Chapter 2 - Language Fundamentals

Chapter 2 - Language Fundamentals

1. Character sets

   • ASCII
     • Used by Java for most elements, except comments, identifiers, and strings
   • Unicode
     • Not as efficient, uses 4x as much data
     • Allow Java to accept multiple languages in the code

2. Primitives

   • boolean
   • double
   • byte
   • short
   • int
   • float
   • char

3. variables

   • name
   • identifiers
     • must be unique
     • must not be a java keyword

4. constants

   • declared by the keyword final
   • can't be changed after initialization

5. literals

   • source code representation of a value
   • primitive literals
   • null literal
   • string literals