Java for Selenium Automation: Complete Tutorial (2026)

What you'll master: By the end of this Java for Selenium tutorial you will have a working Java 17 + Maven + TestNG + Selenium 4 setup, the OOP concepts you need to write clean test code, the collections and exception handling patterns every Selenium framework uses, and a production-grade Page Object Model with TestNG data providers and listeners.

Java has been the dominant language for Selenium since 2010. In 2026 it remains the most widely used, despite competition from Python and JavaScript. Here's why:

• Mature ecosystem — TestNG, JUnit, Maven, Gradle, Spring, Lombok
• Type safety — catches bugs at compile time that Python and JS miss
• Enterprise adoption — most enterprise QA jobs list Java
• Selenium Manager — Selenium 4 auto-resolves the right driver, no driver pain
• IDE support — IntelliJ IDEA is the gold standard for Java + Selenium

Choose Java if you're targeting enterprise roles, want maximum library support, prefer type safety, or your team already uses Java. Choose Python or TypeScript for greenfield projects or faster iteration.

For a deep comparison, see our Playwright vs Selenium guide and our Playwright complete guide.

🚀 Skip the boilerplate. Practise Java + Selenium rounds live with our AI mock interview, and review Selenium interview questions before your next round.

Install JDK 17 or 21

macOS:

brew install openjdk@17
echo 'export JAVA_HOME=$(/usr/libexec/java_home -v 17)' >> ~/.zshrc
echo 'export PATH=$JAVA_HOME/bin:$PATH' >> ~/.zshrc
source ~/.zshrc
java -version

Ubuntu/Debian:

sudo apt update
sudo apt install openjdk-17-jdk
export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
export PATH=$JAVA_HOME/bin:$PATH
java -version

Windows: download the JDK 17 MSI from Adoptium and set JAVA_HOME in System Environment Variables.

Install Maven

# macOS
brew install maven

# Ubuntu/Debian
sudo apt install maven

# Windows: download from maven.apache.org, extract, add bin/ to PATH

mvn -version

Download the Community Edition (free) from jetbrains.com/idea. Create a new Maven project (JDK 17, name selenium-java-demo), then edit pom.xml:

<project xmlns="http://maven.apache.org/POM/4.0.0">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.qa.selenium</groupId>
  <artifactId>selenium-java-demo</artifactId>
  <version>1.0.0</version>

  <properties>
    <maven.compiler.source>17</maven.compiler.source>
    <maven.compiler.target>17</maven.compiler.target>
    <selenium.version>4.25.0</selenium.version>
    <testng.version>7.10.2</testng.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.seleniumhq.selenium</groupId>
      <artifactId>selenium-java</artifactId>
      <version>${selenium.version}</version>
    </dependency>
    <dependency>
      <groupId>org.testng</groupId>
      <artifactId>testng</artifactId>
      <version>${testng.version}</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

Click Maven → Reload All Maven Projects. For more on Selenium 4 itself, see our Selenium WebDriver guide.

Variables, methods, and control flow

int retryCount = 3;
double timeout = 10.5;
boolean isHeadless = true;
String url = "https://example.com";
String[] browsers = {"chrome", "firefox", "edge"};

public String buildUrl(String host, String path) {
    return "https://" + host + path;
}

for (String browser : browsers) {
    System.out.println("Testing in " + browser);
}

try {
    driver.findElement(By.id("submit")).click();
} catch (NoSuchElementException e) {
    takeScreenshot("submit-not-found");
    throw e;
}

Strings (the most common test-data type)

String email = "admin@example.com";
boolean isValid = email.contains("@");
String domain = email.substring(email.indexOf("@") + 1);
String[] parts = "a,b,c".split(",");

The var keyword (Java 10+)

var driver = new ChromeDriver();
var wait = new WebDriverWait(driver, Duration.ofSeconds(10));

Use var for local variables when the type is obvious; skip it when the type adds clarity.

Classes and objects

public class LoginPage {
    private WebDriver driver;
    public LoginPage(WebDriver driver) { this.driver = driver; }
    public void login(String email, String password) {
        driver.findElement(By.id("email")).sendKeys(email);
        driver.findElement(By.id("password")).sendKeys(password);
        driver.findElement(By.id("submit")).click();
    }
}

Inheritance

public abstract class BasePage {
    protected WebDriver driver;
    protected WebDriverWait wait;
    public BasePage(WebDriver driver) {
        this.driver = driver;
        this.wait = new WebDriverWait(driver, Duration.ofSeconds(10));
    }
    public abstract boolean isLoaded();
}

public class LoginPage extends BasePage {
    public LoginPage(WebDriver driver) { super(driver); }
    @Override
    public boolean isLoaded() {
        return wait.until(ExpectedConditions.urlContains("/login")) != null;
    }
}

Polymorphism via interfaces

public interface Browser { WebDriver createDriver(); }
public class ChromeBrowser implements Browser {
    public WebDriver createDriver() { return new ChromeDriver(); }
}
public class FirefoxBrowser implements Browser {
    public WebDriver createDriver() { return new FirefoxDriver(); }
}

Abstract class = partial implementation (use for BasePage); interface = pure contract (use for Browser, Listener, Config).

// List — ordered, allows duplicates
List<WebElement> rows = driver.findElements(By.cssSelector("tr"));
int rowCount = rows.size();

// Map — key-value pairs
Map<String, String> credentials = new HashMap<>();
credentials.put("admin", "Sup3rSecret!");
String adminPassword = credentials.get("admin");

// Set — unique values, no order
Set<String> uniqueEmails = new HashSet<>();
uniqueEmails.add("a@example.com");

// Stream API
List<WebElement> enabledButtons = driver.findElements(By.tagName("button"))
    .stream()
    .filter(WebElement::isEnabled)
    .filter(WebElement::isDisplayed)
    .collect(Collectors.toList());

public void clickSafely(By locator) {
    try {
        wait.until(ExpectedConditions.elementToBeClickable(locator)).click();
    } catch (TimeoutException e) {
        takeScreenshot("click-timeout");
        throw new AssertionError("Element not clickable: " + locator, e);
    } catch (StaleElementReferenceException e) {
        // retry once
        wait.until(ExpectedConditions.elementToBeClickable(locator)).click();
    }
}

Custom exceptions for test code

public class LoginFailedException extends RuntimeException {
    public LoginFailedException(String message, Throwable cause) {
        super(message, cause);
    }
}

TestNG assertions throw AssertionError; don't wrap them in try/catch — let TestNG report the failure.

Screenshot helper

public class ScreenshotHelper {
    public static String takeScreenshot(WebDriver driver, String name) {
        var src = ((TakesScreenshot) driver).getScreenshotAs(OutputType.FILE);
        var dest = new File("screenshots/" + name + "_" + Instant.now().toEpochMilli() + ".png");
        dest.getParentFile().mkdirs();
        try { Files.copy(src.toPath(), dest.toPath()); }
        catch (IOException e) { throw new RuntimeException("Failed to save screenshot", e); }
        return dest.getAbsolutePath();
    }
}

src/test/resources/config.properties:

base.url=https://staging.example.com
admin.email=admin@example.com
admin.password=Sup3rSecret!
browser=chrome
timeout.seconds=10

public class Config {
    private final Properties props = new Properties();
    public Config() {
        try (var input = new FileInputStream("src/test/resources/config.properties")) {
            props.load(input);
        } catch (IOException e) { throw new RuntimeException("Failed to load config", e); }
    }
    public String get(String key) { return props.getProperty(key); }
    public int getInt(String key) { return Integer.parseInt(get(key)); }
}

Reading a JSON test-data file with Jackson

public class TestDataLoader {
    private final ObjectMapper mapper = new ObjectMapper();
    public List<TestData> loadUsers(String file) throws IOException {
        return mapper.readValue(
            new File("src/test/resources/" + file),
            mapper.getTypeFactory().constructCollectionType(List.class, TestData.class)
        );
    }
}

Use environment variables for secrets and properties files for non-sensitive config. For API-side test data patterns, see our API testing tutorial.

TestNG is the dominant Java test framework. JUnit 5 is the alternative; pick TestNG if you need data providers and listeners out of the box.

Annotations

public class LoginTest {
    @BeforeSuite public void beforeSuite() {}
    @BeforeClass public void beforeClass() {}
    @BeforeMethod public void beforeMethod() { driver = new ChromeDriver(); }

    @Test(priority = 1, groups = "smoke")
    public void loginValid() { /* ... */ }

    @Test(priority = 2, groups = "regression", dependsOnMethods = "loginValid")
    public void loginInvalid() { /* ... */ }

    @AfterMethod public void afterMethod() { if (driver != null) driver.quit(); }
}

Data providers (the killer feature)

@DataProvider(name = "userCredentials")
public Object[][] userCredentials() {
    return new Object[][] {
        {"admin@example.com", "Sup3rSecret!", "Welcome, admin"},
        {"viewer@example.com", "ViewerPass1!", "Welcome, viewer"},
    };
}

@Test(dataProvider = "userCredentials")
public void loginWithMultipleUsers(String email, String password, String expectedGreeting) {
    driver.get("https://example.com/login");
    driver.findElement(By.id("email")).sendKeys(email);
    driver.findElement(By.id("password")).sendKeys(password);
    driver.findElement(By.id("submit")).click();
    assertEquals(driver.findElement(By.tagName("h1")).getText(), expectedGreeting);
}

Listeners

public class ScreenshotListener implements ITestListener {
    @Override
    public void onTestFailure(ITestResult result) {
        var driver = (WebDriver) result.getTestContext().getAttribute("driver");
        if (driver != null) ScreenshotHelper.takeScreenshot(driver, result.getName());
    }
}

Parallel execution

<suite name="Suite" parallel="methods" thread-count="4">
  <test name="Regression">
    <classes>
      <class name="com.qa.selenium.LoginTest"/>
      <class name="com.qa.selenium.CheckoutTest"/>
    </classes>
  </test>
</suite>

Run with mvn test -DsuiteXmlFile=testng.xml.

Standard project structure

selenium-java-demo/
├── pom.xml
├── src/
│   ├── main/java/com/qa/selenium/
│   │   ├── pages/ (BasePage, LoginPage, DashboardPage)
│   │   └── utils/ (Config, ScreenshotHelper)
│   └── test/
│       ├── java/com/qa/selenium/ (LoginTest, CheckoutTest, listeners/)
│       └── resources/ (config.properties, testdata/users.json)

Profiles for different environments

<profiles>
  <profile>
    <id>staging</id>
    <properties>
      <env>staging</env>
      <base.url>https://staging.example.com</base.url>
    </properties>
  </profile>
</profiles>

Run with mvn test -Pstaging.

Surefire plugin (runs tests)

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-surefire-plugin</artifactId>
  <version>3.5.0</version>
  <configuration>
    <suiteXmlFiles><suiteXmlFile>testng.xml</suiteXmlFile></suiteXmlFiles>
    <parallel>methods</parallel>
    <threadCount>4</threadCount>
  </configuration>
</plugin>

Base page

public abstract class BasePage {
    protected final WebDriver driver;
    protected final WebDriverWait wait;
    public BasePage(WebDriver driver) {
        this.driver = driver;
        this.wait = new WebDriverWait(driver, Duration.ofSeconds(15));
        PageFactory.initElements(driver, this);
    }
    public abstract boolean isLoaded();
    public void waitForLoaded() { wait.until(d -> isLoaded()); }
}

Login page

public class LoginPage extends BasePage {
    @FindBy(id = "email") private WebElement emailField;
    @FindBy(id = "password") private WebElement passwordField;
    @FindBy(id = "submit") private WebElement submitButton;
    @FindBy(css = ".error-message") private WebElement errorMessage;

    public LoginPage(WebDriver driver) { super(driver); }

    @Override
    public boolean isLoaded() {
        return wait.until(ExpectedConditions.visibilityOf(emailField)) != null;
    }

    public DashboardPage loginAs(String email, String password) {
        emailField.clear(); emailField.sendKeys(email);
        passwordField.clear(); passwordField.sendKeys(password);
        submitButton.click();
        return new DashboardPage(driver);
    }

    public String getErrorMessage() { return errorMessage.getText(); }
}

Test that uses POM

public class LoginTest extends BaseTest {
    @Test
    public void loginFlow() {
        driver.get("https://example.com/login");
        var login = new LoginPage(driver);
        login.waitForLoaded();
        var dashboard = login.loginAs("admin@example.com", "Sup3rSecret!");
        assertTrue(dashboard.getWelcomeMessage().contains("Welcome"));
    }
}

For framework architecture, see our framework setup guide — the patterns map closely to Java.

Factory Pattern

public class PageFactory {
    public static <T extends BasePage> T create(Class<T> pageClass, WebDriver driver) {
        try {
            return pageClass.getDeclaredConstructor(WebDriver.class).newInstance(driver);
        } catch (Exception e) {
            throw new RuntimeException("Failed to create page: " + pageClass.getName(), e);
        }
    }
}

Builder Pattern (for complex test data)

public class UserBuilder {
    private String email = "default@example.com";
    private String password = "DefaultPass1!";
    private String role = "viewer";

    public UserBuilder withEmail(String email) { this.email = email; return this; }
    public UserBuilder withRole(String role) { this.role = role; return this; }
    public User build() { return new User(email, password, role); }
}

var admin = new UserBuilder().withEmail("admin@example.com").withRole("admin").build();

Strategy Pattern (cross-browser)

public interface DriverStrategy { WebDriver createDriver(); }

public class ChromeStrategy implements DriverStrategy {
    public WebDriver createDriver() {
        var options = new ChromeOptions();
        options.addArguments("--headless=new");
        return new ChromeDriver(options);
    }
}

Singleton + Decorator

Use Singleton sparingly — it makes testing harder. Prefer dependency injection. Decorator is useful for adding logging or retries to a WebDriver without modifying it.

Code style

• 4 spaces, not tabs; always use braces
• Use Lombok @Data/@Builder to reduce boilerplate
• Prefer composition over inheritance and immutability where possible
• Use Optional for nullable returns
• Use var for local variables when the type is obvious

Selenium-specific

• Use explicit waits — never Thread.sleep
• Use the Page Object Model for any non-trivial app
• Prefer accessibility IDs and relative locators (Selenium 4)
• Let Selenium Manager resolve drivers automatically
• Reset state between tests (cookies, localStorage, database)

Testing-specific

• Use TestNG data providers for data-driven testing
• Use TestNG listeners for cross-cutting concerns
• Use Maven profiles for environment-specific config
• Use Surefire's parallel mode for parallel execution

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Original SoftwareTestPilot research you can cite in reviews, RFCs, and interviews:

• TDD impact benchmarks (2026) — defect density, MTTD, PR test ratio.
• Test pyramid benchmarks (2026) — real 62 / 26 / 12 ratios and flake per layer.
• Shift-left benchmarks (2026) — DORA-style metrics and defect-fix cost.
• Enterprise automation tool benchmarks (2026) — flake vs licence cost.
• Selenium market benchmarks (2026) and Playwright market benchmarks (2026).