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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.util.stream.* ;
  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. 		String input = "dog🐶" ;
  15. 		List < Integer > codePoints = input.codePoints().boxed().collect( Collectors.toList() ); 
  16. 		String output = 
  17. 		        codePoints
  18. 		                .stream()
  19. 		                .collect( StringBuilder :: new , StringBuilder :: appendCodePoint , StringBuilder :: append )
  20. 		                .toString();
  21.  
  22. 		System.out.println( "input: " + input  ) ;     
  23. 		System.out.println( "codePoints: " + codePoints  ) ;          
  24. 		System.out.println( "output: " + output  ) ;
  25.  
  26. 		String result = Ideone.listOfCodePointsToString( codePoints ) ;
  27. 		System.out.println( "result: " + result ) ;
  28. 	}
  29.  
  30. 	public static final String listOfCodePointsToString( List< Integer > codePoints )
  31. 	{
  32. 		String output = 
  33. 		        codePoints
  34. 		                .stream()
  35. 		                .filter( codePoint -> Character.isValidCodePoint​( codePoint ) )
  36. 		                .collect( StringBuilder :: new , StringBuilder :: appendCodePoint , StringBuilder :: append )
  37. 		                .toString();
  38. 	    return output ;
  39. 	}
  40. }
Success #stdin #stdout 0.11s 55252KB
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Standard input is empty
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input: dog🐶
codePoints: [100, 111, 103, 128054]
output: dog🐶
result: dog🐶
https://ideone.com/rNtYoT
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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