35,618 Topics
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| | I have created two socket file,But it is not working in proper way. please let meknow where the porblem is. TCPClient.java import java.io.*; import java.net.*; class TCPClient { public static void main(String ar[]) throws Exception { String fromserver; String toserver; Socket clientsocket=new Socket("localhost",10000); BufferedReader infromuser=new BufferedReader(new InputStreamReader(System.in)); PrintWriter outtoserver=new PrintWriter(clientsocket.getOutputStream(),true); …  |
| | dear all, I will stuck with one problem.I have one java program in which frame will be there. I am fetching some data from database and i am selecting background image from dialogbox. Now i have used BuffereImage class, i want to print that image with text through the printer. … |
 | I want to compare between nodes in BST to find the highest salary and im using recursion function in implementing my BST. Below is the question: A company needs to keep all records of its employees. Employee record should contain employee id(4 digit integer numbers), name, department, salary and an … |
 | Hi.. My java desktop application runs every time the computer starts up and runs as long as computer is ON. It monitors all the activities and interacts with database more often and will tell me some updates by looking on the internet at regular intervals etc..etc.. So what I usuallly … |
| | how assign a none static var to a static var in Java/Android? String top5=scoreSaveReturn2(this.x); public static String totalPoints3;//=top5; CannonGame.totalPoints3=top5; // gives error here In a Canvas game if we have a class like: public class CannonView extends SurfaceView implements SurfaceHolder.Callback how transfer from this a var value to this public …  |
| | Hello, I'm having an issue with set and get method. When i clicked on a button, i set index as 1 however when i use the get method to get the index, the index is returned as 0. I want to call a method if the index is 1. here … |
 | i have to create a queue where the dequeue operations will be random. that is , a random location will be chosen, and deleted after returning the data stored at that location. i was going through the two underlying datastructures that im allowed to use **:** linked list , and … |
 | Hi, I've been trying to send a `BufferedImage` through a socket. I can get it to work once, but when I try to get another screenshot, it fails. The server usually gives me a `java.lang.IndexOutOfBoundsException` at `ImageIO.write(capture, "png", client.getOutputStream());` Server Code: //already told server i'm expecting an image try { … |
 | I'm learning about threads and Producer-Consumer model . I haved copy-paste the code from a book and i have a issue. When I run the program sometimes the Consumer gets the next number from the buffer even if the producer hasn't put nothing in the buffer. Example : Producatorul a … |
| | I am making an ABACUS MODEL program which adds counters to pegs. The program compiles fine but when i use the test that was issued to me (as pictured) it appears as though my program does not work as intended. I don't know if anyone will be able to help … |
| | The above code computes the value of a mathematical expression supplied at command line by using the concept of converting infix to postfix,then evaluating the postfix expression. Any comments are appreciated. |
| | Here's a simple thing that I can't find a simple solution for - so any suggestions will be very welcome... I have a `Map<String, MyClass>` and if it has more than 1 entry I let the user pick a MyClass instance by displaying the keys. No problem there. If it … |
 | hello i want to stop the music after pressing other song i tryed much different ways of doing it but no results please anyone help me i have this code ... package passwordsaver1; import java.awt.Dimension; import java.awt.Toolkit; import java.net.URL; import javax.sound.sampled.AudioInputStream; import javax.sound.sampled.AudioSystem; import javax.sound.sampled.Clip; import javax.swing.JOptionPane; /** * * … |
 | Hello generous java coders!I am really in a desperate situation now. I have a working gui code here: import java.awt.event.*; import java.awt.*; import javax.swing.*; public class CountdownTimer extends JFrame { JLabel promptLabel, timerLabel; int counter; JTextField tf; JButton button; Timer timer; public CountdownTimer() { setLayout(new GridLayout(2, 2, 5, 5)); promptLabel …  |
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| | basically i am working on a project for uni, which is to create a form of an abacus model. - peg_array[] stores the number of counters/beads present in each of the pegs(lines) of the abacus. i am trying to use 2 boolean methods: "boolean removeCounter(int thisPeg)" "boolean removeCounter(int thisPeg)" thisPeg … |
| | Hi I am trying to write a binary search function to search for a specific character in a character array sorted in ascending order. Whenever I run the code though nothing happens, there are no errors or anything, just nothing happpens until I terminate the program myself. Below is my … |
 | 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, well this suddenly surprised me .. dunno why ... i was trying to solve the binary-tree implementation ... where i noticed using root.left = new node bla bla My question insert(Node root,int value) root.left = new node(null null value) Etc ... The function doesnt create a copy of the … |
| | Hello i am trying to use cookie at my site. I used this code for set the cookie try{ Cookie cookie1 = new Cookie("thesiteid", Integer.toString(site_id)); cookie1.setDomain("localhost"); cookie1.setPath("/"); cookie1.setMaxAge(24*60*60*365); response.addCookie(cookie1); System.err.println("Set cookie"); } catch (Exception e){ System.err.println("Error in creating the cookie: "+e.getMessage()); } The problem is that is not working at … |
| | import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Burger extends JFrame implements ActionListener { JLabel lblForAll, lblBelow, pic, pic1, pic2, pic3, pic4, pic5, pic6, pic7; JRadioButton rBtn, rBtn1, rBtn2, rBtn3; JCheckBox cBtn, cBtn1, cBtn2, cBtn3; JTextField txt, txt1, txt2, txt3, txt4, txt5; JButton btn1, btn2; ButtonGroup btnG; int ham=25, egg=15, … |
 | pls help me the coding.. |
| | can i change toggle button's state to another (play state to pause),by clicking another button(stop) |
 | any one help me???????????????????????????????? how to convert text file to kml file using java??? |
| | Hi, i'm making a java program, and I started making the gui with a `JTextArea`, and tried to add a font (`Consolas`) and It crashes with a "divide by 0" error. It works fine on windows, and if you comment out the `setFont` line.. import javax.swing.*; import java.awt.Color; import java.awt.Font; … |
| | Please help me. It goes like this: Write a program that will determine the income of an employee. An employee is either a part-time or a full-time employee. A part time employee's gross income is computed as the product of his/her hourly rate and the number of hours worked. The … |
| | My homework goes like this: Write a program that accepts as many integers the user wants to input. Determine the highest and lowest numbers and subtract all other numbers from the highest number. example: numbers to be entered: 6 number1 :15 number2:20 number3:29 number4:38 number5:12 number6: 42 Output: Highest: 42 … |
 | I need to write a code with a constructor class in order to see the whole phonelist using an array that reads from a document txt, able to add a person and phone number, search just one person in the phonelist and able to modify their phone number. here is …  |
| | I need to input a name in the JMenuItem(employee name) using JOptionPane, I used this statement (JOptionPane.showInputDialog(frame, "Enter Employee Name");) and I try using a string variable but nothings happen. import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.awt.FlowLayout; import java.text.MessageFormat; import javax.swing.table.AbstractTableModel; public class Cs extends JFrame implements ActionListener { …  |
| | I am having a problem to understand how class inhertance works in Java.. Now I want to get information from a class to another and let's say we have class A and class B class A contains a string an int and a byte class B contains a String and … |
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