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Remove plaintext \n from string in Java

I am using the wikimedia api to get content from wikipedia pages. The api returns a lot of "\n" as plain text. I want to remove them from a string
s = s.replaceAll("\\n", "");
s = s.replaceAll("\n", "");
Neither of these work, any ideas?

When your String contains a plaintext \n it is actually a \\n otherwise it would be displayed as a linebreak, which is why I found s = s.replaceAll("\\\\n","") to be working for me. An example snippet:
class Main{
public static void main(String[] args){
String s = "Hello\\nHello";
System.out.println(s);
s = s.replaceAll("\\\\n","");
System.out.println(s);
}
}
Remember that replaceAll takes a Regex: Since you want to replace 2 /s you have to escape both of them, therefore////

Hi Please to use below code format:
s= s.replace("\n", "").replace("\r", "");
Thanks

You can use the code below:
s = s.replace("\n", "");
but, the newline character can be different among the environments.
So, you can use this
s = s.replace(System.getProperty("line.separator"), "");

Newline character in bing translation text

This is a very basic question
I am using the Bing translate API method: Translate.execute(String to be translated,Target Language)
When there is no newline character in the source language then it is all fine. E.g.
String str = "I have seen some app. Educational and fun.";
But If my source text has multiple lines and looks like following, how do I create a String variable for it:
I have seen some app.
Educational and fun.
I don't want to add /n, /r characters inside my string because the bing API will try to translate these characters also.

Can you instead translate each sentence or line at a time and combine them after the fact?
String str1 = "I have seen some app.";
String str2 = "Educational and fun.";
String result = Translate.execute(str1) + "\n" + Translate.execute(str2);
Or translate it all at once and add the newlines characters in after you get the translation back? Maybe something like (may be too simplistic):
String str = "I have seen some app. Educational and fun.";
String result = Translate.execute(str);
result = result.replaceAll(".", "\n");

I can't get replace / replaceAll to work

I need to show data from database that supposed to be shown:
in the html: Behälter
in the browser: Behälter
but instead, I got data like this:
in the html: Behälter
in the browser: Behälter
So I need to change the & back to &. I use replaceAll and replace method from the Java's String class. But it didn't work. I even check whether the String has & or not using indexOf method, but it didn't even seems to catch or even see the & sign.
My code:
// supposed the value returned by the getObject function is "Behälter"
String text = (String)getObject("value");
if (text.indexOf("&") >= 0) text = "abc" + text;
text = text.replace("&", "&");
text = text.replaceAll("&", "&");
if (text.indexOf("&") >= 0) text = text + "def";
text = text + "xyz";
The result is
in the html: Behälterxyz
in the browser: Behälterxyz
Is there anything wrong with how I type and use replace / replaceAll? Thank you for the answer.

I would recommend using Apache Commons Lang for the StringEscapeUtils.unescapeHtml().
Feed it your string with the encoded characters, and it should spit it out decoded.

Javascript for extracting anchor text from anchor tag

need help in the following.
In javascript, need to pass a input
as eg:
str="<a href=www.google.com>Google</a>"; // this is for example actual input vary
// str is passed as parameter for javascript function
The output should retrieve as 'Google'.
I have regex in java and it is working fine in it.
String regex = "< a [ ^ > ] * > ( . * ? ) < / a > ";
Pattern p = Pattern.compile(regex, Pattern.DOTALL | Pattern.CASE_INSENSITIVE);
but in javascript it is not working.
how can I do this in Javascript. Can anyone provide me help for javascript implementation.

I dont think you would like to use Regex for this. You may try simply like this:-
<a id="myLink" href="http://www.google.com">Google</a>
var anchor = document.getElementById("myLink");
alert(anchor.getAttribute("href")); // Extract link
alert(anchor.innerHTML); // Extract Text
Sample DEMO
EDIT:-(As rightly commented by Patrick Evans)
var str = "<a href=www.google.com>Google</a>";
var str1 = document.createElement('str1');
str1.innerHTML = str;
alert(str1.textContent);
alert( str1.innerText);
Sample DEMO

Insert the HTML string into an element, and then just get the text ?
var str = "<a href=www.google.com>Google</a>";
var div = document.createElement('div');
div.innerHTML = str;
var txt = div.textContent ? div.textContent : div.innerText;
FIDDLE
In jQuery this would be :
var str = "<a href=www.google.com>Google</a>";
var txt = $(str).text();
FIDDLE

From the suggestions given by you all I got answer and works for me
function extractText(){
var anchText = "<a href=www.google.com>Google</a>";
var str1 = document.createElement('str1');
str1.innerHTML = anchText;
alert("hi "+str1.innerText);
return anc;
}
Thanks everyone for the support

Just going to take an initial stab at this, I can update this is you add more tests cases or details to your question:
\w+="<.*>(.*)</.*>"
This matches your provided example, in addition it doesn't matter if:
the variable name is different
the tag or contents of the tag wrapping the text are different
What will break this, specifically, is if there are angle brackets inside your html tag, which is possible.
Note: It is a much better idea to do this using html as other answers have attempted, I only answered this with a regex because that was what OP asked for. To OP, if you can do this without a regex, do that instead. You should not attempt to parse HTML with javascript when possible, and this regex is not comparable to a full html parser.

No need for a regex, just parse the string with DOMParser and get the element and then use the DOM object methods/attributes
var parser = new DOMParser();
var str='<a href='www.google.com'>Google</a>";
var dom = parser.parseFromString(str,"text/xml");
//From there use dom like you would use document
var atags = dom.getElementsByTagName("a");
console.log( atags[0].textContent );
//Or
var atag = dom.querySelector("a");
console.log( atag.textContent );
//Or
var atag = dom.childNodes[0];
console.log( atag.textContent );
Only catch is DOMParser is not supported in IE lower than 9.

Well, if you're using JQuery this should be an easy task.
I would just create an invisible div and render this anchor () on it. Afterwards you could simply select the anchor and get it's inner text.
$('body').append('<div id="invisibleDiv" style="display:none;"></div>'); //create a new invisible div
$('#invisibleDiv').html(str); //Include yours "str" content on the invisible DIV
console.log($('a', '#invisibleDiv').html()); //And this should output the text of any anchor inside that invisible DIV.
Remember, to do this way you must have JQuery loaded on your page.
EDIT: Use only if you've already have JQuery on your project, since as stated below, something simple as this should not be a reason for the inclusion of this entire library.

Assuming that you are using java, from the provided code.
I would recommend you to use JSoup to extract text inside anchor tag.
Here's a reason why. Using regular expressions to parse HTML: why not?
String html = "<a href='www.google.com'>Google</a>";
Document doc = Jsoup.parse(html);
Element link = doc.select("a").first();
String linkHref = link.attr("href"); // "www.google.com"
String linkText = link.text(); // "Google""
String linkOuterH = link.outerHtml();
// "<a href='www.google.com'>Google</a>";
String linkInnerH = link.html(); // "<b>example</b>"

Get URL from string with text

I have a bunch of strings like this:
Some text, bla-bla http://www.easypolls.net/poll.html?p=51e5a300e4b084575d8568bb#.UeWjBcCzaaA.twitter
And I need to parse this String to two:
Some text, bla-bla
http://www.easypolls.net/poll.html?p=51e5a300e4b084575d8568bb#.UeWjBcCzaaA.twitter
I need separate them, but, of course, it's enough to parse only URL.
Can you help me, how can I parse url from string like this.

By using split :
String str = "Some text, bla-bla http://www.easypolls.net/poll.html?p=51e5a300e4b084575d8568bb#.UeWjBcCzaaA.twitter";
String [] ar = str.split("http\\.*");
System.out.println(ar[0]);
System.out.println("http"+ar[1]);

This depends on how robust you want your parser to be. If you can reasonably expect every url to start with http://, then you can use
string.indexOf("http://");
This returns the index of the first character of the string you pass in (and -1 if the string does not appear).
Full code to return a substring with just the URL:
string.substring(string.indexOf("http://"));
Here's the documentation for Java's String class. Let this become your friend in programming! http://docs.oracle.com/javase/7/docs/api/java/lang/String.html

Try something like this:
String string = "sometext http://www.something.com";
String url = string.substring(string.indexOf("http"), string.length());
System.out.println(url);
or use split.

I know in PHP you'd be able to run the explode() (http://www.php.net/manual/en/function.explode.php) function. You'd choose which character you want to explode at. For instance, you could explode at "http://"
So running the code via PHP would look like:
$string = "Some text, bla-bla http://www.easypolls.net/poll.html?p=51e5a300e4b084575d8568bb#.UeWjBcCzaaA.twitter";
$pieces = explode("http://", $string);
echo $pieces[0]; // Would print "Some text, bla-bla"
echo $pieces[1]; // Would print "www.easypolls.net/poll.html?p=51e5a300e4b084575d8568bb#.UeWjBcCzaaA.twitter"