如何为我的Java项目实现基本数据类型

Question

I normally work for C++. Now coding for Java, I know that Java doesn't have typedef and I have to implement my own object for my basic data type object as

public class FundamentalDataType<T> {
      public T x;
}

So T represents my basic data type and if T is Double, the whole project is using double, if Float the whole project is using Float. But when I make another Class extending FundamentalDataType , I have error if I write as

public class Euclidean_Distance_Function extends FundamentalDataType<T>

if it is line

public class Euclidean_Distance_Function extends FundamentalDataType<Double>

That deviates my idea of making FundamentalDataType class. How can I implement that concept in Java?

Answer 1

If the subclass is going to use the same data type of the superclass, declare it as:

public class Euclidean_Distance_Function<T> extends FundamentalDataType<T> 
{ ... }