OnJava8-Examples/arrays/Reverse.java

// arrays/Reverse.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// The Collections.reverseOrder() Comparator
import java.util.*;
import onjava.*;

public class Reverse {
  public static void main(String[] args) {
    CompType[] a = Generated.array(
      new CompType[12], CompType.generator());
    System.out.println("before sorting:");
    System.out.println(Arrays.toString(a));
    Arrays.sort(a, Collections.reverseOrder());
    System.out.println("after sorting:");
    System.out.println(Arrays.toString(a));
  }
}
/* Output:
before sorting:
[[i = 58, j = 55], [i = 93, j = 61], [i = 61, j = 29]
, [i = 68, j = 0], [i = 22, j = 7], [i = 88, j = 28]
, [i = 51, j = 89], [i = 9, j = 78], [i = 98, j = 61]
, [i = 20, j = 58], [i = 16, j = 40], [i = 11, j = 22]
]
after sorting:
[[i = 98, j = 61], [i = 93, j = 61], [i = 88, j = 28]
, [i = 68, j = 0], [i = 61, j = 29], [i = 58, j = 55]
, [i = 51, j = 89], [i = 22, j = 7], [i = 20, j = 58]
, [i = 16, j = 40], [i = 11, j = 22], [i = 9, j = 78]
]
*/