JDK-5065215 : javac reports unnecessary unchecked warning
- Type: Bug
- Component: tools
- Sub-Component: javac
- Affected Version: 5.0
- Priority: P4
- Status: Closed
- Resolution: Duplicate
- OS: solaris_8
- CPU: generic
- Submitted: 2004-06-18
- Updated: 2005-12-30
- Resolved: 2005-09-26
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| JDK 6 |
|---|
6Resolved  |
Related Reports
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Duplicate :
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Description
See
http://forum.java.sun.com/thread.jsp?forum=316&thread=530883&tstart=0&trange=50
Because arrays are covariant, there should be no unchecked warning in the
following code. Removing the cast causes the warning to go away.
==========$ cat X.java
class X {
static <T, U extends T> T[] cast(U[] a) { return (T[]) a; }
}
==========$ javac X.java -Xlint
X.java:2: warning: [unchecked] unchecked cast
found : U[]
required: T[]
static <T, U extends T> T[] cast(U[] a) { return (T[]) a; }
^
1 warning
==========$
Comments
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