Randy Hernandez

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since Nov 03, 2011
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Recent posts by Randy Hernandez

Congratulations Keith!

85% is a great score. You should try the OCWCD.

Do you know a good book for Android Development?
12 years ago
Hi again Shivdhwaj Pandey

Many roads lead to the Java SE 6 Programmer Certification. It all depends on your way of learning, the money and the time you have to spend to study for the exam. For me, the best way (and the fastest) is to buy a good book (K&B for example), however, there are heaps of fantastic resources available on google (search for java mock exams).

Also, make sure you know the objectives of the exam (from the oracle site) and cover them all, this is very important.

Finally, practice a lot and do not hesitate to ask a question in the Java forums if you don’t understand something.
Hi shivdhwaj.

I don't think you can go for a 1.4 SCJP certification. Currently you can try for a 1.5 or 1.6 (Also called 5.0 and 6.0) certification.

You can obtain further information on the Oracle Web Site: Oracle Certified Professional Java Programmer
Hi Faisal Fuad

String objects are immutable, it means that:

String str = "text";

is equivalent to:

char data[] = {'t', 'e', 'x', 't'};

and you can't change it. The reason String objects are immutable is related to the String constant pool, it makes Java more memory efficient when two references points to the same String. In my opinion StringBuilder is a whole different story, it acts as a buffer with a fixed capacity, once that buffer overflows, it is automatically made larger.

Both are useful , Strings for normal character manipulation and StringBuilder for file I/O streams or large blocks of changing characters.

Cheers
beepath