In Eclipse IDE, if your program is consuming a lot of memory (loading big data) like this : List<Domain> list = domainBo.findAllDomain(100000); for(Domain domain : list){ process(domain.getDomainName()); } It can easily hit java.lang.OutOfMemoryEr
eclipse Java compiler level does not match the version of the installed Java project facet. CreateTime--2018年4月24日10:28:43 Author:Marydon 1.情景再现 2.选中项目-->右键-->Build Path-->Configure Build Path: 3.Java Build Path-->选中"JRE System Library&