Learn Pain Less

Default constructor in java

Default constructor doesn’t have parameters. And default constructor exists in class if we doesn’t create constructor inside class. If we create any constructor having 1,2,3 parameters then there is no default constructor anymore. We need to create default constructor manually in this case.

Example of default constructor:

class Android {
    public static void main(String[] a){
        Android a = new Android(); //default constructor in java
    }
}

In the following example i haven’t created any constructor inside class Android, but inside main method i created an instance of Android class using constructor without any parameters. This is default constructor. And that is the use off default constructor.