java arrays类学习

import java.util.Arrays;
public class main 
{
    public static void main(String[] args)
    {
        int []arr=new int[10];
        Arrays.fill(arr, 5);
        System.out.println(Arrays.toString(arr));
        
        int [] nums = {6,1,5,9,3,5,7,2,3,9};
        Arrays.sort(nums);
        System.out.println(Arrays.toString(nums));
        
        int [] nums1 = {6,1,5,9,3,5,7,2,3,9};
        int [] nums2 = {6,2,5,9,3,5,7,2,3,9};
        int [] nums3 = {6,1,5,9,3,5,7,2,3,9};
        System.out.println(Arrays.equals(nums1, nums2));
        System.out.println(Arrays.equals(nums1, nums3));
        
        int xb=Arrays.binarySearch(nums, 5);
        System.out.println(xb);
    }
}