Problem in using Method overloading in a class ?

[Vinod Vinu]

hi, iam implementing the concept of method overloading in java class but not able to succeed b'coz it is keep on saying that
'sendPrListToScreen' is undefined for the type 'service class name'.
But as per my knowledge it is defined.

{
List scrPrDraftList = [b]sendPrListToScreen(prDraftList);[/b]
---
---
}

 public List sendPrListToScreen(List<PrDraftHeader> prDraftList) 
	{
	------
---------	
   }

 public List sendPrListToScreen(List<PurchaseRequestHeader> prList) 
	{
------
---
}

But when i use two different names of this method declared above then it works perfectly but iam not able to use the cream of Core Java.

any suggestions?
thank you

[Gregg Bolinger]

What you're describing and what you've shown aren't adding up, for me. The problem is your use of Generics. As far as the compiler is concerned during this sweep, the 2 methods are the same. You should be getting an error about duplicate method names. Something along the lines of:

name clash: sendPrListToScreen(List<PrDraftHeader> prDraftList) and sendPrListToScreen(List<PurchaseRequestHeader> prList) have the same erasure

Also, an administrative note. Please use real words. Because instead of b'coz. We have a lot of users who's first language isn't English. By using words like b'coz it just makes it more difficult to communicate.

[Vinod Vinu]

The problem is your use of Generics. As far as the compiler is concerned during this sweep, the 2 methods are the same. You should be getting an error about duplicate method names.

i want to know that why the Generic lists cannot be used in Method Overloading in java ?
Is there an alternate solutions for it so that my purpose can resolved using method overloading ?

thank you once again

[Jesper de Jong]

Vinod Vijay wrote:i want to know that why the Generic lists cannot be used in Method Overloading in java ?

That's because of the way generics are implemented in Java - with type erasure

[Rob Spoor]

Type erasure removes all generics when a class is compiled. What remains is this:

public List sendPrListToScreen(List prDraftList)    
{   
    ...
}   
  
public List sendPrListToScreen(List prList)  
{   
    ...
}   

They are very much the same.

[Vinod Vinu]

thank you so much Jesper Young and Rob Prime for your support

[Rob Spoor]

You're welcome.