What it does: if set to "true", any cached data used by the OSGi framework and eclipse runtime will be wiped clean. This will clean the caches used to store bundle dependency resolution and eclipse extension registry data. Using this option will
eclipse报An error has occurred,See error log for more details. java.lang.NullPointerException错误,解决办法: 在"开始"-->"运行"---->"cmd"进入命令提示行后,再进入eclipse安装目录的eclipse文件夹, 然后输入eclipse -clean即可