OKdevTV

Java

• 1995 James Gosling
• 1996 Sun Microsystems > Oracle Corporation(2010)

JDK, JRE

• Java Development Kit
• Java Runtime Environment
• JDK = JRE + javac

Version LTS

Release Family	End Of Support Life (EOSL)
18	September 2022(1)
17 LTS	September 2029
16	September 2021
15	March 2021
14	September 2020
13	March 2020
11 LTS	September 2026
10	September 2018
9	March 2018
8 LTS	December 2030
7 LTS	July 2022
6 LTS	December 2018
5 LTS	July 2015
4 LTS	March 2013
3 LTS	April 2011
2 LTS	December 2003
1 LTS	October 2002

• from: https://java.com/releases/

Install

• sdkman recommended
• https://github.com/ojdkbuild/ojdkbuild
• CentOS

yum list | grep jdk
sudo yum remove java-1.7.0-openjdk.x86_64 -y
sudo yum install java-1.8.0-openjdk-devel.x86_64 -y

• Ubuntu openjdk

sudo add-apt-repository ppa:openjdk-r/ppa

sudo apt-get update
sudo apt-get install openjdk-8-jdk -y

• Ubuntu oracle-jdk

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
sudo apt-get install oracle-java8-set-default

• mac

export JAVA_HOME="$(/usr/libexec/java_home -v 1.8)"

• 자바의신 1권 36p

기본 용어

• 패키지(package)

• 클래스(class)

• 메소드(method)

• 명령문(statement)

• 자바의신 1권 20p

• 들여쓰기(indent)

• 예약어(reserved word)

Other topic

• inheritance
• interface
• generic
• autoboxing
• annotation
• lambda
• future
• jdbc
• junit
• tomcat
• war
• deploy
• maven
• gradle
• ant
• lombok
• httpclient
• excel

참고

• 2시간만에 자바 시작
  • http://www.slideshare.net/kenu/java-in-2-hours
  • http://bit.ly/okjava2020
• 2시간만에 자바를 쉽게 배우고 싶어요.
  • http://www.slideshare.net/kenu/java-start01-in-2hours
• kenu's java
  • http://j.mp/okdevtv-java