Non-virtual Methods in Java - java tutorials

Non Virtual Methods in Java

Lets see the concept of virtual methods, a virtual function is function whose behavior can not be overridden by inheriting the class.

In C++ programming you can make a function virtual , that tell the compiler that you want to use the most derived methods in object hierarchy.

In Java programming language all the methods are virtual, i.e. the most derived method is always called. Consider an example -

public class A {
	public void m() {
		System.out.println("Class A's method m() Called");
	}
}

public class B extends A{
	public void m(){
		System.out.println("Class B's method m() Called");
	}
}

public class C {
	public static void main(String[] args) {
		A a = new A();
		a.m();
		A a1 = new B();
		a1.m();
		B b = new B();
		b.m();
	}
}

When you will run the above code you will see the output as

The better way to achieve the non-virtual function in java is that make all the non-virtual method static. Consider the example given below -

public class A {
	public static void m() {
		System.out.println("Class A Called");
	}
}

public class B extends A{
	public static void m(){
		System.out.println("Class B Called");
	}
}

public class C {
	public static void main(String[] args) {
		A a = new A();
		a.m();
		A a1 = new B();
		a1.m();
		B b = new B();
		b.m();
	}
}