- Arrays：針對數(shù)組進(jìn)行操作的工具類，比如說排序和查找
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public static String toString (int[] a):把數(shù)組轉(zhuǎn)成字符串
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public static void sort(int[] a):對數(shù)組進(jìn)行排序
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public static int binarySearch(int[] a,int key)二分查找
package com.manman.cn;
import java.util.Arrays;
public class ArraysDemo {
public static void main(String[] args) {
int[] arr={2,3,5,6,8,7,1};
//public static String toString (int[] a)把數(shù)組轉(zhuǎn)成字符串
System.out.println("排序前："+Arrays.toString(arr));
//public static void sort(int[] a):對數(shù)組進(jìn)行排序
Arrays.sort(arr);
System.out.println("排序后："+Arrays.toString(arr));
//public static int binarySearch(int[] a,int key)二分查找
System.out.println("二分查找："+Arrays.binarySearch(arr, 2));
}
}
