36,051 Topics
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| | i have a project ,and i don't know how to run it in netbean ide - i am a begineer in java2e - i got a project in which some notepad like screen is there when running -jar exe file - and a option is there for compile and running …  |
| | Can anyone see what's wrong with this piece of code? When I try to compile I get an error on the first line (line 3) "cannot find symbol, symbol : method split(char)" I have the delimiter btw as a public static final char in the same class. [CODE]private static boolean … |
| | This is my jsp code for saving back the data to .properties file after editing. i used 2 Linked properties as one LinkedProperties pro is to get the data from the path and the other one to get attribute (eg: id, name, age, gender etc.) from default .properties file so …  |
| | Basically what I want to do is add a prefix (input by the user) to be added on a chosen word by the user. Is that posible? I got stuck and don't know what to do.... Here's what I have so far. [CODE]// The "Prototype" class. import java.awt.*; import hsa.Console; … |
 | Guys i wanted to connect Java Application with MySql database.I have written a Java Programme.I have already created the database also.But it doesn't connect with the Database.This is my code.[CODE]import java.sql.*; public class check { public static void main (String[] args) { Connection conn = null; try { String userName …  |
| | My question is about looping skill overall. I am having problems with loops. Is there any book/tutorial/website about this particular skill in java programming to help me learn how to loop in correct/effective way ? I know how to write simple loops, I know structures of loops too. When I … |
| | Hello I want to make a GUI, and for it I need to use absolute positioning, since I want each element to have a precise position within my frame. I am making each element that makes up the frame by extending JPanels, so I'm building each block within the window … |
 | i have two array of chars of size 12 each having only 0's or 1's. what i am trying to do is that in for loop [CODE]for(i=0;i<12;i++) { int a=1starray[i]; int b=2ndarray[i]; int c=a^b }[/CODE] but every time c gets 0 only. iam not getting it why. can anybody help … |
| | Hi everyone, First off - I'm very new to Java so please be gentle. I'm having some problems with an assignment from school: [B]Input[/B] The input starts with an integer k indicating the number of words in the text (max 1000), followed by k words. [B]Output[/B] The output will consist …  |
| | I can add nodes to my JTree, but after expanding a node, I can not add any child nodes to that node, or at least they dont show on the screen? Actually I can use the .add(new DefaultMutableTreeNode("Label")); to add a node to a parent node, but the new child … |
| | I need help with a lab I'm doing. In this lab you have to show the number of odd digits a number has, for example the number 4135 would have three odd digits. I've already done a lab where it tells you if a number is odd or even but … |
| | I'm trying to write this program that'll generate 10 random values in a given range, store these numbers in a .txt file, and then read these numbers from the same file and display them on the screen with equivalent words. I've got to the part where im trying to read …  |
| | Guys i have developed a java desktop application.There is a jTable.I have already connected the MySql database also.I just want to bind the data of database to my jTable.In several tutorials i saw when right click on the jtable,get a dropdown menu and select the table contents and go step … |
| | Initially I was to design this simple program to have a file be read in and store 50 numbers in array1, and the last 50 numbers in array2, then calculate a total (array1 + array2) and store it in array3. But I need to change this program to utilize the … |
| | I have my two JTextFields identified in a GridLayout, but when I try to reformat them the stay as large as their positioning allows. I have tried to specify the size of the field but it never changes on the final product. Could this be because the GridLayout or something … |
| | I have a program in which tells me the highest number and the lowest number. ( i am using a loop for the highest and lowest) I need to get the second highest and second lowest. without an array i was wondering if i could find that within the same …  |
| | How to create reports in core java like visual basic 6.0 report |
| | Hello, I am a novice programmer and I was given the following task: write a Payroll class that uses the following arrays as fields : employeeId (holds 7 integers that are initialized, I placed them in my code below), hours and payRate (both are doubles and hold 7 numbers). I … |
| | Okay getting quite frustrated! I am trying to get an if statement to implement a pop up window when the user fails to enter any information in one of the JTextFields like fnameTF. Here the if statement but where do I place it to work in my program? [CODE]if (fnameTF.getText().length() … |
| | I would like to know how you can input information from one array to another. For example String A[] A[0]= 2, 54, 6, 7 A[1]= 434, 32, 45 A[2]= 34, 45 A[3]= 20 Where all that are in "A" are actually seen as strings, and you want to input this … |
| | Here I am again! I am working on the program below that is calculating payroll but am kind of lost on how to program the reset button after the net pay has been calculated. Any and all help would be greatly appreciated. Thanks. [CODE]import java.io.*; import java.util.*; import javax.swing.*; import … |
| | I am writing a program, but I cannot find what is wrong with the code. Only need to show one MP3, or an error message if there are any missing fields or an incorrect entry for seconds. It is not storing information about previous songs; it just display the current … |
| | Hi guys I really need help I recently purchased a Chinese phone which is giving me an error every time that i try to install a java app it says UNSUPPORTED MID LET so I was wondering whats that error and what I can do to fix my phone and … |
| | Hey guys! I've created this program that allows the user to get a .txt file from anywhere in the hard drive and it displays the contents in the text area. My question is: how can I edit my code so that it only allows picture files to be selected(jpg and … |
| | .contains seems to return true for most things, even if one or two chars match. Is there a way to make it more restrictive? |
| | Hi, I'm new to java but have some experience with C++ can anyone help me with a basic code to display inheritance? I'v chosen a Parent class Phone and a Child class Mobile and I want to simply use the display method from my parent class on the child class. … |
| | [CODE]package com.abc.text; public class StringProcessing { /** * Returns the number of non-null strings in the set. * If null or a zero-length array is passed in, then zero is returned. * If a slot in the array is null, then it is ignored (not counted). */ public static int … |
| | im new to java so if im doing some thing the wrong way please let me know this is the class that connects to data base and grabs all the info from colum 1 and colum 2 that part works now when i try to either make it a useable … |
| | [CODE] import java.util.ArrayList; import java.util.Scanner; import java.io.*; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.FileReader; import java.io.FileWriter; import java.io.PrintWriter; import java.io.IOException; import java.util.StringTokenizer; /** * Write a description of class Auction here. * * @Bong Suk Ing * @20/10/2011 */ public class Auction { private int displayPrice; private int increase; private int … |
| | Hi guys :D.. just wondering.. when I'm using scanner this is the code I use to ignore the case "to put in the do..while statement" [CODE]} while (choice.trim().equalsIgnoreCase("Y"));[/CODE] I've been looking all over the net. what code should I use if I'm using JOption.. can anybody please help me on … |
| | Hi guys, I'm taking a Networking & Internet Systems module... have little experience working with java and am trying to work through an assignment... hopefully you can help! I've been given skeleton code to complete for a program that acts as a simple email client that uses TCP/IP sockets to … |
| | i am wondering what is the problem here. here text.txt is the input file. any help will be highly appreciated. [CODE]import java.io.*; public class Main{ public static void main(String[] args) throws Exception { File f= new File("text.txt"); BufferedReader in = new BufferedReader( new FileReader(f)); String line = new String(); line … |
| | i am quite new to java i used to code in c++ but now we have to program in java which has not been taught. i browsed net but casn't get enough information this is my first code which i managed to get from net [B]i am using GNU java … |
| | I have the user enter a string e.g. subject of book using a scanner then a for loop, to print out all the books with the same subject to what the user entered. But I'm having a problem in that it will only print out the first occurrence. For example … |
| | Hi! I’m have been following the JAAS turrial: [url]http://download.oracle.com/javase/6/docs/technotes/guides/security/jaas/tutorials/GeneralAcnOnly.html[/url]. And the program works fine when I compile it from the command prompt in Windows. But when I try to compile and run it with eclipse it gives the error: Error: Could not find or load main class java. I think … |
| | This is the only part of my assignment that has problem. Can anyone tell me what's wrong? I debug it, it shows me NullPointerException... please give me a hint, i urgently need this to be done. Its due today. So, I am supposed to write a method captured that will … |
| | [CODE]public Node<E> remove (int index)[/CODE] i need to recursively implement this method. Node<E> nodes contain two fields, next (a reference to the next node in the linked list) and element (a reference to the data it contains) [CODE]public E element; public Node<E> next;[/CODE] Do not worry about the checking for … |
| | I am trying to write a program that kind of resembles and etch-a-sketch. I have the basis for it. I am having two problems: 1. When I draw a shape in the default black color, when I switch the color it changes the color of what I had previously drawn. … |
| | Hello all Does Caret Event only for one component only ? I tried to find example for more than one TextField which added with CaretListener,but cannot find one. Anybody know website or has example like I need ? I need to know how to detect which component arise the CaretEvent … |
| | A number is called a proper divisor of N if M < N and M divides N. A positive integer is called perfect if it is the sum of its positive proper divisors. For example, the positive proper divisors of 28 are 1, 2, 4, 7, and 14 and 1+2+4+7+14=28. … |
| | Hello folk i am a new member n i need Ur help to do my course project for developing Sudoku game i already have my codes but i need a code for generating random numbers in the grid this is basically my code [code]import javax.swing.*; import java.awt.*; import java.util.*; /* … |
| | I have an assignment to make a paint program using java but i am kind of stuck at a roadblock. I have a pencil tool and i used the mouseDragged, mousePressed, and mouseReleased methods of mouse(motion)listener to draw my path using general paths (lineTo and moveTo). My question is, is … |
| | I am a fairly new programmer still in school, and trying to have my program write the selected information to a designated file. I keep getting an error message on my file OutputStream. [CODE]import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import java.text.*; class ExampleJComboBoxSample extends JFrame implements … |
| | how can I read trace file in java and store it in an array. |
| | Can someone show me what bubble-sorting an int[] of { 5, 4, 3, 2, 1 } looks like? I have to place it inside [CODE]public class SortIntArray { // this method needs your code to be added to work public static void sort(int[] list) {[/CODE] with no calls to any … |
| | can somebody help me out by providing link to the stuff related to buffer reader in java to read a trace file and store it in array of string. |
| | Hi Actually i try to do this programming but i have some problems. I'll become thank you if help me to fix it. It is a simple Ferry Ticketing System with below conditions : FERRY TICKETING SYSTEM A small ferry company has just purchased a computer for its new automated … |
| | hi people i am new to this site ... i needed a bit of help i have got an home work to create this :the use will enter 6 random numbers and the computer will print the series :input: 10,5,6,4,3,6 output: 10 5 6 4 3 6 5 1 2 … |
| | Hello, I am new, and this question may seem stupid but I'm kinda lost.. i didn't attend the first classes because I was ill. Can someone help me to construct a pseudo-code for a rectangle like this: ******** * * * * ******** (it doesnt look right - it should … |
| | I have the user enter a string e.g. subject of book using a scanner then a for loop, to print out all the books with the same subject to what the user entered. But I'm having a problem in that it will only print out the first occurrence. For example … |
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