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Abstract Method

The method that does not has method body is known as abstract method. In other words, without an implementation is known as abstract method. It always declares in the abstract class. It means the class itself must be abstract if it has abstract method. To create an abstract method, we use the keyword abstract.

Syntax
\begin{lstlisting} abstract void method_name(); \end{lstlisting}

Example of abstract method


\begin{lstlisting} //abstract class abstract class Demo { //abstract method d... ...yClass(); //invoking abstract method obj.display(); } } \end{lstlisting}

Output:


\begin{lstlisting} Abstract method... \end{lstlisting}