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Data Types

 

Byte Data Type

syntax:    byte variable;

Values that can be stored in a byte variable are as follows:

Inital Value

Storage in Memory

Value range

0 8 bits -128 -- 127

Used in a line of code:

    byte number;

Short Data Type

syntax:    short variable;

Values that can be stored in a short variable are as follows:

Inital Value Storage in Memory Value range
0 16 bits -32768 -- 32767

Used in a line of code:

    short number;

Integer Data Type

syntax:    int variable;

Vaules that can be stored in a int variable are as follows:

Inital Value Storage in Memory Value range
0 32 bits -2147483648 -- 2147483647

Used in a line of code:

    int number;

Long Integer Data Type

syntax:    long variable;

Vaules that can be stored in a long variable are as follows:

Inital Value Storage in Memory Value range
0 64 bits -1018 -- 1018

Used in a line of code:

    long number;

Floating point decimal Data Types

syntax:    float variable;

Values that can be stored in a float variable are as follows:

Inital Value Storage in Memory Values range
0.0 32 bits -1038 -- 1038

Used in a line of code:

    float number;

Double Floating point decimal Data Types

syntax:    double variable;

Values that can be stored in a double variable are as follows:

Inital Value Storage in Memory Values range
0.0 64 bits -10308 -- 10308

Used in a line of code:

    double number;

Boolean Data Type

syntax:    boolean variable;

Values that can be stored in a boolean variable are true & false.

Used in a line of code;

    boolean isSmart = true;

Type Casting

    int num1; short num2; byte num3; float num4; double num5;

    num5 = (double)( num1 + (int) num2) - (double)((float) num3 -   num4);

The last line changes variable types so that numbers can be added together.

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