Try this. and see the bold marked text.
int a[][] =
{
{ 3, 4, 2, 9 },
{ 2, 3, 4, 5 },
{ 2, 2, 3, 4 }
};
int b[][] =
{
{ 6, 7, 8, 3 },
{ 4, 2, 1, 3 },
{ 8, 3, 5, 6 }
};
System.out.println("First Matrix A is:-");
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
System.out.print(" " + a[i][j]);
}
System.out.println();
}
System.out.println("First Matrix B is:-");
for (int i = 0; i < b.length; i++) {
for (int j = 0; j < b[i].length; j++) {
System.out.print(" " + b[i][j]);
}
System.out.println();
}