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shift operators

 
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Could any one kindly explain about all shift(<<, >>, >>>) operators with examples or let me know the site where i can find more examples on shift operators. I am preparing for SCJP.
After reading about shift operators i am not able to answer this question.
Q.which of the following expressions results in a positive value in x?
A.int x = -1; x = x >>>5;
B.int x = -1; x = x >>> 32;
C.byte x = -1; x = x >>> 5;
D.int x = -1; x = x >> 5;

Thanks.
 
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Go to the link below for some shift operator exmaples & explanation
http://www.javaprepare.com/notes/operator.html

Originally posted by suresh kamsa:
Could any one kindly explain about all shift(<<, >>, >>>) operators with examples or let me know the site where i can find more examples on shift operators. I am preparing for SCJP.
After reading about shift operators i am not able to answer this question.
Q.which of the following expressions results in a positive value in x?
A.int x = -1; x = x >>>5;
B.int x = -1; x = x >>> 32;
C.byte x = -1; x = x >>> 5;
D.int x = -1; x = x >> 5;

Thanks.


 
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Hi Suresh
here's one I found handy
http://www.jchq.net/tutorial/BitShift.htm
rgds Jim
 
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Originally posted by suresh kamsa:
Could any one kindly explain about all shift(<<, >>, >>>) operators with examples or let me know the site where i can find more examples on shift operators. I am preparing for SCJP.
After reading about shift operators i am not able to answer this question.
Q.which of the following expressions results in a positive value in x?
A.int x = -1; x = x >>>5;
B.int x = -1; x = x >>> 32;
C.byte x = -1; x = x >>> 5;
D.int x = -1; x = x >> 5;

Thanks.


Answer A will result in positive value of x. But c will give compiler error. Because x>>>5 will result in int value. Which we are trying to assign to byte. If we do casting that is x=(byte)x>>>5 will result in negative answer. But instead of declaring x as byte, we declare as int we get positive value of x.
In case of >>> operator, negative value of x always result in Positive value.
For further detail refer java specification.Hope it is of some help. Even am preparing for Certification. If anybody else can clear the ideas what I have, it will be of great help
Thanks
Arathi Rajashekar
 
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My personnal favorite is Cat and Mouse Game with Bits campfire story.
 
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