Exception in thread "main" java.net.UnknownHostException

I am trying to download a file from a website using HtmlUnit 2.11. However , I am getting UnknownHostException . Below is the code and the complete stack trace:

Code:

final WebClient webClient = new WebClient(
                BrowserVersion.INTERNET_EXPLORER_8);

        URL Url = new URL("https://340bopais.hrsa.gov/reports");

        HtmlPage page = webClient.getPage(Url);
        HtmlSubmitInput button = page
                .getElementByName("ContentPlaceHolder1_lnkCEDailyReport");

        final HtmlPage page2 = button.click();

Exception Trace:

Exception in thread "main" java.net.UnknownHostException: 340bopais.hrsa.gov
    at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
    at java.net.InetAddress$1.lookupAllHostAddr(Unknown Source)
    at java.net.InetAddress.getAddressesFromNameService(Unknown Source)
    at java.net.InetAddress.getAllByName0(Unknown Source)
    at java.net.InetAddress.getAllByName(Unknown Source)
    at java.net.InetAddress.getAllByName(Unknown Source)
    at org.apache.http.impl.conn.SystemDefaultDnsResolver.resolve(SystemDefaultDnsResolver.java:45)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.resolveHostname(DefaultClientConnectionOperator.java:278)
    at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:162)
    at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
    at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
    at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
    at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
    at com.gargoylesoftware.htmlunit.HttpWebConnection.getResponse(HttpWebConnection.java:171)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseFromWebConnection(WebClient.java:1484)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponse(WebClient.java:1402)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:304)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:373)
    at src.main.java.DataDownloader.main(DataDownloader.java:30)

Solution

PING (the Packet Internet Groper) is an ICMP (Internet Control Management Protocol) protocol.

HTTPS is a Transport protocol.

Many network providers and service managers restrict access to their resources for only the necessary protocols and ports.

It is quite likely that the organisation that hosts 340bopais.hrsa.gov has configured firewalls and other network infrastructure to only permit TCP traffic on port 80 and 443 to their server.

Update:

I successfully, downloaded the file using java, and selenium. I made the whole code into a repository and you can download my code. But here i explain it to you how to work with it:

Use your Eclipse to make a maven project
Add a folder called driver into the resource folder
Download this chrome.exe driver, and put it into the driver folder.

Add this dependency into your pom.xml:

    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>selenium-java</artifactId>
        <version>3.4.0</version>
    </dependency>

Into the main method type:

public static void main(String[] args) {

        File file = new 
                       File(StackApplication.class.getClassLoader().getResource("driver/chromedriver.exe").getFile());
            String driverPath=file.getAbsolutePath();
            System.out.println("Webdriver is in path: "+driverPath);
            System.setProperty("webdriver.chrome.driver",driverPath);

            WebDriver driver=new ChromeDriver();
            driver.navigate().to("https://340bopais.hrsa.gov/reports");
            driver.findElement(By.xpath("//*[@id=\"headingTwo\"]/h4/a")).click();
            driver.findElement(By.xpath("//*[@id=\"ContentPlaceHolder1_lnkCEDailyReport\"]")).click();



    }

And it works like a charm