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cieling and floor

 
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MyEclipse IDE Spring Java
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In Line 9
cielingKey() : Returns the least key greater than or equal to the given key, or null if there is no such key.
but there is no key which is >= "eight", shouldn't it be null ?


In Line 11
floorKey)() : Returns the greatest key less than or equal to the given key, or null if there is no such key.
all keys are <="eight" , among them "six" is greatest, shouldn't it be "six" ?


 
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Try to print the Keys for String objects in the TreeMap declared (e.g "one" ). You would be clearer about the methods used and that would help you to get the answer to your question.
 
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