When to use abstract class and interface in Java

Abstract methods can't be declared as private.

It's not necessary to have abstract method in abstract class
public abstract class Test40 {
public static void main(String[] args) {
System.out.println("test......");
}

}

thnks

Abstract class may or may not have any abstract methods

An abstract class may not have any abstract method.

better if explained in an editor by writing and executing, instead of reading content in a blog

In interface all member variabled are public static final bydefault rt?

I think it better to explain more in your own words instead of studying that because fresher students want more in depth

Man to good explanation.. thanks thanks thanks

Abstract method can't be declared as final. Bcz Once we declares final it can't be changed ,but abstract method must be overrided.

But in case java 8 how to differentiate means when will use interface and abstract class