public class Student
{

    public String name;
    public int age;

    public Student()
    {
        System.out.println("Default constructor is invoked ...");
    }

    public Student(String name, int age)
    {
        /*
         * The this() constructor call can be used to invoke the current class
         * constructor (constructor chaining). This approach is better if you
         * have many constructors in the class and want to reuse that
         * constructor.
         *
         *  Call to this() must be the first statement in constructor.
         */
        this();
        this.name = name;
        this.age = age;
    }

}