35,618 Topics
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| | Hi I would really appreciate if someone could tell me what I am doing wrong. I think I have a major error but I can't seem to find out where it is =( My assignment is due tomorrow so if anyone would be up right now and could tell me … |
| | Dear fellow programmers, I had tried and successfuly created JVM and used JNI from C++ executable. But when I change my C++ executable into a shared library (.so, in UNIX) like this [CODE] extern "C" int callFromFakeSID(char* name) { JNIEnv *env; JavaVM * jvm; env = UART_Display_Java::create_vm(&jvm); if (env == … |
 | Hi all, Im using hibernate in netbeans to map to a mysql database, but am having problems.... when I open a session: [CODE]Session session = SessionFactoryUtil.getInstance().openSession(); session.beginTransaction();[/CODE] it prints out this in the console:... [COLOR="Red"]12/04/2010 9:50:26 AM org.hibernate.cfg.annotations.Version <clinit> INFO: Hibernate Annotations 3.3.1.GA 12/04/2010 9:50:26 AM org.hibernate.cfg.Environment <clinit> INFO: Hibernate … |
| | I just cannot figure out what is wrong, so tried. Can someone please help me so I can finish this today or tomorrow please. [code] //adds all 10 panels together this.add(mainpanel); //set see the frame setVisible(true); } JOptionPane.showMessageDialog(null,"Oringinal Balance = $" + recieveAmount + "\nPayment#" + x + "\nMonthly Payment$" … |
| | I am having trouble adding the ability to order an integer array in both ascending and descending order. I have implemented the functions myself and am having trouble figuring out how to order them in reverse order. I am passing in a boolean variable to test which direction the array … |
| | Hi i have been trying to get a GUI in BlueJ working properly but i hav come across a prolem, i hav 2 buttons which i want to use but when i click them the actionListener wont run my methods. In the action preformed bit i tried to make it … |
| | My main.java [CODE] public static void main(String[] args) { // TODO code application logic here Rational x = new Rational (); x.num = 2.0; x.den = 3.0; System.out.println (x); Rational.negate (x); Rational y = new Rational (1.0, 3.0); System.out.println (Rational.invert (y)); } [/CODE] My rational.java [CODE] package rational; public class … |
| | [code=java] import java.io.*; import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.text.*; import java.util.*; public class Transfer extends JFrame implements ActionListener { //Declare output stream DataOutputStream output; //Construct a panel for the fields and buttons JPanel fieldPanel = new JPanel(); JPanel buttonPanel = new JPanel(); //Construct labels and text boxes JLabel … |
| | In here: [url]http://java.sun.com/docs/books/tutorial/uiswing/components/toplevel.html#general[/url] It says: The default content pane is a simple intermediate container that inherits from JComponent, and that uses a BorderLayout as its layout manager. In here: [url]http://java.sun.com/docs/books/tutorial/uiswing/components/jcomponent.html[/url] It says: The JComponent class extends the Container class, which itself extends Component. This is contradictory, isn't it? Also what … |
| | hello to everybody I have a linked list that contains objects each object contains two String field I want to know how to check if the object that i want insert is already exists in the linked list thank you |
| | Can somebody help me in reading text from a file without using Java Class Library??? |
| | I'm having trouble writing code to save binary trees that are created by my program. I'm trying to save the tree to a file by trying to use preOrder traversal and writing the data that way. But so far nothing gets written to the text file. I'm supposed to write … |
| | im trying to take an inputed file and use a linked list to read it and display the most frequently used word. Anybody know how to do it? [CODE] import java.io.File; import java.io.FileNotFoundException; import java.io.FileReader; import java.util.*; public class mostFrequentWord { LinkedList<Word> list = new LinkedList<Word>(); public void Read() throws … |
| | I'm trying to wrap the following so it shows up easily on the prompt screen. How can I wrap it up? [CODE] System.out.println("Anwser the following trivia questions with a true/false input. Since I am" "a horrible programmer, you will have to enter 1 for True and 2 for False. If … |
| | Hey guys! I have a program I am writing that I have gotten stuck on. It compiles fine but when I run it I get several error messages. Illegal format Conversion Exception is one of the error messages. I am stuck and I don't see where the error is. Any … |
| | Hello people, Im getting an "Exception occured ---java.lang.NullPointerException" error when i try running the code below: [code=Java]public void Register(String Username, String Password, String Surname, String Firstname, String Email, String Phone) { String a = Username; String b = Password; String c = Surname; String d = Firstname; String k = … |
| | From the java generics tutorial: "[CODE]List<String>[] lsa = new List<String>[10]; // not really allowed String s = lsa[1].get(0); // run-time error - ClassCastException[/CODE] If arrays of parameterized type were allowed, the example above would compile without any unchecked warnings, and yet fail at run-time." I have problem understanding why would … |
| | On line no no of stars 1 1 2 3 3 5 4 3 5 1 * *** ***** *** *  |
| | Can Java read it's own source code? Possibly by using reflection.. or something. I would like to dynamically display the code to each method inside of my interface. Any idea how that could be acheived? Thank you. |
| | Hello and thanks in advance for your time. Why is the InputStream not excepting the String path to a package containing a properties file? [code] private void writeBtnActionPerformed(java.awt.event.ActionEvent evt) { String path="/view/resources/projectnames.properties"; String txtIn=writeTxt.getText(); PropertyWriter pw = new PropertyWriter(); try { pw.StreamToString(path, txtIn); } catch (IOException ex) { Logger.getLogger(WriteContentTab.class.getName()).log(Level.SEVERE, null, … |
| | Hi, I'm trying to find a way for the user to draw an image on the screen, and then return a formal version of the image. This is a tool to enable practise writing symbols from an ancient language. What I mean by a formal version is the properly drawn … |
| | Ihv writtten a prog of file searching and the result is to be displayed in table Im geting exception of stringindexoutofbound: String index out of range: -1 at java.lang.string.substring(unknown source) if i changed the path E:/ to e:/programs (program is some folder) then prog run correctly but i want to … |
| | Hello, I have tried to solve this problem but I cannot, its been over a week. I need help in designing the solution for this problem. I need to make a system of food processing, food is inputted to machines, where it is processed and packed. If you can contact … |
| | [CODE] import java.util.*; import java.util.Scanner; public class InputconsoleArray2 { public static void main(String args[]) throws java.io.IOException { int[] a=new int[100]; // create an array of type interger size // Objects of type Scanner are useful for breaking down formatted input into tokens and // translating individual tokens according to their … |
| | Hey guys ........plz can you suggest me any project wic uses simple java and sql and may be connectivity between java and sql I am in 12th standard and want to make a good project related to above items......................  |
| | Produce THREE buttons using SWING package. Each of the three buttons will react according to their respective tooltips. - Button A: set to Enabled and show the tooltip "Click this button to enable the Button C.” After this button is clicked, it should disable itself and Button B. - Button … |
| | Write a program that will determine whether a deparment store customer has exceeded the credit limit on a charge account(5000$). The customer gives you his/her account number, he/she has a beginning of the month balance, the program should total all the purchases by the customer for the month, total any … |
| | I am having problems persisting a ManyToMany relationship using Toplink and entity objects created automaticaly by Netbeans. I have attached the relevant entity objects as Data.zip. My problem is this: Chapter and Strand have a ManyToMany relationship as you can see in the entity objects. A strand contains multiple chapters … |
| | I am trying to read a textfield. I am using the string=textfield.getText() notion, but all I get a is a blank string back. I am using netbeans and I am using the gui designer within it. I want to hit the "create grid" button and have it create a grid … |
| | Hi im writing a program using arrays but im not sure what to do. I think i have the first three methods done correctly but i cant figure out how to do the rest. Im also supposed to write an application file but im not sure how to with arrays. … |
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