We can't declare outer (top level) class as static because the static keyword is meant for providing memory and executing logic without creating Objects, a class does not have a value logic directly, so the static keyword is not allowed for outer class.

Can we make top level class as static in Java?

You cannot make a top-level class static in Java, the compiler will not allow it, but you can make a nested class static in Java. A top-level class is a class that is not inside another class.

Can a class be static in Java?

Can a class be static in Java ? The answer is YES, we can have static class in java. In java, we have static instance variables as well as static methods and also static block. Classes can also be made static in Java.