In package explorer whenever i open any class file from any project package explorer closed automatically. And to open it again i have to go
Window -> Show View -> Package Explorer
I also try
Window -> Reset Perspective
but its also not work. If it happens only once or twice i do not have any problem to reopen it. But on Opening every class its disappear and reopen it each time very hard. Anyone know how to solve this problem?
I've just change my workspace location to other drive and its work fine now.