问题描述：
In Package Explorer I right-clicked on project and selected "Open in New Window". New Eclipse window was opened with that project. Then I closed old, "main" Eclipse window, so only new "project" window remained. Now each time I launch Eclipse I have this "project" window with project name in window title and Package Explorer drilled down into this project. And I need to press "Up" button in Package Explorer to see all my projects. How can I restore default behaviour and launch Eclipse with workspace scope and not project? Thanks.
问题解决：
My original answer: Once you get the Package Explorer the way you want it, if you exit Eclipse cleanly it should come back that way.
My revised answer: It looks like a bug, even if you exit cleanly it comes back inside of the project. And in fact when you create a new window no matter what it puts you into the project. Even if you switch to the project explorer.
I found a way to fix it though, do a Window -> Close All Perspectives, then open the Java perspective and exit and come back in and you should be OK. I have filed this bug about it.