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Apache Commons CLI - Usage Example
Apache Commons CLI provides HelpFormatter class to print the usage guide of command line arguments. See the example given below −
Example
CLITester.java
import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; public class CLITester { public static void main(String[] args) throws ParseException { Options options = new Options(); options.addOption("p", "print", false, "Send print request to printer.") .addOption("g", "gui", false, "Show GUI Application") .addOption("n", true, "No. of copies to print"); HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("CLITester", options); } }
Output
Run the file and see the result.
java CLITester usage: CLITester -g,--gui Show GUI Application -n <arg> No. of copies to print -p,--print Send print request to printer.
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