Java

Java

1. ASCII & Unicode

   • Character Sets
   • ASCII
     • 128 7 bit characters
   • Unicode
     • As much as a million 32 Bit characters
       • Character Encoding
         • UTF - 8,16,32
         • Compresses characters
   • Extended ASCII
     • 256 8 bit characters

2. Separators

   • Parentheses ()
     • Operator Precedence
     • Method signatures
     • Narrowing conversions
     • Loops
   • Brackets []
     • Array Declaration
   • Braces {}
     • Declaration types
     • Coding blocks
     • Array initialization
   • Angles Brackets <>
     • Pass parameters to parameterized types
   • Semicolon ;
     • terminate statements
     • In "for" statements to separate initialization and expression
   • Colon :
     • In "for" statements for an array
   • Comma ,
     • Separate arguments in declaration
   • Period .
     • Separate package names, methods, & variables

3. Data Types

   • Primitive types
     • Numerical
       • Whole Number Integers
         • byte
         • short
         • long
         • int
       • Fractional Numbers
         • double
         • float
     • Unicode
       • Char
     • Logic
       • boolean
   • Reference Types
     • Refers to an object

4. Variables

   • Identifier (Name)
     • naming convention: lowerUpper
       • Capitalization matters

5. Constants

   • Variables with values that cannot be changed
   • final byte Name

6. Literals

   • primitive type literals
     • Integer literals
       • Assign integer value to variable
         • 10
     • Character literals
       • Character enclosed in single quotes
         • 'A'
     • Boolean literals
       • True
       • False
     • Floating type literals
       • Float
         • 3.14f
       • Double
         • 2e1
   • string literals
   • null literal

7. Binary

   • 0000 000 = 0
   • 0000 0001 = 1
   • 0000 0010 = 2
   • 0000 0011 = 3
   • 1111 1101 = -3
     • Reverse bits and add 1