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Chapter 2 - Coggle Diagram

- - - - initialize as string
- - - - hold -128 to 127
    - - signed
        
        negative and positive numbers
      - 16 bit length
      - short reptile = 65535;
        
        does not compile high number
    - - unsigned
        
        only positive numbers
      - 16 bit length
      - char fish = (short) -1;
        
        does not compile negative number
    - - java reserve 32 bits
  - - - doesnt compile
      - dont fit in int
    - - compile
      - said this is a long number
    - - octal
        
        017
      - hexa
        
        0x or 0X
        
        0xFfF
      - binário
        
        0b10 or 0B10
  - - - compile
    - - doesnt compile
  - - - can be null
    - - cannot be null
      - dont have methods
  - - - int s1, s2 =0;
      - int s1; int s3;
      - String c1, c2, c3;
    - - double d1, double d2;
      - double d1; d2;
  - - - inside method
        
        must to initialize
        
        without initialize, compiler error
  - - - member field
        
        unique value each object
    - - static field
        
        value shared for all
    - - table 2.3
        
        char '\u0000'
- - - - operator new create an object
      - instance of class
- - - - two local variable
      - method parameter
      - inside method
      - only access in method
    - - if(teste){int inteiro=1}
        
        only access inside if
      - block of code
        
        own scope
- - - - suggest jvm to call gc
      - its not guaranteed
      - jvm can ignore