code: import java.util.Arrays;
  import java.util.Collections;
  import java.util.List;
  import java.util.AbstractList;
  
  public class Disjoint {
      public static <T extends Comparable<? super T>> void sortDisjoint(
              final List<T> array, final int[] idxs) {
          Arrays.sort(idxs);
          Collections.sort(new AbstractList<T>() {
  		public int size() { return idxs.length; }
  		public T get(int i) { return array.get(idxs[i]); }
  		public T set(int i, T x) { return array.set(idxs[i], x); }
  	    });
      }
  
      public static void main(String[] args) {
          List<Integer> list = Arrays.asList(7, 6, 5, 4, 3, 2, 1, 0);
          int[] indices = {6, 1, 7};
          System.out.println(list);
          sortDisjoint(list, indices);
          System.out.println(list);
      }
  }
  