3.2 Classes, Objects, Methods and Instance Variables
1
3.2 Classes, Objects, Methods and Instance Variables
? Class provides one or more methods ? Method represents task in a program
? Describes the mechanisms that actually perform its tasks
? Hides from its user the complex tasks that it performs
? Method call tells method to perform its task
? 2005 Pearson Education, Inc. All rights reserved.
2
3.2 Classes, Objects, Methods and Instance Variables (Cont.)
? Classes contain one or more attributes
? Specified by instance variables ? Carried with the object as it is used
? 2005 Pearson Education, Inc. All rights reserved.
3
3.3 Declaring a Class with a Method and Instantiating an Object of a Class
? Each class declaration that begins with keyword public must be stored in a file that has the same name as the class and ends with the .java filename extension.
? 2005 Pearson Education, Inc. All rights reserved.
4
Class GradeBook
? keyword public is an access modifier ? Class declarations include:
? Access modifier ? Keyword class ? Pair of left and right braces
? 2005 Pearson Education, Inc. All rights reserved.
5
Class GradeBook
? Method declarations
? Keyword public indicates method is available to public
? Keyword void indicates no return type ? Access modifier, return type, name of method and
parentheses comprise method header
? 2005 Pearson Education, Inc. All rights reserved.
................
................
In order to avoid copyright disputes, this page is only a partial summary.
To fulfill the demand for quickly locating and searching documents.
It is intelligent file search solution for home and business.
Related download
- object reference not set to an instance of an object list
- object reference not
- metaclass class instance university of toronto
- unhandled exception object reference not set
- object oriented programming with java tutorial
- python classes and objects
- object reference not set to an instance of an object meaning
- 3 2 classes objects methods and instance variables
- object instance annotation with deep extreme level set
Related searches
- java classes objects and methods
- 1 or 3 2 0 5 374 374 168 1 1 default username and password
- 1 or 3 2 0 5 711 711 168 1 1 default username and password
- 1 or 3 2 0 5 693 693 168 1 1 default username and password
- 1 or 3 2 0 5 593 593 or 2dvchrbu 168 1 1 default username and password
- 1 or 3 2 0 5 910 910 168 1 1 default username and password
- 1 or 3 2 0 5 364 364 168 1 1 admin username and password
- 192 1 or 3 2 0 5 33 33 1 1 default username and password
- 1 or 3 2 0 5 633 633 168 1 1 admin username and password
- 192 1 or 3 2 0 5 735 735 1 1 default username and password
- 1 or 3 2 0 5 948 948 168 1 1 admin username and password
- 192 1 or 3 2 0 5 372 372 1 1 default username and password