In Java, how do I dynamically determine the type of an array?

Question

Object o = new Long[0] System.out.println( o.getClass().isArray() ) System.out.println( o.getClass().getName() ) Class ofArray = ??? 

Running the first 3 lines emits;

true [Ljava.lang.Long; 

How do I get ??? to be type long? I could parse the string and do a Class.forname(), but thats grotty. What's the easy way?

Answer 1

Just write

Class ofArray = o.getClass().getComponentType(); 

From the JavaDoc:

public Class<?> getComponentType()

Returns the Class representing the component type of an array. If this class does not represent an array class this method returns null.