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)
22	September 2024
21 LTS	September 2031
20	September 2023
19	March 2023
18	September 2022
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://learn.microsoft.com/en-us/java/openjdk/download
• https://openjdk.org/projects/jdk

기본 용어

• 패키지(package)

• 클래스(class)

• 메소드(method)

• 명령문(statement)

• 자바의신 1권 20p

• 들여쓰기(indent)

• 예약어(reserved word)

Format

• google style
  • https://google.github.io/styleguide/javaguide.html
  • https://github.com/google/styleguide
  • https://raw.githubusercontent.com/google/styleguide/gh-pages/eclipse-java-google-style.xml

Other topic

• inheritance
• interface
• generic
• autoboxing
• annotation
• synchronized
• lambda
• future
• stream
• optional
• enum
• jdbc
• junit
• tomcat
• war
• deploy
• maven
• gradle
• ant
• lombok
• excel

related

• servlet
• jsp

실행 경로

public class CheckDirectory {
  public static void main(String args[]) {
    Path currentPath = Paths.get("");
    String path = currentPath.toAbsolutePath().toString();
    System.out.println("현재 작업 경로: " + path);
  }
}

• from: https://7942yongdae.tistory.com/121

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

What Else?

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