36,051 Topics
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| | package battleship; import sun.audio.*; import java.io.*; public class Sound // Holds one audio file { public void playIntro() { AudioStream bGM; try{ bGM = new AudioStream(new FileInputStream("intro.wav")); AudioPlayer.player.start(bGM); } catch (IOException error){} } } I have that on one of my games and the music doesnt run, any help? If …  |
 | Hello, I am trying to access a binary file with scanner functionality. I am trying to extract integer, long double value from the binary file. The binary file formation is as follows The binary file is in little Endian and is structured as follows: * * <ul> * <li>1 integer: …  |
| | Hi everyone I am trying to make a project "Remote Administration" in which i have to connect with computer using RDP I am beginner of android and I must submit this project soon so, anything you can help with?? i don't want source codes please tell me what to look …  |
| | Hi All, This is Bhanu Teja M. I just wanted to write a online quiz application, which various people can participate in quiz from different locations. For this, i need to maintain a single screen for all users and maintain and display the same data,status across the all participents. Can … |
| | i was test collision between ball and box. i have a ball and long rect(platform) on screen. the collision part works fine. but i want to test where the ball is touch the platform. so if ball touch the ball from left or right or top or bottom. but when …  |
| | Hello Friends, I am having trouble with a homework assignment and was wondering if you would please take a look at it for me. I have to write a program that receives a prefix expression. Then it calculates and displays the result. It does this by using a stack to … |
 | I'm currently try to write a program as below : A college would like to automate managing courses offered to students. initially only three courses are involved. each courses has a code, a name, students enrolled, a current number of student, a maximum number of students allowed (quota) which is … |
 | can anyone help me understand this code part ? this is about binary minimum heap , ie root has the lowest key.. the part of the code im trying to understand checks whether the subtree ( of a certain minHeap pq[1..N] ), rooted at k is also a min heap … |
 | Hello all. Currently I develop PHP website, and I do simple java programs. Since I will continue learning more and more java, I decided to learn JSP/Spring MVC (Don't really know how Spring MVC Framework uses JSP, check next paragraph) combination of my web knowledge and the Java programming language. … |
 | This might be a very basic question but still I am not able to figure out why is the foll code giving stackoverflow exception in main?? public class HelloWorld{ public static void main(String []args) { System.out.println("Hello World"); Animal c = new Animal(); } } class Animal { Animal e = … |
| | I wrote a code to represent the factory design pattern as below: package com.factory2; public interface CreditCheck { Double creditLimit(int id); } package com.factory2; public class CreditCheckFactory { public boolean isAgencyUp(){ return true; } public CreditCheck createCreditCheck(){ if(isAgencyUp()){ return new CreditCheckOnline(); }else{ return new CreditCheckOffline(); } } } package com.factory2; … |
 | **I use Netbean Platform in learning coding in Java, but now it has gotten to a level where i need a server application to further my learning,but i saw Apache Tomcat and Glassfish server as part of plugins that came with my netbean, so i want to know what i … |
| | Iv been developing a parser using java, however due to testing on multiple machines i have errors now on one machine i corrected as the machine was using jdk/jre v1.6, and on my newer machine jdk/jre 1.7 The question i have is, what are the implications of using the String … |
| | Hi Friends, I have PSKC XML file.. That contains my Salt/Key,IV(Initialization Vector),Encrpted Data,password also. Now, I am trying to Do Password Based Encyption and Decryption Using PBEWITHSHA1AND128BITAES-CBC-BC Algorithm. It works,If i generate salt and IV randomly. But,it fails to work,if i dont generate it randomly... Instead of generating Salt and … |
| | i had a question but i am not sure what the problem is. if user keep right key down. than camera should move left.and my player should fall down bc there are two empty(sky,'0') under player. move camera. 2d map: (0=sky,1=ground,2=player) 0,0,0,0,0,0,0,0,0 0,0,0,0,0,0,0,0,0 2,0,0,1,0,0,0,0,0 1,1,0,0,1,0,1,1,1 int camera_pos_x = 0; int … |
| | My TCP/IP server socket is not accepting connections from other systems. When i try to send data from the client to server within the same system i see them working fine, Here is what i get by printing the stacktraces - Waiting for client on port 50000... java.net.SocketTimeoutException: Accept timed … |
 | Hello everyone, I am puzzled... when I run a JUnit test, there is no main method in the class and it still runs. Alo, a java/maven web app does not have a main anywhere. My assumption is that it is hidden somewhere on some class I somehow extend or something. … |
| | I am making a video poker game for my class assignment. I have the program running that gives out 5 cards. I don't know the easiest way to do this but say after card1 suit1 is dealt I want those values stored so card2 suit2, card3 suit3, etc.... cannot have …  |
 | Hello guys, I am currently doing my final year project on OCR. I will have to come up with chain-code algorithm as the recognizer. Any of you guys have sources or links that will lead me to the solution? I have googled much but I could not find a Java-based … |
| | Hi everyone! I am having troubles making the second IF statment execute in my code: Pattern dl_noise_rates_p = Pattern.compile("\\d+\\s(.+)\\s(.+)\\s(.+)\\s(.+)"); Matcher dl_noise_rates_m = dl_noise_rates_p.matcher(lineString2); if(dl_noise_rates_m.find()){ String s_dl_nr1 = (dl_noise_rates_m.group(1)); //checking for non numbers pulled in the regex if(s_dl_nr1 == "NaN"){ //| s_dl_nr1 == "NaN" | s_dl_nr1 == " NaN" System.out.println ("OMGOMGOMGOMGOMGOMGOMGOMGOMG … |
| | Hello! I am using for the first time the JTabbedPane. The problem that I have is that I want to apply the paint method only for the first tab, but it also paints the second one. How can I solve this problem? |
 | Hi, So i'm trying to write a program that will work like a credit card database. The instructions say to add a file with 10,000 names that was given to us and add it to our project file. a scanner is suppossed to read through that file and add each … |
 | I'm going through a netbeans tutorial on Java ecommerce located here: http://netbeans.org/kb/docs/javaee/ecommerce/setup-dev-environ.html When I get to "running the web project, step 1", I click the green run button in the NetBeans IDE. In my browser, it goes to http://localhost:8080/AffableBean, but no HTML is displayed. If I view the admin domain …  |
 | Hello Dont ask why but lets say I want to encrypt "hello" and the encrypted forum is "238324" I want to do: String avariable=dcrypt(238324); //avariable should now hold hello public string dcrypt(String encryptedtext) { //do decrypt stuff return descriptedtext; //decriptedtext should be hello } Basically thats what I want.....Dont care … |
| | Hi, Im trying to write a program that uses a .txt file to fill an arrayList of type Customer (A class that I made.) and then using that ArrayList to perform other functions within my Customer Database class. when I test my method, nothing is being added to the ArrayList …  |
| | I have written a code which used to send data that was saved in my mysql database, through ethernet using UDP protocol, everything worked fine until i sent fewer data(25 rows), when i started sending data in huge amount(100 rows) it used to display Java Result: -1073740791 and would stop … |
| | i want to set a collision on my tile map using getBounds function. level class int map[][] = { {2, 0, 0} {1, 1, 0} }; 2 = player 1 = ground 0 = sky i want to set collision so player cant go though ground. so he should fall … |
| | In my Advanced Data Structures class we have an assignment to implement a linked list using arrays. One array holds the data item, while another contains a reference to the next item. I'm not really sure about how to add/remove items. // **************************************************** // Reference-based implementation of ADT list using … |
| | Hi there everyone, I am having some difficulties getting a regular expression to work. I have a line of text with 5 numbers.I want to ignore the first number, and grab the other 4 numbers. Here is what the text I am dealing with looks like. 1681 12.33754513 7.066246057 6.079261254 … |
| | In main method which should I use? CarOwner owner = new CarOwner("Danni", "123456789"); or CarOwner owner = new CarOwner(); owner.setName("Danni"); owner.setPhoneNumber("123456789"); I know how to make both work, I can edit the class file to suit whichever way it is written in the main method. But what do people do … |
| | Hi, I have written coding for coverting jsp page to excel.It is working in IE browser after downloading file is saved with .xls extension .But in firefox browser i am trying to download then it saves with .jsp extension.any one pls help me how to solve this issue? here is … |
 | program for moving a car or object using button(start and stop) in applet and thread function |
| | Hey everyone, I am having trouble on this one practice problem. It is a question that requires another question I already completed to solve this one. The qusetion is "Implement a method allPerfect() that takes an integer parameter end. The method prints every perfect number from 1 to end. Use … |
| | I wanted to verify is this a good example of a flyweight design pattern: package com.flyweight; public interface Chemical { String getName(); String getSymbol(); Double getAtomicWeight(); } package com.flyweight; import java.util.HashMap; import java.util.Map; public class ChemicalFactory { private static Map chemicals = new HashMap(); private static ChemicalFactory factory = new … |
 | public class Jacobi{ // jacobi(a,n) public static void main(String[] args) { int n = 234567,a = 97770; if(n<=0 || (n %2) == 0) return (0); int temp, j=1; if(a<0) { a = -a; if((n % 4) == 3) j = -j; } do while (a!=0) { do while(( a % … |
| | I am tryn a currency converter using hash table. What is the technique to use to enble covert both ways. Ex: Dollers to Euro and Euro to Dollers . I can understand how to do it one way using currency as the hashKey and rate as Hashvalue. (I hope that … |
| | Hello, Could you please assist me i want to deploy this application as an executable file with the MYSQL database embedded. I have clean and build the application, the jar file is there but nothing happens. The database is stored on local host. Thank you  |
| | i recent been using my variables names like this boolean is_dead = false; turn out its not right. right conventions is boolean isDead = false; for some reason i dont like the 2nd one. may be bc i been using 1st one for so long. i was wondering is there … |
| | Hey, I need some assistance with an assignment that deals with Jframes. The assignment says "For questions 27 to 31, consider the following class: import javax.swing.*; import java.awt.*; import java.awt.event.*; public class A extends JFrame ( private Container c; private JButton b; private JTextField tf; ) Now for the questions: … |
| | Hello guys. I am getting this error when I run this file. Can any of you clarify what is wrong in the code? public class csector_node { public double [] relations; public csector_node() { relations = new double [8]; for (int i = 0;i < 8;i++) { relations[i] = new …  |
| | hi... i have 1 jsp form. my form includes 6 text boxes and 8 dropdowns. I want to insert the data of these textboxe and dropdown to Database. I am using mysql server 5.1.The problem is that when I insert, a blank screen appears. (Data in dropdown is retrieved from … |
| | i wrote a code to implement some basics of priority queue , but apparantly its not giving desired output. the code is implemented using binary heap as its data structure. i tried tinkering here and there , nut no luck... i want to display a given number of max or … |
| | Hi to all, I'm making one application for video control in firm...what's the best way to make application which have to access to webcam? There should be option for watching videos from more cams in real time...I read something on google and I found that Swing framework has some options … |
| | hi i try to create a new dynamic web project in eclipse indigo, tomcat 7 i am getting these types of errors: Errors occurred during the build. Errors running builder 'Faceted Project Validation Builder' on project 'mysql'. java.lang.ExceptionInInitializerError i have deleted the project and created new one and again i … |
| | **registerBean.java** public void onEdit(RowEditEvent event) { Connection con = null; PreparedStatement stat = null; ResultSet rs = null; try { Class.forName("com.mysql.jdbc.Driver").newInstance(); con = DriverManager.getConnection("jdbc:mysql://localhost:3306/db", "root", ""); stat = con.prepareStatement("update regtbl set fname=? where rno=?") ; stat.setString(1, fname); stat.setInt(2, rno); stat.executeUpdate(); con.close(); } catch (Exception e) { e.printStackTrace(); } } ** … |
| | les say i have a map: //my map is biiger but this is just a ex. int map[][] = {{1, 1, 1 1, 1, 1, 1, 1, 1, 1}, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}}; int camera_pos_x = 0; int camera_pos_y = 0; int camera_speed = … |
| | Hi! I recently started teaching Java to myself yesterday via TheNewBoston on youtube. I began working on a few programs from the programmingbydoing website but I'm stuck on this problem:http://programmingbydoing.com/a/gender-game.html It's a problem focusing on nested if statements. Here's my code!: import java.util.Scanner ; public class MainClass { public static … |
| | As part of my Uni course i have been given code to edit to create a MineFinder (mine sweeper) game. I have 3 seperate classes to create this game. But for now, my problem lies with this "MineFinderModel class... the tasks i am struggling to complete is as follows: > … |
| | Hello, I have build my application and now that I am trying to run the jar file by double clicking on it nothing happens. I tried to access it from my terminal(mac OS) using this line: java -jar "C:\Users\Me\NetBeansProjects\BS1\dist\BS1.jar" But get the following error: Unable to access jarfile Can anyone … |
| | hi friends im in need of the basic code for reading a video file as matrices in a frame by frame manner in java. can anyone please help me ? |
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