Question

When I run this code fragment, neither side is taken.

if (Boolean.class.isAssignableFrom(boolean.class)) {
     uLog.error("Boolean is => boolean");
}
if (boolean.class.isAssignableFrom(Boolean.class)) {
     uLog.error("boolean is <= Boolean");
}

Specifically, I’m trying to test the paramter types using reflection:

Type[] pType = m.getGenericParameterTypes();

and I can’t figure out the proper test for boolean parameters.

Answer 1

The type of built-in boolean is represented by Boolean.TYPE. Since boolean cannot be inherited, you do not need isAssignableFrom: you can simply check the type in question for equality to Boolean.TYPE to see if the type of a parameter is built-in boolean.