[Java#1] Java Setting

[ java setting ]

1. oracle.com >> jdk download >> 설치

2. 환경변수 설정 ( 내컴퓨터 속성 >> 고급시스템설정 >> 고급 >> 환경변수 >> 시스템변수)

    * 시스템 변수는 일반적으로 대문자로 사용함(소문자가 안되는건 아님)

> 새로만들기

	변수이름	값(경로)
2-1	JAVA_HOME	C:\Program Files\Java\jdk1.8.0_202
2-2	CLASSPATH	.

> 편집

	변수이름	값(경로)
2-3	PATH	%JAVA_HOME%\bin; -- 기존 경로 앞에다가 붙이기

3. 설정 확인 CMD

> java -version

>java -version

C:\Users\Administrator>java -version

java version "1.8.0_202"

Java(TM) SE Runtime Environment (build 1.8.0_202-b08)

Java HotSpot(TM) 64-Bit Server VM (build 25.202-b08, mixed mode)

> javac

>javac

Usage: javac <options> <source files>

where possible options include:

  -g                         Generate all debugging info

  -g:none                    Generate no debugging info

  -g:{lines,vars,source}     Generate only some debugging info

  -nowarn                    Generate no warnings

  -verbose                   Output messages about what the compiler is doing

  -deprecation               Output source locations where deprecated APIs are used

  -classpath <path>          Specify where to find user class files and annotation processors

  -cp <path>                 Specify where to find user class files and annotation processors

  -sourcepath <path>         Specify where to find input source files

  -bootclasspath <path>      Override location of bootstrap class files

  -extdirs <dirs>            Override location of installed extensions

  -endorseddirs <dirs>       Override location of endorsed standards path

  -proc:{none,only}          Control whether annotation processing and/or compilation is done.

  -processor <class1>[,<class2>,<class3>...] Names of the annotation processors to run; bypasses default discovery proce

ss

  -processorpath <path>      Specify where to find annotation processors

  -parameters                Generate metadata for reflection on method parameters

  -d <directory>             Specify where to place generated class files

  -s <directory>             Specify where to place generated source files

  -h <directory>             Specify where to place generated native header files

  -implicit:{none,class}     Specify whether or not to generate class files for implicitly referenced files

  -encoding <encoding>       Specify character encoding used by source files

  -source <release>          Provide source compatibility with specified release

  -target <release>          Generate class files for specific VM version

  -profile <profile>         Check that API used is available in the specified profile

  -version                   Version information

  -help                      Print a synopsis of standard options

  -Akey[=value]              Options to pass to annotation processors

  -X                         Print a synopsis of nonstandard options

  -J<flag>                   Pass <flag> directly to the runtime system

  -Werror                    Terminate compilation if warnings occur

  @<filename>                Read options and filenames from file