How to create a Java class, similar to a C++ template class?

Question

How do I write an equivalent of this in Java?

// C++ Code  template< class T > class SomeClass { private:   T data;  public:   SomeClass()   {   }   void set(T data_)   {     data = data_;   } }; 

Answer 1

class SomeClass<T> {   private T data;    public SomeClass() {   }    public void set(T data_) {     data = data_;   } } 

You probably also want to make the class itself public, but that's pretty much the literal translation into Java.

There are other differences between C++ templates and Java generics, but none of those are issues for your example.

Answer 2

You use "generics" to do this in Java:

public class SomeClass<T> {   private T data;    public SomeClass() {   }    public void set(T data) {     this.data = data;   } }; 

Wikipedia has a good description of generics in Java.