The order in which the JRE is sought in Eclipse is: The JRE specified by the VM parameter---the JRE in the >elipse directory---> The default JRE in the operating system, and this feature can also be used to resolve cases where multiple JRE is installed on the native.
After the eclipse is started, some file directories are created.
1. The. Metadata directory is created, and the directory has a personalized profile that holds the workspace for the project being built, and if the. Metadata directory is deleted, then many MyProjects project information will be lost, and all projects need to be imported manually.
The 2.configuration directory will create some plug-in cache directories, and some of the configuration information of Eclipse itself (such as a set workspace path). The configuration directory can be arbitrarily deleted in addition to the Config.ini file. Eclipse will be created again when it starts.
Some basic knowledge about eclipse