Java Program using an abstract class with a constructor

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In this program, You will learn how to implement an abstract class with the constructor in java.

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abstract class First { 
  First () { 
        //statement
  } 
}

Example: How to implement an abstract class with the constructor in java.

abstract class First {
    First() {
        System.out.println("Default constructor is called here");
    }
    abstract void msg();
}

class Main extends First {

    void msg() {
        System.out.println("msg is called here");
    }

    public static void main(String args[]) {
        Main t = new Main();
        t.msg();
    }
}

Output:

Default constructor is called here
msg is called here