java - How do use methods for the elements of a 2d array? -

how use methods elements of 2d array?

i have class board, , initialized 2d array type cell. essentially, want use cell elements, , use methods class. however, unsure how implement that, because error when try

board[1][1].cellmethod() 

code board:

public class board {     private int col = 1, row= 1;     private cell[][] board;     private randomnumbergenerator rand = new randomnumbergenerator();       public board(){         board = new cell[col][row];     //initialize board cells         (int r = 0 ; r<=row; r++){             for(int c = 0; c<= col; c++){                 board[c][r] = new cell(rand.getrandintbetween(1,6), translateoffsettopixel(c,r).getx(), translateoffsettopixel(c,r).gety());             }         }     } 

cell class

public class cell {     //which shape cell consist     private int shape;      //offset of cell located cell number -> need translate given coordinates pixel     private int x, y;      private int shape_width = 50;   //width of each shape (pixels)     private int shape_height = 50;  //height of each shape (pixels)      private rect rect;     private boolean visible;      public cell(int shape, int x, int y){         this.shape = shape;         this.x = x;         this.y = y;         rect = new rect( x, y, x + shape_width, y + shape_height);         visible = false;     }      public int getx() {return x;}     public int gety() {return y;}     public int getshape() {return shape;}    } 

where call board object

public class playstate extends state{     private board board;       @override     public void init() {         board = new board();      }      @override     public void update(float delta) {      }      @override     public void render(painter g) {         for(int r = 0; r<=board.getrow(); r++){             for(int c = 0; c<=board.getcol(); c++){                 board[0][0].  // error, can't implement cell methods             }         }      } 

your board array of size 1 (row , column).

private int col = 1, row= 1; 

so, board has 1 element available @ board[0][0], first row , first column. accessing board[1][1] hence throws arrayindexoutofboundsexception.

remember array index can have maximum value of array.length - 1 only.

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in actual implementation

board = new board(); 

board not array; it's board object. so, can't access indices [][]. need expose underlying board[][] through getter method.

public cell[][] getboard() {     return board; } 

then can use getter in render() method as

@override public void render(painter g) {     cell[][] boardarr = board.getboard();     for(int r = 0; r<=board.getrow(); r++){         for(int c = 0; c<=board.getcol(); c++){             boardarr[r][c].cellmethod();         }     } }