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.