31,001 Topics
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| | Hi This app is supposed to let a person draw depending on their choice of Shapes and color. I cant figure out what is going wrong. The colours and shapes barely work and the mouse position is not showing up at all. Mouse listener that tracks mouse position seems to … |
| | Hi. I was wondering if someone could explain to me how to make some new node point to the first element in a list.  |
| | Hi. I need help with my size method. I am using a single-linked list. I tested my code and it returns 0 all the time. /** This method returns the size of the current list. <br> * If the current list has no elements,it is empty. <br> * * @return …  |
| | This a question please schools grades ------- -------- havard 90% with this table, i want to select the information in each column concatenate them and ouput the results in a textfeild. sample output = havard/90% so can you declare a column in mysql as a variable in java? if yes … |
| | I have the following code that prints out something like a database using a velocity engine and the output is printed to a console. Though what I'm asked is to generate HTML code using a Velocity template. The **Velocity Test Class** import java.io.StringWriter; import org.apache.velocity.app.VelocityEngine; import org.apache.velocity.Template; import org.apache.velocity.VelocityContext; public …  |
 | First, just to clear this up, I did not post this is the wrong place. I know the difference between "Java" and "Javascript" I'm working on a project where I want to allow a simple, no intense programming required, way for users to create custom functionality. This is a simplified … |
| | Hello, In the following programs, I am trying to add multiple clients. The Client program remains unchanged. For the Server program, I am using a thread (custom class implements the Runnable interface) to open a new socket and process every client request. My questions follow the programs. **ChatServer.java:** import java.net.*; … |
 | I just begin studying Java programming language and I want to solve cubic equation, but I do not know how to solve it and count the cubic root in java. Could you help and guide for me, please?? Thank you so much!  |
| | Hi. Everyone. I have a single-linked list and I need to implement an add method. I need to traverse the list (it needs to be in increasing order) and place the parameter object inside. There won't be duplicates. How do I go about doing this? public void add(G element) { … |
| | Instead of using synchronization, I used AtomicReference as a substitute: private AtomicReference<HashMap<String,String>> a = new AtomicReference<HashMap<String,String>>(); public String initPool(HashMap<String,String> latest){ HashMap<String, String> old = a.get(); if(old!=null){ Set<String> key = a.get().keySet(); for(String val: key){ if(!latest.containsKey(val)){ a.get().put(val,latest.get(val)); return returnObj(val); }else{ return returnObj(val); } } }else{ a.compareAndSet(old, latest); return null; } return null; … |
 | hello friend i like to make program in which user can selecte product and they can choose on e or more product by clicking add button now i want to save this firstly temporary all selected product when they click on add button and when user click on submit it … |
| | Hi, i just want to finish my j2ee application that have to receive many sms from mobile users of network operator and store these on database. I try to google it but i found nothing about this. Please, i just need an orientation step by step (Excuse me for my … |
| | Hi all, I have been told that variables containing objects are basically just references to a memory locations that contain the object data. And doing something like this: TestObject o1 = new TestObject(..); TestObject o2 = o1; would make a new variable o2 that will simply point to the same … |
| | Hey guys I had an assignment to recursively write the Towers of Hanoi then test it. I did not have too much of an issue getting the program written But I am not sure what the book means by test the efficiency do they want the number of moves my …  |
| | Hello, im having problem with my output =/ Everytime i run my program is not giving me the right output so, this is my assaigment. Consider a class that keeps track of the sales of an item. An object of this class will have the attributes: Number Sold Total Sales … |
 | I am having a problem deleting nodes from my Binary search tree. What I have so far does part of what it is supposed to do. I read in an input (paragraph of text) to create the tree (organized via ASCII character values). I make it, then print out all … |
| | Hi, I am working on a program that prompts the user for answers to a quiz. The answers can only be a, b, c or d and they are saved to an array which I later compare to my answer key array. Below is the method I have written to … |
| | I saw a tutorial from a site where it showed the use of `ArrayBlockingQueue` as a thread-safe concurrent data-structure . Just for learning purposes , i tried to build something similar using synchronized and wait-notify methods in java. I'm hoping someone could guide me to some improvements and point out … |
 | hey fellas I m new to mobile agents please help me in developing addition program in aglets. Thankyou . |
| | Hi everyone, Hope u all in good shape. I'm doing a simple project integrating mobile agents using aglets with intrusion detection system using snort., all these are done with linux fedora core 5 platform. The basic idea is, when snort detect an intrusion, an aglet will read the log file … |
 | Hello dear friends I am developing an application in java and in part of it i need to implement RSA encryption alogorithm that can encrypt any form and size of files ... can someone please guide me to an implementable code of RSA ? |
| | how can i create this pattern in a java loop with the use of input. for example input is x = 5 y = 6. this will be the output. ***** * * * * * * * * ***** I've tried different code but it gets me to full …  |
| | import java.io.EOFException; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.io.Serializable; import java.util.ArrayList; import java.util.Scanner; class Record implements Serializable { int roll; String name; public void setData() { Scanner scr=new Scanner(System.in); System.out.println("Enter Roll Number: "); roll=scr.nextInt(); System.out.println("Enter Name: "); name=scr.next(); writeData(); } public …  |
 | How do I retrieve image saved as a blob from oracle database please kindly help out. |
| | Write a Java program that will allow a user to calculate interest on a Bank loan. The program should i.Display Bank’s name and loan types available (at least 3). ii.Accept user’s choice of loan iii.Ask for user’s account number and verify. iv.Display Account name associated with account number to confirm … |
 | Hi Please help me in this problem. I want to run xml request by java code without using soap ui, please suggest me is it possible in java? how can i implement? |
 | i have a java client and c# server the server code is static Socket listeningSocket; static Socket socket; static Thread thrReadRequest; static int iPort = 4444; static int iConnectionQueue = 100; static void Main(string[] args) { Console.WriteLine(IPAddress.Parse(getLocalIPAddress()).ToString()); try { listeningSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); //listeningSocket.Bind(new IPEndPoint(0, iPort)); listeningSocket.Bind(new IPEndPoint(IPAddress.Parse(getLocalIPAddress()), … |
| | Hello, All. I'm a beginner with Java writing and would greatly appreciate a hand with the problem below: A student has decided to fly his remote controlled airplane. The airplane has about 12 minutes of flight without any extra weight. For every 1/2 of a pound added, the lifetime of …  |
 | I have 5 image files that I wish to incorporate or embedd inside a program. I am using netbeans and I have created a directory in the files table just under the database directory (I have embedded databases) with the 5 files inside them. For good measure, I have also … |
| | import java.awt.*; import javax.swing.*; import javax.swing.JComboBox; class grid extends JFrame { String[] Sex = {"Male", "Female"}; String[] Day = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31"}; … |
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