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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.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. public static void main (String[] args) throws java.lang.Exception
  12. {
  13. Random rnd = new Random();
  14.  
  15. final int numToGenerate = 20;
  16.  
  17. final int[] counts = new int[10]; // holds 0...9
  18.  
  19. for (int i = 0; i < numToGenerate; ++i) {
  20. int num = rnd.nextInt(10); // between 0 and 9
  21. counts[num]++;
  22. }
  23.  
  24. for (int i = 0; i < counts.length; ++i) {
  25. String times = (counts[i] == 1 ? "time" : "times");
  26. System.out.printf(" %d occurs %d %s%n", i, counts[i], times);
  27. }
  28. }
  29. }
Success #stdin #stdout 0.05s 2184192KB
stdin
Standard input is empty
stdout
 0 occurs 3 times
 1 occurs 1 time
 2 occurs 3 times
 3 occurs 0 times
 4 occurs 1 time
 5 occurs 3 times
 6 occurs 2 times
 7 occurs 1 time
 8 occurs 3 times
 9 occurs 3 times