great help needed !!

[Ashok Paulraj]

Hello every1,
I didn't find sufficient information in K & B to answer this question. I would appreciate if you ranchers would provide me with some links on topics required to answer these kind of conversions/questions.
Any help is appreciated !!!
~ Shalini

class EBH025 {
public static void main (String args[]) {
int i1 = 0xffffffff, i2 = i1 << 33;
int i3 = i1 << (33 & 0x1f);
System.out.print(Integer.toHexString(i2) + ",");
System.out.print(Integer.toHexString(i3));
}}

[Corey McGlone]

So what's your question?

[Ashok Paulraj]

I need some links on hex/oct/binary representations of numbers and the operations that can be carried out on them. Also, how to interpret UNICODE numbers into their respective integer formats.
I just blink on questions where some conversions are required from UNICODE to integer representation.
~ Shalini

[sanjana narayanan]

Hi Taurean,
Even I was not comfortable, when i encountered such problems.These are the things you can do.
1. Go to Dan's website/marcus website(one of these has info about base conversions).
2. You can make a search for shiftoperators in this forum and i am sure you would get a lot of info
3. You can go to google.com and search on hexadecimal converison.
-sanjana

[Bert Bates]

Taurean -
did you check out the reply on this thread?
https://coderanch.com/t/244419/java-programmer-SCJP/certification/octal-hex-binary-unicode
If so, what's next? What part of these topics is clear to you, and where do you start getting confused?
Bert
[ January 19, 2004: Message edited by: Bert Bates ]

[Ashok Paulraj]

Hello Bert & others,
I could understand the logic of shift operators and the 2's complement. But what I find difficult is,
1) working on long nos. w.r.t shifts in some of the mock exams
2) frequent conversions that u need to make to get the working a little simple than expected.
In the below question, it requires to have conversion to hexadecimal and work out in a different manner. Does SCJP1.4 exam test our knowledge on shift operators with simple/medium level questions or difficult ones requiring good knowledge on conversions and experience working with long representations too !!!......
for eg::
class EBH021 {
public static void main(String[] args) {
System.out.print((-1 & 0x1f) + "," + (8 << -1));
}}

[Bert Bates]

Hi Taurean,
Shifting by a negative number is NOT covered on the exam, so if you and Dan want to discuss that as a "research project" go for it!
But for all you SCJP candidate readers, you won't have shift things by a negative amount on the exam!
Taurean - is the rest of the question clear?
Bert