java generics - erasing method

• java parameterized generic type is known (generics). Usually see the most generic applications are in each set, such as ArrayList, HashMap in.
• c ++ using the generic inflation method, is implemented to generate a plurality of classes. And erasing method using a java, the object is stored is erased Object type, but once again according to the corresponding type cast upon removal.

　　Below an example saying ArrayList source erase method:

transient Object [] elementData of;
 // when depositing the E type to store Object 
public  Boolean the Add (E E) { 
        ensureCapacityInternal (size +. 1 ); 
        elementData of [size ++] = E;
         return  to true ; 
    } 
// when removing Object and then into the corresponding E type strong 
 public E GET ( int index) { 
        rangeCheck (index); 

        return elementData of (index); 
    } 

 E elementData of ( int index) {
         return (E) elementData of [index]; 
    }