Java

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

JDK, JRE

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

Version LTS

• 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
• jar
• war
• deploy
• maven
• gradle
• ant
• lombok
• excel
• decompiler

related

• servlet
• jsp

실행 경로

javaCopy
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