Data types

Primitive data types:

• byte:

  • A signed 8-bits of integer type, which has a minimum value of -128 and a maximum value of 127.

• short:

  • A signed 16-bits of integer type, which has a minimum value of -32,768 and a maximum value of 32,767.

• int:

  • A signed 32-bits of integer type, which has a minimum value of -2³¹ and a maximum value of 2³¹-1.

• long:

  • A signed 64-bits of integer type, which has a minimum value of -2⁶³ and a maximum value of 2⁶³-1.

• float:

  • A signed 32-bits of decimal type.

• double:

  • A signed 64-bits of decimal type.

• boolean:

  • Has only two possible values: true and false. Use this data type for simple flags that track true/false conditions. This data type represents one bit of information.

• char:

  • Is a single 16-bits Unicode character. It has a minimum value of '\u0000' (or 0) and a maximum value of '\uffff'.

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Non-primitive data types:

• called reference types because they refer to objects
• built-in types: Strings, Arrays, ...
• custom data types as utilizing class construct to built your own type based on the business need

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