6, Javac command detailed

Javac[Options] [SourceFiles] The [@files] parameters can be arranged in any order.Optionscommand-line Options.SourceFilesOne or more source files to compile (for example, Myclass.java).@filesOne or more files that list the source files. First, view the command

-G	Generate all debugging information
-g:none	Do not generate any debug information
-g:{lines,vars,source}	Generate only some debugging information
-nowarn	Do not generate any warnings
-verbose	Output messages about the actions that the compiler is performing
-deprecation	Output source location using outdated APIs
-classpath < paths >	Specify where to find user class files
-CP < paths >	Specify where to find user class files
-sourcepath < paths >	Specify where to find the input source files
-bootclasspath < paths >	Overwrite the location of the boot class file
-extdirs < catalogue >	Overwrite the location of the installed extension directory
-endorseddirs < catalogue >	The location of the standard path that overrides the signature
-D < directories >	Specify the location where the generated class files are stored
-encoding < coding >	Specify the character encoding used by the source file
-source < version >	Provides source compatibility with a specified version
-target < version >	To generate a class file for a specific VM version
-version	Version information
-help	Summary of Output Standard options
-X	Output non-standard options for feeds
j< logo >	Pass < flag > directly to the runtime system

- D is to specify the output directoryFor example: javac-d./classes Helloworld.java means to place the Helloworld.java compiled bytecode file in the classes subdirectory of the current directory "note": ①: If the specified directory does not exist, Then the successful ② will not be created: if Helloworld.java has the package name and the package name is MyJava.study.day01, then the Helloworld.class file will be placed in: Current directory/classes/myjava/ Under the Study.day01/folder, automatically created if no path is changed

6, Javac command detailed