36,051 Topics
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| | Hi everyone I need a suggestion on detecting the faults/bugs in a java program. To say I should check whether my program is faultless. Thanks, Varun Krishna. P  |
| | import java.util.Scanner; import java.lang.Math; public class Exercise1 { public static void main(String[] args){ double x,sum = 0.0 ; Scanner scan = new Scanner(System.in); System.out.print("Enter the number : "); x = scan.nextInt(); for(double i=0;i<=(x+1);i++){ Math.pow(x, i); fact(i); double y = (Math.pow(x, i)/fact(i)); sum += y; } System.out.println("The e^"+x+" for "+x+" is …  |
| | I have problem with Java session. I have a TplanServlet where I request values from html form and I am going to create Monday object with createMonday(). So I pass my form to this sevlet if (option.equalsIgnoreCase("createMonday")) { String title = request.getParameter("tpName"); String g1 = request.getParameter("g1"); String a1 = request.getParameter("a1"); … |
| | I have UDP socket as below. I need to send back data to the client. I tried to capture both the ip and port but it shows me as Port is : -1 and InetAddress : null. What can I do to rectify on this? class ReceiverThread implements Runnable { …  |
| | Hi to all, I have following two Applets . import java.applet.*; import java.awt.*; import java.awt.event.*; public class buttonDemo extends Applet implements ActionListener { String msg=""; Button one,two,three; public void init() { one=new Button("One"); two=new Button("Two"); three=new Button("Three"); add(one); add(two); add(three); one.addActionListener(this); two.addActionListener(this); three.addActionListener(this); } public void actionPerformed(ActionEvent ae) { String … |
| | Could someone please help me out. I have an illegal start of an expression error at line 8 in the following code. [code]package untitled5; public class Untitled1 { public static void main(String[] args) { public static void main(String[] args) { int start_system, add_modify, add_modify_animal_data, report, exit_system; int check = menu(); … |
| | Hi, I hope there will be a suitable function or easy way to enable/disable save button until something is really changed in the GUI(frame). My frame consists of several panels, textboxes, Jtable,Jtree e.t.c. How can I design some function until some infomation is manually chnaged by the user to enable … |
| | Hi all! I do the project about seafishing from the boat.Can anyone help to build the interesting storyboard.? Opened for ideas 24/7.Regards. |
| | Hai, I am working with maven bundles deployed in karaf. I want to edit the karaf/etc filesystem config files programatically.. I encounted with configAdminServices way of doing.But don't know how to proceed with that.Does anyone can quote the simple Examples?` |
| | Basically i'm looking for tutorials on how to create your own pert char in java (applet) to show dependencies? Any tutorials on that please? |
 | How can we detect redundant rows.and maintain their count. if the rows are like 11111 11111 10101 11111 the result i want is 11111 4 10101 1  |
| | I am unable to run a Java web application due to apache tomcat server failing to start. I checked in the console and it mentions that the error is Caused by: java.lang.ClassNotFoundException: org.hibernate.Session The apache tomcat server error shows Server Apache Tomcat v7.0.50 at localhost failed to start. The web … |
| | I wrote this code for mutipicate two polynomials but I want change it as it can get two polynomials and then multicipate them for example: input: 5x -2x^2 +x -1 -4 -2x output: 4x^3 -4x^2 -22x +4 public class Polynomial{ public int[b+1]; coef[b] = a; deg = degree(); } // … |
| | Hello guys, I have a project to save an image from canvas to file. I have tried googling for 3 days and nothing works. Can anybody show me how to do it. I have search from this forum and this is what i get. http://www.daniweb.com/software-development/java/threads/436548/saving-canvas-as-image " Create a new buffered … |
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| | Currently JTextField aligns all text to the left side, how do you change it so all text typed into it goes to the right side instead?  |
| | Hi is there a similar as eclipse entreprise workbench free.. i downloaded eclipse but my java programs does not work with this eclipse they were working with eclipse entreprise 2014 but this program is not free..and i m only learning java and sometimes c++ thanks |
 | My friend and I tried to create a team of programmers for doing bunch of work, our main aim is the gaming sector (probably). It was said around the net that it was hard work. So, we decided to plan it from now. I got around 1-3 years(blurry because I'm …  |
| | what im gonna do if two Jtexfield numbers in the calculator? how can i command all buttons numbers put to second textfield?:) -java |
| | recently started learning java, going through the official tutorial and would like to check that the below code is a valid and correct solution to the following exercise ( [exercise 1](http://docs.oracle.com/javase/tutorial/java/javaOO/QandE/creating-questions.html) class Card{ // fields ------------------------------------------------------------------------------------------------------------- private static final String[] SUITS = {"Hearts", "Diamonds", "Spades", "Clubs"}; private static final String[] … |
 | Hi Everybody, I was wondering if there was a way to find the most common letter/number/special symbol in a string. Thanks!! Thanks again in advanced, C++ |
| | I am having two controllers. one is LoginScreenController.java and other is HomeScreenController.java. in loginscreencontroller, i am having button when clicked on that buton it will open homescreen controller. In HomeScreenController i am having TextField and a Ok button.I will fill some data in TextField and click on Ok Button. Here … |
| | I've created a JButton and a Jtextfield in java swing. I want the button to perform the same function as BackSpace key of the keyboard. Is there any means to assign the properties of the the BckSpace key to the button, i.e. inheriting the properties of the key. |
| | Hello, I am facing an issue in struts 1.2 This code is in my JSP file. I am using multi select option. Initially the values will be populated to the multi select box from database through LabelValueBean. While I select one or more options and click submit, the values are … |
| | We just need the save button to save to a sql database. This is done other than that. it is saying, "Error: No suitable driver found for jdbc:derby:charityDB;create=true" import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; // Event listener import java.text.NumberFormat; import javax.swing.*; // GUI building import java.io.*; import java.sql.*; // JDSB … |
| | Question :create a n application containing an array that stores 20 proces such as RM2.34, RM7.89 and so on. The application should display the sum of all the prices , display all values less than 5.00 , calculate average price and display all values higher than calculated average. Requirement : …  |
| | Hi, I am having Two controllers One is LoginScreen and other is HomeScreen. In Login Screen i am having one TextField(txtData is variable name) ane one button (btnOk is var name). On clicking ok button it will open HomeScreen. In HomeScreen i am having One TextField(txtFill is var name) and … |
| | Hi , I am totally new to Java . I need someone to provide this question with code answer so that I can learn from your code . Thank you. Question 1 : Store 20 integer employee ID numbers in an integer array and 20 corresponding employee last names in …  |
| | please someone tell me how to change the size of the button.the code: JButton button1 = new JButton(); JButton button1 = new JButton(); public Mainmenu() { setLayout(new FlowLayout(100,278,158)); Icon button2= new ImageIcon(getClass().getResource("button1.jpg")); button2=new JButton(button2); add(button); Icon button2= new ImageIcon(getClass().getResource("button2.jpg")); button2=new JButton(button2); add(button2); HandlerC hand = new HandlerC(); button1.addActionListener(hand); button2.addActionListener(hand); } … |
| | Hi i m new in java i want to create one to many objects it depends of the user how many objects he wants to create for a test the user can put a name and age then these entries will be saved to a hasmap then to a file … |
| | Hello, I have two programs: a) Server.java : Using a JFileChooser, selects a file and then sends it to Client. b) Client. java: Displays the file. My problem: I am able to send a file from server to client only once. The ObjectOutputStream.writeObject() does not work after that. I later … |
| | I'm working on a project on my own and wanted to create an JComponent or JFrame that looks like the following screenshot.      Here is its layout.   I would appreciate it if you showed me by an … |
| | I have done most of the topics in core java.But i feel for web development u have to do advanced java.Then struts then hibernate.I have heard that c# is almost same as core java(j2se)so shall i proceed with .net because i have heard its not that lengthy and u have … |
| | private static Scanner scanner; import java.util.Scanner; public class Dfs { public static void dfs(int a[][],int m[],int i,int n) { int j; m[i]=1; for ( j = 0; j < n && i<n ; j++ ) { if ( a[i][j] == 1 && m[j]==0) { dfs(a,m,j,n); } } } public static … |
| | HI please can you run the code as attachement..i m trying to test the guess number ..if it is greater than the random number or smaller but when it is equal the function will return -1 i have error that i cannot understand as i m new in java the … |
| | So my server sends information and receives information. I know this because i tested it on the local host. The problem is that the portion it receives comes out with little squares after the user input. Here is a picture of the problem. [url]http://img706.imageshack.us/img706/3342/outputc.jpg[/url] [url]http://yfrog.com/jmoutputcj[/url] Thank You Server Code: [code]import … |
 | For inputs A and B (integers) find number of possible integers X such that S(x^2)=S(X)^2 where S(x) is the sum of digits of X.......A<X<B  |
| | I'm trying to create a JTextPane that has the following properties: 1. Vowel letters are colored in green 2. Consonants are colored in blue 3. Numbers are colored in red 4. And the maximum number of characters is 26 and all characters are in Upper Case To achieve this I … |
| | I have a text file transa.txt .I want the contents of the file to be filled in the array cell by cell.example the file reads: 1 1 1 1 0 0 1 0 1 1 1 1 so i want arr[0][0]=1,arr[0][1]=1,arr[0][2]=1...... Can someone please help me with this..I am stuck … |
 | Hi all, I have deployed an application(.war) in jboss6 in linux machine. Now I am able to access the url inside network. If I want to acces the same in internet (out side the network) what should I do . Do I need to follow some other technique to deploy. …  |
| | Hi All, I have come across Read and write method from InputStream and outputstream but im finding it hard to understand the logic behind it. Below is a simple example which reads a jar file from input stream and writes it to output stream. Please explain the logic on how … |
| | Here i have this code which read from a text file and fills the 2d array.Then calculates the sum of each column.I want all those column names whose sum is greater than 5 to be written in output file. /* * To change this template, choose Tools | Templates * … |
| | I have this array Array myArray = {1,2,3}; I want to print the output of the array as follwoing 1,2,3 but when I do this for(int i=0 ; i < myArray.length ; i++){ System.out.print(myArray[i]+","); } however I get this output 1,2,3, how can I get rid of the last comma  |
 | A parking garage charges a $2.00 minimum fee to park for up to three hours. After three hours, the garage charges an additional $0.50 per hour. However, the maximum fee will be $10.00. No one can park over 24 hours. This is what I have: public double calculate(double hours){ if(hours … |
| | one of my goals for this year is to learn java, and I found an excuse to get started lately. So over hte last couple of hours I have been reading tutorials and the likes, and started following the advice from this post http://www.daniweb.com/software-development/java/threads/99132/starting-java-java-tutorials-resources-faq As such I am up to … |
| | Hello everyone I have created a java program using jsch0.1.50.jar to remove the directories in the sftp server. But I could not remove the folder "03-03-2014" as it contains a subfolder named "1837hrs" when I try to run the program I am getting the following error: > 4: The directory … |
| | Hi guys. I have this code disturbing me and I don't know how to sort it out, can somebody help me out?I want to load data from mysql database to these text boxes on selection of Input_id and every time I change the Input_id, the data should also change. Code … |
 | Write a Java application that prompts and reads a value representing the radius, of a circle, then prints the circle's circumference and area. I do not know where to start |
| | Hello, I have a Client/Server program where the Server sends a string with a time delay using a Timer object to the Client. The Client has a JFrame with a JTextArea for display. When I test the Client program, I ran into two issues: a) Nothing ever shows up on … |
| | Hi, Im just new to this language and I would like to know what does this groovy regular expression match too. I was not able to figure it by online articles.if some would would give an explanation i would greatly appreciate. the 3 regular expressions are : static propertyPattern = … |
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