Please enable JavaScript.

Coggle requires JavaScript to display documents.

Java語法基礎 (型態、變數、運算子 (運算子 (位元 (& | ~ ^, >> <<), 遞增、遞減…

- - - - 又稱參考型態
        Reference Type
    - - 位元組
        byte
        
        -128~127
      - 浮點數
        
        float
        
        32bits
        
        double
        
        64bits
      - 字元
        char
        
        Unicode 6.2
        
        UTF-16 Big Endian
        
        2個位元組，中英文都是
      - 布林
        boolean
        
        true and false
      - 整數
        
        int
        
        4 bytes
        
        long
        
        8 bytes
        
        short
        
        2 bytes
  - - - ageOfStudent
        ageOfTeacher
    - - 宣告並給值後，就不能修改
  - - - +
        -
        *
        /
        %
    - - >
        >=
        ==
        <
        <=
        !=
    - - condition ? A : B
    - - &&
        ||
        !
    - - &
        |
        ~
        ^
      - >>
        <<
    - - i++
      - --
    - - +=
        =
        *=
        /=
        %=
        &=
        |=
        ^=
        <<=
        >>=
  - - - 3.14F
      - (float) 3.14
    - - 2147483648L
    - - int a = 10;
        double b = a * 3.14;
    - - 需要明確轉型
        
        short a = 1;
        
        short b = 2;
        
        short c = (short) (a + b);
      - 其它例子
        
        short a = 1;
        
        long b = 2;
        
        int c = (int) a + b;
    - - 3
- - - - jdk 7
        
        integer
        char
        enum
        string
      - before jdk7
        
        integer
        enum
        char
      - default is not necessary
  - - - break label
        離開整個區塊
      - conintue label
        
        label只能在for之前