The use guide for the use of the "Typed Command Line Parser" framework in the Java class library
The use guide for the use of the "Typed Command Line Parser" framework in the Java class library
‘Typed Command Line Parser’ is a convenient and powerful Java class library for parsing the command line parameters.It provides a simple method to define and analyze the command line options and convert them into Java objects.
1. Installation and configuration:
-We first, you need to add the dependencies of ‘Typed Command Line Parser’ in your Java project.You can add the following dependencies in Maven or Gradle projects:
<dependency>
<groupId>com.github.tomaslanger.cli</groupId>
<artifactId>typed-command-line-parser</artifactId>
<version>1.0.0</version>
</dependency>
-After adding dependencies, you can use this library in your Java class.
2. Define the command line options:
-We first, you need to define your command line options and parameters.You can achieve them by creating a Java class.For example, suppose you want to analyze the following command line options:
--name John --age 25 --gender male
You can create a Java class called `CommandLineoptions` to represent them:
public class CommandLineOptions {
@Option(name = "--name")
public String name;
@Option(name = "--age")
public int age;
@Option(name = "--gender")
public String gender;
}
In this example, there are three member variables in the `CommandLineOptions` class, which represent the options of` --name`, `-Age` and`-Gender.
3. Analyze the command line parameters:
-Once you define your command line options, you can use the 'Typed Command Line Parser' to analyze the command line parameters and convert them into the Java object you defined.The following is an example code:
public class Main {
public static void main(String[] args) {
CommandLineOptions options = new CommandLineOptions();
CommandLineParser.parse(options, args);
System.out.println("Name: " + options.name);
System.out.println("Age: " + options.age);
System.out.println("Gender: " + options.gender);
}
}
In this example, we first created an object of `CommandLineOptions.Then, we use the method of the command line parameters and assign them to the member variables of the `Options`.Finally, we print the value obtained after the parsing.
4. Running program:
-Now you can compile and run your Java program.You can provide command line options in the command line to analyze.For example, you can run the following command:
java Main --name John --age 25 --gender male
This will output:
Name: John
Age: 25
Gender: male
In this way, you successfully use the 'Typed Command Line Parser' framework to resolve the command line parameters.
Summarize:
‘Typed Command Line Parser’ is a convenient and powerful Java class library for parsing the command line parameters.By defining your command line options and parameters, and using this framework to analyze them, you can easily handle and convert command line parameters.Through simple configuration and several lines, you can quickly build a powerful command line parser.
