36,051 Topics
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| | 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 … |
| | I have a JMenu with some radio buttons...For some reason, when I click the stupid things, they won't do anything...and by that, I mean they want change their state to being clicked(as in the circle being filled)..It's like they are disabled...I'll post the snippets of code with them in it: … |
| | I am using java server pages and connecting it to a simple access database. I have a form with about four columns in it. Two of the column are already filled out and the other two need filling out. In the two empty columns there are text boxes which allows … |
| | Let's say I have two classes, Class1, and Class2..... Class2 creates and instance of Class1 and calls one of it's methods like this: [Code] Class 2 { Class1 c1 =new Class1(); c1.myMethod(); } [/Code] Now, that would work...But, could you have just the class variable instead of the class instance … |
| | Hello everyone, Suppose I have a method which is a synchronized method (for example, method Foo in the following code block), and in this synchronized method another method which is not synchronized is invoked (for example, method Goo in the following code block). I am wondering when executing in Goo … |
| | Hi everyone, I have a question about key events. In the key events they have some values called as follows: static int KEY_LOCATION_LEFT static int KEY_LOCATION_NUMPAD static int KEY_LOCATION_RIGHT static int KEY_LOCATION_STANDARD I have seen the api and the explanation of what the above values represent and still do not … |
| | I took a course in C and now im into java. I never created anywith graphics in C. I need to finish a program in C that makes a red ball appear on a blue background and then move down and up the screen. Any information of how to at …  |
| | Can applets display images on the viewers hard drive somehow? If so how would I do that? And if I dont know the filenames but I know the directory, is there a way to do it? |
| | Well once again I have some trouble getting my lab to work. I am currently having trouble on an algorithm that is supposed to count the neighbors next to a cell in a Two-dimensional array which is supposed to resemble with the algorithm of Conway's Game of Life. For some … |
| | Hi peeps, I was wondering if anyone could help me. Im using a [B]JEditorpane[/B] to display a html page in. What I want to do is to change the font colour of the html page. I have tried to use the [B]setCaret()[/B] method, but to no avail. Anyhelp would be … |
| | Hi everyone, I am trying to save the contents the of the jtable together with all its fonts and everything else. The program compiles without any errors but When i try to save the contents of the JTable an exception is thrown in the tablesaveas method in the below method … |
| | I had installed MinGW-3.2.0-rc-3.exe and i was trying to compile a simple code: [code] public class HelloWorld { public static void main(String args[]) { System.out.println("Hello, World"); } } [/code] then i typed this command under vim, !java d:\progsaved\java\jdk\HellWorld, before i typed this !javac d:\progsaved\progsaved\java\jdk\HelloWorld.java to generate class file. The errors … |
| | I have the datasoure and drivers set up, but for some reason this code is not updating the database. [Code] import java.sql.*; public class TestCreateCoffeeTable { public TestCreateCoffeeTable() { } public static void main(String[] args) { try { String createStatement; Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); String dataSource = "jdbc:odbc:Coffeebreak"; Connection con = DriverManager.getConnection(dataSource); Statement … |
| | Hi everyone, I have a question about threads. Consider the below program [code] public class test { public void test1() { System.out.println("Test 1"); } public void test2() { System.out.println("Test 2"); } public void test3() { System.out.println("Test 3"); } public static void main(String args[]) { test a = new Jtest(); a.test1(); … |
| | Hi I need to write a method that will rotate the elemnts in an array by a factor of k. ie shift each element k places to the right. Here is the question i have been set [B]In the class ArrayLinearList a linear list is represented in an one-dimensional array … |
| | Hello everyone, I want to know which method owns the lock of a specific object (some of my methods are blocked because they can not achieve the lock of a specific object, and I am wondering which method owns the lock to solve the deadlock issue). Does anyone know how … |
| | Hello everyone, I am looking for a light-weighted Web proxy in Java which can enhance the performance of my web server. I want it to be written in Java so that it can be used on any platform. I want to place the Web proxy between a specific Web server … |
| | Hi everyone, I have a jtable and i need a way to be able to merge or to split the cells(both the rows and columns) selected by the user. I have seen the table model and jtable apis' and there seems to be nothing about this. I would appreciate it … |
| | Hello, I am a java/html novice. Actually I have no clue as to what I am doing. Currently I have some java applets that communicate with a server and display data based upon what state the equipment is in. Say an input to a system is true it will display … |
 | Hey guys n girls, I have two arrays (one for x and one for y axis) which contain labels i would like to display on a graph. How do you recommend i do this? I was thinking multiple JLabels, spread out depending on the quantity. But If theres a better … |
| | Topic is misleading I edited it. What would be the best way to put a period at the end of a sentence without just adding it to the last word or last variable etc. Like say i had String s = "Hello I am a sentence"; what would be the … |
| | I am taking a basic java programming class. Unfortunetly it is an online class, and I am unable to find a tutor. We are using the book Java How to Program sixth Ed. and are going through two to three chapters a week. I am soo lost!! My next lab … |
| | I am running windows 98 on a Gateway computer. The problem I am having is when trying to install Java I keep getting Error Message 1311 Source file not found. I have tried more than one Java program and it keeps happening. Please help. |
| | I'm curious as to how many of you routinely use jdk 1.5 tigers added features, methods, api's and whatever. Or, do you just stick to 1.4?  |
| | Hi, I have been trying to solve this problem for a while now. I wrote a program that analyzes 3 numbers entered by a user. All calculations are working fine. Now I am attempting to use 'if' statements to display the largest and smallest number entered. I am adjusting the … |
| | I need the ball to move down until it hits the end of the blue rectangle then move back up until it hits the top and repeat forever. What's wrong with my code? [code] //This applet draws an animated bouncing ball with uniform speed. //The ball starts at the center … |
| | Hi everyone, I have a question to ask about printer attributes. I am using the PrintRequestAttributeSet class and am a bit confused as to whether i will still have to use the PageFormat class to set the page format of my printed page. See this below function [code] public void … |
| | Hi everyone, I am trying to center a page number on the bottom center on a printed page but i am having some trouble doing it. I am using the windows default page dialog where the user can select the desired page size(ie, a1,a2,a4) but i am unable to center … |
 | I have a few problems. I want to read in a .dat file with characters like below: A B C B * D D * J J * * i used a readLine() from a fileReader, and put all of the characters into a char array. Then i want to … |
 | is there a way that i could run java on a windows 95 machine. right now dont know all the specs will get back to you on that. the reason i want to know is a recently got a book on how to code java only problem is my computer … |
| | I am doing a project on sending & retrieving sms via java.pls tell me the source code as i am not able to use AT commands in program. |
| | Can somebody help me. I need to convert a programme from Qbasic to Java. Any help is much appreciated. Peter |
| | I have been using JAVA for a whole two weeks now. I am enrolled in CSC 148 at my local college. I am supposed to write a program that asks the user for his or her age and replies with the day of the week on which he or she … |
| | I am relatively new to JAVA, so I am still struggling in areas. What is the best way to go about creating a Calendar similar to the one found in Microsoft Works. I am working on an application for a client that requires a calendar which he/she can use to … |
| | Hello everyone, I am wondering how to remove debug information (for example, System.out or System.err) automatically when I build/compile a Java project? Does Java compiler or build tool has such options when we build/compile a Java application? Thanks in advance, George |
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