A strange error in java generic.
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Published on 2011-01-16T03:00:09Z
Indexed on
2011/01/16
3:53 UTC
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Hit count: 132
This is ok:
Class<? extends String> stringClass = "a".getClass();
But this gets error:
<T> void f(T obj) {
Class<? extends T> objClass = obj.getClass();
}
I know I can cast it like:
<T> void f(T obj) {
@SuppressWarnings("unchecked")
Class<? extends T> objClass = (Class<? extends T>) obj.getClass();
}
But why the previous error? Will the next release of Java 7 will support such usage?
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