Java™ How To Program (Early Objects), Tenth Edition

Section 3.4 Account Class: Initializing Objects with Constructors

• Each class you declare can optionally provide a constructor with parameters that can be used to initialize an object of a class when the object is created.

• Java requires a constructor call for every object that’s created.

• Constructors can specify parameters but not return types.

• If a class does not define constructors, the compiler provides a default constructor (p. 83) with no parameters, and the class’s instance variables are initialized to their default values.

• If you declare a constructor for a class, the compiler will not create a default constructor for that class.

• The UML models constructors in the third compartment of a class diagram. To distinguish a constructor ...