public class Point { int x; int y; Point() { this(0, 0); } Point(int a) { this(a, a); } Point(int a, int b) { x = a; y = b; } } Constructors are one of the most important constructs in the Java ...

Classes, fields, methods, constructors ... Java lets you declare methods with the same name but with different parameter lists in the same class. This feature is known as method overloading.

Method overloading in Java seems easy to understand and is common in several languages including C/C++ and C#. Method overloading is particularly effective when parameters are optional.