Calling constructor of same class from a constructor

[Java Tip]

A constructor of a class can be called from another constructor of the same class. The constructor calling statement (this()) should be the first statement in the constructor. Review the code below.

Code:

public class ClassA {

	public ClassA(){
		this(2);
		System.out.println("Constructor without parameter.");
	}
	
        public ClassA(int a){
		System.out.println("Constructor with int parameter: " + a);
	}

        public static void main(String[] str)
       {
       ClassA obj = new ClassA();
       }
}

Output:

Code:

Constructor with int parameter: 2
Constructor without parameter.