Thu, Oct 8	The test will include extra points (Mistakes Happen!), e.g., 52 or 53 points, but graded on a scale of 50.
Types of questions	factual knowledge: TRUE/FALSE, multiple choice TRUE or FALSE: In Java, an attempt to compare two String values using == will result in an error. conceptual understanding: short answer, discussion Object-oriented design is a popular approach in the development of large software systems. What is the basic idea behind object-oriented design? That is, when faced with a problem to be solved, what aspects of the problem does object-oriented design focus on first? synthesis and application: explain/debug code, trace/modify code Given the definition of the Coin class, write a code segment that creates and initializes a Coin object named quarter and repeatedly flips it (and prints the flip) until two heads in a row are obtained.
Study advice	review online lecture notes review the text book (if not mentioned in class, won't be on test) look over quizzes, homework assignments reference other sources for examples, different perspectives practice solving problems on codingbat.com
Course material	Object-oriented design goals abstraction: ignore details to focus attention on higher level of problem object-focused: identify the objects in the real-world system & model each with a class modularization: design each class/method to be well-defined & self-contained, so that they can be built/examined separately & reused easily Java classes using classes loading a BlueJ project, creating an object, inspecting an object's state calling a method, parameters, return values defining/examining classes fields: maintain the state of an object access using this. prefix can be static (shared by class) and/or final (unchangeable) constructor(s): initialize the fields for a newly created object methods: implement the behaviors of the method accessor method returns a field value; mutator method changes field(s) can define local variables for temporary values must specify return type (void if no return) class/constructor/methods are (usually) public; fields are (usually) private comments (/** ... */ or // ..) are for documentation Java statements assignment statements data types (String, int, double, char, boolean) variables, expressions (+, -, *, *, %) arithmetic assignments: +=, -=, *=, /=, ++, -- primitive types vs. object types (using new) variable scope (field = entire class; parameter/local = that method only) output statements System.out.print, System.out.println return statements conditional statements 1-way: if; 2-way: if-else; multi-way: cascading if-else comparison operators: ==, !=, <, >, <=, >= (danger: = vs. ==) logical connectives: && (AND), || (OR), ! (NOT) repetition statements while: conditional repetition for: counter-driven repetition (shorthand version of while loop) for-each: for traversing a list (shorthand version of for loop) method calls internal call: this.METHOD(PARAMETERS) external call: OBJECT.METHOD(PARAMETERS) Java library classes String implicit call to new when assigning, immutable methods: length, charAt, contains, indexOf, substring, toUpperCase, toLowerCase, equals, compareTo, ... Character static methods: toUpperCase, toLowerCase, isLetter, isUpperCase, isLowerCase, ... Integer static method: parseInt Random methods: nextInt, nextDouble, ... ArrayList generic, must specify the type of object stored wrapper classes (Integer, Double, ...) allow for storing primitives methods: add, get, size, remove, contains, set, indexOf, toString, ... traversal using for loop vs. for-each loop Input/Output Scanner class used to read from keyboard (System.in) or a file (File object) methods: hasNext, next, hasNextLine, nextLine, hasNextInt, nextInt, close, ... FileWriter class used to write to a file methods: write, close