Generics

[sireesha]

Hi,
I am placing some code here...

Code:

public class GenericBox1
{
   public <U> void inspect(U u)
   {
       System.out.println(u.getClass().getName());
   }        
   public static void main(String[] args)
   {
     GenericBox1 ob=new GenericBox1();
     System.out.println("Passing Integer object");
     ob.inspect(new Integer(10));
     System.out.println("Passing Double object");
     ob.inspect(10.34); //..............see this line                            
     System.out.println("Passing String object");
     ob.inspect("affaffaf");
     Integer intobject=new Integer(24);
     System.out.println("Passing Integer object");
     ob.inspect(intobject);
   }
    }

In my code i am passing a primitive type 10.34 instead of a object.
But i read that we can't pass primitive types as a formal type parameter in generics use.
But here i did it.
but it didn't show any error.it works well.
what is the reason for this ?
is this the example for auto boxing and unboxing ?

[roots]

Yes this is an example of Autoboxing and unboxing ..

Quote:

can't pass primitive types as a formal type parameter in generics use

Code:

public class Box<E> {
	private E e;

	public E getE() {
		return e;
	}

	public void setE(E e) {
		this.e = e;
	}

	public static void main(String[] args) throws Exception {
		Box<Integer> ok = new Box<Integer>();		
		Box<int> no-ok = new Box<int>(); // This doesnot work
	}
}

[sireesha]

thanks for your reply
now i understood it.