On Mac OS X 10.9 signed Java Web Start applications are blocked by default with the message: I know it’s possible to weaken the security checks to allow any application to run, but that requires a manual intervention of the end user. Is it possible to “sign” a Java Web Start application such…
Tag: java
Use jsf as template engine on EAR
Thinking about html e-mails for our e-commerce site I thought about reusing jsf and other 3rd party libraries as a template engine to create the e-mails on our application server (Glassfish 3, EAR). Is it possible to manually run jsf with a local file and initialize the necessary bean to capture the html outp…
java.lang.ClassNotFoundException: org.apache.xmlbeans.XmlObject Error
I am getting following error Exception in thread “main” java.lang.NoClassDefFoundError: org/apache/xmlbeans/XmlObject at OrderBook.WriteToExcelSheet.CreateOutPutFile(WriteToExcelSheet.java:20) at OrderBook.MainMethod.main(MainMethod.java:71) I looked for the reasons for this error online but could…
Volatile variable explanation in Java docs
when a thread reads a volatile variable, it sees not just the latest change to the volatile, but also the side effects of the code that led up the change This is mentioned at http://docs.oracle.com/javase/tutorial/essential/concurrency/atomic.html Can someone please provide an example of this? This first gave…
How to exit a while loop after a certain time?
I have a while loop and I want it to exit after some time has elapsed. For example: Answer Thus the statement Checks if it has been 10 seconds or 10,000 milliseconds since the loop started. EDIT As @Julien pointed out, this may fail if your code block inside the while loop takes a lot of time.Thus using Execu…
Open CSV to export resultset to string type
I want to export the result set of the SQL query to a CSV file. I am using opencsv to export to CSV file. I am using below code to achieve it. But the problem I face is, it automatically exports to the datatype of the database column which is from resultset. Example: if I a column with datatype as
Java – Counting numbers in array
I’ve written a java prog that stores some values: which generate such output: 0:2 1:3 2:4 3:5 4:4 5:4 6:3 and now I need to count numbers in this output #1. Output #2 should be this: 1: 0 2: 1 3: 2 4: 3 5: 1 It means it counts ONE 2, TWO 3, THREE 4, and only One 5.
Alternating between even and odd elements in Array with GUI
I’m trying to work with more GUI stuff but I’m having problem with something. I have an array of JLabels. Each of them contain 1 number from 0 to 7. I’m making the numbers “light up” by changing …
Test Coverage: How to cover assertions?
EDIT: So It looks like JeffStorey link to the bug is correct. With assertions enabled the compiler will generate extra code. There ends up being 1 extra unreachable branch created. One of my methods constructor has these asserts I’m trying to cover it by doing this And again with values Board (-4 , 2) a…
How to pass an object from front-end to Struts 2
I am trying to send value of a field to Struts2 back-end through JavaScript but it returns NullpointerException. Once form is submitted the request will be sent to the following JavaScript method to be sent to back-end. the request will be created and sent as following But in back-end when I try to show the v…