32,199 Topics
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| | 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!  |
 | 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 … |
 | 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 |
| | hiee friends i wanted to make one apllication i java which ca include maximum java syntax so i can learn it deeply please suggest some ideas and links for it.............thnkss in advance |
 | Write a Java program that prompts for an individual’s age and prompts him/her to pay the price of a train ticket based on the following conditions: If age is greater or equal to 12 but less than 65, Rs 375.75 is charged. If age is less than 12 but greater … |
| | hiee friends i want to do a web application in java for that i wnat some good creative ideas i havent make any web application but i do have knowledge about java so for dng this project where shld i start what shld i refere......plzzz give ur valuable suggestions... thanku:) |
 | import java.io.Console; public class ConsoleDemo { public static void main(String[] args) { Console cnsl = null; String name = null; try{ // creates a console object cnsl = System.console(); // if console is not null if (cnsl != null) { // read line from the user input name = cnsl.readLine("Name: … |
| | value="jdbc:mysql://localhost:8080/mkyongjava" i need to change this path so that it works at my place. where will I get this? <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql://localhost:8080/mkyongjava" /> <property name="username" value="root" /> <property name="password" value="password" /> </bean> |
| | how to do a unit testing on this method? anyone can help plzz? public boolean saveOrUpdateUser(User user) { boolean res = false; try { this.getHibernateTemplate().saveOrUpdate(user); res = true; } catch (DataAccessException e) { res = false; this.logger.error("DataAccessException", e); } return res; } |
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