//类型       数组名[] = new 数组类型  [个数]
        int $arr[] = new int [4];
        $arr[0] = 1;
        $arr[1] = 2;
        $arr[2] = 3;
        $arr[3] = 4;
    
        //类型    数组名称  = new 数组类型[]{}
        int $arr1[] = new int[]{1,2,3,4,5};
        
    
        //类型 [] 数组名称 = {};
        int[] $arr2 = {1,2,3,4,5};
    
        for (int i : $arr2) {
            System.err.println(i);
        }