// 컴파일
$ javac fileName.java

// 실행
$ java fileName.class

➜  $ javac -help
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 process
  -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

// 다른버전(예 14버전)으로 작성된 소스를 8버전 타겟으로 컴파일
$ javac FileName.java -source 1.8 -target 1.8

//클래스파일의 버전을 확인하려면 javap 로 확인가능
//해당 클래스파일의 호환 버전 확인 방법
$ javap -verbos class명 | find /N "version"

// javap 로 바이트코드를 보면 사람이 읽을 수 있는 형태(OP코드)로 해석해서 보여줌
$ javap -c Hello.class

public class Hello {
  public Hello();
    Code:
      0: aload_0
      1: invokespecial  #1      // Method java/lang/Object."<init>":()V
      4: return

  public static void main(java.lang.String[]);
    Code:
      0: getstatic      #7      // Field java/lang/System.out:Ljava/io/PrintStream;
      3: ldc            #13     // String Hello java
      5: invokevirtual  #15     // Method java/io/PrintStream.println:(Ljava/lang/String;)V
      8: return
}