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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. 		String a1 = "blablabla";
  13. 		String b1 = a1;
  14.  
  15. 		System.out.println(b1);
  16. 		System.out.println(a1);		
  17.  
  18. 		System.out.println(b1.hashCode());
  19. 		System.out.println(a1.hashCode());
  20.  
  21. 		a1 = "wow";
  22.  
  23. 		System.out.println(b1.hashCode());
  24. 		System.out.println(a1.hashCode());
  25.  
  26. 		System.out.println(b1);
  27. 		System.out.println(a1);		
  28.  
  29. 		Set<String> a = new HashSet<String>();
  30.  
  31. 		Set<String> b = a;
  32.  
  33. 		a.add("hey");
  34. 		a.add("HellO");
  35.  
  36. 		System.out.println(b.size());
  37. 		System.out.println(b.hashCode()); // This is important
  38. 		System.out.println(a.hashCode()); // This is important too!!!
  39.  
  40. 		a.clear();
  41.  
  42. 		System.out.println(a.size());  // same hashcode i.e. gets affected by the change.
  43. 		System.out.println(b.size());
  44. 	}
  45. }
Success #stdin #stdout 0.1s 320256KB
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stdin
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Standard input is empty
stdout
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blablabla
blablabla
1304972471
1304972471
1304972471
117919
blablabla
wow
2
69712814
69712814
0
0
https://ideone.com/pZWzNl
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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