Eclipse ide tasks tag problem

I have been puzzled by the problem for several days: the task tags(TODO FIXME XXX and etc.) disappeared in tasks view in my working java project. What strange is this problem did not occur if a create a new project. 开发者_如何学CPerhaps that's because I changed some configuration of my working project, but I can not figure out what it is,-_-!

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The task tags are under:

Window > Preferences

And then under:

Java > Compiler > Task Tags

Also you can check up in the top right corner there is a link for:

`Configure Project Specific Settings`

I think that's where you want to be

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Java Task Tags are only detected when a Build occurs (other than Clean), so leave automatic builds on if you want to get the most out of them.