java - Creating a new instance for class with a boolean array -

i'm writing code changes colour of array cell either black or white depending on original colour is. if cell white, changes black , vice versa. i'm working below code:

public class grid {      boolean[][] grid;     private int height;     private int width;     public white;     public black;       public grid(int height, int width) {          height = height;         width = width;      }      public int getheight() {          return height;     }      public int getwidth() {          return width;     }      public boolean iswhite(int i, int j) {         boolean [][] grid = new boolean [height][width];         ( = 0; i<height ; i++);{             (j = 0; j<width ; j++){                 if (grid[i][j] ?? //iswhite) {                     ??//setblack                 }                 else (??)//setwhite              }         }      }}      protected void setwhite(int i, int j) {         ??     }      protected void setblack(int i, int j) {         ??     } } 

i believe i'm supposed create instance grid[i][j] depending on boolean value i'm not sure how relate 'public boolean iswhite' 'setwhite' , 'setblack'. how should go it?

you have defined boolean grid[][] class variable. you'll need set in constructor along lines of grid = new boolean[height][width]; recommend initializing values, sanity's sake. (i.e. set them true or false or predefined pattern.) once you've done that, can check grid[i][j] value, either true or false. (whichever of wish represent black , white.)

for instance, iswhite function simple (assuming white == true)

public boolean iswhite(int i, int j) {         return grid[i][j]; } 

similarly, set functions relatively minimal:

void setwhite(int i, int j) {     grid[i][j] = true; }  void setblack(int i, int j) {     grid[i][j] = false; } 

additional: want create code appropriate thing when flipping colors rather placing inside iswhite function. (it should testing color, not changing values, right?)

void changecoloratyx(int y, int x){     if(iswhite(y, x)){         setblack(y, x);     } else {         setwhite(y,x);     } }