButton = new JButton("Right");
 
		goUpButton.addActionListener(myBoard);
		goDownButton.addActionListener(myBoard);
		goLeftButton.addActionListener(myBoard);
		goRightButton.addActionListener(myBoard);
		contentPane.add("West",goLeftButton);
		contentPane.add("East",goRightButton);
		contentPane.add("North",goUpButton);
		contentPane.add("South", goDownButton);
 
 
 
 
		myBoard.resize(770,575);
		myBoard.show();
	}
	public static void main(String[] args) {
		//MovingTilesApp myBoardGame = 
		new MovingTilesApp();
	}
 
	static LODServer m = new LODServer();
	public void PrintMap()
	{
		int id = 2;
 
		for(int a=0;a<m.mapHeight;a++)
		{
			for(int b=0;b<m.mapWidth;b++)
			{
				switch(m.map[a][b])
				{					
 
					/*tileId,x,y, ImageFile*/
 
					case LODServer.EMPTY :   myBoard.setTile(id++,a,b,"Images/floor.jpg"); break;
					case LODServer.HEALTH :  myBoard.setTile(id++,a,b,"Images/health.jpg"); break;
					case LODServer.LANTERN : myBoard.setTile(id++,a,b,"Images/lantern.jpg"); break;
					case LODServer.SWORD :   myBoard.setTile(id++,a,b,"Images/sword.jpg"); break;
					case LODServer.ARMOUR :  myBoard.setTile(id++,a,b,"Images/armour.jpg"); break;
					case LODServer.EXIT :    myBoard.setTile(id++,a,b,"Images/exit.jpg"); break;
					case LODServer.WALL :    myBoard.setTile(id++,a,b,"Images/wall.jpg"); break;
					case LODServer.TREASURE : myBoard.setTile(id++,a,b,"Images/gold.jpg"); break;
				}
				if(m.map[a][b] > 0)
				{
					myBoard.setTile(id++,a,b,"Images/gold.jpg"); break;
				}
 
			}
		}
	}
 
 
 
 
}

           
         

	#	Title
	1	Exception in thread "main" java.lan…
	2	Are arguments to python __init__ m…
	3	Exception in thread "main" java.lan…
	4	How do I create a multhreaded app an…
	5	Thread question (C#)
	6	Exception in thread "main" java.lan…