The VERY Basics of Java

Java is very much like its cousin C++, but simpler.
All array indices start at 0, like in C/C++. Hence, myArray[10] would be the 11^th element in the array myArray.

Some Java Operators

Operator	Meaning
+	add
-	subtract
*	multiply
/	divide
%	remainder (modulus) - even works on floating-point numbers!
=	assigment operator ( := in pascal)
==	equal to
!=	not equal to
<	less than
>	greater than
<=	less than or equal to
>=	greater than or equal to
~	bitwise NOT
!	logical NOT
|	bitwise OR
||	logical OR
&	bitwise AND
&&	logical AND
<<	left shift
>>	right shift
>>>	right shift, zero fill
^	bitwise XOR
++	increment value by one
--	decrement value by one

Built-in types for Java

Type	Contains	Size	Min Value / Max Value
boolean	true or false	1 bit	N/A N/A
char	Unicode character	16 bits	\u0000 \uFFFF
byte	signed integer	8 bits	-128 127
short	signed integer	16 bits	-32,768 32,767
int	signed integer	32 bits	-2,147,483,648 2,147,483,647
long	signed integer	64 bits	-9,223,372,036,854,775,808 9,223,372,036,854,775,807
float	IEEE 754 floating-point	32 bits	3.40282347E+38 1.40239846E-45
double	IEEE 754 floating-point	64 bits	1.79769313486231570E+308 4.94065645841246544E-324

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