BasicOptions3.java

// check to see if they need help
// notice we only use the short-version, but it checks both!
if(cmdLine.hasOption("h")) {
    new HelpFormatter().printHelp("sop4j-cli", options);
    return;
}

// check to see if they passed in an opt
// recommended to use the long version as it's more readable
if(cmdLine.hasOption("opt")) {
    System.out.println("Found opt!");
}

// get -D options and their values
if(cmdLine.hasOption("D")) {
    Properties props = cmdLine.getOptionProperties("D");
    
    for(Entry<Object, Object> entry:props.entrySet()) {
        System.out.println("Property: " + entry.getKey() + " " + entry.getValue());
    }
}

// see if we have a file option by checking it's value
String file = null;
if(null != (file = cmdLine.getOptionValue("file")) ) {
    System.out.println("File option: " + file);
}