Midterm 1 Study Guide

• Java syntax
  • variable declaration: primitive vs. reference
  • definition and usage: static, final
  • variable and method name convention
  • object instantiation
  • variable initialzation
  • mathematical operations
  • if-else statements, logical operators (&&, ||)
  • iterations (for loops and while loops)
• Class
  • class name
  • class variables
  • instance variables
  • constructors (special methods that return objects)
  • methods
  • visibility modifiers: public, private
• Methods
  • calling static methods
  • calling non-static methods
  • method structure
  • return type
  • parameters
• array/ArrayList
  • how to create an array vs. ArrayList
  • how to access elements in an array vs. ArrayList
  • length vs. size()
  • NullPointerException in Object array and ArrayList
  • how to create and use 2-dimensional array
• Scanner
  • How to instantiate a Scanner object with keyboard input
  • How to instantiate a Scanner object with a file
  • How to read a word/line/number from Scanner object
• Strings
  • equals() vs ==
  • + operator