Convert java.lang.reflect.Type to Class clazz

Question

How can I convert java.lang.reflect.Type to Class clazz?

If I have one method as next which has an argument of Class

Answer 1

Using generic types in runtime is a little bit tricky in Java. And I think this is a root cause of your issue.

1) to be sure about generic in runtime we doing like this:

class MyClass {}

and then:

MyClass genericAwaredMyClassInctance = new MyClass(){};

please pay attention to {} in the end. It means anonymous extends of MyClass. This is an important nuance.

2) let`s improve MyClass to be able to extract the type in runtime.

class MyClass {

    @SuppressWarnings("unchecked")
    protected Class getGenericClass() throws ClassNotFoundException {
        Type mySuperclass = getClass().getGenericSuperclass();
        Type tType = ((ParameterizedType)mySuperclass).getActualTypeArguments()[0];
        String className = tType.getTypeName();

        return (Class) Class.forName(className);
    }

}

and finally, use it like this:

MyClass genericAwaredMyClassInctance = new MyClass(){};

assert(genericAwaredMyClassInctance.getGenericClass() == TargetType.class)