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If you are building your Java project using Maven, maybe in Eclipse or from the command prompt by running mvn install and your build is failing with an error like "invalid target release: 1.7" or "invalid target release: 1.8" then you have come to the right place. In this article, I'll show you the reason why this error occurs and how you can deal with these errors even with higher Java version like Java 9, 10 installed on your machine, or maybe with Java 11 in the coming month. The root cause of the problem is that you have specified a higher Java version in your pom.xml file for Maven compiler plugin then what Maven knows in your system, and that's why it's saying invalid target release. A simple solution to this problem is either reduce your target version in pom.xml or install a new Java version if you want to build your project in higher version But, the key to solving this problem is knowing that Maven picks the Java version from the JAVA_HOME...

Hello guys, 100% full disk space is a common problem and as a programmer or Linux user, you often need to free disk space by deleting biggest files and directories. In order to do that, you need to know some Linux find command examples to list and delete some biggest files and directories and that's what you will learn in this tutorial. As a Java developer, you also need to also support your application, most of which mostly run on Linux machines. Though production is monitored by the dedicated support teams and they receive regular alerts on the status of file system space, they often come running to you or the developer responsible about what to do when disk space is almost full or reaching 100%. This is even more common on UAT and QA/TEST environment where no one really monitors and then people start coming screaming to you that things are not working, Java processes are not up and systems are not able to connect to each other, only to find that there is no space left in the mac...

Recently I face an strange issue while using Maven in Eclipse via M2Eclipse plugin. I have created a Maven Java project in Eclipse and subsequently tried to add Spring framework as dependency, to my surprise, nothing was happening. Eclipse was not able to search dependency in Maven central repository . I was surprised because I have never faced this issue while I was using M2Eclipse plugin from long time. After some trial and error, I realized that this is my brand new workspace and I am running with Eclipse Luna, newest version of Eclipse which I had just downloaded couple days of back. My first hunch was that Eclipse might not able to connect to Internet, and to verify that I tried connecting Eclipse market place, and boom it was working fine. Then I quickly checked Maven settings in Eclipse and found that the option which is required to download and build the index was not turned on. The check box was unchecked there. To give you some background about how Eclipse search dependency o...