Data Structures and Algorithms in Java Chapter 1: Overview
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Created by:
LaToyaNicole on July 7, 2012
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Created form my notes on Data Structures and Algorithms Second Edition by Robert Lafore
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21 terms
Terms | Definitions |
|---|---|
 What is a data structure? | An arrangement of data inside a computers memory or a disk. |
| Name 5 data types | BLASH: binary trees, linked lists, arrays, stacks, hash tables |
| What do algorithms do? | Manipulate the data in data structures in various ways such as sorting. |
| What is real-world storage data? | Data structure storage that describes physical entities external to the computer. Accessed by a programs user. |
| What are programmer's tools? | Data structure storage that is accessed by the program itself. Ex - stacks and queues. |
| What is real-world modeling? | Data structures that directly model real-world situations...think graphs. |
| What is an object? | A software bundle of variables and related methods. |
| What is a class? | A blueprint that defines an objects variables and methods. |
| The keyword "new" is used to do what? | Create a new object in Java. |
| An object is often referred to as: | An instance of a class. |
| object.method(); is and example of | Invoking a method for a specific object. |
| Execution of the program starts where? | main() |
| To create an object in Java you must do two things: | 1. Use the keyword "new" 2. Store a reference to the object in a variable that is the same type as the class. So: Object = new ClassReference(); |
| How do other parts of your program interact with objects? | By interacting with an objects methods |
| What is a constructor? | A special method that is called automatically whenever a new object is created. It prepares the object for use. |
| How is the constructor named? | It has the same name as the class it resides in. |
| A field of method that is private can only be accessed by | Methods that are apart of the same class. |
| Any outside entity that wants to access data in a class can do so by: | Using a method of that class. |
| What must be added to all input methods for them to work? | throws IOException |
| What does the charAt() method do? | Returns a character at the specific position in the string object. |
| What does the parse.Int() method do? | Converts the string type into an integer. |
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