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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. import java.util.*;
  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. 		byte[] a = {1, 0, 1};
  14. 		byte[] b = {1, 0, 1};
  15. 		if(a == b)
  16. 			System.out.println("a == b");
  17. 		if(a.equals(b))
  18. 			System.out.println("a equals b");
  19. 		if(Arrays.equals(a,b))
  20. 			System.out.println("a Arrays.equals b");
  21. 		Map<byte[], String> map = new HashMap<byte[], String>();
  22. 		map.put(a, "a");
  23. 		if(map.containsKey(a))
  24. 			System.out.println("map cointains key a");
  25. 		if(map.containsKey(b))
  26. 			System.out.println("map cointains key b");
  27. 		System.out.println(map.get(a));
  28. 		System.out.println(map.get(b));
  29. 		map.put(b, "b");	
  30. 		if(map.containsKey(a))
  31. 			System.out.println("map cointains key a");
  32. 		if(map.containsKey(b))
  33. 			System.out.println("map cointains key b");
  34. 		System.out.println(map.get(a));
  35. 		System.out.println(map.get(b));
  36. 	}
  37. }
Success #stdin #stdout 0.06s 380224KB
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stdin
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Standard input is empty
stdout
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a Arrays.equals b
map cointains key a
a
null
map cointains key a
map cointains key b
a
b
https://ideone.com/hnfmbT
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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