36,051 Topics
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 | I know it sounds stupid but I want to try this with the kind of for (not the norma for i=0 i<9; i++) but the other one with arraylist. is this possible? If yes please help me match data types Thanks [CODE=JAVA] import java.util.ArrayList; import java.util.List; /** * Created by … |
 | Hello! My name is Page, and I am learning how to code in Java. I am working on a program, and it was homework at one time, but the assignment due date is passed. I would just like to get it going so I can learn from my mistakes, and … |
| | The API says that the implementation of BlockingQueue are thread safe, but about the drainTo method, it says : [QUOTE]"This operation may be more efficient than repeatedly polling this queue. A failure encountered while attempting to add elements to collection c may result in elements being in neither, either or … |
| | what i am trying to do here. is to let the user type a hexadecimal number [code]http://en.wikipedia.org/wiki/Hexadecimal [/code] and then display it. [code] import java.io.*; class Ex23 { public static void main(String[] args) { Console console=System.console(); System.out.println("please type a hexadecimal number"); String input; input=console.readLine(); int number; int number=Integer.parseInt(input); int count=0; …  |
| | hi i am a bioinformatics student.i am working on a project which is a tool i.e. a small software. i want to use API doc of biojava which involve the classes that help biologist in coding.some one have knowledge of it? its cookbook is available online but me unable to …  |
| | [TEX] [B]PFA the image of the chart that has been created using jfreechart, I need to append another series of data as percentage value. That value will be overlapping with already present percent value, since my interval is 25,000. Intervals are being generated by itself in JFreechart depending on the … |
| | [B] Hi, I'm unable to change the font colors by using java. Can u please help me that how can i change the font colors in java. If you possible please share that respective Font Code. [COLOR="Green"] Thansk & Regards, Jayavardhan Tummidi. [/COLOR] [/B] |
| | what i am trying to do here, is to make it possible for the user to type 2 lines, and then say(or display) whether the string of the first sentence correspond to the string of the second sentence. so for example: first sentence: i will go shopping second sentence: Tomorrow, … |
| | I tried to do this [CODE]ArrayList<String> a=new ArrayList<String>(2); a.add("dss"); a.add("dsfs"); a.add("fsfs"); [/CODE] Though i have specified a limit of 2 on the collection, i am able to add more. If this is general about Collections, is there any Collection which sets a limit and strictly follows it ? |
| | Here is the java code to search for multiple patterns in multiple lines...i m not able to go back to the previous pattern using this code... try tomake an xsl file in the link provided in folder and give the same pattern somewhere in the xsl...and do tell me the … |
 | This is must read if you learned Java before Python: Python Is Not Java: [url]http://dirtsimple.org/2004/12/python-is-not-java.html[/url]  |
| | Please help me =( I'm not native english speaker, therefore some things might be not clear here I have 2 separate files: [B]Main.java[/B] and [B]Open.java[/B] inside [B]main.java[/B] there is a GUI and it has a [B]JTextArea[/B]) where i want to show text (variable) called from [B]open.java[/B] in [B]Main.java [/B] i … |
| | Well, I am actually making a custom 2d turn based gaming engine in Java. So far I have actually gotten a solid based down, the ability to load a seamless game world (no instances) as well as a layered world, with a terrain layer, buildings layer, unit layer then an … |
| | Hi, I'm working on an assignment and, after a significant amount of googling and reading through my textbook, I can't seem to find a tutorial for anything similar to what I need to do. My aim is to produce a tool which draws a line on the screen based on … |
| | I need to write some software to catalog files in a directory hierarchy. The directories of this hierarchy nominally follow this structure: Country City Technology_Type Date Files are then placed under the Date directory. The problem is that until now, files are copied into the hierarchy manually. Occaisionally files have … |
| | Hi, I am building a game in which i have used array for applying 52 button, which works fine.But when i try to use Action Listener with the array of button and try use setEnable(false)or true it does not work.I am also sending my. [CODE] import javax.swing.*; import java.awt.BorderLayout; import … |
| | Hi, I need to show the loading status(wait status) in cursor for all actions. If i perform some action([B]Login[/B]), then go to the backend and perform some process and it will return some value. Here this whole process will be taken some times. Now that time i want to show …  |
| | this is my final code,, would you pls help me get this right java Menu driven code choices only in letters A, B , C [code] import java.util.*; public class Letters { public static void Menu() { System.out.println("Menu"); System.out.println("A. Summary report for a sales employee "); System.out.println("B. Print a pattern"); … |
| | Hi everyone, I am fairly new to programming, but I was wondering if there was a way to run the java program i make when it is not in the bluej compiler (i am using bluej). I would like so that i can double click an icon and my applet …  |
| | Hi, I have a problem in repainting in a JPanel. Situation: I have a ButPanel which extends JPanel. In this panel I draw some sequences with some text along with it, by overriding paint() method. Eventually the screen size exceeds as input increases I use a CompareFrame which extends JFrame. … |
| | Can anyone tell me why I get the following error message when I execute this code: `Exception in thread "main" java.lang.NoSuchMethodError: main` public class Pay { private double hoursWorked = 40; private double rateofPayPerHour = 10; private double withholdingRate = .15; private double grossPay; private double netPay; public void main(String[] …  |
| | Hello everyone! I've been lurking the forum for quite a while and decided to come to get some help as well. :) Right now I'm learning stacks and the like. I have to work on a program to write code to create a program that will use stacks. I'm not … |
| | hi all i want to create an xml file from an array i've been googling but can't find the right one the closest one that i get is in [URL="http://www.higherpass.com/java/Tutorials/Building-Xml-With-Java-And-Dom/"]http://www.higherpass.com/java/Tutorials/Building-Xml-With-Java-And-Dom/[/URL] but it doesn't create an xml file like i wanted to i want to print and create it like c:\xml … |
| | hello there Can anyone please tell how to create 2-D graphs in Java ? (X-axis and Y-axis stuff)  |
| | Hello, I try to do a program that can search whatever the user typed. But I kind of having a problem, which I cannot select everything matches. For example, I type "Hi there hello, what is your name ? please say hello" The I click on the search button. It … |
| | [code]import java.io.*; class Ex4 { public static void main(String[] args) { Console console=System.console(); String input; System.out.println("Please enter the number"); input=console.readLine(); int number; number=Integer.parseInt(input); int sum; sum=((number/10)*10); switch(sum) { case 60: System.out.println("E"); break; case 70: System.out.println("D"); break; case 80: System.out.println("C"); break; case 90: System.out.println("B"); break; case 100: System.out.println("A"); number=100; break; default: … |
| | i am newbie in java programming. So as a beginner, i need to understand technical terms from developers like you. Please answer the question in a way that a beginner like me would understand. I don't like links, i want a definition from you. Thanks a lot in advance.  |
| | how can i execute SQL query from javascript ? or how can i execute javascript from SQL query?  |
| | hello all, i just joined this forum. i actually joined because i am having a serious problem with my program which i believe u can help me solve. i am designing a web based application that authenticates user login using MySql as database, java as programming language and NetBeans 6.5 … |
| | [I]What I have accomplished so far... Design and implement a Nim class and a NimGame application to allow two human players to play the game of Nim. The game starts with four piles of stones. The first pile has 3 stones, the second pile has 5 stones, the third pile … |
 | Hi, i want to do a listener and this is what i have at the moment: [code] class MyListener extends MouseInputAdapter implements KeyListener{ @Override public void mousePressed(MouseEvent e) { if(e.getButton()==1){ out.println("MSE press "+e.BUTTON1_MASK); }else if (e.getButton()==2){ out.println("MSE press "+e.BUTTON2_MASK); }else if (e.getButton()==3){ out.println("MSE press "+e.BUTTON3_MASK); } } @Override public void … |
| | Hi! I'm writing a Java simulation of a physical system. I wrote the whole simulation without any problems and later decided to add very simple GUI to paint the current sate of the system after each iteration. This is where the first problem occurred. After creating my JFrame and JPanel … |
| | We are planning to make a commercial GUI based software (for both desktop and mobile) targeting individual users. We plan to have good web 2.0 like rich application features (Google like dynamic auto suggest, drag and drop, browser based look and feel etc) and lot of user controls (trees, grids, …  |
| | Hi daniweb team, I am new to Servlet concepts can any one tell why peoples use doGet and doPost method in the Same program.And What is the difference between doGet and doPost method. Thank you, With Regards, Prem. |
| | Hello, I am getting "non-static variable friends cannot be referenced from a static context" error msg when I complie this program. If I create TreeSet inside the Names method body there is no errors when compiling and it works but that is not how I want it work. Could someone … |
| | Hi all, I am a student doing a project on the superposition algorithm. I have to rotate 1 protein on top of the other protein after translation to match it as closey as possible. In order to do that, I need to write the codes in java and also, to …  |
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| | I was creating this code and I hit a brick wall. Maybe because I have been doing this code for 5 hours and I am burnt out. I just need help to get it working please. Here is the code [CODE]import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.Random; public class … |
| | Hi, I need help with JSP session. My problem: I have a login page. When a user logs in then, i set a session and its expiration time. So, when the session is expired, the user will be redirected to the login page with a session expired message. I want … |
| | I'm a newbie at java and I need help in coming up with the correct answer for this JOption java program. I enter in 2k, 30fps, 4min, 0seconds, and I should get 10.6842041GB (16.02630615GB total space needed). Please let me know if you have any advice on how I could … |
| | Hi I am trying to ride a program that answers a mathematic equation but I keep getting the the error Exception in thread "main" java.lang.ArithmeticException: / by zero at EquationCalc.main(EquationCalc.java:48) I cannot get around it, does anyone have any ideas? [code]import javax.swing.JOptionPane; /** This program will calculate an equation following … |
| | I am a student, doing a project on superposition(bioinformatics). I am doing the part on rotation using matrices and I'm stuck. I need to open a visualizer (jmol) and adjust the angles of my protein structure at the same time via java codes. So I need to have 2 protein … |
| | Can any one suggest me the java code to find the i/o usage of a process? I am able to calculate memory usage and cpu usage of a process through jav code but unable to do so for io usage. |
| | I want to make a jsp page which checks some condition and if it is not true it should send error response 404 to server.. so that the tomcat server should think that the page is not available... is it possible to do in jsp..??? |
| | Hi All, I need to write a class to draw and add some components on frame like images,rectangles. I have a class which is already written by some other person, and now i need to add 14 adjacent rectangles on the existing frame. [CODE] import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; … |
| | [CODE]import java.awt.*; import java.awt.event.*; import java.applet.*; /*<applet code="actionapplet" width=500 height=600></applet>*/ public class actionapplet extends Applet implements ActionListener{ String msg,str; Button b1,b2,b3; public void init(){ b1=new Button("substract"); b2=new Button("add"); add(b1); add(b2); b1.addActionListener(this); b2.addActionListener(this); } public void actionPerformed(ActionEvent ae) { str=ae.getActionCommand(); if(str.equals("add")) msg="addition is to be performed"; if(str.equals("substract")) msg="subtraction is to be … |
| | Sending one image works, but when i repeat the cycle again it just doesn't work. my Client side code (excerpt): [code] for(int i=0;i<50;i++){//fromServer.contains("image") img = ImageIO.read(in); System.out.println("Got image."); label = new JLabel(new ImageIcon(img)); scrollPane.setViewportView(label); fromServer = reader.readLine(); }[/code]On the client side i have this output [code]Got image. Got image. Exception … |
| | I want to display a player in Jsp page that supports .wav file  |
 | [COLOR=Blue]Hello.... I'm currently using Netbean 5.0 and I just want to add some GIF files to my program when it builds. I'm using the files as icons for some of the GUI buttons and labels. But when I select clean and build main project or build main project and execute … |
 | :S what iz event model??? what is its use n why i shud use dis n not others????? plzz xplain wid eg........ w8iting....:-/:?: |
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