selenium - How to add explicit wait in PageFactory in PageObjectModel?

Question

I have added hardcode wait thread.sleep() in my below code. How to use explicit wait. I want to wait till "username" WebElement appear. My program is working perfectly. I have already written testcases.

package com.pol.zoho.PageObjects;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.FindBy;
import org.openqa.selenium.support.PageFactory;
import org.openqa.selenium.support.ui.WebDriverWait;

public class ZohoLoginPage {

WebDriver driver;
public ZohoLoginPage(WebDriver driver)
{
    PageFactory.initElements(driver, this);
}

@FindBy(xpath=".//*[@id='lid']")
public WebElement email;

@FindBy(xpath=".//*[@id='pwd']")
public WebElement password;

@FindBy(xpath="//*[@id='signin_submit']")
public WebElement signin;

public void doLogin(String username,String userpassword)
{
    try {
        Thread.sleep(3000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }

    email.sendKeys(username);
    password.sendKeys(userpassword);
    signin.click();
}

}

Answer 1

You have two options:

1- You can use implicity wait while initializing the driver.

driver.manage().timeouts().implicitlyWait(20, TimeUnit.SECONDS);

2- Use explicty wait for the username field only:

WebDriverWait wait = new WebDriverWait(driver,30);
WebElement element = wait.until(
                    ExpectedConditions.visibilityOf(By.id(identifier)));