Created this as a learning tool more than anything so the code is anything but perfect but it works. I've removed some proxy options should anyone like to pick this up have a look and see if you can add them back 

AccountCreator Class:

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.openqa.selenium.*;
import org.openqa.selenium.chrome.ChromeDriver;
import org.openqa.selenium.chrome.ChromeOptions;
import org.openqa.selenium.support.ui.ExpectedCondition;
import org.openqa.selenium.support.ui.WebDriverWait;

import java.io.*;
import java.net.URL;
import java.util.Random;
import java.util.Scanner;
import java.util.concurrent.TimeUnit;

public class AccountCreator {

    private static final String RUNESCAPE_URL = "https://secure.runescape.com/m=account-creation/create_account";
    private static final String RANDGEN_URL = "https://randomuser.me/api/?nat=gb";
    private static final String USER_AGENT = "Mozilla/5.0 (Windows NT x.y; rv:10.0) Gecko/20100101 Firefox/10.0";
    private static String CAPTCHA_SOLVER = "anticaptcha";
    private static String token = null;
    private static File accountFile = new File("accounts.txt");
    private static JsonObject account;

    public static void main(String[] args) throws Exception {

        System.out.println("Enter number of accounts to make:");
        Scanner sc = new Scanner(System.in);
        int accountsToMake = sc.nextInt();

        for(int x = 1; x <= accountsToMake; ++x) {
            System.out.println("Creating Account #" + x);

            account = getAccountDetails();

            int attempts = 0;

            while (token == null) {
                if (attempts < 5) {
                    switch (CAPTCHA_SOLVER) {
                        case "anticaptcha":
                            AntiCaptcha antiCaptcha = new AntiCaptcha();
                            token = antiCaptcha.solveCaptcha(RUNESCAPE_URL);
                            break;
                        case "twocaptcha":
                            // TODO: 2Captcha Support
                            break;
                    }
                    attempts++;
                } else {
                    System.out.println("Captcha Solver Failed 5 Times - Stopping");
                    System.gc();
                    System.exit(0);
                }
            }

            postForm(token, account);
            writeFile(account.get("email").getAsString() + ":" + account.get("password").getAsString() + ":" + account.get("displayname").getAsString());


            if (accountsToMake > 1) {
                System.out.println("Waiting 10 Seconds Before Next Account...");
                TimeUnit.SECONDS.sleep((long)10);
            }
        }

        System.out.println("Created All Accounts - Stopping");
        System.gc();
        System.exit(0);
    }

    private static void waitForLoad(WebDriver driver) {
        ExpectedCondition<Boolean> pageLoadCondition = new
                ExpectedCondition<Boolean>() {
                    public Boolean apply(WebDriver driver) {
                        return ((JavascriptExecutor) driver).executeScript("return document.readyState").equals("complete");
                    }
                };
        WebDriverWait wait = new WebDriverWait(driver, 30);
        wait.until(pageLoadCondition);
    }


    private static void postForm(String gresponse, JsonObject account) throws UnsupportedEncodingException, InterruptedException {
        System.setProperty("webdriver.chrome.driver", "chromedriver");

        WebDriver driver = new ChromeDriver();
        driver.manage().window().maximize();

        boolean created = false;
        boolean captchaFailed = false;

        while(!created && !captchaFailed) {
            driver.get(RUNESCAPE_URL);
            waitForLoad(driver);

            WebElement dobDay = driver.findElement(By.name("day"));
            WebElement dobMonth = driver.findElement(By.name("month"));
            WebElement dobYear = driver.findElement(By.name("year"));
            WebElement email = driver.findElement(By.name("email1"));
            WebElement displayname = driver.findElement(By.name("displayname"));
            WebElement password = driver.findElement(By.name("password1"));
            WebElement textarea = driver.findElement(By.id("g-recaptcha-response"));
            WebElement submit = driver.findElement(By.name("submit"));


            dobDay.sendKeys("01");
            dobMonth.sendKeys("01");
            dobYear.sendKeys("1990");
            email.sendKeys(account.get("email").getAsString());
            displayname.sendKeys(account.get("displayname").getAsString());
            password.sendKeys(account.get("password").getAsString());

            JavascriptExecutor jse = (JavascriptExecutor)driver;
            jse.executeScript("arguments[0].style.display = 'block';", textarea);

            textarea.sendKeys(gresponse);

            driver.switchTo().defaultContent();
            jse.executeScript("window.scrollBy(0,250)", "");
            TimeUnit.SECONDS.sleep(3);
            submit.sendKeys(Keys.ENTER);
            TimeUnit.SECONDS.sleep(3);
            waitForLoad(driver);

            if (driver.findElements(By.className("m-character-name-alts__name")).size() != 0) {
                System.out.println("Username In Use - Trying another");
                WebElement newUsername = driver.findElement(By.className("m-character-name-alts__name"));
                account.remove("displayname");
                account.addProperty("displayname", newUsername.getText());
                newUsername.click();
                waitForLoad(driver);
                submit.sendKeys(Keys.ENTER);
                TimeUnit.SECONDS.sleep(3);
            } else if (driver.findElements(By.className("google-recaptcha-error")).size() != 0) {
                captchaFailed = true;
            }

            waitForLoad(driver);

            if (driver.findElements(By.id("p-account-created")).size() != 0) {
                created = true;
                System.out.println("Account Created");
            } else {
                System.out.println("Failed To Create Account - Retrying");
            }

            token = null;
        }

        driver.quit();
    }

    private static JsonObject getAccountDetails() throws Exception {
        String json = readUrl(RANDGEN_URL);
        JsonParser jsonParser = new JsonParser();
        JsonObject firstNameObject = jsonParser.parse(json).getAsJsonObject().getAsJsonArray("results").get(0).getAsJsonObject().getAsJsonObject("name");
        String firstNameString = firstNameObject.get("first").getAsString();
        JsonObject lastNameObject = jsonParser.parse(json).getAsJsonObject().getAsJsonArray("results").get(0).getAsJsonObject().getAsJsonObject("name");
        String lastNameString = lastNameObject.get("last").getAsString();
        Random randMail = new Random();
        int setMail = randMail.nextInt(90) + 10;
        String mail = firstNameString + "." + lastNameString + setMail + "@gmail.com";
        Random rendpass = new Random();
        int setpass = rendpass.nextInt(70) + 10;
        String PASS_STRING = firstNameString.concat(String.valueOf(setpass));
        JsonObject usernames = jsonParser.parse(json).getAsJsonObject().getAsJsonArray("results").get(0).getAsJsonObject().getAsJsonObject("login");
        String user = usernames.get("username").getAsString();
        if (user.length() > 14) {
            Random randNum = new Random();
            int setNum = randNum.nextInt(90) + 10;
            user = user.substring(0, Math.min(user.length(), 10)) + setNum;
        }
        if (PASS_STRING.length() > 10) {
            Random randNum = new Random();
            int setNum = randNum.nextInt(90) + 10;
            PASS_STRING = PASS_STRING.substring(0, Math.min(user.length(), 10)) + setNum;
        }
        JsonObject account = new JsonObject();
        account.addProperty("email", mail);
        account.addProperty("displayname", user);
        account.addProperty("password", PASS_STRING);

        return account;
    }

    private static void writeFile(String account) {
        BufferedWriter writer = null;
        if (accountFile.exists()) {
            try(FileWriter fw = new FileWriter(accountFile, true);
                BufferedWriter bw = new BufferedWriter(fw);
                PrintWriter out = new PrintWriter(bw))
            {
                out.println(account);
            } catch (IOException e) {
            }
        } else {
            try {
                File logFile = new File( "accounts.txt");
                writer = new BufferedWriter(new FileWriter(logFile));
                writer.write(account + "\r\n");
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    writer.close();
                } catch (Exception e) {
                }
            }
        }
    }

    private static String readUrl(String urlString) throws Exception {
        BufferedReader reader = null;

        try {
            URL url = new URL(urlString);
            reader = new BufferedReader(new InputStreamReader(url.openStream()));
            StringBuilder buffer = new StringBuilder();
            char[] chars = new char[1024];

            int read;
            while((read = reader.read(chars)) != -1) {
                buffer.append(chars, 0, read);
            }

            String var7 = buffer.toString();
            return var7;
        } finally {
            if (reader != null) {
                reader.close();
            }

        }
    }
}

AntiCaptcha Class:

import com.anti_captcha.AnticaptchaBase;
import com.anti_captcha.Api.NoCaptcha;
import com.anti_captcha.Api.NoCaptchaProxyless;

import java.net.MalformedURLException;
import java.net.URL;

public class AntiCaptcha {

    private static String ANTICAPTCHA_KEY = "YOUR_KEY_HERE";
    private String token = null;

    public String solveCaptcha(String RUNESCAPE_URL) throws MalformedURLException, InterruptedException {
        NoCaptchaProxyless api = new NoCaptchaProxyless();
        api.setClientKey(ANTICAPTCHA_KEY);
        api.setWebsiteUrl(new URL(RUNESCAPE_URL));
        api.setWebsiteKey("6LccFA0TAAAAAHEwUJx_c1TfTBWMTAOIphwTtd1b");
        System.out.println("Sending Task To AntiCaptcha");

        if (!api.createTask()) {
            System.out.println(api.getErrorMessage());
        } else if (!api.waitForResult()) {
            System.out.println("Failed To Solve Captcha");
        } else {
            System.out.println("AntiCaptcha Task Complete");
            token = api.getTaskSolution().getGRecaptchaResponse();
        }

        return token;
    }

}

All libs are in the attached zip, be sure to add the com.anti_captcha library to your src when you compile.

I'm running on a mac so if you're on another OS be sure to download the correct version of Chrome Driver and update the following in the AccountCreator class:

System.setProperty("webdriver.chrome.driver", "chromedriver");

For example if you downloaded the windows version you would change to this:

System.setProperty("webdriver.chrome.driver", "chromedriver.exe");

Also note that the chrome driver file has to be in the same directory as your compiled Jar.

You can run this using the following:

java -jar YOUR_COMPILED_JAR_NAME.jar

Download the libs here: https://www.mediafire.com/file/44z4zl9t7x54hf2/AccountCreatorPackaged.zip/file

Can't upload to here them as they're larger than the max size however feel free to source the libs yourself.

Quote

    dobDay.sendKeys("01");
            dobMonth.sendKeys("01");
            dobYear.sendKeys("1990");

Why you no random(1,29),  (1,12), (1900,2004) !!

Antiban!

i set this up everything works but wont run script is it because its not in the folder if so wheres the folder?

even when i pick a script to run it doesnt, 

8 hours ago, jordan gamble said:

i set this up everything works but wont run script is it because its not in the folder if so wheres the folder?

even when i pick a script to run it doesnt, 

You're on the wrong thread - I didn't write that ^^ I wrote the chrome driver one in the OP.

 

Thanks for sharing, your code is going to be my start point to learn a bit about this! 

 

Why not just use HttpsURLConnection and write the parameters?

Nice thanks for share, will come in handy