36,051 Topics
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| | how todesign automatic grading system online using java i want to create one web application which creates online grading system for the students. which displays their grades,marks and ranking ...  |
| | discuss how java programming languagues differs from procedurals programming such as pascal and c. 1.classes 2.objects 3.attributes 4.methods 5.pirvate,protected,public 6.encapsulation 7.interface 8.inheritance 9.polymorphism  |
| | This simple code is showing the following error. [CODE]import java.io.IOException; import java.net.*; public class Server { public static void main(String[] args) throws IOException { DatagramSocket ds = new DatagramSocket(999, InetAddress.getByName("192.168.1.102")); ds.send(new DatagramPacket(new byte[10], 10)); } }[/CODE] Error: [CODE]Exception in thread "main" java.net.BindException: Cannot assign requested address: Cannot bind at java.net.PlainDatagramSocketImpl.bind0(Native … |
| | What would be a regex pattern for the following ' and ® in Java. I have tried the following but have not been successful 1.&#[0-1][0-1][0-1] 2.&#\d\d  |
 | Hi all , pls suggest me some good tutorials to learn complete j2ee .. Thanks in advance |
| | DEFINITION OF DATA REQUIREMENTS Produce an itemised consigment note for each customer including -dimension,weight and price per parcel. -total weight and price consigment -number of parcels RESIDENT DATA -up to 2kg-£7.50 -up to 4kg-£8.00 -up to 10kg-£8.55 -up to 12kg-£9.10 -up to 14kg-£9.70 -up to 16kg-£10.35 -for each extra 2kg,up …  |
| | Can anyone please help me! Very stuck on an assignment i need to code a java applet so that it counts the lengths of words for example i am a man would produce the output 2 - one letter words 1 - two letter word and 1 - three letter … |
| | Where weight is the person’s weight in grams and height is their height in centimeters. If the result of this calculation is less that 20, then the person is medically underweight. If the result is greater than 30 then the person is medically overweight. Write a program to calculate whether …  |
 | Hello everyone, I have a book called "Java Genesis" and it has some files such as packages, projects and hints to enhance learning. So, I have set up a file structure in Eclipse and it shows that there are errors and warnings. When I tried running a Java Application using … |
| | I am creating a program that will simulate a fish tank (got it off of google) and when I try to get the image using [CODE]mClownImage = getToolkit().getImage("Fishes/mClown.gif");[/CODE] the getToolkit() part gives me an error. it suggests that I make a method called that. I have imported java.awt.Container; which contains … |
| | Hello I've made a program using JCreator. It was working fine and all of a sudden it won't run anymore. I get this message: [CODE] --------------------Configuration: <Default>-------------------- Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: … |
| | I am interested in learning java online. I am looking someone who is willing to teach online.  |
| | Hi! I've written function that writes to one of eight files. It writes one of the strings, which is associated with a file to that file. There is also a similar one, it just reads from that file and returns it. When I run the program, it does everything correctly, … |
| | Hello Im trying to code something like this [CODE] public class Decoding{ Decoding(InputStream in) //constructor Object obj = new XMLDecoder(in) } } [/CODE] [CODE] public class Test{ public static main(String[] args0){ JButton button = new JButton(); decoder = new Decoding(new FileInputStream("somtheing.xml")); button= decoder } } [/CODE] So as you see … |
| | can anyone tell me how to bring jbutton within a jtable.........and how do do the actionperform of the button can i do this in jframe......  |
| | Hy , I have a example tooken from the internet , and compiler gives me this error : The type CommPortIdentifier is not accessible due to restriction on required library C:\Program Files\Java\jre6\lib\ext\comm.jar The code is: [CODE]import java.awt.*; import java.io.*; import javax.comm.*; import java.util.*; /** * Open a serial port using … |
| | hi All - total noob[java] here; i have an app on the android written, but i believe the question here is totally java related. after my app adds field1 + field2 + field3 and displays the value in field4, how do i *start over*? thing is, if ea field is … |
 | Guys , I'm a newbie Java programmer .. 3rd year comp sci engineering student and a C++ programmer with around average programming skills I should say :D !I find it kinda weird that reading something from keyboard is such a pain in java .. Importing DataInputStream , the creating and … |
| | Hey gyz, i'll like to create a java database application and wondering the best Database engine/platform to use dat'll be small, compact and easily distributed, i have sum on mind but i'm confused on the best engine that offers, quick and effective data connection, small in size. Ur advice would … |
| | could anyone help this... when i run my application i got this error.. Running with storage root C:\Users\182\j2mewtk\2.5.2\appdb\DefaultColorPhone Exception in thread "Child process stdout copier" java.lang.ClassCastException: sun.java2d.NullSurfaceData cannot be cast to sun.java2d.d3d.D3DSurfaceData at sun.java2d.d3d.D3DRenderer.copyArea(D3DRenderer.java:55) at sun.java2d.d3d.D3DSurfaceData.copyArea(D3DSurfaceData.java:665) at sun.java2d.SunGraphics2D.doCopyArea(SunGraphics2D.java:1986) at sun.java2d.SunGraphics2D.copyArea(SunGraphics2D.java:1968) at javax.swing.BufferStrategyPaintManager.copyArea(BufferStrategyPaintManager.java:316) at javax.swing.RepaintManager.copyArea(RepaintManager.java:1239) at javax.swing.JViewport.blitDoubleBuffered(JViewport.java:1604) at javax.swing.JViewport.windowBlitPaint(JViewport.java:1573) at javax.swing.JViewport.setViewPosition(JViewport.java:1118) … |
| | Im having a problem with this program why i am not able to set present total price of product if gonna seect the product form combo and the remove button cant get the selected index,retrieve the selected item and remove the selected item from the list using its index or … |
| | Hi, I want to get the information from the website using HttpURLConnection.I wrote this [code]import java.io.IOException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; public class webPractice { public static void main(String[] args) { try { URL yahoo = new URL("http://www.yahoo.com"); URLConnection yahooConnection = (URLConnection) yahoo.openConnection(); yahooConnection.connect(); long s=yahooConnection.getDate(); System.out.println("date"+(String)yahooConnection.getContent()); System.out.println("Hi"); } … |
| | Hi all. my code is below: [code] <script type="text/javascript"> function gu_gid() { var ggid = document.getElementById("gid"); if(ggid.value != "" && ggid.value != "select") { $().ready(function() { $("#autocomplete").autocomplete("test.jsp?gid=" + ggid.value, { max: 50, width: 300, matchContains: true, selectFirst: false }); }); } } </script> . . . <form action="#" autocomplete="on"> <div> … |
 | Great to hear that.. Java SE 7 is officially released today! After nearly five years of collaboration within the worldwide Java community, Java Platform, Standard Edition is ready for download! It's an important step in Java’s evolution. The major features of Java SE 7 are: • Project Coin- many small …  |
| | Hey guys! I'm trying to create an accounting system, one that can create worksheets, create balance sheets, etc.. Is it easier to do this in Java or some other programming language. Got any suggestions on how I can accomplish this? |
| | Hii... Read the thread and found it to be quite informative... I too, am making a stock broker project, learning purpose only... For that i use data, available free from yahoo finance... But, haven't progressed a bit in the representing via charts.. Please please help me out on this... Abhay. |
| | I need to show the content of one panel class into another panel of another class ..i am new to java so i would appreciate any help...plz help me... in short i just want to add one panel into another through actionlistener of some button.. |
| | I need some help with doing a choice. Atm i have [code]choice = switch (choice) { case 'A': case 'a': { optel (); break; } case 'B': case 'b': { break; } case 'C': case 'c': { break; } default: { System.out.println ("You did not choose any of the options"); … |
| | hello i am beginner to java i wrote a simple program of object array but it is showing run time error [QUOTE]Exception in thread "main" java.lang.NullPointerException at classarr.main(classarr.java:14)[/QUOTE] [CODE] class abc{ int i; } class classarr{ public static void main(String arg[]) { abc a[]=new abc[4]; int j; for(j=0;j<=3;j++) a[j].i=j+1; for(j=0;j<=3;j++) … |
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| | I created a program on NetBeans. The package contains three files: MainProject.java, Input.java, and Output.java. When I run the MainProject.java file on JCreator, it opens up the Input.java form, but when I click the "finished" button on the Input form, it doesn't open the Output form. How do I fix … |
| | The following code shows a simple use of speech synthesis to speak the string "Hello World". [CODE]package helloworld; import javax.speech.*; import javax.speech.synthesis.*; import java.util.Locale; public class HelloWorld { public static void main(String args[]) { try { // Create a synthesizer for English Synthesizer synth = Central.createSynthesizer( new SynthesizerModeDesc(Locale.ENGLISH)); // Get … |
| | Hi I am in a java class and am working on a mortgage calculator with gui. I think I almost am done and have the assignment parameters completed but am stuck on two issues. 1) can't get my scroll pane to work. 2) I want to have the user select … |
| | I'm writing an application for processing scientific data. The data is displayed in a jTable. I'm done with the data processing itself, now I want to do some conditional formatting to make interpretation easier for the end user. [LIST=1] [*]The last column of the table contains a threshold value, and … |
| | import java.io.*; public class Wisk_project_template { private static BufferedReader inStream = new BufferedReader (new InputStreamReader (System.in)); //***************************************************************************** // handles addition private static void optel () throws Exception { // ask name System.out.print ("Hi - what is your name? "); // call menuLevels and ask for level menuLevels (); System.out.print ( … |
| | What does "values", "data" and "field" mean in java ? For example, definition of encapsulation is hiding of data in a class and making this class available only through methods. In this way the chance of making accidental mistakes in changing "values" is minimized. In access specifiers, Java allows us … |
| | So, I created two forms: Input and Output. In the Input form, the user inputs the required information such as name and schedule. Then when the user is finished, he/she will click the "finished" button which brings up the Output form which has all the inputted info from the Input … |
| | Hey, I've just started with JSP! Was trying my hand at this Shopping cart app.here's the code..[CODE]<%@page import ="java.sql.*"%> <%! Connection con = null; String query = null; PreparedStatement stmt = null; ResultSet rs = null; %> <HTML> <BODY BGCOLOR='ORANGE'> <CENTER> <H2>YOUR CART CONTAINS</H2> <% try{ Class.forName("com.mysql.jdbc.Driver"); con = DriverManager.getConnection("jdbc:mysql://localhost/shopping_mart?"+"user=root&password=root"); … |
| | I have a picture with 2 buttons, and I want to move it through these buttones the problem is I don`t know how to make the actionListener for the other button to move to the other side, [COLOR="Red"]pictures are in the attachments[/COLOR] [CODE]import java.awt.event.*; import javax.swing.*; import java.awt.*; import javax.imageio.*; … |
| | can anyone tell plzz!!!!what is difference between interface and annotation type in java? |
| | I have a problem in my game about button how I can display the random number example "3 + 5" in the upper button ...I try one button here but you need to click it in order to see the random number and only one number will appear..please any idea.. … |
| | HI TO ALL [CODE] import java.applet.*; import java.io.*; import java.awt.*; import java.awt.event.*; import java.net.*; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.net.UnknownHostException; public class sid_fari extends Applet implements ActionListener { String msg,msgs,msgss; Button loads = new Button("clik me"); public void init(){ add(loads); loads.addActionListener(this); } public void paint(Graphics g) { g.drawString(msgs,10,40); … |
| | i am currently working with jsp for building a travel based website and have to deal with GIS maps. now i am working with netbeans ide because it has glassfish server deployed with it so it is easy to work and configure what you need. but when it comes to … |
| | Here is the error [IMG]http://i1199.photobucket.com/albums/aa465/aaron55494/compileerror.png?t=1311972955[/IMG] and here is the code that i'm working on [CODE] public String getKillMessage(String player) { String[][] selection = {{"Congratulations, you have defeated ", "}, {"Congratulations, you have ", "}}; int index = (int) Math.floor(Math.random() * 9); return selection[index][0] + player + selection[index][1]; }[/CODE] Any help … |
 | I was doing a projecteuler problem. I made a program that would find all the prime numbers under 1000000 and write them all in a file. Why is that if I use the file name as "primes.txt", the result is gibberish from beginning to end, but when I use "primes.dat", … |
 | pals i just wanna ask if anyone could show me how to declare and call a 2d array? thanks in advance!!! |
| | Hi i m having problem... i want to give each random number to each month.. but it gives erros [CODE] public class a { public static void main(String[] args) { float average = 0f; String[] Year = {"Jan","Feb","Mar","Apr","May","Apr"}; int[] values = new int[5]; for(int i=0; i<values.length; i++) { values[i] = … |
| | I'm trying to display a total integer value taken from the Jtable cells and want to display the sum in the last cell so for that i need to covert the final sum to object or are there any other solution...any help will be thankful!!! |
| | Is it possible to add mouselistener to particular cell of a Jtable?? plz help... |
| | I need some help parsing a string array returned from method. current results: Here is the test Information: SPRCBT - Algebra 1 - Form 9D - Joe Smith Here is my Test Name [Ljava.lang.String;@5ec24193 Any ideas on the best way to return the values of the array instead if the … |
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