Enclose each dimension's initializer within its own set of curly braces.
public class Main{
public static void main(String args[]) {
double m[][] = {
{ 0, 1, 2, 3 },
{ 0, 1, 2, 3 },
{ 0, 1, 2, 3 },
{ 0, 1, 2, 3 }
};
for(int i=0; i<4; i++) {
for(int j=0; j<4; j++){
System.out.print(m[i][j] + " ");
}
System.out.println();
}
}
}
When you run this program, you will get the following output:
0.0 1.0 2.0 3.0
0.0 1.0 2.0 3.0
0.0 1.0 2.0 3.0
0.0 1.0 2.0 3.0