Collections creating inner classes

[Nila dhan]

I am using Collections for sorting. The Collections creates innerclasses say Class$1.

I havent noticed this behaviour previously. Is this expected?

Thanks in Advance

[Henry Wong]

There are lots of inner classes related to collections... but you shouldn't be getting any extra ones just because you compiled code that uses them. If you are getting new inner classes in your code, it should be noticeable in your code. It shouldn't be too hard to check.

Henry

[Rob Spoor]

$1 and beyond indicate anonymous inner classes (look it up if you don't know what that means). It essentially uses an incremental number for each anonymous inner class encountered in the source code.

[Naman Patidar]

Inline method overriding might be used somewhere in the code.
following code demonstrate it :

public class InnerClassTest implements Comparable {
@Override
public int compareTo(Object o) {
return 0;
}

public static void main(String[] args) {
InnerClassTest i1 = new InnerClassTest(){
@Override
public int compareTo(Object o) {
return 1;
}
};
InnerClassTest i2 = new InnerClassTest();
System.out.println(i1.compareTo(i2));
System.out.println(i2.compareTo(i1));
}
}

[Rob Spoor]

Naman Patidar wrote:Inline method overriding

That's called "creating an anonymous inner class".