I’m working on a Java Swing-based application+ Hibernate+Mysql+Spring. When I test CRUD operations, I don’t have problems with read, but in insert statements system shows the message: I have the last version of MySQl Hibernate 4 Java annotations Can you tell me which is the problem to solve now? A…
Tag: java
How do you remove the first Node in a Linked List?
Sup guys so I’m going over a few of my methods in my Linked List class and I’m getting a logical error when removing a node from a linked list. I was working on my removeFirst() method when I then encountered a error in my removeLast() method as well. The problem is that both remove the last item …
Does Java’s new keyword necessarily denote heap allocation?
I’m trying to write something fast, and that constantly allocates and deallocates memory, making where this memory is allocated important in terms of performance. Does allocating objects always allocate them to the heap? Does JIT compilation do fancy allocation optimization of any sort? Answer Objects a…
java heap size error dex2jar android decompile solution?
i was working on a android project but my laptop was formatted so i lost all code but i had a signed apk of the file on my phone .. whenever i try to use dex2jar it stops converting mid way with this error. how can i increase the heap size or is there another way out. can i decompile
How to put/get multiple JSONObjects to JSONArray?
Is it possible to store multiple different JSONObjects into a single JSONArray? This is the structure, I want to store in a JSONArray. Here’s the code where I am setting JSONObject and putting it into a JSONArray Using this code only the last value, which I am setting in JSON object Override to all obje…
Calculating timezone from GMT value – Android
In a android form , i am accepting a GMT value(offset) from user such a +5:30 , +3:00. and from this value , i want to calculate the timeZone that is “India/Delhi”. Any ideas on how to do it ……Plzz Answer If you already have a specific instant in time at which that offset is valid, you…
BCrypt.checkpw() Invalid salt version exception
I’m trying to implement authentication using BCrypt, in my Play 2.1. Java application, but I’m getting Invalid salt version exception when I’m trying to authenticate the user. This is my stack trace I’m using following maven repository: http://mvnrepository.com/artifact/org.mindrot/jbc…
Microsoft ISA Server Authentication in Android
I have an application in Android, in which I were reading files from the remote server, code for reading file is given below; Now all the remote files are behind proxy (Microsoft ISA Server) which required authentication to access the files. Please guide me how I can pass authentication parameters from androi…
UML Squence Diagram – visualize validation of data
A method performs successively validation checks with some passed data. If a validation check fails, a exception will be immediately thrown and the method aborted. How can visualize this flow with UML sequence diagrams? Is it possible / allowed to show exceptions in sequence diagrams? A possible solution perh…
Java: Get week number from any date?
I have a small program that displays the current week from todays date, like this: And then a JLabel that displays the week number: So right now I’d like to have a JTextField where you can enter a date and the JLabel will update with the week number of that date. I’m really not sure how to do this…