35,617 Topics
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| | I have this problem with graphics, actually I know it's with my compiler... If I try to set the background of a button or something I get erros that's not even in my code.. I have this: [Code] btnCalc.setBackground(Color.blue); [/Code] and I get theses errors [Code] //g is already defined … |
 | I have a GUI that displays a graph and I want to have some help with a code that allows you to click a point and then another point and then it draws a line. I need some help with this because I don't know were to start. ;) |
| | hey guys, I have problem in printing from java i have used PrinterJob in awt but it's going mad sometimes . it's going to it's print method two times some times doesn't print anything the code is ========================================================= [code] import java.awt.print.Printable; import java.awt.print.Book; import java.awt.Graphics; import java.awt.print.PageFormat; import java.awt.print.PrinterJob; import … |
| | code is below int average(){ //method in class int total = 0; int NOS=5; System.out.println(""); for(int i=0;i<10;i++){ if(ID ==" "){ NOS = i; break; } total += mark;// total is the problem, tried printing it // while thefor loop was running and at the end // and its says "0" … |
 | Is there anyway of actually changing the length of a slider. I have a some sliders in a grid layout and im wondering wether the grid layout will stop the sliders from expanding. |
| | I have two erros which I have tried everything to fix them C:\Documents and Settings\java:14: array required, but java.lang.String found ID[count] = ID; ^ C:\Documents and Settings\java:15: array required, but int found mark[count] = mark; heres the code class Module { String[] ID = new String[10]; int[] score = new … |
| | Hi, I am learning Java and I have decided that I should create my first project. I have the application code for a Tax calculator and I would like to add a GUI to it but I am struggling to work out how to enable the text field box to … |
| | Hi all, does anyone know of a good compiler I can download for java? It would be nice if it was an IDE but it does not have to be. I currently have the j2sdk-1_4 compiler [url]http://java.sun.com/j2se/1.4.1/download.html[/url] and it does not seem to work that well. Also I know that … |
| | This class is suppose to create a JPanel with a bufferedimage to draw on..I instanstiate this class from the main driver class, and it shows up fine, but I can't draw anything on the image, or even set the background color of the jpanel. Here is the class, see if … |
| | Hi, I have set-up a while loop to iterate an amount specified by the user. However, is it possible to compare two numbers entered by a user inside the loop and then have the larger number replace the smaller? I am having trouble because I have the first result being … |
| | Hi I need help with devising a method that will calculate the frequency of elements in a chain data structure. Here's an example of what the method is supposed to do. If x = [3,6, 5, 9, 4, 5, 3, 5, 5, 1, 6, 10, 3, 3, 1, 7, 5, … |
| | Hello everyone, I am wondering how to use java.util.Properties to get the corresponding value of a specific key whose corresponding value is an array, and I am also wondering how to express/format an array in a properties file. For example, I have a key "friends" whose corresponding value is a … |
| | I plan on writing an app that will graph polynomial expressions. My question is, what should I draw the graph on? Should I just use the regular frame and use DrawLine(), or is there something like a bitmap, or canvas thing I should use? |
| | Hi folks, I shall start my first lesson to learn Java. I found following sites/tutorials; Tutorial (search) [url]http://onesearch.sun.com/search/onesearch/index.jsp?qt=java+tutorial&uid=6910019[/url] Java Tutorial [url]http://java.sun.com/docs/books/tutorial/[/url] [url]http://java.sun.com/docs/books/tutorial/information/download.html[/url] Java Tutorial Books [url]http://java.sun.com/docs/books/tutorial/book.html[/url] Java Tutorial Sites [url]http://java.sun.com/[/url] Java Tutorial, Trailmap [url]http://java.sun.com/docs/books/tutorial/trailmap.html[/url] Training [url]http://training.sun.com/[/url] Kindly advise which of them shall I stick to at start. Are there any … |
| | hi i have red hat 9 on the system. i downloaded java sdk for linux path from sun and installed it. i did exactly what the [url]www.linuxquestions.org[/url] tutorial said, but still it says javac command not found even though i renamed the path using the locate javac command. |
| | Whats wrong with this im just dumb and couldnt figure it out help please //SLOPE import java.io.*; public class SLOPE { public static void main(String args [ ]) { int Y2, Y1, X2, X1; BufferedReader reader; reader = new BufferedReader(new InputStreamReader(System.in)); try { System.out.print("\nY2 ="); Y2 = Integer.parseInt(reader.readLine( )); System.out.print("Y1 … |
| | //main method int number = 1; int num = 3; details[] Darray = new details[number][num]; String name = JOptionPane.showInputDialog(null, "Enter the name", "Enter details", JOptionPane.QUESTION_MESSAGE); String DOB = JOptionPane.showInputDialog(null, "Enter the DOB", "Enter details", JOptionPane.QUESTION_MESSAGE); class details // i have default construtors aswell String getName(){ return name; } heres the … |
| | I need help with breaking out of a loop. I know it's something simple, but I can't remember. Here's my code. for(count = 0; count < inputArray.length; count++) { inputArray[count] = JOptionPane.showInputDialog( null, "Please input a name or exit: ", "Input Name", JOptionPane.QUESTION_MESSAGE); if(inputArray[count] == "Exit") { break; } } |
| | Hi, I have a project where we need to scan each pixel from an image. Somewhere in the image there will be a 10x10 red pixel and we need to draw a circle around it. This is the code I have so far: (but I'm having trouble figureing out the … |
 | I am stuck trying to figure out syntax errors in program. Would appreciate help. Thank You In Advance :D These are the errors: C:\My Documents\myJavaFiles\Homework 2\Inventory.java:40: illegal character: \92 System.out.println("Item Already Exists --" ' +item + '); ^ C:\My Documents\myJavaFiles\Homework 2\Inventory.java:40: unclosed character literal System.out.println("Item Already Exists --" ' +item … |
| | Hi everyone, I have a small program in which i try to encrypt a zip or jar file but here is the thing in that eveything can be decrypted and encrypted without any problems but the archives(either a jar or zip file) after decryption later cannot be read. This does … |
| | Hi everyone, I am trying to add an undo listener to a jtable but could not get it to work. Does anyone know how to add a undo function to a jtable assuming the default cell editor component is a jtextfield? A small code sample would be helpful Any help … |
| | I'm using the Fly-out Menus provided at [url]http://www.sharepointcustomization.com/resources/codesamples/Menus/default.htm[/url] . The code at my site works fine if the pages using the menu are in the root directory ( the initmenu.js and menu.js along w/ all the .gif's that make up the border are in a subdirectory of the root) I'm …  |
| | i want to make a simple applet in which a ball bounces using Runnable interface ..i know how to draw a ball , i know the translate() to change its location method but what i dont understand is how to use the Runnable interface's run() method fit into my applet …  |
| | Im currently using method getKeyText() and getKeyCode() like this How do you listen for * - and + with keylisteners. / is the only one that works atm the rest won't get recognized for some reason if(event.getKeyText(event.getKeyCode())).equals("/")){ //do something } that method works, but when I try using a + … |
| | Hello everyone, I am looking for peer to peer programming resources (open source projects, tutorials or papers). I am wondering where can I find valuable ones especially Java based technologies. Thanks in advance, George |
| | When you have to write your own class, is it ok to call the scanner class in your class? |
| | Hello there, I am in desperate need of some help. I cannot seem to access anything that takes Java. A radio programme, diagram for booking airline seats, and now I can get into a btinternet e-mail account but am unable to read the e-mails. I did post this problem some …  |
| | Hi everyone, I have a question about the java multi-platform print dialog. I am able to show the dialog but here is the kicker in i am unable to select the printer properties on the print dialog. The printer properties button seems to be always disabled. This does not happen … |
| | Hi everyone, I have two questions about the java multi-platform print dialog. The first question is about the printing of double-sided which is supported by some high end printers but the thing is that when i want to change the properties so that the user can decide if he wants … |
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