Classes

  • blueprints for instantiating objects
  • model real world objects in code

Anatomy of a Class

  • Object
    • instance of a class
  • Class
    • defines an abstract type
  • Methods
    • behaviors you can get the object to do
  • Constructors
    • creates the object
    • special method for object instantiation
    • default constructor has no arguments
  • Main method
    • test the class

Accessor Methods

  • Get of methods or getters
    • allows you to get values of variables
    • return a copy
  • Non-void Methods
    • value of specific data type returned
    • no parameteres

Mutator Methods

  • Set of methods or setters
    • allows you to change the value of the variable
  • Void Methods
    • no value returned
    • will take parameters

Writing Classses

  • Method defintion
  • Method Signature
  • Method body

Key Words

  • /Static Modifiers
    • used after access modifiers
    • denotes as belonging to a class
  • /This
    • refers to the constructor that is being called
  • Access Modifiers
    • Restricts scope of classes, variables and functions

Scope and Access

  • /Scope
    • Where a variable can be accessed/used
    • Class level: Instance Var
    • Method level: Local, parameter var
    • Block level: If else/ Loops

2021 1a and 3a 

public int scoreGuess (String guess)
int count = 0;
for (int i = 0; i <= secret.length() - guess.length(); i++){
    if (secret.substring(i, i + guess.length()).equals (guess)){
        count++;
    }
}
return count * guess.length() * guess.length();

public void addMembers(String[] names, int gradYear ){
    
for( String n : names ){
    memberList.add(new MemberInfo( n, gradYear, true) );
}
}