Harsha Smith

Ranch Hand
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since Jul 18, 2011
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Recent posts by Harsha Smith

is it for those with knowledge of Java(any version) or for absolute beginners in java or for anyone ? What is it inside the book that makes it special or a must read?
6 years ago
only when size is greater than 1 comparision is done between elements. see how it works in treeset class thats present in src.zip in your jdk folder.
is anything being added to logData list?
6 years ago


But doesn't meet client's requirements of matching 2 blank lines, useDelimiter, hasNext()
6 years ago
regex to match blank line is

6 years ago
6 years ago

Threre a lot of good books out there like Java How to Program/Big Java/Head First Java etc. Read the reviews at amazon.com and pick the one that suits your level.
6 years ago
It does throw Class cast exception when more than one object is added to the set.
The method declaration is wrong

You cannot create object of a method

Java is not math. use '==' to check equality of primitives. '=' is an assignment operator. ax should be written as a*x

you cannot invoke methods on primitives.

Please read first few chapters of any good java book and you'll get to know how to fix the problem.

6 years ago
main method "throws Exception" clause wasn't printed,I guess.
declare a variables something like



now keep on calculating the sum while sum less than Math.E. something like this



Add a static method factorial that takes double as argument and returns double. use recursion to get factorial of a number

6 years ago

I perfectly understand as ConcurrentModificationException is thrown when a thread iterating over it AND modifying it.



using enhanced for loop...you are iterating through the collection and by calling poll(), you are modifying it. And yes priority queue is a collection


A is wrong because the overriding method must not throw new or broader checked exceptions.

E is wrong because you are reducing the visibility of the method.


B is correct because FileNotFoundException is the sub class of IO Exception(Narrow Exception)
C is correct because the overriding method may throw a fewer or no exceptions
D is correct because you aren't messing with the visibility of the method
F is correct for obvious reasons.

Additionally 'G' is also correct if exists. something like

G. void think() throws RunTimeException
And no duplicate objects are created if one already exists. saves memory.
6 years ago
As told by others, there is no synchronization. so the following code may help you


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