二维数组排序实例：

import java.util.*;public class TwoDimArrayTest {public static void main(String[] args) {String[][] arr = {
  {"B","Z","K"},{"C","X","L"},{"A","Y","M"}} ;//缺省(按0列升序)Arrays.sort(arr, new TwoDimArrayComparator());printArray(arr);//按0列降序Arrays.sort(arr, new TwoDimArrayComparator(0,-1));printArray(arr);//按1列升序Arrays.sort(arr, new TwoDimArrayComparator(1));printArray(arr);//按1列降序Arrays.sort(arr, new TwoDimArrayComparator(1,-1));printArray(arr);//按2列升序Arrays.sort(arr, new TwoDimArrayComparator(2));printArray(arr);//按2列降序Arrays.sort(arr, new TwoDimArrayComparator(2,-1));printArray(arr);}public static void printArray(String[][] arr) {for (int i= 0; i< arr.length ; i++) {for (int j = 0; j < arr[i].length; j++) {System.out.print(arr[i][j] +"\t");}System.out.println();}System.out.println("======================");}}

class TwoDimArrayComparator implements Comparator{private int keyColumn = 0;private int sortOrder = 1;public TwoDimArrayComparator () {}public TwoDimArrayComparator (int keyColumn) {this.keyColumn = keyColumn;}public TwoDimArrayComparator (int keyColumn,int sortOrder) {this.keyColumn = keyColumn;this.sortOrder = sortOrder;}public int compare(Object a, Object b) {if (a instanceof String[]) {return sortOrder * ((String[])a)[keyColumn].compareTo(((String[])b)[keyColumn]);} else if (a instanceof int[]){return sortOrder * (((int[])a)[keyColumn] - ((int[])b)[keyColumn]);} else {return 0;}}}

运行结果：

C:\java>java TwoDimArrayTest

A Y M B Z K C X L ====================== C X L B Z K A Y M ====================== C X L A Y M B Z K ====================== B Z K A Y M C X L ====================== B Z K C X L A Y M ====================== A Y M C X L B Z K ======================

本文转自kenty博客园博客，原文链接http://www.cnblogs.com/kentyshang/archive/2007/07/04/805334.html如需转载请自行联系原作者

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