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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) {
  11.         HashSet<String> values = new HashSet<>();
  12.  
  13.         values.add("Ivan");
  14.         values.add("Petr");
  15.         values.add("Alexandr");
  16.         values.add("Dmitriy");
  17.  
  18.         System.out.println(values);
  19.  
  20.         values.add("Petr2");
  21.  
  22.         System.out.println(values);
  23.  
  24.         values.add("Ivan2");
  25.  
  26.         System.out.println(values);
  27.  
  28.     }
  29. }
Success #stdin #stdout 0.04s 2184192KB
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Standard input is empty
stdout
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[Petr, Alexandr, Ivan, Dmitriy]
[Petr, Alexandr, Ivan, Dmitriy, Petr2]
[Ivan2, Petr, Alexandr, Ivan, Dmitriy, Petr2]
https://ideone.com/mCsW3D
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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