I’m wondering what the best way to fix precision errors is in Java. As you can see in the following example, there are precision errors: The result displayed is: loop value: 11 20.789999 loop value: 22 41.579998 loop value: 44 83.159996 loop value: 88 166.31999 loop value: 176 332.63998 loop value: 352 …
Select top 1 result using JPA
I need to bring from DB only one single result. How can I do that with JPA? I tried “select t from table t” but didn’t work. Any other ideas? Answer Try like this It should work UPDATE* You can also try like this
Eclipse – passing VM parameter to every test in the project
I need to pass a VM parameter to every test that is run in the project. Setting this manually doesn’t seem to be the most convenient solution, so is there any possibility to pass the parameter to every test automatically. Thank you for help. Answer We change the JRE Configuration in Eclipse (Preferences…
XML to Java Object
I am trying to convert an XML file to a Java Object, now, I have read of JAXB, XStream, Sax and DOM, I’d like to convert this sort of type of xml: it might be as well as: I wanted to know if there is anything out there (and possibly not 3rd party) that I can use, without declaring a
Minecraft javascript error
I am trying to make a script that draws a circle for minecraft using singleplayer commands. For starting, I tried to do the basics; here is my code: But when I run it, it says: Failed to execute: The choice of Java constructor setY matching JavaScript argument types (string) is ambiguous; candidate constructo…
When are ALL the cases when the onSaveInstanceState() method called?
All the sources I read have all mentioned couple of cases and concluded with “a few other cases”. What are ALL the cases when the onSaveInstanceState method called in a View/Activity?
First occurrence in a binary search
I’m tinkering with some code and I realized something I never knew. A normal binary search will return a random index in a data set for a key that occurs more than once. How can I modify this code below to return the first occurrence? Is this something people do? Answer Having found a matching value, yo…
Easiest way to convert a Blob into a byte array
what is the easiest way to convert a Blob into a byte array?I am using MYSQL and i want to convert a Blob datatype into a byte array. Iam using java programming language:)
Strip Leading and Trailing Spaces From Java String
Is there a convenience method to strip any leading or trailing spaces from a Java String? Something like: Result: myString.replace(” “,””) would replace the space between keep and this. Answer You can try the trim() method. Take a look at javadocs
How would I create a JFreeChart scatterplot best fit line
I have an arraylist of points I want to include in a JFreeChart scatterplot. That works fine, but I now want a best fit line on it. After some searching, JFreeChart doesn’t support such calculations directly, so what I want to do is calculate it myself and then stick a line into the chart manually. How …