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Java
Java Programming Language
| Term | Definition |
|---|---|
| java programming language | class based, object oriented, and compiles to bytecode and runs on JVM |
| conditional statements | if, else if, nested, switch |
| if statement | boolean followed by statements |
| if else statement | if statement followed by else statement if boolean false |
| if else if statement | tests various conditions |
| nested if statement | if or else if statement inside another if or else if statement |
| switch statement | value checked if it equals a list of values called cases |
| loop definition | execute block of code multiple times |
| types of loops | while, for, do while, enhanced for |
| while loop | executes block of code until boolean is true |
| for loop | executes code a set number of times |
| do while loop | executes code until boolean false |
| enhanced for loop | traverse collection elements like arrays |
| enhanced for loop declaration | new variable used in code block |
| enhanced for loop expression | array or collection being traversed |
| interface | collection of methods that a class implements, all methods are public abstract, variables are public static final |
| difference between interface and class | cannot be instantiated, no constructors, abstract methods, no instance fields, extend multiple interfaces |
| abstract class | abstract and non abstract methods and is extended and implemented but can't be instantiated |
| exception | object is subclass of throwable that wraps an error and contains info about error, state of program and custom info |
| exception types | checked, unchecked |
| checked expression | handled explicitly, expression throws exception or handles it otherwise program crashes, tested by compiler |
| unchecked expression | not handled explicitly, doesn't throw exception, not tested by compiler |
| errors | subclass of throwable where most conditions prevent the program from being recovered |
| catching exceptions | use try catch finally block |
| keyword throws | doesn't handle exception and throws another exception |
| keyword throw | either catches or creates a new exception |
| keyword finally | always executes code even if there is an exception |
| array | contains elements of same type with fixed number of elements randomly accessed |
| queue | ordered list of objects that uses fifo or first in first out |
| list | expandable array with indexed contents and is built on an array with added functions |
| linked list | expandable like a list but is node based |
| array list | dynamic array that shrinks and grows, randomly accessed and implements list interface |
| set interface | no duplicate elements and has methods from collections class |
| map interface | uses key value pairing |
| static keyword | makes variables and methods globally available to all classes, uses other static members, and uses dot notation |
| final keyword | makes element immutable, methods can't be overridden, and classes can't be extended |
| constructor | special method used to set initial value attributes and is called when object of class created |
| abstract keyword | makes method or class a template, has no body, extended but can't be instantiated |
| stack | like a list but enforces lifo or last in first out |
| graph | node based that tracks child nodes and are bidirectional |
| binary search tree | sorted tree where left child <= N < right child and is balanced when number of nodes on either side is almost equal |
Created by:
SuzaK
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