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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.function.Consumer;
  7. import java.util.stream.Collectors;
  8. import java.util.stream.IntStream;
  9.  
  10. /* Name of the class has to be "Main" only if the class is public. */
  11. class Ideone
  12. {
  13. 	public static void main (String[] args) throws java.lang.Exception
  14. 	{
  15. 		// 繰り返し処理に使うList
  16.         List<Integer> list = IntStream.rangeClosed(1, 10).boxed().collect(Collectors.toList());
  17.         myForEach(list,s -> System.out.print(s));
  18.         System.out.println();
  19.  
  20.         MyList<Integer> myList = new MyList<>(list);
  21.         myList.myForEach(s -> System.out.print(s));
  22. 	}
  23.  
  24. 	 private static <T> void myForEach(List<T> list, Consumer<T> consumer) {
  25.         for (T t : list) {
  26.             consumer.accept(t);
  27.         }
  28.     }
  29. }
  30.  
  31. class MyList<T> {
  32.     List<T> list;
  33.  
  34.     public MyList(List<T> list) {
  35.         this.list = list;
  36.     }
  37.  
  38.     public void myForEach(Consumer<T> consumer){
  39.         for (T t : list) {
  40.             consumer.accept(t);
  41.         }
  42.     }
  43. }
Success #stdin #stdout 0.19s 2841600KB
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12345678910
12345678910
https://ideone.com/Y5Yo6e
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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