How can I open a JavaFX Maven project from scratch in IntelliJ IDEA? As there is no difference between a Java project and a JavaFx project, I want to open a dedicated JavaFX project (Selection JavaFX from create project Wizard) with Maven module included. Answer Although dated I’m answering this because…
Tag: java
How to inject property value using @Value into static fields
I have one property file config.properties which is configured using spring property placeholder. This is how it’s configured in my spring configuration file: Now I need to set its value to static field using @Value annotation. How can I achieve this? Answer The only way is to use setter for this value …
How JDBC Statement.setFetchsize exactly works
I want to implement this methods functionality in my custom JDBC driver. Which method from JDBC should I use to setMaxResults? If my query results is 1000 rows and I have set the value for setFetchSize=100, then what will be the results? It will return only 100 row or after returning first 100 it will get nex…
Getting Mats from frames in a gif using OpenCV and Java
I am trying to get frames from a gif using OpenCV. I found Convert each animated GIF frame to a separate BufferedImage and used the second suggestion. I modified it slightly to return an array of Mats instead of BufferedImages. I tried two methods to get bufferedImages from the gif. Each presented different p…
Initialize List<List> in Java
How can I initialize List<List<Integer>> in Java? I know List is an interface and I can use ArrayList or LinkedList to implement List<Integer> list = new ArrayList<Integer>(), but when I initialize List<List<Integer>> list = new ArrayList<ArrayList<Integer>>(); …
Differences between W, \W, [^a-zA-Z0-9_] in regular expression
I am trying to find all characters, which are not letters(upper/lowercase), numbers, and underscore, and remove it. However, the following code could not even compile in Java: If I use only “\W” rather than “W”, the above code turns out to be correct. So, what is the differences betwee…
java.lang.NoClassDefFoundError with Intellij And Maven
I am working with Maven 3.0.5 and Intellij 14.0.2 and Maven is not copying the required Jars in my project’s calsspath so I am copying it manually and trying to exccute the main class of my project it is throwing me following error: I know its very common and found a bunch of solutions at StackOverflow …
HP Fortify SQL injection issue on preparedStatement in java
I am using HP Fortify to measure code quality of my java code. HP Fortify is reporting SQL Injection error on so how to resolve this? Answer From my experience, HP Fortify will report an error on this scenario if it cannot trace the origin of all the Strings you are using to build your queryString to constant…
Automatically delegating all methods of a java class
Say I have a class with many of public methods: Now I would like to create a wrapper class which would delegate all the methods to wrapped instance (delegate): Now if MyClass has a lot of methods I would need to override each of them which is more or less the same code which just “delegates”. I wa…
Java 8 filter with method call
I am learning Java 8 lambda and streams and trying some examples. But facing problem with it. here is my code Am getting compilation error in .map addr(second argument) field. what wrong in it and could you please provide links to learn java 8 streams. FYI am following this link Java 8 lambda Answer The first…