javac: invalid flag: -dd
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
  -sourcepath <path>        Specify where to find input source files
  -bootclasspath <path>     Override location of bootstrap class files
  -extdirs <dirs>           Override location of installed extensions
  -d <directory>            Specify where to place generated class 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
  -help                     Print a synopsis of standard options

files/cli/test3/Main.java:6: package test1 does not exist
    test1.Main.main(args);
         ^
files/cli/test3/Main.java:8: package test2 does not exist
    test2.Main.main(args);
         ^
2 errors
files/cli/test3/Main.java:6: package test1 does not exist
    test1.Main.main(args);
         ^
files/cli/test3/Main.java:8: package test2 does not exist
    test2.Main.main(args);
         ^
2 errors