public class p2t2p6{
public static void main(String[] args){
int[][] mat = new int[3][5];
for(int i=0;i<mat.length;i++)
for (int j=0;j<mat[i].length;j++)
mat[i][j] = (i+1)*10 + (j+1);
for(int i= 0;i<mat.length;i++) {
for (int j=0;j<mat[i].length;j++)
System.out.print(mat[i][j]+ " ");
System.out.println();} }}
que produce la salida:
11 12 13 14 15 21 22 23 24 25 31 32 33 34 35