How to click on elements in iframe using Selenium web driver

import java.util.List;

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.firefox.FirefoxProfile;
import org.openqa.selenium.firefox.internal.ProfilesIni;


public class iframeTest {
    public static void main(String[] args) throws InterruptedException {

        ProfilesIni allProfiles = new ProfilesIni();
        FirefoxProfile myProfile = allProfiles.getProfile("MyTestProfile");
        myProfile.setPreference("capability.policy.default.Window.frameElement.get","allAccess");
        WebDriver myTestDriver = new FirefoxDriver(myProfile);
        myTestDriver.manage().window().maximize();

        myTestDriver.get("http://tinyurl.com/cb3lbho");
        Thread.sleep(5000L);

        try {
            List<WebElement> AlliFrameID = myTestDriver.findElements(By.tagName("iframe"));
            System.out.println(AlliFrameID.size());
            for(int i=0;i<=AlliFrameID.size();i++){
                System.out.println(AlliFrameID.get(i).getAttribute("id"));
            }
        } catch (Exception e) {

            myTestDriver.switchTo().frame("ifrm");

            myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[2]/input")).click();

            System.out.println(myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[1]/input")).getAttribute("value"));

            myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[3]/input")).click();
            System.out.println(myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[1]/input")).getAttribute("value"));

            myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[3]/input")).click();
            System.out.println(myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[1]/input")).getAttribute("value"));

            myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[3]/input")).click();
            System.out.println(myTestDriver.findElement(By.xpath("//*[@id='ifrmTest']/p[1]/input")).getAttribute("value"));

            myTestDriver.switchTo().defaultContent();
            myTestDriver.findElement(By.xpath("//*[@id='testForm']/p/input[1]")).sendKeys("Online selenium Training");

            myTestDriver.findElement(By.xpath("//*[@id='testForm']/p/input[2]")).click();
        }

    }

}