How to handle alerts in selenium webdriver

//How to handle  alerts inselenium webdriver 

package com.snapdeal;

import java.util.concurrent.TimeUnit;
import org.openqa.selenium.Alert;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;

public class AlertTest {
    public static void main(String[] args) {
        WebDriver driver = new FirefoxDriver();
        driver.get("http://www.kesinenitravels.com/CheckFareDetails.aspx");
        driver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
        driver.findElement(By.id("ctl00_cpEndUserMain_ibtnSearch")).click();
        // Handling alert OK
        Alert alert = driver.switchTo().alert();
        System.out.println(alert.getText());
        alert.accept();
        driver.close();
    }
}



/*
Output is





Select Source


*/