36,051 Topics
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| | Hi everyone! I'm new here this is my first post and woe is me its a call to anyone willing to help me! I'm in an introduction course to java at school and I have programed a little in the past, but nothing to write home about. Today my instructor …  |
 | Dani would be possible to rename JSP section to Java Web Development? |
| | This is my first attempt at coding. I am completely frustrated and need any help you can give me. I am supposed to take the values in the main method and in the next 2 (these are the ones i am trying to write from scratch) make the values in … |
| | Hello guys i am solving last years exams for practice when i stepped over this quiz. I have been fighting it for 2 hours but cant solve it. I must fill in the blanks so the program makes sense and i know its an interface , a class and a …  |
| | I want it to skip any lines read that throw an exception so I store the lines with errors in an ArrayList. But when it goes through when it gets an error, it will not skip the line and give same error and keep repeating. [code=java]/** * */ /** * … |
| | problem with JTree.when i drag the icon to the editor the standard tree with its default values showup.but when i go to properties no MODEL to create the tree is there. this not really a java question for a forun like this.however, if by chance you do have an idea … |
| | i am trying to retreive the contents of the table in my databse into a html form using servlets in tomcat. here isthe code: [code] import java.io.*; import java.lang.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*; public class ServletusingData extends HttpServlet{ public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException{ response.setContentType("text/html"); … |
| | Please somebody help me! I`m a beginner and want to learn web designing. I want to khow taht is there any diffrences between Java & JavaScript if yes which one of them is better for me I have learned just C programming language. |
| | i want to know how to send sms from a java program, so far i am aware that you will need a sms gateway, but i dont know from at which point to start coding .... i am an absolute beginner, and i please help me with step by step … |
| | can anyone plz help me. i m not able to compile source code.the problem is javac not recognised as internel or externel command.  |
| | Hi, I wrote a simple Java program that allows changing the background color of itself by clicking on the radio button, like this: [code] import java.awt.*; import java.awt.event.*; class Colors extends Frame implements ItemListener, ActionListener{ Label lblTxt = new Label("Choose a color:"); Label lblInform = new Label(); CheckboxGroup cbg = … |
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| | I am trying to make a table of all the ASCII characters but am having some trouble. I have all the characters printed in a list order, but need to make it into about 10 columns across. Any help is really appreciated. Here is my code so far...[CODE]import corejava.*; public … |
| | Hello, I am new to java with some experience in C++. I am trying to write code that reads two different times and displays the difference in hours and minutes. 0 is midnight and the input should be in 24hr format. This program should work even if the first time … |
| | So I have been looking around and have not been able to find an answer to this. The program is for the most part complete and runs with one exception. When I enter "stop" it still runs through the program before exiting (i.e. after I enter stop it still asks … |
| | Hello everyone. I'm having some trouble with a game I recently made for a class. It's a beginner's Java class, so the teacher didn't mind the problem, but it's been really bugging me. My game is a Tower Defense, but it blinks every time the enemy moves. Rapidly blinks. My … |
 | anybody out there please help me out fix these bug in my code. i really couldnt figure out what's wrong with my code. input should be in a string, and the output should tell wether its a palindrome or not please![code] import java.lang.*; import java.util.*; import java.io.*; public class istak … |
| | Whats up guys, I'm writing this java program and I'm having trouble with Strings. Does anybody know how to write the following methods? public void bubbleSort() //sorts the array strings using Bubble Sort Algorithm (ascending) public void selectionSort() //sorts the array strings using Selection Sort Algorithm (ascending) public void insertionSort()//sorts … |
| | how do i read character by character from a text file?I need to check for "\n" and split the file on it. for eg: I am a girl.I livein acd. My name is sdljnl. usoihuid. So finally i want to delete the 1st msg(line) from thefile so that the file … |
| | Hey guys im making a simple program. I have a while loop that continues while the bool quit ! = true. I am trying to test that in a statement like this: [CODE] String userdecision = ""; while (quit!=true){ //start while System.out.print("Would you like to continue with another transaction?"); [B]userdecision=in.next();[/B] … |
| | code:: [code] import java.io.*; import java.util.*; public class Global{ public static int flag=0; } interface filebackedfifoqueue { void put(String msg); String get(); } public class trying{ public static void main(String args[])throws IOException{ int ch=1; String msg; msg = new String(); while(ch!=0) { BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in)); System.out.println("\nMenu"); System.out.println("\n0.EXit"); System.out.println("\n1.Publisher"); System.out.println("\n2.Subscriber"); … |
| | Hi everybody, I want to have a login form in Java, which comparing the username and password, according to MySQL database data, so I have the following code, just don't know where to add the select statement and how verify the username and password from MySQL with the JTextfield of … |
 | Hello Everyone, Few days ago, There was active thread on creating own DBMS in Java. Its not an easy task so i decided to create Object-Relational Mapping Framework and i have done so. I have tested all methods and its working perfectly. Now i have decided to make it available … |
| | Hello, I'm creating a program that involves coloring an image thats is gray scaled and has a transparent background. How do I do that? |
 | Which is in higher demand in the job market right now??? |
| | I am doing a Java project and in my gui I want to use Buttons. I want to put a class' internal parts code as a button action. Because the class Throws Exception when I copy the contents of the class under the button definition I encounter unreported exception error. … |
| | hi Frends, I am a NetBeans user, I show an error in My project when i click on Design view of JFrame. Error is:-"The File Formate is Not Recognized" this is my project database's JFrame. i can't see the design view but ican write code in it. In code window. … |
| | hi guys, how to make frames, or windows in a shape of circle or something not in regular rectangular?? Thanks in advance. |
| | I have two strings s1 and s2. I have to check what is the largest occurence of letters in s2 that are in s1. For example: s1="xyz" s2="abxyryxzycx" it would then return 4 since "yxzy" is the largest substring with all the letters in s1. It has to be recursive. … |
| | Hi All I've created a web page where I'm trying to pull data from the database. My requirement is to populate a combo box from the database automatically, i.e. as and when the db updates, the combo box needs to get updated. I have heard that it's possible with Ajax. …  |
| | How do you convert a character type into a string type?? |
| | [CODE] import java.io.*; import java.util.*; public class Palindrome { public static void main(String[] args) throws IOException { char letter; String reversed,NEW; Stack S = new Stack(); BufferedReader stndin=new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter a word: "); String word=stndin.readLine(); for(int i=0; i<word.length(); i++){ letter = word.charAt(i); //this line should cut the 1st letter … |
 | Hi! I am trying to initiate a client-server talk but for some reason it is not working. The server starts running, but when I start the client nothing happens. Please point out the mistake in my code- Server- [code="java"] import java.io.*; import java.net.*; public class MyServer { public static void … |
| | I have a Set that contains different random lines from a text file, now I'm new to Java so I don't know much about the methods available but I have tried using the java.util.Set.toArray() method but it returns an Object[] than can not be sorted. Is there anyway to do … |
| | hey! I`m a beginner in Java and I want to write a program that use try and catch method to send a msg if the average it calculate is not in [0-20] I have already write this code but it always print 0! what is wrong with my code?!!! [ICODE]using … |
| | I made this applet for my APCOMPSCIA class, it due tomorrow but I cant get it working. I need to show the animation of a sort, but it just does sort once that it, please help. I will be very great full. [CODE]import java.applet.Applet; import java.awt.*; import java.awt.event.*; import java.util.Random; … |
| | can anyone tell me the code how to create a textpane with scrollbars inside a tabbed pane.....and i should save the text in a file on button click.... |
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| | [code=java] import java.util.Scanner; import java.util.regex.*; import java.io.*; import javax.swing.*; /** * A program that parses a user-supplied URL */ public class URLParser { public static void main(String[] args) throws IOException { Scanner scan = new Scanner(System.in); PrintWriter out = new PrintWriter(new FileWriter("D:\\cs2200\\lab8\\URLs.txt")); String input=""; // Everything works the way I … |
| | Hello, I am creating a client/server application that verifies math equations for addition, subtraction, and division. I think I just need someone else’s eyes to possibly see where I am going wrong with this. Everything seems to be working fine except for one variable. This is the String serverAnswer variable … |
| | I have all my code for this. I have the code to read a txt file, write a txt file, convert the infix to postfix and evaluate it. I am now just having trouble putting it all together. I need it to read the text from a file convert each … |
 | [code=java] import java.awt.EventQueue; import javax.swing.JFrame; public class tatat extends JFrame { private static final long serialVersionUID = 1L; public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { public void run() { try { tatat frame = new tatat(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } public … |
| | [code] import java.io.*; import java.util.*; import java.io.IOException; import java.util.Scanner; public class Lab { public static void main(String[]args) { System.out.println("MAIN MENU"); System.out.println("<1> Bahasa Melayu"); System.out.println("<2> English"); System.out.println("<3> Exit"); System.out.println("Your selection (1,2 or 3)?"); Scanner read = new Scanner (System.in); int selection = read.nextInt(); if(selection == 1) { System.out.println("Hello, apa khabar?"); } … |
| | Implement a subject scheduler using the topological sorting algorithm. The program shall prompt for an input file containing the subjects in the set and the partial ordering of subjects. A subject in the input file shall be of the form (number, subject) where number is an integer assigned to the …  |
| | [CODE] import javax.swing.*; public class A { public static void main (String args[]){ String ask = JOptionPane.showInputDialog("Enter"); if(ask.equals("hello")){ System.out.println("ok."); main(args); }else if(isRepeat(ask)){ System.out.println("Invalid,string has been repeated."); System.exit(0); } } public static boolean isRepeat(String ask){ if(ask.equals("hello")){ return true; }else{ return false; } } } [/CODE] Hello, I am having problems with …  |
| | i cant figure out what's wrong with my code. can anyone help me pls? [code] import javax.swing.*; import java.awt.*; import java.awt.event.*; public class MyGUI implements WindowListener, ActionListener { public void windowClosing(WindowEvent e) { System.exit(0); } public void windowClosed(WindowEvent e) { } public void windowIconified(WindowEvent e) { } public void windowOpened(WindowEvent … |
| | In a queue, where elements in integers are added, how do i do this: Inside the queue: 1 2 3 5 6 8 when I want to add a number, say 4, the output should be like: 1 2 3 [B]4[/B] 5 6 8 in which it inserts in between … |
| | Hi, I'm trying to program Tetris. The thing is, I can't seem to get the Keylistener to work in the JApplet, and I have no idea why :( Here's my code: [CODE=java] import java.util.Random; import java.awt.event.*; import java.awt.*; import javax.swing.*; /** * Class Tetris - write a description of the … |
| | Hi, I'm working on an algorithm that solves a maze from the inside, and seeks out 1 of the 4 exits on the sides, and after getting 1, it goes to the next until it has them all. The maze is always 22x22, and you only have 400 steps. I … |
| | I assume the drowpdown/layer menu is javascript simply because it has to wait until the entire page is loaded so that I can see the sub-options... I really wouldn't want it to be redone but sometimes at work I have slow internet and loading the page just pisses me off …  |
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