Fieldlevel validation in Selenium Webdriver (Java)

 Check Filedlevel Validation in Selenium Webdriver(Java)

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class Validations {
public static WebDriver d;
    public static void main(String []args)throws Exception{
        d = new FirefoxDriver();
        d.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        d.get("http://www.vrlbus.in/vrl2013/register_customer.aspx");
        d.findElement(By.id("FIRSTNAME")).sendKeys("#!#!#$@#!$@!$@#$%#%^#$^^&%&$%*");
        d.findElement(By.id("Button1")).click();
        String alertMessage = d.switchTo().alert().getText();
        System.out.println(alertMessage);
      if (alertMessage.equals("First name Should not contain Special Characters")){
            System.out.println("Error displayed: First name Should not contain Special Characters");
            d.switchTo().alert().dismiss();
        } else{
            System.out.println("Accepted");
        }
        d.findElement(By.id("FIRSTNAME")).sendKeys("acbcdefghijklmnopqrstuvwxyzabcdef");
        d.findElement(By.id("Button1")).click();
         if (alertMessage.equals("First name Should not contain Special Characters")){
                System.out.println("Error displayed: First name Should not contain Special Characters");
                d.switchTo().alert().dismiss();
            } else{
                System.out.println("Accepted");
            }
        d.quit();
    }  
}


Second example


public static void main(String[] args) throws Exception {
    String[] invalidChars = {"#", "!", "$", "@", "%", "^", "&"};
    String name = "acbcdefghijklmnopqrstuvwxyzab";
    d = new FirefoxDriver();
    d.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
    d.get("http://www.vrlbus.in/vrl2013/register_customer.aspx");
    for (String invalid : invalidChars) {
        d.findElement(By.id("FIRSTNAME")).clear();
        d.findElement(By.id("FIRSTNAME")).sendKeys(name + invalid);
        d.findElement(By.id("Button1")).click();
        String alertMessage = d.switchTo().alert().getText();
        System.out.println(invalid);
        if (alertMessage.equals("First name Should not contain Special Characters")) {
            System.out.println("Error displayed: First name Should not contain Special Characters");
            d.switchTo().alert().dismiss();
        } else {
            System.out.println("Accepted");
        }
    }
    d.findElement(By.id("FIRSTNAME")).sendKeys("acbcdefghijklmnopqrstuvwxyzabcdef");
    d.findElement(By.id("Button1")).click();
    String alertMessage = d.switchTo().alert().getText();
    if (alertMessage.equals("First name Should not contain Special Characters")) {
        System.out.println("Error displayed: First name Should not contain Special Characters");
        d.switchTo().alert().dismiss();
    } else {
        System.out.println("Accepted");
    }
    d.quit();
}