Question

Here is a variable Class<?> cls, now I want to get another Array Class Object which component type is cls.

For example, if cls=String.class , I want to get String[].class; if cls=int.class, I want to get int[].class, what should I do?

You see, It’s quite easy to get String.class from String[].class:

Class<?> arrayCls = String[].class;
if(arrayCls.isArray()){
    Class<?> cls = arrayCls.getComponentType();
}

But I cannot find easy way to do the reverse.

Here is one possible solution:

Class<?> clazz = String.class;
Class<?> arrayClass = Array.newInstance(clazz,0).getClass();

Is there any batter way to do this please?

Answer 1

Maybe try Class.forName(String)?

Edit: Here is a code snippet.

Class<?> arrayClass = String[].class;
System.out.println(arrayClass);
Class<?> namedClass = Class.forName("[L" + String.class.getName() + ";");
System.out.println(namedClass);
System.out.println(arrayClass == namedClass);