Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
A constructor signature refers to the unique combination of a class's name and its parameter types. It helps create instances (objects) of that class with specific initial values.
A default constructor is automatically created by Java if no constructor is explicitly defined in a class. It has no parameters and initializes the object with default values.
A parameterized constructor is a constructor that accepts one or more parameters, allowing you to initialize an object with specific values during its creation.
Instance variables are variables declared within a class but outside of any method. They hold data that is unique to each instance (object) of the class.