get the type of String object - java

Question

I'm trying to find the hierarchy of the Object - "String" using the below method.

public class test{

    public static void main(String[] args){
        String x = "Test";
        System.out.println(x.getClass().getClass());
    }
}

The first x.getclass() return

Output:

    class java.lang.String

then -System.out.println(x.getClass().getClass());

Output:
       class java.lang.Class

and anything after that yields the same result

System.out.println(x.getClass().getClass().getClass().getClass());

Shouldn't it at some point lead to - java.lang.Object??

Pshemo · Accepted Answer · 2013-10-09 15:00:04Z

4

Result is correct since you are calling getClass() on Class instance. To get parent class you should call getSuperclass() from Class instance that represents subclass type.

String x = "Test";
System.out.println(x.getClass().getSuperclass());

Output

class java.lang.Object

edited Oct 9, 2013 at 15:00

answered Oct 9, 2013 at 14:53

Pshemo

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Comments

Joachim Sauer · Accepted Answer · 2013-10-09 14:54:05Z

1

x.getClass().getClass() will always return the class object representing java.lang.Class for any non-null value x.

That's because x.getClass() can only return a Class object and you're asking that class object what type it is (obviously: Class).

What you seem to want to try is not x.getClass().getClass() but x.getClass().getSuperClass(). Repeating that last part will eventually lead to java.lang.Object, as you expected (and, if repeated one more time, to null).

answered Oct 9, 2013 at 14:54

Joachim Sauer

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