code: protected static void printHelp() {
          System.out.println();
          System.out.println("Usage: java " + ZipExploder.class.getName() + " (-jar jarFilename... | -zip zipFilename...)... -dir destDir {-verbose}");
          System.out.println("Where:");
          System.out.println("  jarFilename path to source jar, may repeat");
          System.out.println("  zipFilename path to source zip, may repeat");
          System.out.println("  destDir    path to target directory; should exist");
          System.out.println("Note: one -jar or -zip is required; switch case or order is not important");
      }
docs: Print command help text.