Java is a high-level, platform-independent, object-oriented programming language originally developed by Sun Microsystems. Java is currently owned by Oracle, which purchased Sun in 2010.
-3
votes
0answers
15 views
Best books for learning JIRA programming and development [on hold]
Any ideas on how to best learn to program JIRA apps, plugins, etc. other than the JIRA documentation (which is good)?
In other words, how does one become proficient with JIRA (which used Java and can ...
1
vote
1answer
24 views
Best approach for multilingual Java Enum
I'm running into issues with an approach I am taking and am now wondering if I just started down the wrong path and should rethink my approach. Here is what I attempting.
I would like to use an Enum ...
-6
votes
1answer
36 views
What should I do [on hold]
Hi I am new to coding and going to study computer engineering but I don't know what language to go for or what software to use does anyone have an idea
Can someone please help me
-1
votes
0answers
29 views
Design pattern for XML parsing on different files
I have two XML files with different structure.
I have written two SAX Handlers for it.
I am creating these handlers object from a utility class.
public class Util {
public static void parseFile1() ...
0
votes
2answers
127 views
When I create an object, is fresh memory allocated to both instance fields and methods or only to instance fields
I have a following class
class Student{
int rollNumber;
int marks;
public void setResult(int rollNumber, int marks){
this.rollNumber=rollNumber;
this.marks=marks;
}
public void ...
-2
votes
0answers
24 views
Steps for Oracle Certification [on hold]
This is not a error question.I need some advice from yours in career path.
Currently i am working as an Android Developer last 9 months.And now planing to move ahead in pure Java Development.
I ...
-2
votes
1answer
83 views
JAX-RS and application wide business logic/resources. My brick wall has be found
I think I'm definitely hitting a brick-wall in understanding how to implement this. I would very much appreciate any assistance in this.
All my JAX-RS links, Oracle, IBM and Stack overflow links ...
9
votes
4answers
487 views
Is it an overkill to wrap a collection in a simple class only for the sake of better readability?
I have the following map:
Map<Double, List<SoundEvent>> soundEventCells = new HashMap<Double, List<SoundEvent>>();
This HashMap maps double values (which are points in time) ...
0
votes
0answers
94 views
Do thin fluent builder method chains have any need to be “extensible”?
In an environment where refactoring is difficult extensibility can be a life saver. However, this is no excuse to over engineer code.
Given that a thin fluent builder method chain is backed by well ...
0
votes
0answers
42 views
How to connect Android App to MongoDB deployed on Google Cloud
Currently I am working on a simple app which will be able to connect to MongoDB which is deployed in Google Cloud. I have set it up MongoDB ocaly on my computer and I have made a little JAVA console ...
-1
votes
1answer
75 views
Naming of methods that perform some actions under some condition [on hold]
I often write such methods to avoid duplication in code and I give them name such as doSomethingIfSomeCondition().
For example:
public class TaskDownloadFile {
private boolean started;
...
2
votes
3answers
122 views
Proper interface for calculator library?
As practice, I'm planning to implement a multivariable calculator library. The idea is that you can define a function, such as f(x, y) = sin(x)^2 + 3*y^3, and then you can evaluate it with specific ...
-3
votes
0answers
8 views
incorrect output for set input [migrated]
So I almost have this code correct but it's not giving me the correct output for some reason and I can't figure out why. This is what I have.
That is what I have so far but I need the output to be
...
0
votes
2answers
227 views
Organizing code in a 2 man team
I've been working with a buddy of mine on a school project. We forecast it'll take ~2 months, so it isn't a small scale project at all. Communication and splitting the work effectively has been a ...
0
votes
0answers
39 views
Mixing newable and injectable in a Callable
I recently read http://misko.hevery.com/2008/09/30/to-new-or-not-to-new/ which discussed newable vs injectable objects.
What would you do if you needed to make a Callable that talks to some service ...
1
vote
1answer
145 views
Java Desktop Application Requirement - Is sockets the preferred choice ?
I'm currently working on a requirement for a desktop application - using Java
If for some reason the GUI crashes, it shouldn't affect the background
process. Once the GUI is restarted - the ...
0
votes
0answers
86 views
How far to go when future proofing fluent-method-chained-DSL test code?
Is it worth implementing interfaces, or using the getThis() trick, or even static factory methods to future proof against the need to extend this DSL?
The current design is a pair of thin ...
3
votes
2answers
123 views
To subclass or to wrap for “default” implementation?
I'm creating a toolset in Java consisting of many Natural Language Processing (NLP) tools, such as Tokenizer, POS tagger, Lemmatizer, Sentence parsing, etc.
I want to put all good and publicly ...
1
vote
0answers
69 views
How to efficiently handle related data in MVC?
Talking about MVC with servlets and JSP's, in a context about products and manufacturers , when querying the application for a list of products:
the servlet loads a list of products from the ...
1
vote
1answer
147 views
Do you use static keyword to declare single instance pattern? [duplicate]
I just come across this code and find it interesting to know whether you consider this as another single instance pattern?
public class Initiator
{
private static String str;
// there is many ...
0
votes
0answers
41 views
How to get values to output as a currency? [closed]
I am working on calculating change, and investment rates with java. My code gives me the correct values, but does not display them how I'd like. For the first part, when I calculate the dollar amount ...
-2
votes
0answers
31 views
How to change the alignement of contains in a JScrollPane [migrated]
I am working on a GUI to manage bank accounts.
I use a JPanel in a JFrame to list all the account register as buttons, and a JScrollPane to extend the view. When I run the program, the scroll bar ...
-2
votes
0answers
48 views
Auto generate project status reports thru email text analysis and summarization
I hate writing status reports for my boss. I usually spend an hour each Friday morning scanning emails trying to remember what the heck I did for the past week.
A typical report looks something like ...
0
votes
0answers
8 views
How to delete .tmp file in fileupload struts2 [migrated]
I have used file-upload (common fileuplod) in strtus-2.3.15.3 .
There is one Form in my .jsp with multiple field with many diff type(textfield,textarea,hidden,file) including FILE and obvious SUBMIT.
...
-3
votes
0answers
18 views
share button in custom listview doesn't work [closed]
I'm following share a text with button in custom listview but it doesn't work . this is code for OnClick in ListViewAdapter.java :
OnClickListener clickListener = new OnClickListener() {
...
0
votes
0answers
47 views
Floating point number to binary
Which Algorithm does java uses to convert floating point number (Ex:0.15625) into binary(0.00101).
Whether java uses normalized form or denormalized format ?
If i type "float ab=0.15625" in java ...
-3
votes
0answers
28 views
Why wait and notify is declared in Object class instead of Thread [duplicate]
I need practical answer of this question
Why wait and notify is declared in Object class instead of Thread ?
answer with example will appreciated.
1
vote
2answers
99 views
Changing message without redeploying / restarting application
Question: In java application, How to change error message or simple alert text without redeploying / restarting application
Closest answers I could think up (1) is to have a new error messages in ...
-3
votes
0answers
25 views
Drag and drop model for modelica [closed]
Is there any way to connect Modelica with JaamSim? As I want an open source GUI with drag and drop option for simulation with Modelica running in back-end.
I have already tried SimForge but there is ...
-2
votes
0answers
75 views
How to plan development [closed]
I am a self-taught 17 year old who knows Java and C# as well as I can, be learning them for over a year but I have never coded anything so therefor no experience.Me and my friend are working together ...
-4
votes
0answers
56 views
This program in Java doesn't stop executing! [closed]
I have written this program but it doesn't stop executing. Can you help me with it?
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, ...
0
votes
0answers
69 views
Designing a simple file manager [closed]
I've been trying to come up with the best way to design my file manager for a project. I need to work with many file implementations and I have a File class made of 2 classes inside: Data and ...
-2
votes
1answer
137 views
What is the largest size a HashSet or TreeSet be? [closed]
So I am working on a solo project that involves a lot of strings. In one of my smaller test cases there will be at least 70 million elements. So my question is, what is the largest possible size a ...
2
votes
3answers
240 views
Could the creation of many methods in Java affect performance? [closed]
I was told by a colleague that in Java, the performance may be worse if we create more methods, stacking many methods calling over them in JVM, specially in a Java EE environment.
This seems to ...
6
votes
2answers
436 views
Which is a better pattern (coding style) for validating arguments - hurdle (barrier) or fence? [duplicate]
I don't know if there are any accepted names for these patterns (or anti-patterns), but I like to call them what I call them here. Actually, that would be Question 1: What are accepted names for these ...
0
votes
1answer
92 views
Making a configurable Java formatter? [closed]
AFAIK there's just java.util.Formatter and java.text.Format and AFAIK none of them is extensible. I mean not subclassing, but the possibility to specify how to handle objects by class, e.g., saying
...
0
votes
0answers
4 views
Problem with opening JFrames from LWJGL [migrated]
I'm making a program that uses LWJGL to render a Display window, and it also listens for keyboard input to prompt it to open a swing window. The problem is, upon the first keyboard prompt, it opens ...
2
votes
1answer
202 views
What is the advantage of using Direct Web Remoting over a REST web services design? [on hold]
I have an enterprise Java web application deployed in tomcat. I am looking for ways to integrate a HTML & JS UI with the mid tier java code. So far, looking around I have found that there are two ...
-2
votes
1answer
47 views
Rename PDF extracted Pages File from a Single Booklet PDF in correct sequence [closed]
I have huge PDF files which are in booklet format.
example,
Assume a booklet pdf file has 24 pages which each page contains 2 pages which is in two sides - left side and right side.
The first page ...
0
votes
0answers
12 views
Java for loop: why can't I declare two variables in the for loop 'header'? [migrated]
I always wondered, why doesn't this compile?
for(int i=0, int q=0; i<a.length; i++){
...
}
Why doesn't Java allow me to declare more than one variable in the for loop 'header'? Is there a ...
1
vote
0answers
71 views
DataMapper for a MMO game plugin to send packets
I am working on an plugin for some game-server. The information about the plugin is not really necessary.
Few points you might find helpful to answer to this question:
The server
The server is ...
0
votes
5answers
340 views
Liskov Substitution and SRP Principle violation - how best to structure this scenario?
While learning SRP and LSP, I'm trying to improve the design of my code to comply best with both of these principles. I have an employee class that has a calculatePay method on it. Firstly, I believe ...
0
votes
1answer
110 views
Simple unicode application?
I want to create simple language learning applications to help friends in learning languages. A simple Java console application would do the trick, but the Windows console does not seem to handle ...
-3
votes
1answer
75 views
How valid is the statement “write once, debug everywhere” by some Java users? [duplicate]
How valid is the statement "write once, debug everywhere" by some Java users?
If it is true, what is the effect to us?
1
vote
3answers
120 views
Null checking whilst navigating object hierarchies
I had to implement some code which traversed a small object hierarchy to fetch a value and display it in a TextView object (this is Android / Java). I had to do this 6 times to populate 6 TextViews ...
-2
votes
0answers
13 views
Java GUI with JFrames [migrated]
Today I started learning Java GUI and tried to create a simple window on my Ubuntu. I am using jre7 for now.
I wrote code exactly from tutorial because from experience there are stuff that doesn't ...
2
votes
2answers
106 views
Recreating files from shell script or java?
I have java application which takes a file, which is created by a process running on terminal. I start the process using a small shell script. Then run the Java application and it reads the file ...
-2
votes
0answers
33 views
How to connect a Django app with a Java Web app using JMS
I'm dealing with my DB systems course project, it's a stock exchange simulation app using Oracle 10g, the deal is that the support is for Java, but i'm going to do this in Python.
The last iteration ...
2
votes
1answer
195 views
Any OOP design pattern that is somewhat representative of all of the SOLID OOP design principles at play?
I'm trying to teach an object oriented design principles course (on SOLID) at a training institute. I also want to teach the students a few OOP design patterns such as factory, singleton and one ...
0
votes
0answers
17 views
Apache Wicket, updating data without using a form, is it safe?
I have a ListUser.java class with a datatable, displaying UserData information, displays 4 columns, the last column is an AbstractColumn that has on it's populateItm method has added a inner class ...
