Eclipse cannot load main class

This article may be helpful if you have tried online those methods that are still wrong:

Install JRE, JDK in different folder

Change Classpath

CMD run java-version and Javac-version show the same version

Today, when you write Java code, click the green arrow in the menu bar and prompt in the console

Error: Unable to load main class

Blink of an instant, before the operation is good (right-click the project, run as application), how can not now

and take out the separate Java files, go to cmd under Javac, Java Run, or not

Then Baidu, learned that severed Java file package a packet, then to CMD run, you must follow the following steps:

First of all

Javac Javaname.java

Post-CD. Go back to the previous level directory and

java packagename.javaname

如此运行后发现成功，纳闷，再返回eclipse还是无法加载主类

Finally found that I do not know what year and month my run by default is not the current Java file, but another deleted Java

Click Run configuration (running config)

In the Out of the dialog box appears not this file, delete it as empty, apply can

Eclipse cannot load main class