how to create a generic constructor for a generic class in java?

Question

I want to create a KeyValue class but in generic manner and this is what I've written:

public class KeyValue<T,E>  {      private T key;     private E value;     /**      * @return the key      */     public T getKey() {         return key;     }     /**      * @param key the key to set      */     public void setKey(T key) {         this.key = key;     }     /**      * @return the value      */     public E getValue() {         return value;     }     /**      * @param value the value to set      */     public void setValue(E value) {         this.value = value;     }      public KeyValue <T, E>(T k , E v) // I get compile error here     {         setKey(k);         setValue(v);     } } 

the error says : "Syntax error on token ">", Identifier expected after this token"

how should I create a generic constructor in java then?

Answer 1

Write constructor exactly the same way you wrote other methods

public KeyValue(T k , E v)      {         setKey(k);         setValue(v);     } 

Answer 2

You need to remove <T, E> from the constructor's signature: it's already there implicitly.

public KeyValue(T k , E v) // No compile errors here :) {     setKey(k);     setValue(v); }