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doubt with for-each loop

 
Greenhorn
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The above program showing the compile time error..Can anyone tell me the exact reason for this..

Thanks

[Edit:added code tags-Ankit]
 
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The for-each loop requires that you provide it an Iterable and the Iterator interface doesn't extend that interface. From your reverse method you'll have to return List...
 
Ranch Hand
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Another option is to rewrite the loop like this:

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