数组的常用方法

import java.util.ArrayList;
import java.util.Arrays;

public class array_Methods {
    public static void main(String[] args){
        Integer[] arr1 = {3,4,1,5,7,8,9,2,6};
        //数组转换为列表存储
        //泛型只能是引用类型，所以ArrayList不支持int类型
        ArrayList<Integer> arrList = new ArrayList<Integer>(Arrays.asList(arr1));
        System.out.println(arrList);

        //数组转字符串
        System.out.println(Arrays.toString(arr1));

        //数组排序
        Arrays.sort(arr1);
        System.out.println(Arrays.toString(arr1));

        //数组填充
        Arrays.fill(arr1,8,9,0);
        System.out.println(Arrays.toString(arr1));

        //数组拷贝
        Integer[] arr2 = Arrays.copyOf(arr1,9);
        System.out.println(Arrays.toString(arr2));

    }
}