The eight basic data types in Java are: int, short, float, double, long, boolean, byte, and char.
Their encapsulation classes are: Integer, Short, Float, Double, Long, Boolean, Byte, Character.
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The values in Java are all signed. There are no unsigned numbers. Their value range is also fixed and will not change with changes in the hardware environment or operating system.
Primitive data types are passed by value when passing parameters, and encapsulated classes are passed by reference.
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