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Htmlunit fill form with javascript

I want fill https://login.live.com/ form but I coult not. I don't want use Chromium Embeded Framework or java Selenium. Because they opening a browser. Is there a way do it without open browser?
I tried HtmlUnit but javascript problem occurred:
WebClient webClient = new WebClient(BrowserVersion.CHROME);
webClient.getOptions().setJavaScriptEnabled(true);
final HtmlPage page1 = webClient.getPage("https://login.live.com/en");
final HtmlForm form = (HtmlForm) page1.getElementById("i0281");
final HtmlTextInput textField = form.getInputByName("loginfmt");
textField.setValueAttribute("email");
Error message:
Exception in thread "main" com.gargoylesoftware.htmlunit.ElementNotFoundException: elementName=[input] attributeName=[name] attributeValue=[loginfmt]
at com.gargoylesoftware.htmlunit.html.HtmlForm.getInputByName(HtmlForm.java:572)
It is working html pages without javascript.
If you don't want code you can give me some hint. You can use this or you can google this framework ect...
Thank you

Open a web browser page after a POST request using Htmlunit library

I'm testing my website and what I do is moving inside of it using Htmlunit library and Java. Like this for example:
WebClient webClient = new WebClient(BrowserVersion.FIREFOX_45);
HtmlPage page1 = webClient.getPage(mypage);
// sent using POST
HtmlForm form = page1.getForms().get(0);
HtmlSubmitInput button = form.getInputByName("myButton");
HtmlPage page2 = button.click();
// I want to open page2 on a web browser and continue there using a function like
// continueOnBrowser(page2);
I filled a form programmatically using Htmlunit then I sent the form which uses a POST method. But I'd want to see the content of the response inside a web browser page. The fact is that if I use the URL to see the response it doesn't work since it's the response to a POST method.
It seems like it's the wrong approach to me, it's obvious that if you do anything programmatically you could not expect to open the browser and continue there... I can't figure out what could solve my problem.
Do you have any suggestions?

Login website with HtmlUnit

I am trying to login my University website, but I came across a problem with html unit.
My code :
WebClient webClient = new WebClient(BrowserVersion.INTERNET_EXPLORER_8);
webClient.setJavaScriptEnabled(false);
webClient.setThrowExceptionOnScriptError(false);
HtmlPage currentPage = webClient.getPage("http://www.oid.hacettepe.edu.tr/cgi-bin/menuindex.cgi");
HtmlForm form = currentPage.getForms().get(0); // forms correct
System.out.println(form.asXml());
HtmlTextInput name = form.getInputByName("login");
HtmlPasswordInput pass = form.getInputByName("passwd");
name.setValueAttribute("*****");
pass.setValueAttribute("*****");
HtmlSubmitInput button = form.getInputByName("SubmitName");
HtmlPage page2 = button.click();
System.out.println(page2.asText());
Result :
Exception in thread "main" com.gargoylesoftware.htmlunit.ElementNotFoundException: elementName=[input] attributeName=[name] attributeValue=[login]
at com.gargoylesoftware.htmlunit.html.HtmlForm.getInputByName(HtmlForm.java:460)
at hacettepe.Hacettepe.main(Hacettepe.java:34)
Java Result: 1
Can you explain what is wrong with my thinking on this problem ? Thanks a lot.

Because the element 'login' was not found on the page.

Just like user2115021 suggested, as a first step verify that the elements you are looking for are actually in the first page that you requested. In particular, make sure that "login", "psswd" and "SubmitName" are actual values within the "currentPage".
If that doesn't work, try changing the way you get the name of the form. I've used
final HtmlForm form = page.getFormByName("loginform");
before without any trouble. getForms() might return multiple forms and you would need to be sure that you're looking at the correct form.

HtmlUnit, how to post form without clicking submit button?

I know that in HtmlUnit i can fireEvent submit on form and it will be posted. But what If I disabled javascript and would like to post a form using some built in function?
I've checked the javadoc and haven't found any way to do this. It is strange that there is no such function in HtmlForm...
I read the javadoc and tutorial on htmlunit page and I Know that i can use getInputByName() and click it. BuT sometimes there are forms that don't have submit type button
or even there is such button but without name attribute.
I am asking for help in such situation, this is why i am using fireEvent but it does not always work.

You can use a 'temporary' submit button:
WebClient client = new WebClient();
HtmlPage page = client.getPage("http://stackoverflow.com");
// create a submit button - it doesn't work with 'input'
HtmlElement button = page.createElement("button");
button.setAttribute("type", "submit");
// append the button to the form
HtmlElement form = ...;
form.appendChild(button);
// submit the form
page = button.click();

WebRequest requestSettings = new WebRequest(new URL("http://localhost:8080/TestBox"), HttpMethod.POST);
// Then we set the request parameters
requestSettings.setRequestParameters(Collections.singletonList(new NameValuePair(InopticsNfcBoxPage.MESSAGE, Utils.marshalXml(inoptics, "UTF-8"))));
// Finally, we can get the page
HtmlPage page = webClient.getPage(requestSettings);

final HtmlSubmitInput button = form.getInputByName("submitbutton");
final HtmlPage page2 = button.click()
From the htmlunit doc
#Test
public void submittingForm() throws Exception {
final WebClient webClient = new WebClient();
// Get the first page
final HtmlPage page1 = webClient.getPage("http://some_url");
// Get the form that we are dealing with and within that form,
// find the submit button and the field that we want to change.
final HtmlForm form = page1.getFormByName("myform");
final HtmlSubmitInput button = form.getInputByName("submitbutton");
final HtmlTextInput textField = form.getInputByName("userid");
// Change the value of the text field
textField.setValueAttribute("root");
// Now submit the form by clicking the button and get back the second page.
final HtmlPage page2 = button.click();
webClient.closeAllWindows();
}

How about getting use of built-in javascript support? Just fire submit event on that form:
HtmlForm form = page.getForms().get(0);
form.fireEvent(Event.TYPE_SUBMIT);
The code supposes you want to submit first form on the site.
And if the submit forwards you to another site, just link the response to the page variable:
HtmlForm form = page.getForms().get(0);
page = (HtmlPage) form.fireEvent(Event.TYPE_SUBMIT).getNewPage();

Although this question has good and working answers none of them seems to emulate the acutal user behaviour quite well.
Think about it: What does a human do when there's no button to click? Simple, you hit enter (return). And that's just how it works in HtmlUnit:
// assuming page holds your current HtmlPage
HtmlForm form = page.getFormByName("yourFormName");
HtmlTextInput input = form.getInputByName("yourTextInputName");
// type something in
input.type("here goes the input");
// now hit enter and get the new page
page = (HtmlPage) input.type('\n');
Note that input.type("\n"); is not the same as input.type('\n');!
This works when you have disabled javascript exection and when there's no submit button available.
IMHO you should first think of how you want to submit the form. What scenario is it that you want to test? A user hitting return might be a different case that clicking some button (that might have some onClick). And submitting the form via JavaScript might be another test case.
When you figured that out pick the appropriate way of submitting your form from the other answers (and this one of course).

How to programmatically access web page in java

There is a web page from which I want to retrieve a certain string. In order to do so, I need to login, click some buttons, fill a text box, click another button - and then the string appears.
How can I write a java program to do that automatically? Are there any useful libraries for that purpose?
Thanks

Try HtmlUnit
HtmlUnit is a "GUI-Less browser for
Java programs". It models HTML
documents and provides an API that
allows you to invoke pages, fill out
forms, click links, etc... just like
you do in your "normal" browser.
Example code for submiting form:
#Test
public void submittingForm() throws Exception {
final WebClient webClient = new WebClient();
// Get the first page
final HtmlPage page1 = webClient.getPage("http://some_url");
// Get the form that we are dealing with and within that form,
// find the submit button and the field that we want to change.
final HtmlForm form = page1.getFormByName("myform");
final HtmlSubmitInput button = form.getInputByName("submitbutton");
final HtmlTextInput textField = form.getInputByName("userid");
// Change the value of the text field
textField.setValueAttribute("root");
// Now submit the form by clicking the button and get back the second page.
final HtmlPage page2 = button.click();
webClient.closeAllWindows();
}
For more details check:
http://htmlunit.sourceforge.net/gettingStarted.html

The super simple way to do this is using HtmlUnit here:
http://htmlunit.sourceforge.net/
and what you want to do can be as simple as:
#Test
public void homePage() throws Exception {
final WebClient webClient = new WebClient();
final HtmlPage page = webClient.getPage("http://htmlunit.sourceforge.net");
assertEquals("HtmlUnit - Welcome to HtmlUnit", page.getTitleText());
}

Take a look at the apache HttpClient project, or if you need to run Javascript on the page, try HttpUnit.

Well when you press a button usually you do a request via a HTTP POST method, so you should use HttpClient to handle request and HtmlParser to handle the response page with the string you need.

Yes:
java.net.URL#openConnection() will allow you to make http requests and get the http responses
Apache HttpComponents is a library that makes it easier to work with HTTP.