JAVA LANGUAGE

JAVA LANGUAGE

1. Characters & Writing

   • ASCII
     • Regular (7 bits) & Extended (8 bits)
     • Western European languages friendly
   • Unicode
     • Unique characters that represent most languages in the world
     • 32 bits

2. Separators

   • Parentheses
     • 1. Method way to contain list of arguments
     • 2. exp. to raise operator precedence
     • 3. Narrows conversations
     • 4. Loops to contain expressions
   • Colon
     • For statements/iterations over arrays or collections
   • Brackets
     • 1. Array declaration
     • 2. Array value dereferencing
   • Angle Brackets
     • Parameter to parameterized types
   • Braces
     • 1. Declaration of type
     • 2. Block of statements
     • 3. Array initialization
   • Semicolon
     • Terminates statements
   • Comma
     • Separates arguments in methods
   • Period
     • Separates packages from sub-packs and types
       • Also fields or methods from reference variables

3. Mainly Object-Oriented Programming

4. Primitives

   • TYPES
     • Byte
       • 8 bits
       • A number from -128 to 127
     • Short
       • 16 bits
       • A number from -34768 to 32767
     • int
       • 32 bits and most common number
     • float
       • Simple-precision decimal point (32 bit)
     • double
       • double precision of decimal (64 bit)
     • boolean
       • true or false
     • char
       • a letter or symbol
   • Non-object simple values

5. Variables

   • Types
     • Reference types
     • Primitive types
   • Identifier / Name
     • Any length sequence of letters that should not be a keyword
   • Data placeholder for values that can change

6. LITERALS

   • Integer
     • Syntax
       • g
   • Floating-Point
     • Syntax
       • g
   • Boolean
     • Syntax
       • g
   • Character
     • Syntax
       • g

7. Constants

   • Data placeholder where the value cannot change once assigned

8. KEYWORDS

   • abstract assert boolean break byte case catch char class const continue default do double else enum extends final finally float for if goto implements import instanceof int interface long native new package private protected public return short static strictfp super switch synchronized this throw throws transient try void volatile while