32,199 Topics
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| | I'm using Eclipse and when I try to build the JMS example included in j2ee tutorial, it return a NullPointerException at this: [code]connection = connectionFactory.createConnection();[/code]. Here's the code of that example: [code]public class Producer { @Resource(lookup = "jms/ConnectionFactory") private static ConnectionFactory connectionFactory; @Resource(lookup = "jms/Queue") private static Queue queue; @Resource(lookup …  |
| | What I'm trying to do is to take 7 of the scores from judges and discard the lowest and the highest score then average five scores that remain after. I got to where I can get all of the scores, but I have no idea how to take the lowest … |
| | Hi guys, I am writing a small application which needs to load some images, and other resources. I am currently trying to find the best way to package these resources in my application. I have looked at some examples, I but I have been having trouble understanding them, and many … |
| | Hello, I need to send messages to Android phones through P2P on 3G connection. Sending and receiving works perfectly on lan ip addresses(on wi-fi) but not on 3g or 2g. On 3g I send a message but it never appears on the other end of the line. Can anyone tell … |
| | Can I ask for some advice / help please, I am writing a UI that upon the user making a selection from a drop down list it then populates details about the selection in text boxes. I am writing this as three classes the main class, the UI (User Interface … |
| | Design and implement an object-oriented program describing two kinds of BANK accounts, [B]FixedFee[/B] and [B]ChargeableFee[/B], that differ in the way that fees are charged: • FixedFee: There is a fixed £5.00 fee at the end of the each month • ChargeableFee: Each withdrawal costs £0.50. The total fee is calculated … |
| | [CODE] import javax.swing.JOptionPane; public class Test1 { public static void main (String[] args) { // Method 1 Test3 method1 = new Test3(); // is this the method to call Test3()? JOptionPane.showMessage (null, method1 // Method 2 JOptionPane.showMessageDialog (null, Test3()); // Method 3 JOptionPane.showMessageDialog (null, Test3.toString()); } } class Test2 { … |
| | [CODE]import javax.swing.*; class Month { public static void main(String[]args) { String value=JOptionPane.showInputDialog(null,"Enter Month Day and Year"); if(value.length()==10) { char Month=value.charAt(0)+value.charAt(1); char Day=value.charAt(3)+value.charAt(4); char Year=value.charAt(6)+value.charAt(7)+value.charAt(8)+value.charAt(9); JOptionPane.showMessageDialog(null," "+Month+"/"+Day+"/"+Year+""); } else { JOptionPane.showMessageDialog(null,"INVALID INPUT!!"); } } }[/CODE] Hello i need help about combing the charAt()'s for example i would input 05/05/2010 i want … |
| | hi there. Just wanna check if I am coding this wrongly, [CODE]int sumOfVotes = 23 int howlong = 94 double SimPercent = ((sumOfVotes / howlong) *100);[/CODE] Shouldn't the answer, SimPercent, be 24.4? Tks! |
| | Hi, I got a compile error of incompatible types - lang.object is found but int expected on line 21. But when i put int in front of square, it says .class error:/ P.S. I didn't write everything here, I got some codes from other programs:P [CODE]import java.util.ArrayList; /** A magic … |
| | Hello everybody; m screwed by searching, and dont get any satisfactory material, i want to know that, if i have a button of NEXT then how it will close that GUI and open the new one from another class?? kindly help me  |
| | Hello, everyone, Next semester, I will be taking a course in Java programming language, and was wondering if anyone knew of a good IDE that runs in the Red Hat/Fedora environment. (Preferably something installed through YUM.) I tried a Google search on this, yet the only thing I seem to … |
| | i need to write a code that will download an excel file from a website every time it is ran. what im trying to do is automatically import real time electricity rates into excel. im a beginner in programing and am seeking help for my senior design project. Thank you |
| | i want to download a file from ftp to my local machine using java code. Can anyone help me out pls?? n provide the jar file used in the code. |
| | hello; i have gui on which i have a button of ADDMEMBER and this is in my package of Member; now i want to open another gui from another package of LIBRARY; how i will do it?? i have searched it alot kindly answered me .... Thnx |
| | I have this recursive method that counts the amount of negative numbers that lie in the array called "NumArray" [CODE]public static int countNegative(double[] NumArray, int startIndex, int endIndex) { if (startIndex == endIndex) { if (NumArray[startIndex] < 0) { return 1; } else return 0; } else if (NumArray[endIndex] < … |
| | I'm trying to evaluate postfix expressions but i cannot get it right. I always get the result value as 0 and in my evaluate method it keeps saying my num1 num2 and result have not been initialized. Any help is appreciated. [code] package collection; import java.io.*; public class Postfix { … |
| | Hello, I'm having trouble translating an algorithm. I'm not sure I coded bits of this correctly, but I'm certain that I have no idea how to compare an item with a node identifier (cannot apply > operator with T,T) but since this is an insert sorted method rather than insert … |
| | So I'm suppose to create some code that will perform some methods in recursion. Here's the prompt: [I]Assignment #9 will be the construction of a program that reads in a sequence of numbers (not necessary integers) from standard input until 0 is read, and store them in an array (including … |
| | Hi Guys, I'm trying to have the user enter an integer than an outline of a pyramid would be printed on the console. I just can't get the last line to print out with "*" all across. So say a user enters 5 I need the output to be: [CODE] … |
| | Hi. I'm new to this forum and to programming in general. This is my first programming class and it is in JAVA. I have been doing alright in the class, but am really struggling with this weeks program assignment. If you could help me out at all I would really … |
| | write a public class called IfElseDemo. Create a Method called go [I][B]that takes the args String array from the main method[/B][/I]. in that method create an if/else block that looks at the first element of the array and uses the string equals method to determine the output. if it contains … |
| | Well I am now starting a new program and it evolves get the users height, weight, age and then calculating it into hat, waist, jacket sizes. I have to have four made methods in it also. One for each clothing size and on for asking the user if they want …  |
| | Hi, I need help in creating a never ending array using java. It should basically work like and ArrayList but should be done using arrays. |
| | Hello. I have been reading some stuff on the action command pattern. ever heard of it? More inportantly, Do you understand it? Because I do not. although I would like to ask if the following class could use the command pattern as aposed to 'if" or "switch" statements. I understand … |
| | To code pretty much makes a grid of a check board. However I want to modify it so if I click on any cell of the grid of the checkerboard it will display a red circle. If I click on a cell that already has a circle, it will remove … |
| | Hello everybody! I have to Questions to ask please: 1) How can I find the maximum value in a single linked-list recursively? this is what I tried to do: int findMax(int key){ Node max=head; while (max != null){ if (max < max.getKey()) return(max.getNext()); } } it ends up to an … |
| | The task is to be able to move the alien right, down, and left. So far all i can get the alien to do is move right and down. I need to get it to be able to move left. Can you help me please? import java.awt.Graphics; import java.awt.Image; /** … |
| | Hello Members, Can anyone recommend any easy-to-use and free Java Script IDEs? Thank you!! sciprog1 |
| | Tell me if this makes sense structurally. I have a final this week and this homework will not be graded till after the final. I was just curious if I have as firm a grasp on this as I think I do. [CODE]public class account { private int id = … |
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