Java Tutorial

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

Oracle cloud provide an always free service for virtual machine, database and network creation & usage. It is a very good news because of free usage. This article will tell you how to register oracle always free cloud account and how to create virtual machine instance in it, it also tell you how to setup …

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How To Install / Uninstall Multiple Java Versions In Mac OS By Home Brew Or Manually

This article will tell you how to install / uninstall multiple java versions on mac os both use home brew or manually. It also show you how to set JAVA_HOME & PATH system environment variable to make your installed jdk as the default jdk. We recommend you to use home brew, because it provide a …

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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 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 i …

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How To Enable Group Policy Editor ( gpedit.msc ) In Win 10 Home Edition

Group policy editor (gpedit.msc) is a very useful windows function that are needed when enable windows long file path feature. It has been installed and enabled in win 10 professional and enterprise edition by default. But when you run it in win 10 home edition, it will prompt error message like Windows cannot find ‘gpedit.msc’, …

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How To Create, Debug Java Project In Visual Studio Code

Visual studio code is an open source lightweight code editor provided by Microsoft. It is not a heavyweight IDE, it is just a platform and startup very quickly. But it can support any coding languages develop and debugging through it’s extension. And there are so many extensions in visual studio code marketplace. And as time …

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