Java中的一维数组

Question

When I run this code on cmd prompt with statement :

java Test A

output is

a
b
c

Wasn't it suppose to result in an error since dimension of args is 1 whereas dimension of x is 3 (args=x).

class Test
{
   public static void main(String args[])
   {
      String[] x={"a","b","c"};

      args=x;
      for(String i: x)
      {
       System.out.println(i);
      }
   }
}

Answer 1

好吧，java中的数组变量只是一个引用，所以如果你给它另一个字符串数组的引用，它会接受它，所以数组变量（args）接受的值范围是对内存中字符串数组的引用，它是就像将整数的值从 1 更改为 3 一样，这没问题，因为它们都是有效的，并且在整数接受的范围内。

Answer 2

It will not result in an error because your object is not final and you are not changing the array object.

here

double[] data = new double[5]{2, 4, 5, 6, 8} // data can change but the instance of the class cant change
double[] data = new double[7] // here you are changing the data but not the object i.e the created instance of the object does not change but the instance the data(the variable) is holding changes

I hope you got your answer