Default Constructor

A constructor is called Default Constructor when it doesn't have any parameter. Syntax of default constructor:

$\begin{lstlisting} <class_name>(){} \end{lstlisting}$

In the below example, we are creating the no-arg constructor in the Bike class. It will be invoked at the time of object creation.

$\begin{lstlisting} //Java Program to create and call a default constructor clas... ... //calling a default constructor Bike1 b=new Bike1(); } } \end{lstlisting}$

Output:
$\begin{lstlisting} Bike is created \end{lstlisting}$

**Figure 4.4:** Default constructor

Example of default constructor that displays the default values.

$\begin{lstlisting} //Let us see another example of default constructor //which ... ...ng values of the object s1.display(); s2.display(); } } \end{lstlisting}$

Output

$\begin{lstlisting} 0 null 0 null \end{lstlisting}$

In the above class,you are not creating any constructor so compiler provides you a default constructor. Here 0 and null values are provided by default constructor.