I cannot figure out how to delete an entry from a Map(HashMap). For
example, suppose I have a class Person and 3 objects of that
type(personA, personB and personC):
public class Person {

Hi guys! I've finished reading Beginning Programming with Java For
Dummies today and I still want to learn more about java. What books
would you guys suggest that I read next?
I'm planning on reading "Just Java" by by Peter van der Linden and

i've a method takes an  argument and  returns a value, the above
method will do some operations which is time consuming, so the caller
is blocked till the processing is finished.
Now i want to make it as asynchronous. one way of doing this is

Hello, if I have a string A, how I can see the string's unicode?  say,
display the String with format: "\u611F\u5192";
Currently I have a string A, which I don't know the encoding, but if I
display that string in the firefox browser, it is just some strange

I am looking for some free utilities for Java, that supports other languages
then English
(I need utilities that support Hebrew).
1. Database (Is My-Sql good enough).

So, some large company has a firewall and proxy server and IHS and
Websphere and a J2EE web app. This web app produces an HTML email
containing a hidden <img ...> tag that requests an image from the web
app (not the web server). This email is sent out to many people.

So that I can use String[] mystring.split("regexp") in Java, can
someone give me the regular expression to split this string:
(0, 0.0.0.0-0.0.0.0), (1, 1.1.1.1-1.1.1.1), (2, 2.2.2.2-2.2.2.2)
into this:

how can I get all databeses from mysql database?
I was trying such code, but without any results:(
Connection con;
 con = getConnection("jdbc:mysql://localhost:3306", "root",

I am reading a book about Java . It says that "There are three ways to
call a method
1 - Using a method name by itself to call another method of the same
classsuch as maximum( number1, number2, number3 ) in line 21

I have an application that starts a new process every 15 minutes. I
create a new thread for each process so it is possible that they will
run concurrently. I have a data access layer that returns a
CachedRowSet object. When I only have 1 process running, the program

I have a question. I have a JPanel with some custom drawings on it like
rectangles, circles etc. Now I want
to export The Jpanel as a PBM file. I have no idea how to do this.
Maybe someone can point me to some url where I can read how to do it.

I have a problem for a bit of code that needs thread synchronization.
The code is something like this:
classA
{

I'm using Jcreator with java 1.4_2. I noticed that whenever I try to use any
interface I got: class not found. Under Eclipse everything is working fine.
What could be wrong ? For example the program :
************************

Defining
/**
* Puzzled.
*

i want learn java do you help me