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Java 5, Collections warning in Eclipse

colin shuker
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Joined: Apr 11, 2005
Posts: 744
Hi, I'm using Java 5.0, with Eclipse.
I have this code below, which gives a warning as stated below:



The word comp gets underlined in yellow in eclipse, as shown above in italics, and it says:

Type safety: The expression of type Comp needs unchecked conversion to conform to Comparator<? super SetObj>


Can anyone explain what this means and how I can fix it without just supressing the warning.

Thanks
[ April 19, 2007: Message edited by: colin shuker ]
Keith Lynn
Ranch Hand

Joined: Feb 07, 2005
Posts: 2367
The reason is that you are trying to create a TreeSet with a type by using a Comparator that has a raw type.

To get rid of the warning, instead of implementing the raw interface Comparator, you can implement the interface Comparator<SetObj>.
 
It is sorta covered in the JavaRanch Style Guide.
 
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