为什么这段代码不会引发classcast异常？

Question

Object o=new int[]{1,2,3}; 
int[] array=(int[]) o; 
for(int a:array){
  //print the values
}

-Why dont i get a classcast exception here while iterating through the array given that array extends Object class?

Answer 1

Because in java even arrays are Objects . . If you print array instanceof Object , it returns true.

Next, you are creating an array and using an Objects reference. Since the final instance is an array , you will not get any exception.

Answer 2

Object is the Super Class for all the Classes in Java. Every Class Extends Object Implcitly. So, instances of any class can be cast into Object type.

Answer 3

Because o itself is array of int[] -array type. If it would be, for example, o = new long[] {...} - in this case, yes, it will throw an exception.