When I use eclipse PyDev to develop a python program, I need to import the python pandas library with the command import pandas as pd. But when I run the python source code in the eclipse PyDev project, it displays the below error messages in the eclipse console. This article will tell you how to …
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 …
How To Fix Issue Eclipse Maven Dependencies Jar Files Grayed Out Read More »
Recently I installed some eclipse plugins and after that my eclipse is crashed. When I restart the eclipse again, it shows a popup dialog with the error message An error has occurred. See the log file C:\Users\zhaosong\eclipse-workspace\.metadata\.log. This article will tell you how to fix this error.
When I create a java Maven project in eclipse, I meet a could not calculate build plan error. The detailed error message is displayed below. After some investigation, I finally find the method to solve this error.
When I install android SDK use android SDK manager, it throws an error exception in thread “main” java.lang.noclassdeffounderror: javax/xml/bind/annotation/xmlschema . It cost me a lot of time to investigate. Now I will tell you how to fix it in detail.
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 …
This article will tell you how to install/uninstall multiple java versions on mac os both use homebrew or manually. It also shows you how to set JAVA_HOME & PATH system environment variable to make your installed JDK the default JDK. We recommend you use homebrew because it provides a lot of easy-to-use tools.
Scala is based on java virtual machines, so if you want to learn scala programming, you need first install JDK, then install scala. This article will tell you how to install JDK and scala on both Ubuntu Linux, Windows, and macOS.
Apache James is a popular open-source mail server. It supports both SMTP, POP3, and IMAP protocols. This article will tell you how to install Apache James both on Windows and Linux, how to create a user account on it, and how to use the free email client tool Thunderbird to connect to it to send …
How To Connect Localhost Apache James With Thunderbird Read More »
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 …
Resolve Spring Boot JPA Table ‘dbname.hibernate_sequence’ Doesn’t Exist Error Read More »
