Hi Friend,

Consider the following example,

abstract class A {
abstract void hi();
void hello() {
System.out.println("This is a hello() method.");
}
}
class B extends A {
void hi() {
System.out.println("This is a hi() method");
}
}
class MyAbstractClass {
public static void main(String args[]) {
B b = new B();
b.hi();
b.hello();
}
}

This program is saved with the name 'MyAbstractClass' and compile and run with the same name.

javac MyAbstractClass.java
java MyAbstract

Thanks