I have added JOptionPane to my application but I do not know how to change background color to white? Answer By using the UIManager class or
data from sqlite into ArrayList
i am using code this blog to have a draggable list. This tutorial is using a custom DragNDropAdapter that takes the content as an ArrayList. In my listActivity i query a table with returned column name.It has 11 values inserted. i tried to convert it to ArrayList from String[] with many ways such as : or what…
Regex to match words of a certain length
I would like to know the regex to match words such that the words have a maximum length. for eg, if a word is of maximum 10 characters in length, I would like the regex to match, but if the length exceeds 10, then the regex should not match. I tried but that brings me matches only if the minimum
What sort of configuration issues or problems might make Maven Assembly plugin go slowly?
Our multi-module Maven project used to take 4-6 minutes to build. Over the past few months, it has increased to 20+ minutes per build. One symptom is that sometimes the build appears to pause until I hit <enter>. However, the Maven build still runs fine (6 minutes, no pauses) on our build server. The bu…
Does using an Iterator over a TreeMap in Java interfere with the order of keys?
I want to know that if using an Iterator over a TreeMap in Java interfere with the order of keys? Answer From http://docs.oracle.com/javase/6/docs/api/java/util/TreeMap.html#keySet() : Returns a Set view of the keys contained in this map. The set’s iterator returns the keys in ascending order. If for so…
Convert LocalDate to LocalDateTime or java.sql.Timestamp
I am using JodaTime 1.6.2. I have a LocalDate that I need to convert to either a (Joda) LocalDateTime, or a java.sqlTimestamp for ormapping. The reason for this is I have figured out how to convert between a LocalDateTime and a java.sql.Timestamp: So, if I can just convert between LocalDate and LocalDateTime,…
Eclipse shows strange [DEBUG], I want to disable it
As per the below Code, I am getting every single details of the program as debug, which I want to get rid of. If is taking too much time when running the Application. How can I get those [DEBUG] disabled? Answer I am getting every single details of the program as debug, which I want to get rid of. ORMLite
org.apache.commons.fileupload.disk.DiskFileItem is not created properly?
I am trying to use the code shown in the following example: java.lang.NullPointerException while creating DiskFileItem My Test method contains the following code: The text file exists in this location but the last line in the above code does not output the file content. Any idea why? N.B. The following does p…
Java recursive Fibonacci sequence
Please explain this simple code: I’m confused with the last line especially because if n = 5 for example, then fibonacci(4) + fibonacci(3) would be called and so on but I don’t understand how this algorithm calculates the value at index 5 by this method. Please explain with a lot of detail! Answer…
How do I move my JMenuBar to the screen menu bar on Mac OS X?
When I move my JMenuBar to the screen menu bar on Mac OS X, it leaves some blank space where the menu would be in my window; I need to remove that space. I am using to move my JMenuBar to the screen menu bar. My friend who uses a Mac reports that this leaves some ugly vertical space where