Selenium Ebay Script - selenium

Question

I have logged into Ebay and want to click the hyperlink of 'My collections' which is under "G'day [username]". The issue is now I can not find the element of 'My collections'. The error message is "Unable to locate element: (//li[#id='gh-ucol']/a)
Please refer to the below steps how I replicate:
Open Ebay via Firefox
Click Log in hyperlink
Enter the user name password then click log in button
Click "G'day [username]"
Select 'My Collection' from the droplist
This is my Selenium Java Script:
import org.openqa.selenium.By;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class KevinTest {
public static void main(String[] args) throws InterruptedException{
WebDriver driver = new FirefoxDriver();
driver.get("http://www.ebay.com.au");
driver.manage().window().maximize();
Thread.sleep(20);
driver.findElement(By.linkText("Sign in")).click();
Thread.sleep(100);
driver.findElement(By.xpath("(//input[#placeholder='Email or username'])[2]")).sendKeys("my#username");
driver.findElement(By.xpath("(//input[#placeholder='Password'])[1]")).sendKeys("mypassword");
driver.findElement(By.id("sgnBt")).click();
boolean tf;
try {
driver.findElement(By.id("errf")).getText();
tf = true;
}catch(NoSuchElementException e) {
tf = false;
}
if (tf == true) {
System.out.println("Incorrect Password");
driver.close();
}else {
System.out.println("Log in successfully");
}
driver.findElement(By.id("gh-eb-u")).click();
Thread.sleep(100);
driver.findElement(By.xpath("(//*[#id='gh-ucol']/a)")).click();
}}

Answer 1

Its a good practice to use implicit wait after initiating the driver.
WebDriver driver = new FirefoxDriver();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
Use the below id for the 'Click "G'day [username]'.
driver.findElement(By.id("gh-ug")).click();
Use the below xpath for collection.
driver.findElement(By.id("//*[#id="gh-ucol"]/a")).click();
Since we have used implicit wait you can remove all other thread.sleeps. Hope this helps. Thanks.