Name: rmT116609 Date: 02/23/2004


FULL PRODUCT VERSION :
java version "1.5.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b32c)
Java HotSpot(TM) Client VM (build 1.5.0-beta-b32c, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows 2000 [Version 5.00.2195]

A DESCRIPTION OF THE PROBLEM :
java.io.File implements java.lang.Comparable but not the genericized Comparable<File>, so that I cannot call Collections.sort() on a List<File>:

cannot find symbol
symbol : method sort(java.util.List<java.io.File>)
location: class java.util.Collections
        Collections.sort(files);
                   ^

It works fine if I cast the argument to a raw List! But that still causes an unchecked warning:

warning: [unchecked] unchecked method invocation: <T>sort(java.util.List<T>) in java.util.Collections is applied to (java.util.List)
        Collections.sort((List) files);
                   ^


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.*;
import java.util.*;

public class SortFileList
{
    public void sortFileList()
    {
        List<File> files = new ArrayList<File>();
        Collections.sort(files);
    }
}


---------- END SOURCE ----------
(Incident Review ID: 239913)
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