java的Arrays类

package ARRAY;
import java.util.*;
public class array {
	public static void main(String args[]){
		int a[]={12,49,16,14,18,45,21};
		Arrays.sort(a);   //数组排序
		int point = Arrays.binarySearch(a,12);  //在数组a中找到12位置
		Arrays.fill(a,11);  //用11填充数组a
		System.out.println(Arrays.toString(a));  //以字符串输出数组
	}
}