this() constructor to invoke current class constructor

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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
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Explanation