35,618 Topics
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| | I really need help with the computer science class & the tutors at my school do not fit into my schedule. Would anyone be willing to help me with some of my labs?  |
| | Can someone please help me out that how execution of Inter-process communication in java is done, where a single process tries to receive from two mailboxes. I mean the send() and receive() operations? |
 | What is the equivalent of the "setw" stream manipulator for C++ in Java? I've been messing with the java.util.formatter class, but haven't figured this out yet? [url]http://www.cplusplus.com/reference/iostream/manipulators/setw/[/url] |
| | Hi how do you delete the input on the textfield after a button is pressed. Thanks |
| | I need help in creating a RPN calculator! I'm currently stuck in making a stack. here is my codes so for. [CODE]/** * * * */ import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.math.*; public class JavaCalculator extends JFrame{ private JFrame f; private JPanel p1,p2; private JTextField jtfMain; private JButton …  |
| | I wrote a program called Geometry that finds the volume and surface area of a sphere, cone and cylinder. I have to use JUnit 4 Testing to test the separate classes. I have written the following code but when I run the test it says it fails even though my … |
 | How would I get a value in between the two quotes after value=? So, value="hi my name is bob" /> would return: hi my name is bob or value="Ouch! "that hurt" lol..." /> would return: Ouch! "that hurt" lol... so basically I know the value=" TEXT_HERE " /> will always … |
| | Hi, I am suppose to create a code that takes the values between 1-1000 and produces the hailstone sequence for them, then it prints out the initial value that produced the longest sequence along with the sequence's length. I have tried to use an array but it didn't seem to … |
| | Question for you guys, what am I doing wrong here? I am able to enter the 5 digits in one input and I just want it to display the first character; just to test to see if it works. Afterwards I will be displaying all 5 characters like "1 2 … |
 | hi all!! i wanted to know the name of book which covers all the basic syntax and concepts of java keeping in mind that i have the basics of c++. |
| | <HTML> <HEAD> </HEAD> <BODY> <APPLET Code = WelcomePage.class width=300 height=300> </APPLET> </BODY> </HTML>  |
| | Hi guys, hope you can help. I'm creating a mixture of an employee scheduling system with elements of a Human Resource Management System for small to medium businesses. I ideally want to create a java application with a database backend, which I'm trying to see if I can apply sql … |
| | Write a program that tells you if the expression entered is a tautology or not. Assume that you have no more than three propositional symbols in your expressions -- call them P, Q, R. You must use the linked list implementation of the data structures needed. The above is my …  |
| | Hi everyone. I have been using ubuntu for a while now. But this recent upgrade of ubuntu from 11.04 to 11.10 has caused me some problems. Mainly that some java applications are not running properly. I was using Figtree(phylogenetic tree app.) which was working fine until this upgrade. Now everytime … |
| | public class thermostst{ private float currenttemp(); } I thought in java only abstract classes can contain abstract methods like this! I got this from a algorithms and data structures book and im guessing its a printing mistake and currenttemp should not contain the () . Thank You |
| | So both classes are in the folder. How am I able to call variables in one class from another another class. For example, I ahve 2 classes, Class1, and Class2. So in Class1, I have "double a" and its value. How can i refer to this "double a" and its … |
| | Can someone pliz guide me on how to consume jax-ws web services from a gwt app. Or if one knows a good tutorial can post a link. Thanks |
| | Here is a item tablelist.Its a JCombobox.I wrote the itemlistener for it. The problem is when ever i select an item in it for the second time onwards i am unable to see the data in the listScroller in UI,but i can see the data in the console. Ewerything is … |
 | Hi All, I am having a bit of an issue moving back into Java. The issue that I am having is that I am trying to call a method of a custom class that has been instantiated in my main java file from a form that is also in an … |
| | I am having problems with this line of code: --System.out.println(line +"is ranked at" + location + " in popularity amoung girls with" + model.getFrequencyListName(location));-- what it is telling me is that I need an int method for getFrequencyListName, and I have have one but it is for an array. Obviously … |
| | I need some help. I'm trying to create a number pad like a cellphone that captures user input by pressing buttons in a panel on the left and displaying what the user punches in the top panel. Then I have a clear button in the panel on the right to … |
| | Okay, so what I am trying to do is pull user data from a phpBB forum site, basically just what a member's ID is, their "rank", join date, and the other information fields that are generally displayed on their account to the public. The problem is, the site is setup …  |
| | I dont understand how to do this, my teacher suxs at teaching. He's a smart guy, just a really dumb teacher.. Have you ever had one of those teachers? Its a pain. Anyways This is due before 12am tonight..Please Help me solve it::: Create a hangman program. Sample output from …  |
| | Hi guys i am having this exception [I][I]Initial SessionFactory creation failed.org.hibernate.MappingException: Foreign key (FKF5B10F06F8C1E633:detalle_pedidos [pedido_id])) must have same number of columns as the referenced primary key (pedidos [pedido_id,cliente_id,empleado_id]) Exception in thread "main" java.lang.ExceptionInInitializerError[/I][/I] according to this my table pedidos mismatch detalle_pedidos here pedidos pojo [CODE]import java.math.BigDecimal; import java.util.Date; import java.util.HashSet; … |
| | Hi, I'm having an issue with the following directions: public static int aPower(int a) Given a number a > 1, Returns a number n such that for some m > 1 we have a = n ^ m. If no such n exists it returns 0 public static int aPowerOf2(int … |
| | [CODE]import static java.lang.System.*; public class ShipTester { public static void main (String []args) { Ship s1 = new Ship(); s1.setX(3); s1.setY(10); s1.setSPeed(22); out.println(s1.getX()); out.println(s1.getY()); out.println(s1.getSpeed()); out.println(s1);//calls the ToString method Ship s2 = new Ship (3,10, 22); ship s3 = new Ship(5,7 ); s3.setSpeed(19); out.println(s1.equals(s2));//s2 becomes rhs out.println(s1.equals(s3));//s3 becomes rhs } … |
| | Hi, it is kind of a beginner's question... I'm trying to read user's input from keyboard. The user types in: a1 a2 a3 b1 b2 b3 c1 c2 c3 ... in which each line has three integers separated by a space. Every three integers are on the same line. [CODE]Scanner …  |
| | it's my homework and i have no clue what i'm doing. i pay attention in class but i still don't know what's going on! it's a 2 part project, with a cointoss class and histogram class. this is my cointoss class [CODE]import java.util.Scanner; public class CoinToss { private static final … |
| | hellow, i wondering will be able to draw a pi chart with diffrent scetions colored diffrently with out using Graphics2d class....in addition that i want to make it rotating 360 degree.:icon_neutral: |
| | Hi all, I have a serious problem, I made a program in java that prints reports, I made and tested the reports with one printer, but when I used the program in another printer (and another pc) all the fields are printed around 5mm down of the normal position. I … |
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