36,051 Topics
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| | apart from using an oracle db, how else to manage a db using java?? |
| | I need to know how to do the following: Allow for editing and Allow for searching by state or by any other options This is what I have so far: [CODE] import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.border.*; public class AddressBook extends JFrame { // Specify the size of … |
| | I'm needing to evaluate string infix equations and transform them to postfix equations. I'm following the info here: [url]http://scriptasylum.com/tutorials/infix_postfix/algorithms/infix-postfix/index.htm[/url] 1.) I'm confused by this line: "compare the precedence of the character with the element on top of the stack" It's asking me to compare the precedence of an operand to … |
| | Hi... I'm a new user here. I've stumbled across this place on a couple occasions in the past, and it worked out to my advantage when I needed a little help with some coding assignments. My Data Structures class is working on stacks right now, and that is our current … |
| | Hello. I wish to create a servlet which checks if the entered username and password are correct.If yes..message hello else go back to page showing error message. I know the settings for tomcat. i know the basic code for servlet.I also know i need http servlet .I will be using … |
| | Hello Everyone, I'm having a bit of trouble seperating my user interface code in a main class from my logic code in another class. Basically i've put a while statement and some if statements in order to take input of a number from the user and decide which of two … |
| | I'm writing a program that transfers files around a network using UDP. One of the things I am trying to do is break down files into small byte arrays that can be put on packets and transferred. But it doesn't work... It doesn't seem to be reading the bytes correctly, …  |
| | Hello all, I am developing chat application(not applet) in java, I want it to be able to run over internet I have tried it in LAN with Socket programming I found something [URL="http://javaeye.wordpress.com/2008/05/04/clientserver-communication-using-tcp-sockets/"]here[/URL] It is working fine But how can i run it over internet:?: :confused: If i [COLOR="Red"]tcpserver.java[/COLOR](or tcpserver.class) … |
 | Hi all, I hope you are well. I am trying to compile a java file using terminal in Ubuntu, but I am getting the following error message: [QUOTE]1. ERROR in StringComparisons.java (at line 20) System.out.printf("String a = %s String b = %s \n", a,b); [/QUOTE] As you can see, I … |
| | I'm writing a program that will download pfd files and collate them. However the urls I get are a bit weird. They look like this: [code]http://links.ealert.nature.com/ctt?kn=105&m=34136651&r=MjA1NzczMzM4NgS2&b=0&j=NTkwOTY5NjQS1&mt=1&rt=0 [/code] I'm using URLConnection and BufferedInputStream, but no data is read from the stream (read() returns -1 at the first try). If they are … |
| | Html-structure [code] <html><head></head><body> <!-- START XOXO --> "lots of html and jsp stuff" <!-- STOP XOXO --> "file reading" </body> </html> [/code] The file reading code [code] <%@ page import="java.io.*" %> <% String line = ""; String file = request.getRequestURL().toString(); int print = 0; BufferedReader input = new BufferedReader(new FileReader(file)); …  |
| | [CODE=java] how to merge two or more files (similar files) ex: two or mre pdf files, two or more xls files, two or more doc files. [/CODE]  |
| | hi,,,may u help me solving this problem in java code?\ a)f(x) = xcosx-sinx/x-sinx b)Use 4 important first numbers to gain f (0.1) please help immediately,,,,,thnx |
| | Hi DaniWeb members:), I hope we could discuss about this matter and please do give advise, feedback or respond regarding my answer code below:icon_smile:. If the users enter x as 5, y as 6 the multiple table will be printed as below: 1*6=6 2*6=12 3*6=18 4*6=24 5*6=30 My answer code … |
| | I have some classes that I use in most of my projects. [B]What [/B]and [B]how [/B]do I create something so the I can use them. A jar? An import? I'm using NetBeans as my IDE. Thanks for the help. |
| | So here is the code for my program FileMatch and FileMatchTest. The purpose of this program to read file oldmast.txt which contains account numbers with first and last name and their balance. The program will also read trans.txt which contains transaction information. If the account number from trans.txt matches with … |
| | How would one calculate the number of bytes of plaintext that could be encrypted as a single block given the key size? And how could you then calculate the number of bytes of cipher text that can be decrypted in a single block given the same key size because I … |
| | I want to to do the following but can't figure out how to do it in Java. I retrieve information, including the primary key, from a database. Using this information, I load a comboBox. The user selects an item from the comboBox. Using that selection, I build an SQL join … |
| | Hi, Here i draw chess boardgame ,but i want when i pressed by mouse on any square , blue rectangle appear .. I did this but when i pressed on any square the black and white coloe disappear and not only the square which i pressed has blue rect but … |
| | I know Netbeans has its own profiler, but for this assignment I have to use Jrat. I tried adding a command line argument -javaagent:shiftone-jrat.jar like you would put in the console, but it didn't work lol. I think I have the paths set up, I'm just not sure how to … |
| | ....can any one knows how to sort my class union.... ...since when i run it the output is correct but i need to sort it to feel much better...... here is my program.... this is my MAIN..... [CODE]public class FinalProjectBitString { public static void main(String[] args) { MySet universalSet = … |
| | Hi, I am writing a functional test automation script to automate the file upload feature of a web application. I am using a tool called selenium to operate on the browser. This tool however does not support clicking on the file upload control hence I want to do this operation … |
| | I have this code i java I have class [CODE] class Author { String name,surname; public Author(String name,String surname) { this.name=name; this.surname=surname; } public String getAName() { return name; } public String getASurname() { return surname; } } [/CODE] And This code is OK; I have a button in jFrame … |
| | I am new to programming Java, and cannot seem to find a simple answer to this on the discussions on how to go about this. Anybody? |
| | Hello good people of the world, I seem to be having a problem with how to make comparisons of dates using the Gregorian calendar objects. i want to find out if there is a way in which i can achieve it.the idea is make comparisons between the current date with … |
| | Oddly, I am getting a similar problem, but mine seems not quite so simple: import NsccLibrary.*; import java.awt.Color; /** * This is a class in which tic-tac-toe boards will appear. * * @author Darby McShain * @version 1.0 */ public class TicTacToeFoSho{ private NsccWindow wind; /** * This creates the … |
| | Is there a way to make an 'if' statement that applies to the whole code? I'm doing a user-input text-based program. And I basically want the user to be able to type 'quit' at any time, and that'll end the program. But I don't really want to have [CODE] if … |
| | One way to become the "ultimate" of something is to simply declare it. JetBrains, maker of the IntelliJ IDEA Java IDE, on Thursday began previewing [url=http://www.jetbrains.net/confluence/display/IDEADEV/Maia+EAP]IntelliJ IDEA Ultimate Edition[/url], the latest version of its commercial integrated development environment for Linux, Mac OS X and Windows. The "ultimate" designation is presumably …  |
| | [code] public int peek () { if (empty() == true) { throw new EmptyStackException(); } return StackContents[top]; } [/code] So I have this piece of code in a class that implements a stack. The program works perfectly. However, when I use Junit to test it, I have this: [code] @Test … |
| | Hi, I have been trying to get a java program that draws a line directly on the screen. I have made ones that draw on JApplets and JFrame's but i cant work out how i can draw directly on the screen without having something in the way. I looked at … |
| | hi, I'm trying to do my decimal to the nearest hundreths, i've tried using number format and printf but i couldn't do it. Anybody can help me with this: here is my program float grossPay = (calcGross(nHrsWrkd, hrlyRate)); float netPay = (calcTaxes (calcGross (nHrsWrkd, hrlyRate))); System.out.print("\nTaxes Withheld - $" + … |
| | Hello, I have to cycle an image colors (specifically RGB) and i would like to know if Im on the right track here. Im also using 2-dimensional arrays. [ICODE] public void cycleColors() { Color red[][] = new Color[height][width]; Color blue[][] = new Color[height][width]; Color green[][] = new Color[height][width]; for (int … |
| | Ok, i have been working on a simplistic game for about an hour now. This is what i have so far: [CODE]import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Game extends JApplet { private int APPLET_WIDTH = 500, APPLET_HEIGHT= 100; private int money; private int owned; private JLabel labelMoney; private … |
| | I am writing integers from 1-100 into a file separated by commas. I need to know how to read in a "," into a file and print it out again. Below the code is sample output after execution of the code. The comma is not output correctly. I know it … |
| | what i am trying to do is to read this data in from a file, [CODE]1980 Aug 945 100 Allen 1983 Aug 962 100 Alicia 1984 Sep 949 100 Diana 1985 Jul 1002 65 Bob 1985 Aug 987 80 Danny 1985 Sep 959 100 Elena 1985 Sep 942 90 Gloria … |
| | I am having trouble with stacks and infix and post fix this is my error: [COLOR="red"]Reading from file "input16.txt": Infix expression = (5) Exception in thread "main" java.util.EmptyStackException at ArrayStack.pop(ArrayStack.java:51) at test.infixToPostfix(test.java:140) at test.displayArray(test.java:87) at test.main(test.java:53)[/COLOR] this is the txt file: (5) (1+1) ((9/3)-2) (9-(3/2)) (1+(4-(9*(6/(5%7))))) ((1+4)-(((9*6)/5)%7)) (((1+(4-9))*6)/(5%7)) ((1+(2-3)) (1+(2-3))) … |
| | Hi, I am trying to convert an image into grey scale. I can do this using a buffered image however the image type I have is Image. As you can see in the code below I try to cast the Image to a BufferedImage, apply the greyscale then cast is … |
| | Hi, this is my final project. I have generated an xml string, this is my code: [code]import java.io.StringReader; import java.io.IOException; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.CharacterData; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.xml.sax.InputSource; <%@ page import="javax.xml.parsers.*" %> <%@ page import="org.w3c.dom.*" %> <%@ page import="java.io.*" %> <%@page import="recipe.*" … |
| | Here is my Main method - calling Display. I am getting an error message, I don't know what I am missing. Any suggestions? public class Student { private int studentID; private double studentGPA; public Student() { studentID=100; studentGPA=3.0; } public Student(int id, double gpa) { studentID=id; studentGPA=gpa; } public void … |
| | Hi friends, I am new bie to programming.This is my first project.so the tecnical terms i am not familier. I am doing one small project with Eclipse Europa,jsp , EJB. with XDoclet, weblogic server I first created all my jsp files as one project.Then i created one enterprise application project … |
| | Here is my Main method - calling Display. I am getting an error message, I don't know what I am missing. Any suggestions? (error message below the code) public class DisplayStudent { public static void main(String[] args) { Student IDNGPA = new Student(); IDNGPA.Display(); } } Error message: DisplayStudent.java:11: Display(int,double) … |
| | Hi Everybody, Kindly justify which compiler/IDE for Java is the best. i vote for JCreator! |
| | Hi. I have a recursive public static method search that takes a Tree node (any arbitrary binary tree, not necessarily a search tree) and returns whether or not that tree satisfies the order property for a binary search tree. So, my method is [CODE]public static boolean search(TN t) { if … |
| | Hi Java Developers, wondering if someone can point out why references to 'Student' (successfully compiled java class) in my ValidRecords.java source file don't seem to resolve at compile time? It's important to say that ANY and ALL references to Student object from inside ValidRecords.java don't resolve... not just the one … |
| | Hello all, How to make Java Application to a Windows Service? thx~ |
| | alright ive been banging my head against a wall for three hours and i give up does anyone have a clue? the what im supposed to do is write a method named lotsOfStars that will accept two integers: the first integer indicates the number of lines to print, the second … |
| | Hello everyone. If we open the jpg file with notepad, we can see some text or gibberish that doesn't give us any meaning. How do I append some text (ie password hash) to it using Java? I'm attaching a password hash to the jpg file. Hope that anyone reading this … |
| | Hi everyone. I'm going to read a content of a jpg file using java.io.FileReader. I'm successfully read the whole content of it. But the problem is, I want to only read the last 32 digit hexadecimal number which is MD5 hash I save earlier. How am i suppose to do? |
| | anyone please tell me where i can get mp3 player for motorola v3i. Thnks |
 | Hello... This is my naval battle game so far.. Just search i t if you're unfamiliar with the game it is only player vs computer.. can you adjust/fix my code so that: -the player is able to place his ships by means of dragging the JLabel ships at the left … |
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