Usage: javac usage: javac <; Option > < Source file > Among them, the possible options include: -g: generate all debugging information -g:none does not generate any debugging information -g:{lines,vars,source} only generates some debugging information -nowarn does not generate any warning -verbose outputs messages about what the compiler is doing -deprecation outputs the source location using outdated API-classpath <: Path > Specify the location to find user class files-CP <; Path > Specify the location to find user class files-sourcepath <; Path > Specify the location to find the input source file-boot classpath <; Path > Overwrite the location of the boot class file-extdirs <; Directory > Location of the extended directory in cover the installation-Endorsed Dirs <; Directory > The location of the standard path that overrides the signature-d <; Directory > Specify the location to store the generated class file-encoding <; Code > Specifies the character encoding used by the source file-source <; Version > Provide source compatibility with the specified version-target <; Version > Generate a class file of a specific VM version -version information -help output the summary of standard options -X output the summary of non-standard options-j <; Logo > Directly put <: Logo > Pass to the runtime system