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Index › Programming Questions & Help › Syntax Questions › make arrays with a for loop in a class
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make arrays with a for loop in a class (Read 530 times)
clankill3r
make arrays with a for loop in a class
Dec 31st, 2009, 6:15am  
How can i create arrays in a for loop?

Code:
    for(int i=0; i<20; i++){
	int[][] ["test"+i] = new int[20][20];
    }


and if that's possible how can i create them in a class.
Now it says testInt cannot be fined, that's cause it has to be created by this line:
//for loop can't be here

only there can't be a for loop, so does this mean a for loop aint possible or what?


Code:
Grid grid1;

void setup(){
  size(200,200);
    
    grid1 = new Grid();

}

void draw(){
  grid1.test();
}

class Grid {
 
//for loop can't be here
  
  Grid(){//side1, side2
  int[] testInt = new int[10];
    
  }
  
  void test(){
    println(testInt);
  }
}


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Quark
Re: make arrays with a for loop in a class
Reply #1 - Dec 31st, 2009, 7:03am  
Yes it is possible because in Java a "D array is a 1D aray of arrays. Might try this:
Code:


Grid grid;

void setup(){
  size(200,200);
  grid = new Grid(10,25);
  println("Side 1 = "+grid.getSide1());
  println("Side 2 = "+grid.getSide2());
  
}

class Grid {
  
  int[][]g;
  
  Grid(int side1, int side2){
    g = new int[side1][];
    for(int i = 0; i < side1; i++){
	g[i] = new int[side2];
    }
  }
  
  public int getSide1(){
    return g.length;
  }
  
  public int getSide2(){
    return g[0].length;
  }
}

Smiley
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