36,051 Topics
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| | Why compiler gives me error when I call object MyObject ? public class ThisIsClass { public static void main(String[] args) { MyObject loan = new MyObject(); //error should be ThisIsClass loan = new ThisIsClass(); System.out.println(loan.toString()); } } It works fine when I change name of my class to MyObject or … |
| | I'm a beginner to learn java, do you have any books to recommend for java learning? You can also give me some useful suggestions. I have learned C++ previously, will this be helpful to learn java? Here is my blog, <URL SNIPPED> , any comments are welcomed. |
| | I'm trying to deploy an app into tomcat..but after uploading the war file..it the tomcat manager always shows permgen error could anyone help me why is this error occuring..my tomcat server has around 128MB runtime memory and the war file is only around 25MB?? thank you.  |
 | Hi there, Recently I've started using a client called Tribot which allows me to automate playing a game. The Client has been crashing (for example I was running 8 clients simultaniously last night) and one by one, they crashed over time and produced there error logs in the start-up directory … |
 | Java vulnerabilities have hardly been out of the news during the last year. Here at DaniWeb we've covered a number of the stories as they surfaced: [Java in the cross-hairs: the security debate rolls on](http://www.daniweb.com/software-development/java/news/445532/java-in-the-cross-hairs-the-security-debate-rolls-on), [Is Java 7 still insecure? Oracle Patch doesn't fix underlying vulnerability](http://www.daniweb.com/software-development/java/threads/432479/is-java-7-still-insecure-oracle-patch-doesnt-fix-underlying-vulnerability), [Update my insecure Java … |
| | Hi All, I have a Jtable with six columns. I am displaying the contents of my database into my Jtable. Its working fine. But I am facing trouble updating the changes done in Jtable cells to appropriate database cell. In the below code when I tried to edit the First … |
 | I have a INDEX.html and some <DIV>'s that are populated with external HTML-files using jQuery LOAD() Some of the external HTML's also contains Javascripts. Seperately these external HTML's all perform well, when displayed in the DIV the script won't run. There should be a solution to this but I cannot … |
| | is it possible to add and remove elements in ArrayList dynamically while run time from command prompt  |
| | function setDefaultValue(str){ var arrayValue = new Array(); var rowString = str.split(NextRowSepConst()); for (var i = 0; i < rowString.length - 1; i++) { var valueSplit = rowString[i].split(ValueSepConst()); for (var ii = 0; ii < valueSplit.length - 1; ii++) { var a = valueSplit[ii]; arrayValue[i][ii] = valueSplit[ii]; }; }; globalHasDefaultValue = … |
| | hi am building a web application using maven,eclipse,tomcat. after resolving my dependency, am getting this error. anyone can help how to solve this? cvc-complex-type.2.4.a: Invalid content was found starting with element 'http:basicAuthSupplier'.One of '{"http://cxf.apache.org/transports/http/configuration":client, "http://cxf.apache.org/transports/http/configuration":authorization, "http://cxf.apache.org/transports/http/configuration":proxyAuthorization,"http://cxf.apache.org/transports/http/configuration":tlsClientParameters, "http://cxf.apache.org/transports/http/configuration":authSupplier, "http://cxf.apache.org/transports/http/configuration":trustDecider}' is expected. jaxws-web-context.xml here the code where am getting this error: <http:conduit … |
| | So I am trying to get these radio buttons to respond to input but I have searched the internet and can find no code examples to show me how to do this. I also want to get the spinners to function in conjunction with them so when a product is … |
| | Question Presented: Write a program that computes the following summation series using the rational class: 1/2+2/3+3/4+...+98/99+99/100 You will discover that the output is incorrect because of integer overflow. Evaluate the sum using doubles, the Rational class, and the BigINteger Rational class. So far this is what I have come up …  |
| | Hi I am new to this forum and i was just wondering if the following scenario is implementable. Suppose a thread is reading a file and dividing it into chunks of data(lets say in the form of arraylist, where each line corresponds to a value in arraylist). Each chunk of … |
 | I am trying to write a method that accepts the array of houses and a price, priceLimit. The method will return an array of houses for the houses whose price is less than or equal to priceLimit. I want to make a pass over the data to determine how big … |
| | i want to develope a web applin for Repository and Search Engine for Alumni of College as a mini project so what details shld i include means modules and working so my project will small simple but funtionally good...........  |
| | I am using apache james 3 and when i am trying to send a e-mail although it seems that i send the e-mail i have this error at apache james: INFO 00:51:21,527 | james.smtpserver | Id='882742847' User='' Connection established from 127.0.0.1 INFO 00:51:21,608 | james.smtpserver | Id='882742847' User='' Successfully spooled …  |
| | hi all, i install java application with socket server that connect to access database inside the server and i create a client application that connect to the server and send sql statement to be executed by the server . i install the client application on 5 computers the first entry … |
| | i am using the below code for creating the connection to database. connectionURL = "jdbc:oracle:thin:@//testdsfsdfgs:1521/TEST"; conn = DriverManager.getConnection(connectionURL, userName,Password); i want to set the transaction time out. How can i do that. Please some one help. Thanks in advance |
| | I am working on a simpler version of the following question: http://www.cs.ucf.edu/courses/cnt4714/spr2011/prog1.pdf and have simplified the problem in the following manner: SO: input pipe is PIPE4 and output pipe is PIPE0 S1: input pipe is PIPE0 and output pipe is PIPE1 S2: input pipe is PIPE1 and output pipe is … |
| | hi am having problem to deploy my java web application. I'm using myEclipse for spring 10 and tomcat 7. am having these errors: org.apache.catalina.core.StandardContext startInternal SEVERE: Error listenerStart org.apache.catalina.core.StandardContext startInternal SEVERE: Context [/projectname] startup failed due to previous errors Anyone know how to solve this issue? |
| | i just wanted to know for future which language is good php or java thanku..:) |
 | Hello how can i check the divisibility of a number without using % / +... I am new at coding so hope someone can help I think my code sucks ..i read forums and this is the best i can do import java.util.Scanner; public class Divbythree { public static void … |
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 | Hi am very much interested in progrmming with java and my idea is developing a project that can solve linear programming problems for minmisation and maximisation.  |
| | Hi, I have a problem of modifying Jtree font. No matter what I do or make changes in code I'm unable to change the default font. I got the TreeCellRenderer code from some website. Any suggesion on font change would be really helpful class MyCellRenderer extends JEditorPane implements TreeCellRenderer { … |
 | I'm just a beginner please help! BlueJ accepts my code - there are no compilation errors. But when i want to run the program it doesnt do what i wanted it to. It allows the user to answer the questions about the product and price but the skips to the … |
| | I know that you can call this method to delete a row from a JTable: [Code] DefaultTableModel.deleteRow(index); [/Code] I need to delete all of the rows at some point, and this is not working: [Code] for (int i=0; i<dtm.getRowCount(); i++) { dtm.removeRow(i); mortgageTable.revalidate(); } [/Code] I tried revalidating, but that … |
| | import gpdraw.*; public class chemical { public static void main(String args[]) { DrawingTool pencil=new DrawingTool(new SketchPad(700, 700)); double points[][]=new double[4][3]; double theta=0; double vx=0, vy=0, vz=2; while(true) { points[0][0]=0;//x points[0][1]=1;//y points[0][2]=0;//z points[1][0]=.94281*Math.cos(theta); points[1][1]=-1/3; points[1][2]=.94281*Math.sin(theta); points[2][0]=.94281*Math.cos(theta+2.09439); points[2][1]=-1/3; points[2][2]=.94281*Math.sin(theta+2.09439); points[3][0]=.94281*Math.cos(theta+4.18879); points[3][1]=-1/3; points[3][2]=.94281*Math.sin(theta+4.18879); double screenx, screeny; for(int i=0; i<4; i++) { double x, … |
| | I am trying to read user input from console using Scanner but it only reads my first input, and then on my second input it closes my program. Here is my code: import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.security.KeyPair; import java.security.KeyPairGenerator; …  |
 | Hi All, I'm attempting to install Jre7 on my newly installed Ubunto OS. I've been looking [here](http://askubuntu.com/questions/56104/how-can-i-install-sun-oracles-proprietary-java-6-7-jre-or-jdk) and it is telling me to move the unzipped folder to /usr/lib but where is that? In the Terminal I tried finding it by changing directories but to no avail and I'm getting …  |
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| | Hi. Our homework is to use try...catch block in our calculator applet. I don't understand why the "catch" does not work. It will always go straight to the "finally". Here's the code: import java.applet.*; import java.awt.*; import java.awt.event.*; import java.awt.Label; import javax.swing.*; public class clsCalculator extends Applet implements ActionListener { … |
| | i have this class theclass{ int totalavailable; other informations; } and i made a list LinkedList<theclass> where all available rooms The user want to see if two rooms of any of the available rooms that are at the list are availables and produce a result with the available options. for …  |
| | hi everyone does anybody know a good java free ebook. if anybody has it plz send it to me or give me the link. or any sort of programming ebook would do. thanx :cheesy: |
 | Hey! I am learning a bit of jframe, and I was wondering if anyone knew how to make a JScrollPane display an RSS Feed? I have the feed already, I just need to know how to have the JScrollPane display it, thank you! |
 | Im having problems with Tomcat on a red hat virtual box. Tomcat is installed and it talks to java. it work localhost to localhost but when I try to open port 8080 from outsite localhost it wont work. Any ideas why? Im new to Tomcat and JSP |
 | Hi there, so I have a project idea for Java but I have no idea how to start it and was hoping that some of you could point me in the right direction. So I got this idea based on a need that my mom had in her business. I … |
 | Hi all, I would like to create .fxml file for my java project. How do we get javafx .fxml into java Eclipse? e.g. From Eclipse, when I click File -> New -> Other, then the Wizard window pop out. There should have Javafx folder, which will expand and I can … |
| | Hi there, I'm back again and this time I have another question: So I figured out that I have to use Array Lists for my last question, but now, I have another problem: How do I get all the user inputs separated into different strings so that the user may … |
| | hello everyone...hope all of u might understand the problem..i tried my best...Im trying to make a program in java..but i don't know the logic to solve my problem..the problem is "Make a program in java language and take C program as input no need to input body of C program … |
| | In context like **He began to play fatback/swing-based R&B**  |
 | hello all i have table in which there is one column with checkbox i want to it should hide in one frame and i am calling this frame in another frame method at this time this hidden column should be visible please tell me how this will happen |
| | hello friends i like to make screen like windows my computer in which when we click in local disk and then any folder we don't see any new screen it just open all windows in one screen. is it possible to do in java so that we don't call any … |
 | I need to get the value of the primarykey for the most reciently created entry in an h2 database only problem is i cant figure out how to call scope_identity() which is supposed to return a resultSet with the most reciently created key. Here is the function i am using: … |
| | Hi All, I am having a tablespace named Incident which has eight columns . The first column is index which i kept as auto increment. The columns are 1.index(auto_increment) 2.ticket_no (String) 3.date(String) 4.description (String) 5.priority (int) 6.state (String) 7.follow_up (String) 8.status (String) Now i tried to insert test row in … |
| | Hi there, So I am trying to make a program that will allow me to input multiple users and be able to store data under their names. My problem is that I don't know how to make it so that the user can input as many names as he/she wants … |
| | hi all, first i searched the internet and did not find something help me or i did not understand what they say. i have server client program the client send data to the server and the server reply i want if the client did not send data for 2 hours … |
| | I got a string `\x3Cb\x3EHello, World\x3C\x2Fb\x3E` as a webresponse..i think it means `<b>Hello, World</b>` but i don't know how to unescape that sequence into java string..could anyone please help me with this?? Thank you. |
| | Well I am trying to write a simple "polynomial engine" that has two functions: [LIST] [*]simplifyPolynomial [*]solvePolynomial [/LIST] I just don't know where to start:( I can't think of a method to use. I don't think there are any polynomial libraries in java? My question is: do any of you … |
| | how can i make the system (execution process )wait for some periode of time |
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