21. The method finalize automatically executes when the class object goes out of scope. 22. A mutator method of a class changes the values of the data members of the class. 23. In Java, the reference this is used to refer to only the methods, not the instance variables of a class.

21. The method finalize automatically executes when the class object goes out of scope. 22. A mutator method of a class changes the values of the data members of the class. 23. In Java, the reference this is used to refer to only the methods, not the instance variables of a class.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

### Java Programming Concepts

#### 21. Finalize Method
The method `finalize` automatically executes when the class object goes out of scope.

#### 22. Mutator Method
A mutator method of a class changes the values of the data members of the class.

#### 23. The `this` Reference in Java
In Java, the reference `this` is used to refer to only the methods, not the instance variables of a class.

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