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Commons CLI API - Short Options
How to manage short options with Apache Commons CLI API?
✍: FYIcenter.com
A short option is a single character option prefixed with "-".
For example, "-h" is a short option.
A short option can be managed with Apache Commons CLI API in 4 steps:
1. Define Options - A short option can be defined and added to the options collection by calling the addOption() method with 2 arguments. For example:
import org.apache.commons.cli.Options; Options options = new Options(); options.addOption("h", "Print this help message");
2. Parse Options - A short option can be parsed together with all other options in a single call of CommandLineParser.parse(). For example:
import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.DefaultParser; CommandLineParser parser = new DefaultParser(); CommandLine cmd = parser.parse( options, args);
3. Process Options - A short option can be processed by calling the CommandLine.hasOption() method. For example:
if (cmd.hasOption("h")) { help(options); }
4. Print Options - A short optoin can be printed out as help message together with all other options. For example:
import org.apache.commons.cli.HelpFormatter; HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("ShortOptionTest", options);
⇒ Commons CLI API - Short Options Example
⇐ Using commons-cli.jar in Java Programs
2020-12-22, 616🔥, 0💬
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