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  1. import java.util.*;
  2. import java.util.function.*;
  3. import java.time.*;
  4. class Ideone {
  5.     private static <X, Y> List<Y> mapi(BiFunction<Integer, X, Y> f, List<X> xs) {
  6.         List<Y> ys = new ArrayList<>();
  7.         for (int i = 0; i < xs.size(); i++)
  8.             ys.add(f.apply(Integer.valueOf(i), xs.get(i)));
  9.         return ys;
  10.     }
  11.     private static <X> List<X> sort(Comparator<X> c, List<X> xs) {
  12.         List<X> ys = new ArrayList<>(xs);
  13.         ys.sort(c);
  14.         return ys;
  15.     }
  16.     private static <X, Y> List<Y> map(Function<X, Y> f, List<X> xs) {
  17.         List<Y> ys = new ArrayList<>();
  18.         for (X x : xs) ys.add(f.apply(x));
  19.         return ys;
  20.     }
  21.     private static <E extends Comparable<E>> List<Integer> sorti(List<E> cs) {
  22.         /*
  23.         record IndexedValue<T extends Comparable<? super T>>(Integer index, T value) implements Comparable<IndexedValue<T>> {
  24.             public int compareTo(IndexedValue<T> other) {
  25.                 return value.compareTo(other.value);
  26.             }
  27.         }
  28.         */
  29.         class IndexedValue<T extends Comparable<? super T>> implements Comparable<IndexedValue<T>> {
  30.         	private Integer index;
  31.         	private T value;
  32.         	public Integer index() {return index;}
  33.         	public IndexedValue(Integer index, T value) {this.index = index;this.value = value;}
  34.             public int compareTo(IndexedValue<T> other) {return value.compareTo(other.value);}
  35.         }
  36.         return map(IndexedValue<E>::index, sort(IndexedValue<E>::compareTo, mapi(IndexedValue<E>::new, cs)));
  37.     }
  38.     private static <E extends Comparable<E>> List<Integer> f(List<E> cs) {
  39.         return sorti(sorti(cs));
  40.     }
  41.     private static <E extends Comparable<E>> void g(List<E> cs) {
  42.         System.out.println(f(cs));
  43.     }
  44.     public static void main(String[] args) {
  45.         g(Arrays.asList(1,100,10,10000,1000));
  46.         g(Arrays.asList(3,1,4,1,5,9,2));
  47.         g(Arrays.asList(0,1,0,1,0,1,0,1));
  48.         g(Arrays.asList("A","C","B","E","D"));
  49.         g(Arrays.asList(Month.MARCH, Month.JANUARY, Month.APRIL, Month.JANUARY, Month.MAY, Month.SEPTEMBER, Month.FEBRUARY));
  50.     }
  51. }
  52.  
Success #stdin #stdout 0.09s 55756KB
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stdin
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Standard input is empty
stdout
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[0, 2, 1, 4, 3]
[3, 0, 4, 1, 5, 6, 2]
[0, 4, 1, 5, 2, 6, 3, 7]
[0, 2, 1, 4, 3]
[3, 0, 4, 1, 5, 6, 2]
https://ideone.com/Z8Q9Dk
language:
Java (HotSpot 12)
created:
52 days ago
visibility:
secret

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