How do I get a class instance of generic type T?

To get a class instance of a generic type T, you can use the new operator and specify the type argument when creating an instance of the class. Here's an example:

class MyClass<T>
{
    T field;

    public MyClass(T t)
    {
        field = t;
    }
}

// Creating an instance of MyClass<Integer>
MyClass<Integer> instance = new MyClass<Integer>(5);

// Creating an instance of MyClass<String>
MyClass<String> instance2 = new MyClass<String>("hello");

Alternatively, you can use Java reflection to create an instance of the class at runtime:

MyClass<Integer> instance = MyClass.class.getDeclaredConstructor(Integer.class).newInstance(5);
MyClass<String> instance2 = MyClass.class.getDeclaredConstructor(String.class).newInstance("hello");

Keep in mind that due to Java's type erasure, generic type information is not available at runtime. If you need to work with generic types dynamically, you must pass the Class<T> object explicitly to your method or use a library like Guava's TypeToken.

If the class has multiple type parameters, you will need to specify values for all of them when creating an instance of the class.