I am learning Java as a hobby and currently using  j2sdk-1_4_2_05.
I note that Sun has made available a more recent version , namely JDK
1.5.0_01.
Here is my question.

   I have experience with other languages and want to start with Java,
because I've heard so many good things about it.
   Right out of the gates, I'm already lost.
   I went to java.sun.com and was confused by my many choices.  I read a

I've recently set up an older Mac running Linux (YDL 3.0.1) at home that
I want to use for some Java development. I've installed IBM's Blackdown
(1.4.2 SDK) rpm. I installed jikes (1.22) because, though javac works
fine, any speed benefit I can get on this will be helpful, and I ...

Hi to All and EveryOne,
If I dont write the [import java.util.LinkedList;] the compiler complains.
LinkedListTest.java:17: incompatible types
found   : LinkedList

This may be pretty elementary to some of you, but I've tried to do this
and can only get the remove to happen for one pair of duplicates.  Can
someone help me with what i'm doing wrong?
public void insertionSort()

I'm a begginner.  Please help.
I need to write some code that will convert eruos to dollars.  I was
hoping that someone could push me in the right direction.

How do I creat, on-the-fly, container for two objects a la C++
make_pair? Basically I want to store in a hashtable some object as Key,
and as a Value, I want to store 2 objects. I know I can make my own
wrapper class that encapsulates the two objects, but is there not a

I have a bst which contain words(Strings), what I'm trying to is do an
inorder traversal so as I can print the words in alphabetical order. The
system.out.println() prints them ok, but what I really want it to do is
return a LinkedQueue from my bst, but it only seems to add the ...

Hi gurus,
This clas is from a Bruce Eyckel.
How comes it can instantiate an abstract class?
It comples and run.

I use the following code to send email. I do not know to use the
default 25 for smtp port. How can I set a different number?
 public static void sendMail(
           String smtpServer,

How many threads can one application have at the same time in Java? Is
there a roof? Is it platform dependent, in that case, what is the number
for SUN's JVM on WIN32? Any info on this would help me.
What about green threads? they are out?

can someone please give me the answer to the following and an explanation of
why the declaration is illegal? I am having trouble with this concept....
Which of the following methods will be illegal in the subclass?
import java.io.*;

I'm trying to load a keystore under freebsd using the java version
1.4.2-p6, which was created with the java keytool under debian/woody
using Suns JDK 1.4.2_05.
The program throws a java.io.StreamCorruptedException under freebsd:

i've written a small program to output the number of arguments that
have been passed to it.  for example, if the program was called from
the command line with "java Test a a a", it'd output 3.  atleast that's
what i think it should be doing.  here's the program:

I tried the program below expecting an output like "To Phrase."
public class ToPhrase {
       public static void main(String[] args) {
               String s = "ToPhrase".replaceAll("(.)([A-Z])", "\1 \2");