Hi there I’m new to GUIs in Java and was trying to make a splash screen or an image appear for 3 seconds. Then after that it it will go onto my main program. Does anyone have an ideas how to do this or can link me to any tutorials? So far I have done this but not sure where
hasPrevious() Method not working
I don’t understand why my hasPrevious iterator is not functioning, it looks like this: I have another function using hasNext() and it works, but this one will not. I am not sure if this method is no longer in existence or not, but when I look into it, Java websites speak of it. I don’t understand …
How to use blueimp jQuery file upload: Empty file upload result in Struts 2, fileitems are empty
I am using Blueimp and server side is Java, Struts2. I couldn’t find examples using Java, anyway I managed to use the sample code, but I am getting “Empty file upload result” when I am trying to upload a single file also. The HTML part is the same, I am not pasting here as it may go lengthy.…
How to pass two objects to use in a form using thymeleaf?
My problem is the following : I’ve 2 differents objects that I’ve to fill from a single form. With 1 object, I simply do in the newFoo.html: and in the FooController: Let’s say I’ve an other object bar with a “status” variable in it. How can I do to pass that object so I ca…
Read Image Metadata from single file with Java
I want to read image metadata from a single file. I tried the following code: http://johnbokma.com/java/obtaining-image-metadata.html When I run it, I get build successful but nothing happens. Please help 🙂 Answer You haven’t specified the path to the file correctly. The change below should indicate thi…
Using BufferedReader to read Text File
I’m having problems with using the BufferedReader I want to print the 6 lines of a text file: Now from what I can gather every time I call the readLine() method it automatically advances to the next line. So I can’t use the condition br.readLine() != null since it’ll already advance it one l…
How do I print a double value without scientific notation using Java?
I want to print a double value in Java without exponential form. It shows this E notation: 1.2345678E7. I want it to print it like this: 12345678 What is the best way to prevent this? Answer You could use printf() with %f: This will print dexp: 12345678.000000. If you don’t want the fractional part, use…
Thread Safe singleton class
I wrote a below Singleton class. I am not sure whether this is thread safe singleton class or not? Can anyone help me with this? Any thoughts on my above Singleton class will be of great help. Updated Code:- I am trying to incorporate Bohemian suggestion in my code. Here is the updated code, I got- Can anyone…
Can the OS stop a Java process from garbage collecting?
I’m monitoring a production system with AppDynamics and we just had the system slow to a crawl and almost freeze up. Just prior to this event, AppDynamics is showing all GC activity (minor and major alike) flatline for several minutes…and then come back to life. Even during periods of ultra low lo…
How to paginate a JPA Query
I have a submission table with columns like ID, Name, Code among other properties. My requirement is to search for records based on the mentioned properties and return a paginated set. This is the pseudocode for what I am looking for: There seem to be many options like CriteriaBuilder, NamedQuery, etc. Which …