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Access identifiers

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Constructors

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label

is a marker for a statement. E.g. label :

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Statement

a high-level instruction e.g. x=x+1

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block

is a pair of curly brackets enclosing one or more statements

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Operators

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Use operator new to create a new instance of an object; binary operator instanceof to test whether the specified class or one of its subclasses

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Array storage and initialization

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Array dimensions

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boolean

requires one bit of space

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Character types

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Floating-point types

2 types: float(32 bits) and double(64 bits). Value is NaN (not a number) when it's overflow or underflow

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Wrap around of an integer value

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Integer type

Unlike the Integer class, there is no behavior associated with it. It has 4 types: byte(8 bits), short(16 bits), int(32 bits), long(64 bits). It is signed - contains both positive and negative values

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Two types of categories

Base - cannot be broken down: integer, floating point, character, boolean Composite - arrays, classes, interfaces

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this

In the methods, variable this is used to refer to the class itself, not the local variable in the method

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Unicode

each has 16 bits and is sufficient to handle most of the world's languages

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