I'm a beginner trying to learn from the program below. I launch it >
"java Main images "    images is a folder with four images . It shows a
panel then stop working . The program is not mine then should be
good.... Why ?

I have developed a class reading a text file in reverse way (from EOF
to first line). using RandomAccessFile and calling seek( ) method.
I have only a problem about performance: it isn't a bufferized reader
and so a bit slow and I really don't know how to proceed.

How do i run just a syntax check on a .java file?
I looked at javac documentation but guess i missed it.
Thanks

I need to reverse engineer old large Java Web application which uses
Struts1.1, EJB2, servlets, JSPs, etc. - get class/activity/sequence
diags.
Many years ago did something similar with Rational Rose.

I have a performance issue, I have recorded an ArrayList<[] String> and I
have to take every element (array of String), converting it into a comma
separated record and inserting it into a txt file.
Performance are about 1000 record per minute, I'd like to know if exist some

I have searched quite a bit on t'internet for the answer to this, but
not really found anything simplistic enough for my needs.
Basically all I want to do, is to display a map (of the UK for
example) and feed in lat/long values, and for these to be plotted onto

A little pointer in the right direction needed :)
Is there a suitable framework, that would take a directory of pre-
composed text files for testing, and compare it to expected outcomes
(usually a given message in the console)? I have taken a look at

import java.util.*;
public class test {
    public static void main(String[] args) {
        java.util.List<java.util.List<String>> list =

I'm trying to create a RSA Public and Private key using JCA which I
think is working. It's creating the key files :-) . The problem I'm
running in to is when I try to sign a file with the private key using
openssl I get a error "unable to load key file".

Hi i have this problem,
i want to create a method to make nodes for a linked list
so i have this code..:
class Node {

dear all i want to establish a business in which i want to register
sites , maintain them , and develop them ,if any one can tell me from
where i should start , i would provide the clients webspace on some
nominal charges ( few dollars less then the current market rate)

I am trying to self-teach Java, working through Java, How To Program
by Dietel. A chapter 4 exercise is to make an app that calculates mpg
for tankfuls of gas, then the mpg for the combined tankfuls. I can't
get the output to average in the overallmpg, including the last tank's

I need to move nodes in a XML document ( doc1 ) in namespace A to
another XML document (doc2) in namespace B.
I have tried adoptNode() as shown below but the nodes in doc2 still
have namespace URI for the nodes as namespace A. Below is the code

I have an executable that calls jvm for which i dont have a source code, but
i have the source code for java classes that are called.
I want to attach a debugger to that process so i can fix some code in java
classes.

I have 2 JTrees displayed in jApplicationPanel in a window : Jtree1 and Jtree2 ; they are positionned in a column with Jtree1 above (vertically wise) Jtree2.
Both Jtrees have their respective Model : treeModel1 and treeModel2
As I want to permute positions of both Jtrees I thought ...