It is possible to show a Tooltip on a disabled Control? I have the following code and this doesn’t work: Has anyone a solution for that problem? Thx Answer The answer is no. Currently you cannot show a tooltip on disabled Node, for the simple reason that disabled Nodes do not receive any MouseEvents. Yo…
How to load public certificate from pem file?
I was trying to extract RES public key from the file below Here is the code i did.. But It throws out java.security.InvalidKeyException: IOException: ObjectIdentifier() — data isn’t an object ID What’s the appropriate way to extract RES Public key from a file.. Answer An X.509 certificate an…
How to make PrintWriter overwrite old file
I’m working on a project where I need to print some data to a file. During debugging phase, I would like to overwrite the old textfile so that I don’t have to delete the old file just to see the result of some changes that I’ve made in the code. Currently, the new output data is either added…
Is there a way to make empty packages visible in Eclipse?
Is there a way in Eclipse, to see empty parent packages? I have an issue freely viewing/accessing package new.galaxywar.client.resources.images.game that only contains 2 sub-packages: I tried creating that package again, because I thought that i might not have it in my eclipse project, but it won’t let …
How do I make a delay in Java?
I am trying to do something in Java and I need something to wait / delay for an amount of seconds in a while loop. I want to build a step sequencer. How do I make a delay in Java? Answer If you want to pause then use java.util.concurrent.TimeUnit: To sleep for one second or To sleep for a minute.
JSON object from java ObjectName.toString
I have a java object witch generates this output when i type objectName.toString() : Is there a JSON parser that lets me make a JSON from the string that my object generates? something like: JsonObject x = new JsonObject(busObject.toString()) It is important for me to generate it from the string that i get wh…
in java awt or swing, how can I arrange for keyboard input to go wherever the mouse is?
Working on a help system, I’d like each component to offer some help when the the mouse is over it and the “?” key is pressed. Sort of like tooltips, except with much more extensive help – essentially a little web browser is intended to pop up and display text, images or more. What I&#…
Efficient solution to codingBat riddle starOut in Java
The problem I am talking about is this Problem statment: Return a version of the given string, where for every star () in the string the star and the chars immediately to its left and right are gone. So “abcd” yields “ad” and “ab**cd” also yields “ad”. starOut(&…
Accumulator Generator test – Java 8
Paul Graham, in his great article Revenge of the Nerds, claimed that languages vary in power. He mentioned a nice exercise – writing an accumulator generator: We want to write a function that generates accumulators– a function that takes a number n, and returns a function that takes another number…
Declaring a retrofit REST endpoint with constant query value
So I want to get the metadata of a youtube video (say this one: https://www.youtube.com/watch?v=qlTA3rnpgzU). I’m going to encode it and wrap it in another url like so: http://www.youtube.com/oembed?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DqlTA3rnpgzU&format=json My interface definition will …