Problem about generics and class array

[Kaiser S.]

Can somebody explains why the last line of code doesn't compile ?

public class TestClassArray {
private static class A {
}
private static class B extends A {
}

Class[] rawClasses = { B.class }; // warning

Class<?>[] wildcardsClasses = { B.class };

// error : Cannot create a generic array of Class<? extends
TestClassArray.A>
Class<? extends A>[] upperBoundClasses = { B.class };
}

 

[Ingo R. Homann]

Hi usual suspect, ;-)

Can somebody explains why the last line of code doesn't compile ?

Class<? extends A>[] upperBoundClasses = { B.class };

Because Generic Arrays are not allowed. (Read the fine error message ;-)

Ciao,
Ingo

 

[Kaiser S.]

Can somebody explains why the last line of code doesn't compile ?

Class<? extends A>[] upperBoundClasses = { B.class };

Because Generic Arrays are not allowed. (Read the fine error message ;-)

Damned! Thx for your help

 

[Ingo R. Homann]

Hi, Mr. Spacey ;-)

Can somebody explains why the last line of code doesn't compile ?

Class<? extends A>[] upperBoundClasses = { B.class };

Because Generic Arrays are not allowed. (Read the fine error message ;-)

Damned! Thx for your help

Note that a

List<Class<? extends A>>

is perfectly OK!

Ciao,
Ingo