JAVA v19-01-31

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PRIMITIVE DATA TYPS

Type	Size	Range	Default	Class & Field
byte	8 bit	-2^7 to 2^7 -1	0
short	16 bit	-2^15 to 2^15 -1	0
int	32-bit	-2^31 to 2^31 -1	0	Integer.MIN_VALUE to Integer.MAX_VALUE
long	64 bit	-2^63 to 2^63-1	0L
float	32 bit	-3.4E38 to 3.4E38	0f
double	64 bit	-1.7E308 to 1.7E308	0d
char	16 bit	'\u0000' to '\uffff' (0 to 65,565)	'\u0000'
boolean	1 bit		false

OPERATORS

Arithmetic      + - * / & ++ --
Relational      == != > < >= <=
Bitwise         & | ^ ~ << >> >>>
Logical         && || !
Assignment      = += -= *= /= %= <<= >>=  &= ^= |=
Miscellaneous   ?: instanceof

MODIFIER

                Class Package Subclass World
private            ok       -        -     -
default            ok      ok        -     -
protected          ok      ok       ok     -
public             ok      ok       ok    ok

TERMINAL

$ java -version; javac -version
# apt-get install default-jdk default-jdk-doc
# apt-get install openjdk-11-jdk openjdk-11-doc
# update-java-alternatives -l
# update-java-alternatives -s java-1.11.0-openjdk-amd64
# update-alternatives --display java
# update-alternatives --config java
$ screen vim ~/java/Main.java
$ ( cd ~/java/; vim Main.java )

TUTORIALS

tutorialspoint.com/java/index.htm
chortle.ccsu.edu/java5/index.html
oreilly.com/openbook/javawt/book/index.html

• White Paper       : oracle.com/technetwork/java/langenv-140151.html
• Getting Started   : docs.oracle.com/javase/tutorial/getStarted/index.html
• Language Basics   : docs.oracle.com/javase/tutorial/java/nutsandbolts/index.html
• Object-Oriented Programming Concepts : docs.oracle.com/javase/tutorial/java/concepts/index.html
• Classes and Objects : docs.oracle.com/javase/tutorial/java/javaOO/index.html
• Interfaces and Inheritance : docs.oracle.com/javase/tutorial/java/IandI/index.html
• Numbers and Strings : docs.oracle.com/javase/tutorial/java/data/index.html
• Packages          : docs.oracle.com/javase/tutorial/java/package/index.html
• Exceptions        : docs.oracle.com/javase/tutorial/essential/exceptions/index.html
• Basic I/O         : docs.oracle.com/javase/tutorial/essential/io/index.html
• Concurrency       : docs.oracle.com/javase/tutorial/essential/concurrency/index.html
• Generics          : docs.oracle.com/javase/tutorial/java/generics/index.html
• Annotations       : docs.oracle.com/javase/tutorial/java/annotations/index.html
• Swing             : tutorialspoint.com/swing/index.htm