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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. import java.time.* ;
  8.  
  9. /* Name of the class has to be "Main" only if the class is public. */
  10. class Ideone
  11. {
  12. 	public static void main (String[] args) throws java.lang.Exception
  13. 	{
  14.  
  15. 	    Set< String > names = new TreeSet<> () ;
  16. 	    names.add( "Carol" ) ;
  17. 	    names.add( "Alice" ) ;
  18. 	    names.add( "Bob" ) ;
  19. 	    System.out.println( "names.toString(): " + names ) ;
  20.  
  21.  
  22. 	    Set< DayOfWeek > weekend = EnumSet.of( DayOfWeek.SUNDAY , DayOfWeek.SATURDAY ) ;
  23. 	    System.out.println("weekend.toString(): " + weekend ) ;
  24.  
  25.         Set< String > colors = new LinkedHashSet<> () ;
  26.         String peachPuff = "PeachPuff" ;
  27.         colors.add( "CornflowerBlue" ) ;
  28.         colors.add( peachPuff ) ;
  29.         colors.add( "DarkSlateGray" ) ;
  30.         colors.add( peachPuff ) ; // Adding repeatedly. Original insertion order maintained.
  31.         System.out.println( "colors.toString(): " + colors ) ;
  32.  
  33. 	}
  34. }
Success #stdin #stdout 0.15s 36872KB
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stdout
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names.toString(): [Alice, Bob, Carol]
weekend.toString(): [SATURDAY, SUNDAY]
colors.toString(): [CornflowerBlue, PeachPuff, DarkSlateGray]
https://ideone.com/RfVBNj
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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