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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. Map<String, List<Integer>> map = new HashMap<String, List<Integer>>() {{
  13. put("a", Arrays.asList(0,1,2,3,4));
  14. put("b", Arrays.asList(5,6,7,8,9));
  15. }};
  16.  
  17.  
  18. for (Map.Entry<String, List<Integer>> entry: map.entrySet()) {
  19. System.out.println(entry.getKey() + " " + entry.getValue().toString());
  20. }
  21. }
  22. }
Success #stdin #stdout 0.1s 320512KB
stdin
Standard input is empty
stdout
a [0, 1, 2, 3, 4]
b [5, 6, 7, 8, 9]