Dynamic XPath in Selenium

package com.jbk;
//import java.sql.Driver;
import java.util.List;
import java.util.concurrent.TimeUnit;
//import org.junit.runners.Parameterized.Parameters;
//import org.apache.bcel.generic.Select; 
import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver; 
import org.openqa.selenium.WebElement;
import org.openqa.selenium.firefox.FirefoxDriver; 
import org.openqa.selenium.interactions.Actions; 
import org.openqa.selenium.support.ui.Select; 
import org.testng.Assert;
import org.testng.annotations.AfterSuite; 
import org.testng.annotations.BeforeSuite; 
import org.testng.annotations.Test;

public class Login_TestCase{
public static WebDriver driver;

@BeforeSuite(groups = "Smoke")
public static WebDriver setup_Browser() throws Exception { 
  driver = new FirefoxDriver(); 
  driver.manage().window().maximize();
  driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
  driver.get("file:///F:/offline%20website/index.html");
  return driver;
 }

@Test(priority = 1, groups = "Regression", description="To Check Project URL is Correct:")
   public static void Verify_Url() {
     // Actual url
     String my_url = driver.getCurrentUrl(); 
     System.out.println("page title is " + my_url);

     // expected url
     String expected_url = "file:///F:/offline%20website/ index.html";
     Assert.assertEquals(my_url, expected_url); 
     System.out.println("**************************");
     System.out.println("Test Case One with Thread Id:- "
                         + Thread.currentThread().getId());
   }

@Test(priority = 2, groups = "Regression", description="To verify Application Title: ")
   public void verifyApplicationTitle() {
     // Actual title
     String my_title = driver.getTitle(); 
     System.out.println("page title is " + my_title); 
     System.out.println("..........");
     // expected title
     String expected_title = "AdminLTE 2 | Log in";
     Assert.assertEquals(my_title, expected_title); 
     System.out.println("************************");
     System.out.println("Test Case two with Thread Id:- "
                         + Thread.currentThread().getId());
   }
   
@Test(priority = 3, groups = "Regression", description="")
   public void verify_Title() {
    String stitle = driver.findElement(By.xpath("//a[@href='index2. html']")).getText();
    String exp = "AdminLTE"; Assert.assertEquals(stitle, exp);
    System.out.println("Application title verify " + stitle);
    System.out.println("**********************");
 }
 
    // start Log In Session
@Test(priority = 4, groups = "Regression")
    public void loginsession() {
    driver.findElement(By.xpath("//p[contains(text(),'Sign in to start your session')]"));
    System.out.println("Sign in to start your session"); 
    System.out.println("***********************");
 }

@Test(priority = 5, groups = "Regression") 
   public void Check_PlaceHolder_Username() {
    String str	= driver.findElement(By.id("email")).getAttribute("placeholder");
    String exp = "Email"; 
    Assert.assertEquals(str, exp);
    System.out.println("placeholder Email-verified"); 
    System.out.println("*******************");
 }
 
@Test(priority = 6, groups = "Regression") 
   public void Check_PlaceHolder_Password() {
    String str = driver.findElement(By.xpath("//input[@id='password']")).getAttribute("placeholder");
    String exp = "Password"; Assert.assertEquals(str, exp);
    System.out.println("placeholder password- verified"); 
    System.out.println("*******************");
 }
 
@Test(priority = 7, groups = "Regression") 
   public void check_Button_color() {
    WebElement signbtn = driver.findElement(By.xpath("//button[@ class='btnbtn-primary btn-block btn-flat']"));
    System.out.println("befor mouse over button color is "+ signbtn.getCssValue("background-color"));
    Actions act = new Actions(driver);
    act.moveToElement(signbtn).build().perform(); 
    System.out.println("after mouse over button color "
                        + signbtn.getCssValue("color")); 
    System.out.println("*******************");
 }

@Test(priority = 8, groups = "Regression") 
   public void check_Links() {
     List< WebElement > links = driver.findElements(By.tagName("a"));
     System.out.println(links.size());
     System.out.println("........."); 
     for (inti = 0; i < links.size(); i++) {
        System.out.println(links.get(i).getText());
     }
 }

@Test(priority = 9, groups = "Regression") 
   public void blank_username_password() {
     WebElement stract = driver.findElement(By.xpath("//input[@type='text']"));
     stract.sendKeys(""); 
     String strexp = "sa";
     Assert.assertNotEquals(stract, strexp);
     WebElement passact = driver.findElement(By.xpath("//input[@ id='password']"));
     passact.sendKeys(""); 
     String passexp = "sa";
     driver.findElement(By.xpath("//button[@class='btnbtn- primary btn-block btn-flat']")).click();
     Assert.assertNotEquals(passact, passexp);
     String uname = driver.findElement(By.xpath("//div[@ id='email_error']")).getText();
     System.out.println(uname);
     String password = driver.findElement(By.xpath("//div[@ id='password_error']")).getText();
     System.out.println(password); System.out.println(".	");
 }

@Test(priority = 10, groups = "Regression")
   public void invalidusername_password() throws InterruptedException {
     WebElement stract = driver.findElement(By.id("email")); 
     stract.sendKeys("kiran12@gmail.com");
     String strexp = "kiran@gmail.com"; 
     Assert.assertNotEquals(stract, strexp); 
     Thread.sleep(2000);
     stract.clear();
     WebElement passact = driver.findElement(By.id("password")); 
     passact.sendKeys("12345");
     Thread.sleep(2000);
     passact.clear();
     String passexp = "123456"; 
     Assert.assertNotEquals(passact, passexp); 
     driver.findElement(By.xpath("//button[@class='btnbtn-primary btn-block btn-flat']")).click(); 
     System.out.println("Please enter email as kiran@gmail.com");
     System.out.println("Please enter password 123456");
     System.out.println("..........");
 }

@Test(priority = 11, groups = "Regression")
   public void validUsername_Password() throws InterruptedException {
    driver.findElement(By.xpath("//input[@id='email']")).sendKeys("kiran@gmail.com");
    driver.findElement(By.xpath("//input[@id='password']")).sendKeys("123456");
    driver.findElement(By.xpath("//button[@class='btnbtn-primary btn-block btn-flat'])).click();
    System.out.println("Online");  
    System.out.println("............");
}

@Test(priority = 12, groups = "Smoke") 
   public static void Verify_Url_DashBoard() {
    // Actual url
    String my_url = driver.getCurrentUrl(); 
    System.out.println("page title is " + my_url);
    // expected url
    String expected_url	= "file:///F:/offline%20website/ pages/examples/dashboard.html";
    Assert.assertEquals(my_url, expected_url);
    System.out.println("**************************");
 }

@Test(priority = 13, groups = "Smoke")
   public void verifyApplicationTitle_DashBoard() {
    // Actual title
    String my_title = driver.getTitle(); 
    System.out.println("page title is " + my_title); 
    System.out.println("...........");
    // expected title
    String expected_title = "AdminLTE 2 | Dashboard"; 
    Assert.assertEquals(my_title, expected_title);
    System.out.println("************************");
 }

@Test(priority = 14, groups = "Smoke")
   public void heading_Dashboard() throws InterruptedException {
    String stitle = driver.findElement(
    By.xpath("//h1[contains(text(),'Dashboard')]")).getText();
    String exp = "Dashboard Control panel"; 
    Assert.assertEquals(stitle, exp); 
    System.out.println("Application title verify " + stitle);
    System.out.println("**********************"); 
    Thread.sleep(2000);
 } 

@Test(priority = 15, groups = "Unit")
   public void click_OnUser() throws InterruptedException {
    driver. findElement(By.xpath("//a[@href='users. html']")).click();
    Thread.sleep(2000);
    driver.findElement(By.xpath("//span[@class='labellabel-danger']")).click();
    // click on 1St delete button @SuppressWarnings("unused")
    Alert alt = driver.switchTo().alert();
    System.out.println(driver.switchTo().alert().getText());
    driver.switchTo().alert().accept();
 }
 
@Test(priority = 16, groups = "Unit")
   public void getTableData() throws InterruptedException {
    WebElement Table = driver.findElement(By.xpath("//table[@ class='table table-hover']"));
    List< WebElement >tr =Table.findElements(By.tagName("tr")); 
    System.out.println("total no of rows " + tr.size()); 
    for (WebElement row : tr) {
       List< WebElement > td = row.findElements(By.tagName("td")); 
       for (WebElement col : td) {
          System.out.println(col.getText());
       }
    System.out.println(".........");
   }
   Thread.sleep(2000);
 }
 
@Test(priority = 17, groups = "Unit") 
   public void Click_On_AddUser_Btn() throws InterruptedException {
    driver.findElement(By.xpath("//button[@class='btnbtn-block btn-primary btn-sm pull-right']")).click();
    Thread.sleep(2000);
 }

@Test(priority = 18, groups = "Unit")
   public void Fill_Form() throws InterruptedException {
    WebElement uname = driver.findElement(By.xpath("//input[@ id='username']"));
    uname.sendKeys("Akshay"); 
    Thread.sleep(2000);
    WebElement mobile = driver.findElement(By.xpath("//input[@id='mobile']"));
    mobile.sendKeys("8605218926");
    Thread.sleep(2000);
    WebElement email = driver.findElement(By.xpath("//input[@id='email']"));
    email.sendKeys("akshay@gmail.com"); 
    Thread.sleep(2000);
    WebElement gender = driver.findElement(By.xpath(".//*[@id='Male']"));
    gender.click();
    Thread.sleep(2000);
    WebElement we = driver.findElement(By.xpath("//select[@class='form- control']"));
    Select s = new Select(we); 
    s.selectByVisibleText("Maharashtra");
    WebElement password = driver.findElement(By.xpath("//input[@ id='password']"));
    password.sendKeys("Akshay"); 
    Thread.sleep(2000);
    driver.findElement(By.xpath("//button[@id='submit']")).
    submit();
    Thread.sleep(2000); 
    @SuppressWarnings("unused")
      Alert alt2 = driver.switchTo().alert(); 
      Thread.sleep(1000);
      System.out.println(driver.switchTo().alert().getText());
      driver.switchTo().alert().accept();
 }
 
@Test(priority = 19, groups = "Unit")
   public void clickOn_OperatorBtn() throws InterruptedException {
    driver.findElement(By.xpath("//span[text()='Operators']")).click();
    Thread.sleep(3000);
    // Get Operator table Data
    //driver.manage().timeouts().implicitlyWait(5, TimeUnit.SECONDS);
    WebElement Table1 = driver.findElement(By.xpath("//table[@ class='table table-hover']"));
    List< WebElement >tr1=Table1.findElements(By.tagName("tr")); 
    System.out.println("total no of rows " + tr1.size()); 
    for (WebElement row1 : tr1) {
      List< WebElement > td1 = row1.findElements(By.tagName("td")); 
      for (WebElement col1 : td1) {
         System.out.println(col1.getText());
      }
    System.out.println("........");
   }
   Thread.sleep(2000);
 }

@Test(priority = 20, groups = "Unit") public void logOutBtn() {
   driver.findElement(By.xpath("//a[text()='LOGOUT']")).click();
   System.out.println(driver.findElement(By.xpath("//p[contains(text(),'Logout successfully')]")).getText());
 }

@AfterSuite(groups = "Smoke")
   public void close_Browse() {
     driver.close();
  }
}