Java Fun

2nd Draft: I switched to a different dataType that required less work on my part. In a file named WhoAreYou.java:

import java.util.Properties;    


/*
 * What is the purpose of a comment?
 * this is a block-style comment
 */

public class WhoAreYou
{
    // this is a single-line comment
    public static void main(String[] args) {
        Properties nameInfo = extractName(args);
        System.out.println("Hi you must be " + nameInfo.getProperty("fullName"));
    }

    // this class method does all the work...
    public static Properties extractName(String[] name) {
        Properties props = new Properties(); // special variable type (see below)
        String fullName; // just create a variable, but do not give it a value, yet
        // set default values for the name
        String firstName = "Name";
        String lastName = "Unknown";
        String middleName = "";
        
        if (name.length > 1) { // remember name is an array of strings. I am counting how-many strings
         if (name.length < 2) {
            // if only 1 string then it is just a first name...
            firstName = name[0];
          } else if (name.length < 3) {
            // if only 2 strings then it is first & last name
            firstName = name[0];
            lastName = name[1];
          } else if (name.length < 4) {
            // if all 3 strings then i am assuming it is first, middle & last name(s)
            firstName = name[0];
            middleName = name[1];
            lastName = name[2];
          }
        }

        // you can google for the "Java Property" class to learn how this works:
        props.setProperty("firstName", firstName); // (key, value)
        props.setProperty("lastName", lastName); // (key, value)
        props.setProperty("middleName", middleName); // (key, value)
        props.setProperty("fullName", firstName + " " + middleName + " " + lastName); // (key, value)

		return props;
    }
}

First Draft in a file named "MyFirtProgram1.java":

    
import java.util.HashMap;
import java.util.Map;

/*
 * What is the purpose of a comment?
 * this is a block-style comment
 */



public class MyFirstProgram1
{
    // this is a single-line comment
    public static void main(String[] args) {
        Map nameInfo = extractName(args);
        // System.out.println("Hi you must be " + nameInfo.fullName); // commented-out, because it's bad syntax
        System.out.println("Hi you must be " + nameInfo.get("fullName"));
    }

    // this class method does all the work:
    // the data-type I'm using (i.e. Map) is flexible, but more work than I need for this program...
    public static Map extractName(String[] name) {
        Map map = new HashMap<>();
        String fullName;
        String firstName = "Name";
        String lastName = "Unknown";
        String middleName = "";
        
        if(name.length < 2) {
            firstName = name[0];
        } else if (name.length < 3) {
            firstName = name[0];
            lastName = name[1];
        } else if (name.length < 4) {
            firstName = name[0];
            middleName = name[1];
            lastName = name[2];
        }
		map.put("fullName", firstName + " " + lastName);
		map.put("firstName", firstName);
		map.put("lastName", lastName);
		map.put("middleName", middleName);
		
		return map;
    }
}