Comparable接口实现数组排序

Comparable接口可以实现对象数组排序，也就可以对整型数组进行直接排序：

import java.util.*;class Node implements Comparable<Node> {private int value;public Node(int value) {this.value = value;}@Overridepublic int compareTo(Node node) {  if (this.value == node.value) {              return 0;          } else {              return this.value > node.value ? 1 : -1;           }  }public static void sortInt(int[] a) {Node[] node = new Node[a.length];for(int i = 0; i < a.length; i ++) {node[i]=new Node(a[i]);}Arrays.sort(node);for(int i = 0; i < a.length; i ++) {a[i] = node[i].value;}}public static void main(String[] args) {int[] a = {1, 4, 5, 7, 6, 5, 9, 12, 34, 23};sortInt(a);for(int i = 0; i < a.length; i ++) {System.out.print(a[i] + " ");}}}

输出结果：1 4 5 5 6 7 9 12 23 34