How do I parse command line arguments in Java?

To parse command line arguments in Java, you can use the main() method of your application's entry point class.

The main() method is the entry point of a Java program and is called by the JVM when the program starts. It takes an array of strings as an argument, which represents the command line arguments passed to the program.

Here is an example of how to parse command line arguments in the main() method:

public class MyApplication {

    public static void main(String[] args) {
        for (int i = 0; i < args.length; i++) {
            String arg = args[i];
            if (arg.equals("-h")) {
                printUsage();
            } else if (arg.equals("-f")) {
                String fileName = args[++i];
                // process file
            } else {
                // invalid argument
            }
        }
    }

    private static void printUsage() {
        // print usage information
    }

}

In this example, the main() method iterates over the array of command line arguments and checks for the presence of the -h and -f arguments. If the -h argument is found, the printUsage() method is called to print usage information. If the -f argument is found, the next argument is assumed to be the file name and is processed.

You can also use a library such as Apache Commons CLI to parse command line arguments in a more flexible and user-friendly way.

I hope this helps. Let me know if you have any questions.