java 数组排序的简单方法

在对java 的数组排序时，不用循环数组去做比较，JDK 有一个内置的方法去实现：Arrays.sort(),下面用例子说明，应该很好理解，例子包括了对字符串，整数数组的排序

import java.util.Arrays;
import java.util.Collections;
 
public class ArraySorting{
 
	public static void main(String args[]){
 
		String[] unsortStringArray = new String[] {"c", "b", "a", "3", "2", "1"}; 
		int[] unsortIntArray = new int[] {7,5,4,6,1,2,3}; 
 
		System.out.println("Before sort");
		System.out.println("--- unsortStringArray ---");
		for(String temp: unsortStringArray){
			System.out.println(temp);
		}
		System.out.println("--- unsortIntArray ---");
		for(int temp: unsortIntArray){
			System.out.println(temp);
		}
 
		//sort it
		Arrays.sort(unsortStringArray);
		Arrays.sort(unsortIntArray);
 
		System.out.println("After sorted");
		System.out.println("--- unsortStringArray ---");
		for(String temp: unsortStringArray){
			System.out.println(temp);
		}
		System.out.println("--- unsortIntArray ---");
		for(int temp: unsortIntArray){
			System.out.println(temp);
		}
 
		//sort it, reverse order
		Arrays.sort(unsortStringArray,Collections.reverseOrder());
 
		System.out.println("After sorted - reserved order");
		System.out.println("--- unsortStringArray ---");
		for(String temp: unsortStringArray){
			System.out.println(temp);
		} 
	} 
}

Before sort
--- unsortStringArray ---
c
b
a
3
2
1
--- unsortIntArray ---
7
5
4
6
1
2
3
After sorted
--- unsortStringArray ---
1
2
3
a
b
c
--- unsortIntArray ---
1
2
3
4
5
6
7
After sorted - reserved order
--- unsortStringArray ---
c
b
a
3
2
1