Someone

import java.util.Random;public class Gol{    protected boolean alive;	protected boolean dead;		private static int xDim;	private static int yDim;	private static Cell[][] grid;	private static Cell[][] tempGrid;		public int type;		public Gol(int xDim, int yDim)    {        this.xDim = xDim;        this.yDim = yDim;                              initMatrix();    }        public void setLife(int k)	{		//if(grid.length != this.yDim)		//throw new IllegalArgumentException("Das Array abstraktesSpielfeld muß exakt dieselben Abmessungen haben wie das Spielfeld.");		for(int i = 0; i < xDim; i++)		{			//if(grid[i].length != this.xDim)			//throw new IllegalArgumentException("Das Array abstraktesSpielfeld muß exakt dieselben Abmessungen haben wie das Spielfeld.");						for(int j = 0; j < yDim; j++)			{				type = generateLife();												if(type >= 0 && type < k )				{					grid[i][j].setAlive(false);				}				else				{					grid[i][j].setAlive(true);				}			}		}	}		private int generateLife()	{		Random rn = new Random();		int number = rn.nextInt(10);		return number;			}			private void initMatrix()    {        this.grid = new Cell[yDim][xDim];                for(int i = 0; i < yDim; i++)        {            for(int j = 0; j < xDim; j++)            {                            	this.grid[i][j] = new Cell(j, i);                            }        }    }        public void playLifecycles(int n)    {       	System.out.println("StartGrid:");       	printMatrix();               	for(int i = 0; i < n; i++)        {            System.out.println("Generation " + (i + 1) + ":");            nextGeneration();            printMatrix();        }    }        	private boolean checkRighttolive(int r, int c) 	{                int neighbourCount = 0;				int tmp_i = 0;				int tmp_k = 0;                //int cC = 0;                //System.out.println("Row: " + r + ", Col " + c);				for(int i = -1; i <= 1; i++) {					                        for(int k = -1; k <= 1; k++) {								if(r+i > this.xDim) tmp_i = 0;                                else if(r+i < 0) tmp_i = this.xDim-1;                                else tmp_i = r+i;                                                               if(c+k > this.xDim-1) tmp_k = 0;                               else if(c+k < 0) tmp_k = this.xDim-1;                                else tmp_k = c+k;                                                               if(tmp_i == r && tmp_k == c) {                                        //System.out.println("Checking myself (" + r + "," + c +")");                                        continue;                                }                                                               //System.out.println(cC++ + ": Checking (" + tmp_i + ", " + tmp_k + ")");                                if(this.grid[tmp_i][tmp_k].isAlive() == true) neighbourCount++;                                                               if(neighbourCount > 3) return false;                        }                }                //System.out.println("Neighbours: " + neighbourCount);                              //System.out.println("Row " + r);                //System.out.println("Col " + c);                //System.out.println("hmmm" + this.world[r][c]);                               if(this.grid[r][c].isAlive() == true) {                        if(neighbourCount == 2 || neighbourCount == 3) {                                this.livingCells++;                                return true;                        }                }                else {                        if(neighbourCount == 3) {                                this.livingCells++;                                return true;                        }                }                               return false;        }            /* public static boolean isAlive(int xPos, int yPos)    {    	System.out.println("xpos:"+xPos+" "+yPos);    	System.out.println("xdim:"+xDim+" "+yDim);    	    	if(xPos < 0 && yPos < 0 && grid[xDim-1][yDim-1].alive == true)    	{    		return true;    	}    	else if( xPos >= xDim && yPos >= yDim && grid[0][0].alive == true)    	{    		return true;    	}    	else if(xPos < 0 && grid[xDim-1][yPos].alive == true)    	{    		return true;    	}    	else if(xPos >= xDim && grid[0][yPos].alive == true)    	{    		return true;    	}    	else if(yPos < 0 && grid[xPos][yDim-1].alive == true)    	{    		return true;    	}    	else if(yPos >= yDim && grid[xPos][0].alive == true)    	{    		return true;    	}    	else    	{    		return false;    	}	    	    }*/        public void nextGeneration()    {    	this.tempGrid = new Cell[yDim][xDim];    	        for(int i = 0; i < this.yDim; i++)        {            for(int j = 0; j < this.xDim; j++)            {                this.tempGrid[i][j] = this.grid[i][j];                }        }              	    	// Nächste Runde berechnen        for(int i = 0; i < this.yDim; i++)        {            for(int j = 0; j < this.xDim; j++)            {                if(this.tempGrid[i][j].nextValue() == true)                   this.grid[i][j].setAlive(true);                else                   this.grid[i][j].setAlive(false);            }        }                        }			public void printMatrix()    {        System.out.println();        for(int i = 0; i < this.yDim; i++)        {            for(int j = 0; j < this.xDim; j++)            {                System.out.print(grid[i][j]);            }            System.out.println();        }        System.out.println();    }	        }