Question

For the primitive types: int, double, short, etc…

Given:

String typeName = "double";

How do I get double.class?

For a regular class we can do the following:

String typeName = "java.lang.Integer"
Class<?> clazz = Class.forName(typeName);  
// Class.forName(typeName) returns Double.class

Answer 1

You can’t do that. Check out the reflection documentation. Go to the “Class.forName()” section and there, you can find a note:

This cannot be used for primitive types.

One option might be to create a method that will recognize the primitive types and return the matching class (i.e. Integer.class, Double.class, etc…)