32,204 Topics
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 | just started programing with java, did microsoft visual basic last semester, but java seems more case sensitive, how can i write a program called CheckPassFail, which prints "pass" if the int variable "mark" is more than or equal to 50; or prints "fail" otherwise.***please help***  |
 | Develop a Screen, a Listener, and an Animator. The screen should have a panel in which a filled ball should be continuously moved. There should be four buttons on the screen. Two (2) buttons on the Screen for movement – labeled Left-Right and Up-Down. The movement of the ball should …  |
| | I can't figure out why my java applet is not displaying, I have all of the files in the same folder, and I have java enabled on my browser. Here is the code //java code import java.applet.*; import java.awt.*; import javax.swing.*; /** * The HelloWorld class implements an applet that … |
| | i am drawing two rect in paint method. 1st rect i want to rotate it but 2nd rect i dont want to rotate it. the code i have should rotate only 1st rect but the problem is that when it rotate it missup the x, y postion of rect. this …  |
| | i have asteroids store in arraylist. i want to check collision between player and asteroids. if player get hit than i want to minus one life and move the asteroid backwards so it look like it bounced in to player. right now this code is check for collision between player … |
 | hey there, I have two classes with a one-to-many relationship. For ilustration: public class Customer { Business business; Date created; } public class Business { } Now, when I do the following: new StringBuilder().append("SELECT business FROM ").append(Customer.class.getName()) it works perfectly fine. However, when I include filtering based on created field … |
| | Good day I’m new with JSP, here the problem, I just converting the code from SQL to PostgreSQL, but a problem occur after I change to DataSource ds = (DataSource)envCtx.lookup( "jdbc/postgres" ); and add a scheme to the query. By theory it should be ok but it produce this error … |
 | Hello I am a little confused. I had always thought that a class can have objects from other clases as attributes. My teacher recently told me that this is not true... so I am confused now: if one of the attributes of my class is a String, would that be … |
| | Ok this the problem i want to download the applet or if not i want it as a animation (swf or gif) Go to this website http://www.colorado.edu/physics/2000/index.pl then click applet tumbannails then go to laser (by srcolling) i want all four applets or make into animation |
| | I made this very simple applet just for fun but it doesn't work: package applet; import java.awt.*; public class Applet extends java.applet.Applet { public void init() { } public void paint(Graphics g) { g.drawOval(0, 0, 250, 100); g.setColor(Color.RED); g.drawString("First Applet", 10, 50); } } And heres my HTML code: <html> …  |
| | I have Class called ConnectionDB and in this class I have Main method and another function in the class ConnectionDB,That is private static Connection DBConnectionstring() In this function I have Connection URL ,Drivers inside this function . I want this function to be used in another class (GUILogin) with main … |
| | hello I have a xml like this: <book> <Publication> myPublication0</Publication> <Publication> myPublication<bookName> my book</bookName></Publication> <Publication> myPublication1</Publication> <Publication> myPublication2<bookName> my book2</bookName>asd</Publication> </book> and i want to read through java program and want output like myPublication0 myPublication<bookName> my book</bookName> myPublication1 myPublication2<bookName> my book2</bookName>asd please tell how to get given output |
 | Hey Guys, So I was doin a tutorial and I incorporated it into my code and it works for the most part. The program gives you a list of town names you pick one and hit search. All good so far then the program goes into the database and pulls … |
| | I need help with 2d arrays i've posted the problem here [Click Here](http://www.java-forums.org/new-java/71879-please-help-me-im-almost-there.html) (i've posted the problem on java-forums as well) Could someone please tell me what i'm doing wrong or how i could fix this? Thanks! |
| | Hello all, I'm having trouble writing a spell checker as my recursive function isn't returning what I would like it to. It is meant to chop off the ends of words likes "baker" to bake and check against a predined dictionary. I used recursion for words like "baker's". I have … |
| | str1=new String(data,0,data.Length()) why the zero is used in the string function please explain me the what this line says??? |
| | can anyone send me a link for, free video tutorials for java web component development with netbeans. |
| | in enemy bullet class i am creating two different kind of bullets. 'animationFire' and animationFire2. Enemy Bullet class public void paint(Graphics g) { g.drawImage(animationFire.getSprite(), (int)(x),(int)(y), width, height, null); g.drawImage(animationFire2.getSprite(), (int)(x),(int)(y-30), width, height, null); g.drawImage(animationFire2.getSprite(), (int)(x),(int)(y+35), width, height, null); } In Enemy Class i am shooting the bullets. i am doing … |
| | I am trying to write a server-client application for file transfer: the client written in Java and the server written in C++. Unfortunately I have the following error: "java.net.SocketException: Connection reset by peer: socket write error". Here is my code for client: import java.io.*; import java.net.Socket; public class Proba_binar public … |
| | i have made one program,but it will give none of the port number. Following files i have made **SimpleRead.java** import java.io.*; import java.util.*; import javax.comm.*; import java.nio.ByteBuffer; public class SimpleRead extends SpeedometerExample implements Runnable, SerialPortEventListener { static CommPortIdentifier portId; static Enumeration portList; byte[] readBuffer=null; InputStream inputStream; SerialPort serialPort; Thread readThread; … |
| | Well I need help on moifying my report regarding SearchTree.java(Working with Recursion) "Modify the private report to have an additional parameter which indicates the level of indentation at which the visit should be displayed. The public version of report should be modified to call the private version with an indentation …  |
| | I have a UDP server and need to perform an "all" function. That means when a user sends "all blah blah" the server checks a list of clients and sends "blah blah" to all of them. I've stored the clients in a HashMap and I'm trying to figure a way … |
| | I have written a super class called Parent.java and it was extended to create a subclass called Child.java. The super class can be compiled properly, but when the child is compiled an error is poped up. //parent class package abc; public class Parent{ protected int st_marks=180; } //child class package … |
| | Hello Friends, Can someone please advise me on how to print an array inside of a GUI text field? Thank you, Jim Here is some of my code. /** This private inorder method recursively traverses a binary tree in inorder. @param btree The root of the tree to traverse. */ … |
 | Hey guys, Writing a project for school and having a little trouble. We are creating a social media program and the teacher never taught us to use databases so we have to store all the data in text files. One of the requirements is to for the users to be … |
| | Hi Friends I have just started learning Java.I am getting a problem may be a small one but i coundn't able to figure it out.so here is my Servlet code iam trying to insert data into database after submitting form iam getting **java.lang.NumberFormatException: For input string: ""** I want to … |
| | i am tring to debug this problem for about a week but had no luck in it.  Take a look at this image above. This is how i want the bullets to look like. shoot red lines.  Now take a look at this image above. I … |
| | i got this problem from: http://codingbat.com/prob/p178318 This is the question: > Given a string, return the count of the number of times that a substring length 2 appears in the string and also as the last 2 chars of the string, so "hixxxhi" yields 1 (we won't count the end … |
| | i am new to spring framework. i have learned basic concept of Spring.Now i am trying to simply run one hello world application using spring. i am getting following error.i dont know why? i am using netbeans 7.2 and spring framework 3.1.1 Release. **hello.java** public class hello { private String … |
| | Okay so basically my problem is that I have to prompt the user for a set of floating point values once . If they do not enter the right data type then I have to prompt them again. If they dont enter the right type the second time I quit … |
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