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Commons CLI API - Options with Arguments Example
Where to get a Java example of managing Options with Arguments with Commons CLI API?
✍: FYIcenter.com
Here is good Java example of managing Options with Arguments with Commons CLI API,
ShortOptionTest.java:
// Copyright (c) 2018 FYIcenter.com import org.apache.commons.cli.Options; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.DefaultParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.UnrecognizedOptionException; public class ArgumentOptionTest { public static void main(String[] args) throws Exception { // Define a long option: --help -help -h Options options = new Options(); options.addOption("h", "help", false, "Print this help message"); // Define an option with argument: --input ..., -input ..., -i ... options.addOption("i", "input", true, "Input string"); try { // Parse options CommandLineParser parser = new DefaultParser(); CommandLine cmd = parser.parse(options, args); // Process options if (cmd.hasOption("help")) { help(options); } else if (cmd.hasOption("input")) { System.out.println("Hello "+cmd.getOptionValue("input")); } } catch (UnrecognizedOptionException e) { System.out.println("Invalid options: "+e.getOption()); help(options); } } public static void help(Options options) { // Print options HelpFormatter formatter = new HelpFormatter(); formatter.printHelp("ArgumentOptionTest", options); } }
You can compile and run it with commons-cli-1.4.jar:
C:\fyicenter>javac -cp C:\fyicenter\commons-cli-1.4\commons-cli-1.4.jar ArgumentOptionTest.java C:\fyicenter>java -cp .;C:\fyicenter\commons-cli-1.4\commons-cli-1.4.jar ArgumentOptionTest -i world Hello world C:\fyicenter>java -cp .;C:\fyicenter\commons-cli-1.4\commons-cli-1.4.jar ArgumentOptionTest -input world Hello world C:\fyicenter>java -cp .;C:\fyicenter\commons-cli-1.4\commons-cli-1.4.jar ArgumentOptionTest --input world Hello world C:\fyicenter>java -cp .;C:\fyicenter\commons-cli-1.4\commons-cli-1.4.jar ArgumentOptionTest --insert world Invalid options: --insert usage: ArgumentOptionTest -h,--help Print this help message -i,--input <arg> Input string
⇒ Commons CLI API - Option Class
⇐ Commons CLI API - Options with Arguments
2020-05-15, 988🔥, 0💬
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