Arrays类学习

 Arrays类学习

package array;

import java.util.Arrays;

public class ArrayDemo {
    public static void main(String[] args) {
        int[] a = {51,3,7,10,1,30,53,6,89};
        System.out.println(a);//[I@1b6d3586   Hashcode
        //打印数组元素
        System.out.println(Arrays.toString(a));//[51, 3, 7, 10, 1, 30, 53, 6, 89]
        //数组进行排序
        Arrays.sort(a);
        System.out.println(Arrays.toString(a));//[1, 3, 6, 7, 10, 30, 51, 53, 89]
        //数组填充
        Arrays.fill(a,10);
        System.out.println(Arrays.toString(a));//[10, 10, 10, 10, 10, 10, 10, 10, 10]
        Arrays.fill(a,2,5,1);
        System.out.println(Arrays.toString(a));//[10, 10, 1, 1, 1, 10, 10, 10, 10]
    }
}