Every time I try to create a copyright profile in IntelliJ (or PyCharm), I find myself googling around the web trying to find out how to get the month name, e.g. August, into the template. Unfortunately, the IntelliJ documentation is not very helpful by just saying:
25 years of Java – Happy Birthday!
Today 25 years ago Java made its first public appearance. Back then, Java promised to be a general-purpose programming language that you “write once, run anywhere“. It came with a new and unique way to compile Java source code down to bytecode, an intermediate representation that could be understood, compiled at runtime and run by the Java Virtual Machine (JVM). It was the combination of Java bytecode and the JVM that made it possible for Java to keep that “write once, run anywhere” promise. The Java Virtual Machine was for Java programs exactly what the name suggests, a (virtual) machine. Regardless of which computer you had, which OS you were running, if you had a JVM installed, you could run your compiled Java program on it without the need for porting or recompiling the program first.
Oracle Database client libraries for Java now on Maven Central
Oracle has published its Oracle Database JDBC client libraries on Maven Central. From now on you can find Oracle Database related jar files under the
com.oracle.database group id. You will find all libraries from version 220.127.116.11 (e.g. ojdbc6) to 19.3.0 (e.g. ojdbc10).
Going forward, Oracle will use Maven Central as one of the primary distribution mechanisms for Oracle Database Java client libraries, meaning that you will also be able to find new versions of these libraries on Maven Central in the future.
To get the latest Oracle Database JDBC driver, use the following dependency GAV in your Maven POM file:
<dependency> <groupId>com.oracle.database.jdbc</groupId> <artifactId>ojdbc10</artifactId> <version>18.104.22.168</version> </dependency>
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Manually installing a Maven artifact in your local repository
I find myself once again in the situation that I have to install the Oracle JDBC driver into my local Maven repository. Usually this is easily accomplished via
mvn install:install-file -Dfile=<path-to-file> -DgroupId=<group-id> -DartifactId=<artifact-id> -Dversion=<version> -Dpackaging=<packaging>, see Guide to installing 3rd party JARs for more details on that. However, this time I was thinking to go the extra mile and actually figure out a way of how to do it entirely manually. This comes in handy if you have, for example, Maven integrated in your IDE and the
mvn binary not available to yourself in the command line.
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Java class finding tool: ClassFinder
I got into more coding again lately and that is a good thing I think. I’m a believer of the German saying “Wer rastet, der rostet” or in English: A rolling stone gathers no moss! Java seems to be my main programming language since quite a while now. But believe it or not I’m still coding some PL/SQL as well now and then. Anyway, sometimes when you get some ClassNotFound exceptions in Java it can be quite handy to have a little tool that can scan .jar and .zip files for the class that you’re missing. Yes, there are tons of those little programs out there on the web but as you might have guessed by the title I’ve decided to write yet another class finding tool. Damn, I really should have called it YACFT! But instead I did go for ClassFinder. Why did I write yet another class finding tool then? Well, although there are some good ones out there, non of them fulfilled all of my requirements – at least none of those that I have found. First I was a big fan of Xigole’s classfinder tool. A really slick, fast and easy to use command-line class finding tool which is really great for Unix systems where you ssh in. However, I soon got fed up with it when I did have a proper graphical interface available, whether it was Windows or X11 or simply my MacBook Pro. So I started searching for other tools and soon found that they were either just GUI based or just GUI based and on Windows only (Why? I don’t get it!) or GUI based on ugly AWT. But all that I wanted was a slick tool like Xigole’s that was clever enough to spawn a GUI when there was X11 available but still provide a nice CLI when there wasn’t. Well, as I said I couldn’t find one, so I wrote my own and here it is, ClassFinder:
It’s really easy to use:
- Give it either a file or a folder to search – files currently supported are .jar, .war, .ear, .zip, .rar, .class, .java
- Give it the class name that you’re looking for
- Shall the class name be case sensitive?
- Shall the folder be searched recursively?
- Hit Search!