36,051 Topics
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 | I am trying to create a runnable jar file .. did a few days ago with a single class and worked fine but now it doesn't seem to be working as good with multiple files .. Here is what I did 1) - create manifest.txt the contense of it is … |
| | Hey guys! I'm writing this really long code for practice. Got really rusty with Java so I gotta get brain working again. Anyway, the first part of the code asks the user for the number of employees; the for loop then keeps asking the user to input employee names depending …  |
 | Hi Dw I'm not a master in java and I'm kinder new to it even though I can do certain things in java. I'm developing an object oriented project and I've done with the object class now I want to make the device be able to listen and execute the … |
| | I was trying to develop the system so I am stuck, how to insert the image  |
| | It's not really a problem that I am facing, more like looking for explanation ... I had this import java.util.*; import java.io.*; public class ReadFile { private static int lines=0; private static List<String> words=new ArrayList<String>(); private static String fullLine; private static int indexOfSpace; private static String getWord; private static String …  |
| | I have two classes that I am compiling from command line. One is Vehicle class, class Vehicle{ int passangers; int fuelcap; int mpg; } and another is VehicleDemo class. This class instantiate an object of Vehicle class. class VehicleDemo{ public static void main(String args[]){ Vehicle minivan = new Vehicle(); int … |
| | I am trying to figure out why this one part of my program is not working. I am trying to count the number of the letter s a user types in when prompted using indexOf. For some reason it will not work correctly. Thanks for any help. import java.util.Scanner; public …  |
| | import java.util.*; public class JavaApplication23{ /** * @param args the command line arguments */ static Scanner console = new Scanner(System.in); public static void main(String[] args) { //creat 5 arrays and declare String [] Student= new String [10]; int [] Quiz1 = new int [10]; int [] Quiz2 = new int …  |
 | Hello im trying to connect database with my java program for register/login but im not doing well, i have online database on godaddy and i cannot connect with the java program i tryed with using the `URLEncoder` and it works for registering but for loging in i cannot make it … |
| | hi i can't undestanding this why the main function in java is static and static function can call using class name. And why we declare main function as public. i can not understanding this procedure of main function in java. plz help me. |
| | A few days ago, i made a hangman game and I really want to complete it in any aspect. One of my ideas now is to "import" words from a file. Currently what I have is an Array of Strings (just a few words inside for testing) and what I … |
 | Tried to run ServiceServerImpl.class with rmic and got this error. Below is the command prompt text pasting. "C:\Program Files\Java\jdk1.7.0_21\bin>rmic.exe ServiceServerImpl error: File .\ServiceServerImpl.class does not contain type ServiceServerImpl as expected, but type serviceserver.ServiceServerImpl. Please remove the file, or make sure it appears in the correct subdirectory of the class path. … |
| | # What I am using: # I am using java & libgdx to create a game in desktop & android. # Error: # Could not find class 'com.badlogic.gdx.graphics.g2d.freetype.FreeTypeFontGenerator', referenced from method com.aa.GameStates.MainMenu.init so on desktop version, everthing work fine and no errors. Problem is when I run it on android. … |
| | I'm trying to make delete row function in primefaces datatable. I'm using this method: package logon; import java.io.Serializable; import java.util.ArrayList; import java.util.List; import javax.annotation.PostConstruct; import javax.enterprise.context.SessionScoped; import javax.faces.bean.ViewScoped; import javax.persistence.EntityManager; import javax.persistence.EntityManagerFactory; import javax.persistence.PersistenceUnit; import javax.persistence.Query; @ViewScoped @SessionScoped @javax.faces.bean.ManagedBean(name = "logonTest") public class LogonTest implements Serializable{ @PersistenceUnit(unitName="Webbeans_RESOURCE_LOCAL") private EntityManagerFactory emf; … |
| | please tell me in how many ways OBJECT ORIENTED PROGRAMMING is different from procedural programming in JAVA |
| | Hey guys! So I'm writing a program that takes in a user input (1-3) and then executes the corresponding method. I keep getting the wrong output. For example, for prob1 when I input "john doe" it prints "Unauthorized!". And I'm like, foolish computer! I am your MASTER! How can I … |
| | Hey guys! So I'm writing a code that takes 10 numbers from the user which is stored in a array. The user then inputs the problem number (1 or 2) depending on what they want to do to the array. Unfortunately, I'm getting and error on line `array[i].prob1(); `.. Here's … |
| | Hi, I jus want to ask why is it that the pacman will move but it will get larger when it is painted..also is that the proper way to draw?. here is the code import javax.swing.*; import java.awt.*; public class Mypacman extends JFrame implements Runnable{ int x; public Mypacman(){ setVisible(true); … |
| | there is a simple code but i want when i click submit then ther should open google.com(like any web) in another tab and in the same page there should be one another page. How can i do this.. a sample code is.. <%@ page import = "java.sql.*" %> <% String … |
| | Hello guys this may be easy question but I m finding it quite tricky. Scenario is I m printing all the values from the database table using jstl foreach. <c:forEach items="${pal}" var="p"> <tr> <td><c:out value="${p.pid}"></c:out></td> <td><c:out value="${p.pname}"></c:out></td> <td><c:out value="${p.pdesc}"></c:out></td> <td><c:out value="${p.pestd}"></c:out></td> <td><a id="popa" href="#">Allocate</a></td> </tr> </c:forEach> And now onclick Allocate … |
| | I want to save selected text file as html file i have written following code JFrame parentFrame = new JFrame(); JFileChooser fileChooser = new JFileChooser(); fileChooser.setSelectedFile(f12); fileChooser.setDialogTitle("Specify a file to save"); int userSelection = fileChooser.showSaveDialog(parentFrame); if (userSelection == JFileChooser.APPROVE_OPTION) { File fileToSave = fileChooser.getSelectedFile(); System.out.println("Save as file: " + fileToSave.getAbsolutePath()); … |
| | How can I keep track of the unguessed letters yet in my JTextArea? In the non gui version I used an arraylist, worked fine but should I leave the arraylist and use it to track unguessed caracters ? The method is still console based, just started implementing the gui made … |
| | I was trying to figure out how to insert pictures into Java, but as music in the background plays, the pictures alternate. It would be really great if someone could include the music code too. Thanks for any help in advance. |
 | Hi Everyone, Can I ask your assistance how to integrate the AMBRA platform in Tomcat? "Ambra is an innovative Open Source platform for publishing Open Access research articles. Architecture Features Ambra is written in Java." Actually, done for installation in tomcat but the Ambra is the next, but how? Regards, …  |
| | OK, I have been experimenting around with GridBagLayout and I'm getting the hang of it. Things are looking the way I want them to on the INITIAL drawing of the GUI. However, when I RESIZE the JFrame to make it smaller vertically, at a certain point, the proportions get skewed. … |
| | I'm trying to create a .txt reader and inserting the read data to the cleansheets software we are editing in class but instead of putting the correct data it does nothing. I made some prints and this is what I obtain: D:\Documentos\Desktop\ImportTest.txt cacacaca ----- [[Ljava.lang.String;@73a175] cacacaca ----- [[Ljava.lang.String;@73a175, [Ljava.lang.String;@364cf2] cacacaca … |
| | i can not understanding the error of this program interface Test { void show(); void input(); void square(); } class Run implements Test { int a,b,c; void show() { System.out.println("a = " + a); System.out.println("b = " + b); System.out.println("c = " + c); } void input() { a=2; b=3; … |
| | I had Developed a software in java. Need to update the software occasionally.How to update it with notification. |
| | Well, the title says it all. Imagine that I have HelloWorld.java , I want to create an executable jar from it. I know that if I use IDE such as eclipse I can create it there but how can you create it without that? |
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 | Please help. I wrote a quicksort with a median of either 3 or 5 to be the pivot and I can not figure out, for the life of me, why my code won't run. If the boolean isMedOf3 is true, then the partition uses a median of 3 to choose … |
| | i have a problem with code below import javax.swing.*; class HelloWorld { public static void main(String x[]) { JOptionPane.showMessageDilog(null,"Welcome","Bscs",1); } } i try my best but i can not understand the following error HelloWorld.java:5: error: cannot find symbol JOptionPane.showMessageDiloge(null,"Welcome","Bscs",1); ^ symbol: method showMessageDiloge(<null>,String,String,int) location: class JOptionPane 1 error plz help … |
| | Hi everyone, this is my first post here. I am new to Java. I understand it when I see it, but writting it is difficult for me. That is for now. I am building an app, which is going to be a quiz. There are 10 questions with fur answers … |
| | How is it possible that if I type A in a textfield, that is added to String variable which is empty and I can then pass that string as a argument to a textfield for display what I typed. for example: String letter2=""; if(ke.getKeyCode()==KeyEvent.VK_A) letter2=letter2+"a"; btextfield.setText(letter2); |
| | I have assigned to create a multichat application that require to public message to all client, private message to certain client and show the user list, anyone can tell me which part should i do to implement private msg and online user list (where will show the name after client … |
| | postfix and prefix increment or decrement operators very very confusing for me i try my best but i can not understand the basic different between them plz help me i know The prefix form first performs the increment operation and then returns the value of the increment operation. The postfix … |
| | Some time ago, I wrote some code, which uses DFS to find whether there is a path from a source vertex to a destination vertex. However, I am thinking now what if there is more than 1 possible way? What comes to my mind is save paths in an ArrayList … |
| | **Sudoku Solver** I am writing a program to solve Sudoku Puzzles. This thread will contatin my progress throughout the project and hold any questions and replies. |
| | what is command line argument in java and how it is work public static void main(String []args){ for (int i = 0; i < args.length; i++) System.out.println(args[i]); and what is .length in upper code. is it function no it is not function is it class no it is not a … |
| | hi guys, hope you are doing very well. I've been working on a program that if I enter lowercase letters in one textField the other should display it in capital letters with the help of Event Handling but I am constantly getting these two errors. I'm a beginner so would … |
| | I am trying to build a java program for user login but I am not sure if my MVC design is accurate. I have the following classes: LoginControl - servlet LoginBean - data holder java class with private variables getters and setters LoginDAO - concrete java class where I am … |
| | Hello, I am trying to receive the documenttext of a web browser after the user has clicked a javascript button which loads more information on to the page. Instead of getting the new code, it simply gives the original code which was given once the page was loaded. Any help … |
| | Hello guys, How to Eliminate ifs and elses using polymorphism, so that the code is more compact and easy to understand. public void update( ){ // is its dead it does nothing if( dead ) return; // see what movement it is doing int dy = rising? -6: 6; if( … |
| | I have designed the jasper report in iReport and integrated it with jasper server. It works perfectly. But I am facing problem with my next requirment. I need to integrate the same report with my jsp application. I meant I am not getting how to integrate this report in eclipse … |
| | Hello all, I am working on assignment for class and I thought I had this one but something is wrong. This is an inventory control program that needs to display 7 items with the item number, name, number in stock, price and value. The program works for item 7 but … |
| | Hello, My Toshiba Satellite Laptop has horizontal lines running across the screen upon start up. I can not see my desktop underneath the lines. The problem was intermittent, and is now happening daily. To stop the lines and display my desktop on the screen, I have to swing my laptop … |
 | i am lerning advanced java so while practising the jstl topic i get this error on the eclipse browser... i had deployed the "jstl1-2.jar" then also this error is comming can anyone help me to find out what is the reason behind this HTTP Status 500 - The absolute uri: … |
| | The system is able to find grade for each course based on final marks, calculate GPA, Calculate CGPA. Methods (menu); i. Input matric_number, name, coursecode, credithours, semester, final marks for each subject. You may use text file ii. Calculate GPA and CGPA for each student. iii. Search a student record … |
| | hello.. can php and java script exchange data??  |
| | hello can somebody write a code for this array list in java I want the output as required there is a array list of 1,2,3 and to this {1}-->{4}-->{9} = {1,4,9} , {2}-->{5}-->{10} = {2,5,10} and so on {1,2,3} {4,5} {9} {10} {6} {11} {7,8} {12,13} {14,15} output : {1,4,9} … |
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