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Tag: java

Remove trailing comma from comma-separated string

I got String from the database which have multiple commas (,) . I want to remove the last comma but I can’t really find a simple way of doing it. What I have: kushalhs, mayurvm, narendrabz, What I want: kushalhs, mayurvm, narendrabz Answer To remove the “, ” part which is immediately followe…

How to generate exceptions from RepaintManager

In connection with my question (may be), I found another exception type that I not able to catch and print-out from SwingWorker thread. How can I to generate RepaintManager exceptions? I read this CheckThreadViolationRepaintManager and this approach by Alexander Potochkin, but nothing seems to solve my issues…

Unparseable date exception in java

These lines of codes causees this exception what is the possible solution ? Answer Your format is completely wrong. Not only are you using mm (which means minutes) when you probably meant MM, but this: is clearly not in the format You probably want something like EDIT: That works for me in desktop Java: You m…

How to connect via HTTPS using Jsoup?

It’s working fine over HTTP, but when I try and use an HTTPS source it throws the following exception: Here’s the relevant code: Answer If you want to do it the right way, and/or you need to deal with only one site, then you basically need to grab the SSL certificate of the website in question and…

Bit twiddling for Java or Scala programmers

Does anyone know of good tutorials or even a good book to master bit-level operations? I mean it’s almost clear what every operation does (in Java for instance) or where to find the right documentation, but I’m very new to this topic and I wonder how things like: work (copied from HashMap). I can&…

Trim String in Java while preserve full word

I need to trim a String in java so that: The quick brown fox jumps over the laz dog. becomes The quick brown… In the example above, I’m trimming to 12 characters. If I just use substring I would get: The quick br… I already have a method for doing this using substring, but I wanted to know w…

java @SafeVarargs why do private methods need to be final

I have a private method in an inner class which is private I would like to use the SafeVarargs annotation. However, I am required to either have a static or final method. Why does a private method need to be final as well? Isn’t this redundant? Answer It is redundant, and you bring up an excellent point…