Initialize a two-dimensional array in matrix : Multidimensional Arrays « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. Multidimensional Arrays

public class MainClass {
  public static void main(String args[]) {
    double m[][] = {
      { 0*0, 1*0, 2*0, 3*0 },
      { 0*1, 1*1, 2*1, 3*1 },
      { 0*2, 1*2, 2*2, 3*2 },
      { 0*3, 1*3, 2*3, 3*3 }
    };
    int i, j;
   
    for(i=0; i<4; i++) {
      for(j=0; j<4; j++)
        System.out.print(m[i][j] + " ");
      System.out.println();
    }
  }
}

0.0 0.0 0.0 0.0 
0.0 1.0 2.0 3.0 
0.0 2.0 4.0 6.0 
0.0 3.0 6.0 9.0