Java Tutorial

How To Fix Issue Eclipse Maven Dependencies Jar Files Grayed Out

I add a dependency in my eclipse maven project pom.xml file, and when I save the project, eclipse downloads all the dependency required jar files under the eclipse project —> Maven Dependencies folder. But when expand the Maven Dependencies folder I found all the dependency required jar files are grayed out. And the class in …

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How To Create Virtual Machine Instance And Install ShadowSocks Server On Oracle Always Free Cloud

Oracle Cloud provides an always-free service for virtual machines, databases, and network creation & usage. It is very good news because of free usage. This article will tell you how to register an oracle always free cloud account and how to create virtual machine instances in it, it also tells you how to set up …

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Resolve Spring Boot JPA Table ‘dbname.hibernate_sequence’ Doesn’t Exist Error

In my recent spring boot example project, I use spring boot data JPA to operate the MySQL server table. And when I invoke the CrudRepository‘s save method to implement insert action to the table, it shows below error, the error message is “table ‘dev2qa_example.hibernate_sequence’ doesn’t exist”. This error cost me some time to fix, and …

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