Question

Im trying to use the type of one variable to define the type on another
I know i could just put all the types in an enum then use ordinal with a switch/case to select but i’m wondering if theres an easier way.

Heres a small example:

public void loadRotation(TetrominoType type) {
TetrominoType new = new type.class();
}

TetroiminoType type = new RedTetro();
this.loadRotation(type);

RedTetro obviously extends TetrminoType

I know this won’t work but hopefully from it you understand what i’m trying to do.

Answer 1

Reflection is the answer.

If you’re talking about a class that has a zero argument constructor, it’s quite straight forward:

MyClass c = new MyClass();
MyClass c2 = c.getClass().newInstance();

If you need to use a constructor that takes arguments you have to extract the Constructor you need and use that. Oracle provides a tutorial here:

http://download.oracle.com/javase/tutorial/reflect/member/ctorInstance.html