how can we Create instance for generic type in java

Question

Is it possible to create an instance of a generic type in Java? I think it is not possible still want to know if it is possible

class BetaContainer<E>
{
    E createContents()
    {
        return what???
    }
}

Answer 1

You can with a classloader and the class name, eventually with some parameters shown in the code below

final ClassLoader classL = ...
final Class<?> aClass = classL.loadClass("java.lang.Integer");
final Constructor<?> constr= aClass.getConstructor(int.class);
final Object obj = constr.newInstance(123);
System.out.println("o = " + obj);

Hope it helps!

If you need to know more about Java, join our Java online course today.

Thanks

Answer 2

private static class SomeContainer<E> {
    E createContents(Class<E> clazz) {
        return clazz.newInstance();
    }
}