Hey! There has been a question on my mind for a while regarding the JRE and the class loader (or, loading classes into RAM if it's different).

Java classes define variable members, methods, and...

Have you researched this?
Perhaps, and especially for questions such as yours, you should check Google or some other appropriate search engine for results.

You seem to know the words "Java" and...

One reason for the "no" is that Java uses Java-specific resources.. Take the hundreds of importable classes, for example. Take swing, awt, net, etc, etc, and realize that all of these packages were...

You have to analyze the input one character at a time...

Say we have a string: myString

Set up a for loop with a lower limit of 0 and an upper limit of myString.length()-1 inclusive

Read...

Good thoughts. I've always been a strong supporter of the "open source" concept, even though (as you've made it clear) the source need not be distributed for another programmer to find out how the...

Yea, like someone in serious need of "homework help".

Jars are just another archive-type file.. The purpose is to hold a number of files under a common name, "myfile.jar", to keep organized and to...

Hmmm. I can't be super helpful before I fall asleep tonight, but..

First thing is working with Generics (http://java.sun.com/docs/books/tutorial/java/generics/index.html)

Regular expressions?...

*squints at code*

.....

Haha, silly me. I missed this at first glance.

1) instead of *.addActionPerformed(this); use *.addActionListener(this);

2) e.getSource() returns an Object, and...

Unplug the keyboard.
Or write the impossible virus.

Not sure what you want to know...
Locking, aka, disabling input?
Input to the entire system?
I dunno if Java can do that.

Maybe if...

Does (ballX, ballY) represent the center of the ball, or the top-left edge of the bounding square?

For one, this if statement looks somewhat "iffy":
if (ballY < 0 || ballY > (getHeight()-25) &&...

import java.io.*;
import java.util.*;
import Employee;



The problem is with import Employee; --- you can't import classes from the same package without at least giving the package...

Often we're faced with the need to represent primitive data types as readable/writable bytes that can be sent through a data stream. In Java, there are classes such as...

Is there any way we can filter threads like this from being posted? Or, can they be removed? I'm not sure, but I think DaniWeb could go without such dribble as do-my-homework demands.

Oh my.

For one, I think this is how you meant to represent your code:

class Rev {
char a[];
char i=3;

void str() {
for(i='A';i<'D';i++) {

I was thinking the same: wonderfully, unnecessarily large, but, that's how I used to code when I first started out. Make friends with arrays. Your exact program - the logic and all - could be...

Alright!

I love answering my own questions. I hope that someone can learn something from this!

I conducted two tests. The first test locks the entire myArray array. The seconds locks a...

My question today is regarding multidimensional arrays, and synchronization.. I'm working on a client/server project and I'm not sure about the theory of an idea I came up with:

I have an array:
...

:o I noticed that little capital after posting.. Just didn't change it. Please excuse any naive stylistic choices, as I'm not yet completely accustomed to "convention".

And I did stumble upon the...

Hi! I'm looking to learn something today, and I have just the question.

In writing a recent program, I found no Java method suited to compare two byte arrays. Maybe the method exists, or maybe...

Only way I know how to emulate a switch on strings, and this has already been mentioned without example code, is like the following:

void StringSwitch (String str) {
if (str == null) { /* If the...

So I've run into this situation a million times in my "learning career" and I've always found a long way around the issue so as not to risk throwing unnecessary exceptions..

Let's look at a simple...

BECAUSE, that's not fun.
I "play" with Java to learn.
I know there's an easy way around everything, and if this were my job, I'd probably take the easy way. I, however, like to learn, and I like to...

Long post, I know, but I just discovered:
Likewise, for the chararray-to-int method:
(it doesn't work properly any other way. Try 2147483647 as the value.)

public static int ToInt (byte[] data)...

SO, I'm playing around with an idea. I'm trying to convert primitives to and from a char array for file logging. I've got all the details worked out, but I don't understand something.. Take the...

Ahh! Thank you very much!
I reliased today when I found the "This project is not JDK 1.5 compliant" error that my workspace wasn't configured for 1.5, so I checked workspace settings and, sure...

I installed Ubuntu Linux this morning and got java jdk 1.5.0_09 installed, along with Eclipse, and then I imported a project I've been working on into the Eclipse workbench.
All configuration is...

I hardly understand what you're doing or why, but here's the recursive solution.. Recursion is unnecessary and stack-dangerous, by the way. (StackOverflowErrors are ugly). Using a StringTokenizer is...

I think the proper way to escape Quotes is

"Here is some \"Text inside Quotes\"" :rolleyes:

And no. It's not platform-independent.. That would be the File Separator, which is "\" in Windows...

I think I may know what you're talking about, as I faced the apparent issue myself just last week. It was quite something. If I've misunderstood and all the following information is unrelated, then I...

Hi! Here's my scenario:

I have an application that utilized the DatagramSocket class. I also have a favorite Port number that I would like it to connect to Every time I load the application. One...

:cool: There was nothing wrong with my code.

It was the JRE/JDK..
I installed version 1.5 (I was using 1.4.2) and it works perfectly now.

Sorry for the confusion, but if anyone else encounters...

Yep. That's pretty much what I had:


JTextArea output = new JTextArea("");
//output.setEditable (false); // leave true while testing

JScrollPane JSP = new JScrollPane (output);...

Sooo...
I just started designing the GUI for an application that I'm writing..
And, well, I can't get either the awt.TextArea OR the swing.JTextArea to work properly.
Here are snapshots of both,...

................................................. (Delete this -- Accident Post) .................................................

It won't let me edit my previous post, so..

Incase anyone noticed in my code, in the main function I said...
public static void main () {
// Dunno why, but can't get this to run under SuSE 10.1...

:eek: OH - MY - GOSH.

:cheesy: I figured it out.

I think it's been about a total of.. hmm.. 10 hours, now, trying to get this?
I've been playing with it all morning, and it finally compiled...

Here's an example I wrote that works, but it's primitive.

TestExtension.java

public class TestExtension {

public static String retClassName () {
return "Class Name: TestClass";
}

So. I'm having an issue.

I'm building an application that loads class files as extensions during runtime. I'm doing this, becuase I want my application to be able to grow in the future without...

YAY! :mrgreen: it works! that took a large chunck out of my life, but finally I came up with the following code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import...

This is irritating me so bad, I have spent three hours aimlessly trying to get JScrollPane to work on my JList and I can't figure it out.. here is the code, please make the scroll bars work! :sad: ...