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How do I check if a file exists in Java?

The only similar question on SO deals with writing the file and was thus answered using FileWriter which is obviously not applicable here. ...
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Where to get “UTF-8” string literal in Java?

... In Java 1.7+, java.nio.charset.StandardCharsets defines constants for Charset including UTF_8. import java.nio.charset.StandardCharsets; ... StandardCharsets.UTF_8.name(); For Android: minSdk 19 ...
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Is there a unique Android device ID?

Do Android devices have a unique ID, and if so, what is a simple way to access it using Java? 52 Answers ...
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How to store arbitrary data for some HTML tags

...n example: links which send an AJAX request to get the content of articles and then display that data in a div. Obviously in this example, I need each link to store an extra bit of information: the id of the article. The way I've been handling it in case was to put that information in the href link ...
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Get an element by index in jQuery

I have an unordered list and the index of an li tag in that list. I have to get the li element by using that index and change its background color. Is this possible without looping the entire list? I mean, is there any method that could achieve this functionality? ...
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PHP Timestamp into DateTime

... Note that new DateTime('@' . $timestamp) and $dt = new DateTime(); $dt->setTimestamp($timestamp) don't deal with timezones the same way. See my answer @ stackoverflow.com/questions/12038558/… for more details. – John Slegers ...
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What port is a given program using? [closed]

... netstat -b -a lists the ports in use and gives you the executable that's using each one. I believe you need to be in the administrator group to do this, and I don't know what security implications there are on Vista. I usually add -n as well to make it a little...
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How do you enable the escape key close functionality in a Twitter Bootstrap modal?

...ions for the Twitter Bootstrap modal on their main documentation page and used the data-keyboard="true" syntax mentioned but the escape key does not close the modal window. Is there something else I'm missing? ...
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How can I calculate the time between 2 Dates in typescript

...the getTime method to get the time in total milliseconds since 1970-01-01, and subtract those: var time = new Date().getTime() - new Date("2013-02-20T12:01:04.753Z").getTime(); share | improve thi...
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Can I hide the HTML5 number input’s spin box?

...s the spin-button for webkit browsers (have tested it in Chrome 7.0.517.44 and Safari Version 5.0.2 (6533.18.5)): input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { /* display: none; <- Crashes Chrome on hover */ -webkit-appearance: none; margin: 0; /* <-...