I want to know if a java class name can be declared as "pack1.ClassName". I know the naming conventions rules. I know that this kind of names are not supposed to be used. But I am just curious of whether Java accepts such kind of names also i want to know if $ClassName, _ClassName are valid for classname and are the being used anywhere in the application development.
View RepliesSo I'm not entirely sure what to name my packages. Sometimes I have to many and it becomes overwhelming. Sometimes I don't have enough and I cannot keep my files organized. What is a good naming convention for Java packages?
View Replies View RelatedThe naming conventions for coding Java applications are clear to me. I'm wondering what the best practices are for naming Java projects e.g. when creating a new project in NetBeans IDE or in BitBucket?
View Replies View RelatedWhy is this not valid in java:
Both uses public with the same class/interface name.
Test.java:
public class Test implements Test{
/// Some codes
}
public interface Test {
///Some methods
}
I'm making a program in which I'm required to create objects that represent employees. My instructions for the driver say to "Create a new Person [] called staff initialized to the following object - fred, barney, wilma, betty, wilma2." The information such as name, year hired, ID number, etc. is given.I couldn't figure out the syntax to give each employee a specific name, so I just wrote what I knew.
Person[] staff = new Person [5];
staff[0] = new FullTime ("Flintstone, Fred", 2005, "BR-1", 65000.12);
staff[1] = new Adjunct ("Rubble, Barney", 2006, "BR-2", 320, 48.55);
staff[2] = new FullTime ();
staff[3] = new Employee ("Rubble, Betty", 2011, "BR-4");
staff[4] = new FullTime ("Slate, Wilma", 2009, "BR-3", 48123.25);
It works for my methods to calculate things such as number of years of employment and print a paragraph about each employee. The problem is that giving each object a name is actually necessary, since I have to update the default [2] to have information given not in the Person type levels (It goes Person→Employee→Fulltime and Adjunct) but in the driver itself and then compare it to [4]. Wilma is supposed to be [2], and Wilma2 is supposed to be [4]. how to format these objects to have the distinct names (for the objects themselves, not just the string name) of the people?
Below I've attached a screenshot of how I've been naming my various java projects as I go through my current textbook. I'm not sure if I'm naming them correctly. I'm on chapter 5 of Introduction to Java Programming by Y. Daniel Liang and he is currently discussing methods and classes. I'm not sure what my projects would be considered (methods, classes, or something arbitrary like projects). Further, if I wrote a program, like loanCalculator215 for example, how could i call that in a different program, like primeNumbers?
View Replies View RelatedI know the normal way of naming objects is
Pipe pipe1 = new Pipe
but I want the objects to be made inside a loop and named after how many times the loop have been gone through so I tried
Pipe pipe(numberOfTimes) = new Pipe
where numberOfTimes was a variable counting the loops. This is not working.I need the naming to be pipe1, pipe2, pipe3 etc depending on how many times the loop have been pased
Scanner keyboard = new Scanner (System.in);
String morePipes = ("yes");
int dimRor;
int numberOfPipes = -1;
[code]....
Which is considered clearer and better for naming?
class SpeedAnimation {
//rate to increment frames at 0 speed
public float baseIncrementRate;
//additional rate to increment frames at, scaled by the speed
public float speedIncrementMultiplier;
//current fractional frame index
public float currentFrameIndex;
//give the upper and lower index bounds to animate between
public int startingIndex;
public int endingIndex;
}
vs.
class SpeedAnimation {
//rate to increment frames at 0 speed
public float base;
//additional rate to increment frames at, scaled by the speed
public float multiplier;
//current fractional frame index
public float index;
//give the upper and lower index bounds to animate between
public int start;
public int end;
}
I've always been really elaborate with my names, because I thought that being more descriptive is more precise and lowers the chance that names might clash with each other, but then I noticed that a lot of my code becomes really lengthy and tiring to read, ie.:
float speed = body.getVelocity().len();
float positionIncrement = (baseIncrementRate + speedIncrementMultiplier * speed) * deltaTime;
currentFrameIndex += positionIncrement;
currentFrameIndex = currentFrameIndex % (startingIndex+endingIndex-1) + startingIndex;
I have tried running the java application without adding the site to site list in java security tab. But I get a sand box message as APPLICATION BLOCKED BY SECURITY SETTINGS. How to run the java application without adding the site to site list in java security tab.
View Replies View RelatedI want to develop a Java program that uses OpenScript APIs to test my applications. The OpenScript framework automatically creates the Java Code so I was thinking of either using this code or create my own using the APIs.
I tried both options using NetBeans but I'm getting errors everywhere starting with the library import. I'm pretty new to Java so I'm sure I'm missing a lot of things here. I pasted the code below from the OpenScript framework that want to use in a stand-alone file for your reference.,
import oracle.oats.scripting.modules.basic.api.*;
import oracle.oats.scripting.modules.browser.api.*;
import oracle.oats.scripting.modules.functionalTest.api.*;
import oracle.oats.scripting.modules.utilities.api.*;
import oracle.oats.scripting.modules.utilities.api.sql.*;
[Code] ....
I've written a java application with several classes all in the same .java file. It works just fine. Now, I've broken it up so that each class has its own .java file. Still works fine. My next step is to put those classes into a package, but I'm not about to get the program to run.The .java source files are all in /home/user/src
I've set the CLASSPATH to /home/user/src..All of the source files have "package com.myfirm.program" on the first line.I compiled the application with:
javac -d . File1.java File2.java File3.java (etc...)
the compiler created the directory: /home/user/src/com/myfirm/program and put all of the .class files in there.So how do I get the program to run? if I run from /home/usr/src
java File1
I get: Exception in thread "main" java.lang.NoClassDefFoundError: File1 (wrong name: com/myfirm/program/Program)
I create 2 files:
CircleCalculationMethod.javaMain.java
In Main.java, How can i call method in CircleCalculationMethod.java ?
Should I put everything in same folder ??Should i do something like "import CircleCalculationMethod.java"Should i do something like create a package ...
I use Eclipse software
The title of Question might seem old and previously asked.But I have a Question that what is difference between javaSE and Java EE.Although I knew what comes under JavaSE and What is under JavaEE.But My question is that.
What happens when we add PATH in our Environment Variable How does Eclipse or Other IDE use it?
Second Question is.
For Java SE we declare a Path Variable but for Java EE we do not add any library?(I know we add some jar file like for Servlet(Servlet-api.jar) and for EJB(Ejb.jar),But What is actaul difference?
creating a program that will output something like this:
Enter an Integer: 1405302(user inputted)
Your integer contains 2 even digit(s), 3 odd digit(s), and 2 zero(s).
I know about coding in general, Java, C, Python, SQL etc. but I barely know anything about making code come together on the web. I have a vague idea about what things like libraries and frameworks are,I'm interested in making a web application with which relies on Java do to the data processing. The idea is that the user inputs some messages, clicks submit, the text is taken away and processed, and the results are displayed on the screen. I would like the UI to be smooth with a modern look and feel.
Also, I usually do programming on Windows but I could also use Linux, so if I'll come across any specific drawbacks using Windows.
How do I specify the Working directory where the Java app is located? It may be different on different machines.
View Replies View Relatedwhat is seriazable.But I am not able to come that why it is used and when should I declare my class(Object) as serialzable and when not?
View Replies View Relatedi need to develop a API in java. that API will be communicate with the some site. Need to import and export the contacts into that site databases.
View Replies View RelatedWhen I try to convert this value, "Testingu2120" (along with UTF coed u2120)comes as a string as part of SOAP response. I need to convert this UTF-8 characters in to a symbol, in this case it is SM (Service Mark) symbol and show it on the UI.
How can we achieve this in JAVA?
I have four different UTF-8 character set to convert.
TM - u2122
SM -u2120
R - u00AE
C - u00A9
I would like my application to execute a command in cmd. The command looks like
start "" /D "C:Riot GamesLeague of LegendsRADSsolutionslol_game_client_sln
elease s .0.1.55deploy"
"League of Legends.exe" "8394" "LoLLauncher.exe" ""
"spectator 95.172.65.26:8088 P3hNrXYZlaM3iJ9ximtzJWHbwLhvbimJ 953089676 EUN1"
So my question is how do I do this?
I tried this, (just copy paste the command):
package MyProject;
import java.io.IOException;
import java.io.InputStream;
public class Cmd {
public static void main(String[] args) {
try {
final Process process = Runtime.getRuntime().exec("start "" /D "C:Riot GamesLeague of
[code]....
We started learning about tables and have a little program. The teacher gave us an excercise and doesn't works (not running), I receive too many errors. So any simple java program with tables with 20 numbers, that is giving random numbers?
View Replies View RelatedWrite a function (or functions) that given a collection of files will produce a sum of integers from each line of each file. Each file can have any number of lines from 1 to N. Each line can contain only one integer and no other alphanumeric characters. All of the numbers from all of the files should be added to the final result. The result is just one number.
For either, what we are looking for is:
1. Clear separation of concerns
2. Well defined objects / interfaces
3. Application of good OO design principles to solve the problem
4. No code duplication
5. Test Driven Development
6. Well refactored code
7. Well tested code
I have to create a new project in which i have to take the inputs from the user and create the XML schema out of this. How can I do this the best way .
View Replies View RelatedI am trying to run a Powershell command from Java that creates an Active Directory group. I don't get any errors, but it doesn't work either. I can take the output from this class and plug it into the CMD prompt and it works fine.
Java Code:
public class CreateAD {
public int creategroup(String groupname, String description){
String runadcreate;
int errorfree =0;
runadcreate = "powershell Import-Module ActiveDirectory
[code]...
I'm converting from ASP to Java for a legacy site. I believe the first part of the if statement is right but I'm having an issue within the else staetment. I'm getting date is undefined, I've tried using getYear and getDate but have not been successful.
ASP:
If Request("action") = "results" Then
aMonth = Request("selMonth")
aDate = cint(Request("selDate"))
aYear = cint(Request("selYear"))
Else
aMonth = UCase(MonthName(Month(Date()),true))
aDate = Day(DateAdd("d",-1,date()))
aYear = Year(Date())
End If
[code]....
how to use JFrames and button and so on in Java. I found this video on youtube and followed it along, however even though my program is virtually identical to his, I'm still getting errors.
Here's the video I was watching: Video
And here's my code:
import javax.swing.*; //Imports JFrame and JButton for use
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.*;
import java.awt.*;
import java.awt.event.*;
public class swing
[code]....
The reason why I'm importing some many things is I'm trying everything to try fix my problem.
He's the error messages I'm getting:
frame2.add(panel);
^
C:UsersWindows 8Documentsswing.java:42: error: illegal start of expression
frame2.add(panel);
[code]....
I used to make the button just create another frame without additional labels but I changed it to be even more similar to his program just to rule everything out. Also initially my program varied quite a bit, I've changed everything to be like his. Even without the ";" error I got, I kept telling me I was not allowed have my class as static, even though the guy in the video has it set to static. Also I don't think my "setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);" is working as it doesn't change color.
I think the problem is with my panel, it isn't adding to the frame for some reason.I'm using TextPad7 and I'm using Win8.
C:UsersWindows 8Documentsswing.java:42: error: '(' or '[' expected
frame2.add(panel);
^
C:UsersWindows 8Documentsswing.java:42: error: illegal start of expression
frame2.add(panel);
[code]....
I would also like to point out that some of the comments are out of date and are referencing the way the program was before I made it just like his. For example I know my second class isn't inheriting the first class.