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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. List< String > names = List.of(
  13. "Alice", "Bobby", "Bobette" , "Carol"
  14. );
  15.  
  16. long countBobs =
  17. names
  18. .stream()
  19. .filter(
  20. ( String name ) -> name.contains( "Bob" )
  21. )
  22. .count()
  23. ;
  24.  
  25. System.out.println( "countBobs: " + countBobs ) ;
  26. }
  27. }
Success #stdin #stdout 0.11s 34680KB
stdin
Standard input is empty
stdout
countBobs: 2