how to use jdk for java projects in eclipse?


I install jre and jdk, then install Eclipse, I want to create new java project and run it with jdk. For another program I need rename jkd on jskd, in tip JRE in eclipse I can't choose jsdk, how to change this?

It's really difficult to understand what you are asking but it you want to select a JDK in eclipse:

Window -> Preferences -> Java -> Installed JREs -> Add -> Check your JDK