数组常用方法，常见异常

import java.util.Arrays;

public class ArraysText {
    public static void main(String[] args) {
//        1. boolean equals(int[] a,int[] b)
        int[] arr1 = new int[]{1,3,2,4};
        int[] arr2 = new int[]{1,3,5,2};
        System.out.println(Arrays.equals(arr1,arr2));

//        2.String toString(int[] a);
        System.out.println(Arrays.toString(arr1));

//        3.void fill(int[] a,int val)
        Arrays.fill(arr1,10);
        System.out.println(Arrays.toString(arr1));

//        4.sort
        Arrays.sort(arr2);
        System.out.println(Arrays.toString(arr2));

//        5.binarySearch返回值为负数表示未找到
        int[] arr3 = new int[]{-98,-34,2,34,54,66,79,105,210,333};
        int index = Arrays.binarySearch(arr3,210);
        System.out.println(index);
        /*
            数组常见异常
            1.数组角标越界：java.lang.ArrayIndexOutOfBoundsException
            2.空指针异常：NullPointerException
         */
    }
}