Arrays数组工具类

介绍

代码

package lesson.l8_arrays;

import java.util.Arrays;

/**
 * Illustration
 *
 * @author DengQing
 * @version 1.0
 * @datetime 2022/6/23 16:53
 * @function Arrays数组工具类
 */
public class ArraysUtil {
    public static void main(String[] args) {
        int[] arr1 = new int[]{1, 12, -3, -4, 10, 11, 7123844, -1, 2};
        int[] arr2 = new int[]{1, 12, -3, -4, 10, 11, 7123844, -1, 2};
//        1.判读两个数组是否相等
        System.out.println(Arrays.equals(arr1, arr2));
//        2.输出数组信息
        System.out.println(Arrays.toString(arr1));
//        3.全部替换fill
        Arrays.fill(arr1, -10);
        System.out.println(Arrays.toString(arr1));
//        4.从小到大排序
        Arrays.sort(arr2);
        System.out.println(Arrays.toString(arr2));
//        5.二分查找
        int index = Arrays.binarySearch(arr2, -3);
        System.out.println(index > 0 ? index : "没有找到");
    }
}

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