数组静态初始化只能在定义时赋值，否则编译错误

数组静态初始化注意事项

public static void main(String[] args) {
        int[] arr = {1,2,3,4,5};
        //arr = {1,23,3,4,5};编译错误
        arr = new int[3];//编译正确
        System.out.println(arr);
        for(int i:arr){
            System.out.println(i);
        }
}