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FilenameFilter Interface

 
Greenhorn
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this piece of code is from whizlabs 5.0, i want to know if the real exam requires knowledge of the FilenameFilter Interface or the listFiles method in the File class? i've noticed quite a few questions in whizlabs that require knowledge not talked about in the K.S book, should i waste time studying them or has the K.S book covered everything i need to know for the exam? please advice thanks

 
Ranch Hand
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Well i simply adapted the appraoch of reading whatever additional is coming my way.
 
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