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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.util.concurrent.ThreadLocalRandom;
  5.  
  6. /* Name of the class has to be "Main" only if the class is public. */
  7. class Ideone {
  8. 	public static void main(String[] args) {
  9.  
  10.         Ranges r = new Ranges()
  11.             .add(233, 333)
  12.             .add(377, 477)
  13.             .add(610, 710);
  14.         System.out.println(r.random());
  15.  
  16. 	}
  17. }
  18.  
  19. class Ranges {
  20.     private List<Range> ranges = new ArrayList<>();
  21.  
  22.     Ranges add(long min, long max) {
  23.         this.ranges.add(new Range(min, max));
  24.         return this;
  25.     }
  26.  
  27.     long random() {
  28.         int index = ThreadLocalRandom.current().nextInt(ranges.size());
  29.         return this.ranges.get(index).random();
  30.     }
  31. }
  32.  
  33. class Range {
  34.  
  35.     private long lower;
  36.     private long upper;
  37.  
  38.     Range(long lower, long upper) {
  39.         this.lower = lower;
  40.         this.upper = upper;
  41.     }
  42.  
  43.     long random() {
  44.         return ThreadLocalRandom.current().nextLong(this.lower, this.upper);
  45.     }
  46. }
Success #stdin #stdout 0.04s 2184192KB
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https://ideone.com/txQWDX
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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