CODE EXAMPLE FOR JAVA

how can i press a key using action class i java ?

package automationFramework;

import static org.junit.Assert.assertEquals;

import org.openqa.selenium.By;
import org.openqa.selenium.Keys;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.chrome.ChromeDriver;

public class KeyboardEvents {

	public static void main(String[] args) {
		
        // Initialize ChromeDriver
	// Here we assume that the ChromeDriver path has been set in the System Global variables
        WebDriver driver=new ChromeDriver();
       
        //Navigate to the demo site
        driver.get("https://demoqa.com/text-box");
       
        // Enter the Full Name
        WebElement fullName = driver.findElement(By.id("userName"));
        fullName.sendKeys("Mr.Peter Haynes");
        
        //Enter the Email
        WebElement email=driver.findElement(By.id("userEmail"));
        email.sendKeys("PeterHaynes@toolsqa.com");
        
        // Enter the Current Address
        WebElement currentAddress=driver.findElement(By.id("currentAddress"));
        currentAddress.sendKeys("43 School Lane London EC71 9GO");
        
        // Copy the Current Address
        currentAddress.sendKeys(Keys.CONTROL);
        currentAddress.sendKeys("A");
        currentAddress.sendKeys(Keys.CONTROL);
        currentAddress.sendKeys("C");
        
        //Press the TAB Key to Switch Focus to Permanent Address
        currentAddress.sendKeys(Keys.TAB);
        
        //Paste the Address in the Permanent Address field
        WebElement permanentAddress=driver.findElement(By.id("permanentAddress"));
        permanentAddress.sendKeys(Keys.CONTROL);
        permanentAddress.sendKeys("V");
        
        //Compare Text of current Address and Permanent Address
        assertEquals(currentAddress.getAttribute("value"),permanentAddress.getAttribute("value"));
        
        driver.close();

	}
}