how to specify nested generics in eclipse

Question

I want to specify this type:

Map<String,Map<String,String>> blah = null;

But Eclipse refuses this. I am not sure if it is Eclipse or the Java parser.

I had similar issues when trying to write my own java parser at study times: ">>" was regarded as the shift operator.

What's going on here?

Edit: java works for this.

Why not actually specify what happens instead "Eclipse refuses this". If I paste that code in my eclipse, I see no problems. — Nanne
– Nanne, Commented Mar 23, 2011 at 11:09

svrist · Accepted Answer · 2011-03-23 11:14:46Z

1

It could be because your eclipse is set up to use a compiler version for java 1.4 which doesn't have generics.

Does it work if you just do

Map<String,String> map = null;

EDIT: Setting in eclipse enter image description here

answered Mar 23, 2011 at 11:14

svrist

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the_dark_destructor · Accepted Answer · 2011-03-23 11:20:48Z

0

No problem for me as expexted...

Indeed you can for sure define nested generic like you was doing

Map<String,Map<String,String>> blah = null;

Event doing this will not cause problems

Map<String,Map<String,Map<String,String>>> blah = null;

It is not a problem of nested generic (Java support this feature), it is a problem of generic support. Be sure to have the right settings for your compiler in Eclipse, you have to set at least java 1.5 for enabling generics. (Windows->Preferences->Java-Compiler and then check the version).

answered Mar 23, 2011 at 11:20

the_dark_destructor

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