this() constructor to invoke current class constructor

Java Programming Language Class, Object and Methods in java (Article) Class, Object and Methods in java (Program)

3831

---

Program:

class ThisClass{

	ThisClass(){
		System.out.println("this is default constructor");
		}

	ThisClass(int x){
	//Calling default constructor from parameterized constructor:
	this();
	System.out.println(x);
 }
}

class MainClass{
	public static void main(String args[]){
	ThisClass a=new ThisClass(14);
	}
}

/* The this() constructor call can be used to invoke the current
class constructor. It is used to reuse the constructor. In other
words, it is used for constructor chaining.
*/

Output:

this is default constructor
14
Press any key to continue . . .

Explanation:

---

---