I did a simple web socket communication with spring 4,STOMP and sock.js, following this https://github.com/rstoyanchev/spring-websocket-portfolio and this http://assets.spring.io/wp/WebSocketBlogPost.html well, I want to know if is possible capture connection events like when a new client was connected to my …
Tag: java
Sqlite4java on Raspberry Pi
I want to use my java project on Raspberry Pi. This code depends on sqlite4java which uses native implementations for many platforms including arm processors link. The problem is that java can’t load required sqlite wrapper for arm processor. I was doing the follows: Copied all version (tried one by one…
Convert a JSON String to a HashMap
I’m using Java, and I have a String which is JSON: Then my Map in Java: I want to store all the data from the JSONObject in that HashMap. Can anyone provide code for this? I want to use the org.json library. Answer In recursive way: Using Jackson library:
How whether a string is randomly generated or plausibly an English word?
I have a corpus of text which contains some strings. In these strings, some are English words, some are random such as VmsVKmGMY6eQE4eMI, there are no limit on the number of characters in each string. Is there any way to test whether or not one string is a English word? I am looking for some kind of algorithm…
Populating NumberPicker in custom made Dialog
I’m trying to populate a NumberPicker on a custom made dialog. At the moment I’m using a method which uses a View and inflates another layout (the dialog), the method should then populate the …
Difference between Java Optional and Scala Option
At the very end, this article introducing to new Java 8 Optional, states that Optional is not nearly as powerful as Option[T] in Scala (but at least it doesn’t allow wrapping null). The API is not as straightforward as null-handling and probably much slower. But the benefit of compile-time checking plus reada…
What is the difference between OCI and THIN driver connection with data source connection between java and oracle XE?
I’m writing the below codes for connection between the java and Oracle 10g XE using 3 way(OCI, THIN and data source), the code is running successfully but don’t know difference between the THIN and OCI with data source connection. 1- 2- 3- Answer Oracle provides four types of drivers for their dat…
program using hibernate does not terminate
I created a program using Hibernate. The program reaches the main function end, nevertheless the program is running. I wonder if it happens when SessionFactory is configured using Hibernate Version 4.x. Is the way to configure wrong? manual1_1_first_hibernate_apps.java Util.java The following console log snip…
LibGDX: Make all actors on a stage unchecked
I have a stage with multiple buttons on it that basically serves as a toolbox. I want the user to be able to select between the different items that are displayed; therefore when the user selects one item, all others have to be deselected. I thought of doing that with the checked property of libGDX buttons. H…
Min Average Two Slice Codility
A non-empty zero-indexed array A consisting of N integers is given. A pair of integers (P, Q), such that 0 ≤ P < Q < N, is called a slice of array A (notice that the slice contains at least two elements). The average of a slice (P, Q) is the sum of A[P] + A[P + 1] + …