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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. int[][] a1 = new int[2][3];
  13. System.out.println(Arrays.deepToString(a1));
  14.  
  15. int[][] a2 = { {1,2}, {3,4}, {5,6} };
  16. System.out.println(Arrays.deepToString(a2));
  17.  
  18. int[][] a3 = { {1}, {2,3}, null };
  19. System.out.println(Arrays.deepToString(a3));
  20. }
  21. }
Success #stdin #stdout 0.1s 320512KB
stdin
Standard input is empty
stdout
[[0, 0, 0], [0, 0, 0]]
[[1, 2], [3, 4], [5, 6]]
[[1], [2, 3], null]