36,051 Topics
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| | I am trying to create a simple AI (for four in a line). I have looked online and found a few complicated AI's but they were to complex for me. I am trying to use recursion and maxDepth to create an AI to play two moves ahead. public class AIMove …  |
| | So i have a class that takes 2 generics types: public class Something<K,V>.... In another class, i'm trying to create an array of Something objects. how do i do this? i'm getting an error with this: Something <K,V>[] s = (K,V[]) new Object[size]; |
| | Hello, I would like to retieve data into my combobox. I have done this so far but when I click on the button it's not giving me anything: public void displayItem(int data1) { String sql = ("select * from Students limit ?,1"); try { st = (PreparedStatement) con.prepareStatement(sql); st.setInt(1, data1); … |
| | This is the error i get.. Enter employee name: Bryan Enter employee's salary: 123 Enter employee name: Mark Enter employee's salary: 456 Enter employee name: Fajutag Enter employee's salary: 789 Enter employee name: qwe Enter employee's salary: 32 Enter employee name: qew Enter employee's salary: 312 Enter employee name: qew …  |
| | Do you know how to create a java program with gui output?Please help me,it so hard to do..tnx a lot  |
| | Hi, I'm new to junit. I want to create test cases for if condition,loops. do we have any guidelines to write test cases for if conditions.Can any1 explain with an example. Thanks in advance. Lavanya |
 | Hello Im using org.apache.commons.net's FTP object to make FTP transfers. The problem is that when the IP is down (example, the PC is turned off) a exception saying "No route to host" pops up and not only delays my program but gives a nasty error. How can I avoid this? … |
| | Hey, new to java, but trying to build a text-based adventure game similar in gameplay style to the original Zork series. http://pot.home.xs4all.nl/infocom/zork1.html This is not homework. It started as a way to practice what i've learned, but now I am determined to make this work with the simplest code possible. … |
| | So I'm parsing a CSV and trying to create a new object from each record. Using BufferedReader != null runs thru the file just fine. Now I use string.split method to put each line into an array. Ideas on how to use the values in the array to create the … |
| | public void inOrderTraversal(TreeNode node) { if(node == null) { return; } inOrderTraversal(node.getLeft()); System.out.print(node.getKey() + " "); inOrderTraversal(node.getRight()); } I wrote this code for going through a binary search tree and printing out the items in order from low to high. it works just fine but i need to get it … |
 | Good Day i just wanted to ask what does (x1, y1, x2, y2) in g.drawLine in creating a line in java applet.. thanks in advance |
| | [CODE]public class MinDif { public static void main(String[] args) { EasyReader keyboard = new EasyReader(); EasyWriter screen = new EasyWriter(); //Create an array to the length of the specified entry int numItems=keyboard.readInt("Enter the length of the array: "); String[] myArray = new String[numItems]; // Read in the contents of the … |
| | can anyone convert this code to GUI?? I really don't know where to put the GUI codes in it.. :( please help.. :( import java.util.Scanner; //main class public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter the size of the array: "); int … |
| | I've client and server on my wireless LAN , I can easily ping from client to server any time n, similarly i can ping from server to client for one time and after the application is run. I cannot ping again to the client from server. Why this is happening … |
| | Hello, I am struggling to find out what im doing wrong in this code. I am new to programming and i am stuck. Ive altered my original code after finding great help online but i am stuck...again. any help will be greatly appreciated. public class CreateDelivery { public static void … |
| | What are the constraints on the argument values of these two methods, and explain what the method does. int power( int base, int exponent) { if (exponent == 0) return 1; else return (base * power(base, exponent -1)); } int factorial (int n) { if (n > 0) return (n … |
| | if i divide a float value from 0 then i get output:- infinity and then throws NumberFormatException why can anybody favour me. |
 | Hi, How to do the custom FindBugs in Eclipse. I want to catch the specific bus from code  |
| | The problem I am having is in Juno Eclipse. "school.nextString" is being underlined in red to highlight a critical error. The basic purpose of this program is to ask the user a series of simple questions with if loops to determine the output given. Eclipse is handy and gives me … |
| | i wanted to program that is like an musical composition !!!i mean like a musical composer with buttons where each button when pressed gives a different tumes or sounds !! can anyone do me a project on this !! plzz  |
| | I'm creating this in java 4 buttons and output area When the user click button 1 it will show in the output the following 564(0, 0) // 564 is id number and 0 is location in the x axis and 0 is in the y axis 564(2, 6) //using v.move … |
| | Hey guys, I'm trying to make this program that allows a person to set the size of an array to any value they choose. Then, the program will ask the user to input n values to be stored in the array at the corresponding index. Then the program modifies each … |
| | My Android preference (menu) is not opening a new activity. When I click the 'menu' button on the emulator, I can see my 'Setting' option. However, when I click the 'Setting', the setting page is not showing. There is no error and warning. Thank you for your time. I am … |
| | I am having some difficulties getting this code to work properly. I cannot figure out how to correctly return all of my methods because I have the println listed inside the methods. So when I run my program, I get the println's , plus the return value. But I don't … |
| | So I have a question about using methods. Alright, let say I want to create a system of atm and bank. I create a class account that has all related attributes such as acc # and balance and blah. Then I create an ATM class that contain methods such as … |
| | I collected the data off the form and placed it in a bean class, DataBean. JRBeanCollectionDataSource constructor takes Collection as parameter, so i should convert the bean data into some kind of collection, like list, and then pass it into JRBeanCollectionDataSource and pass its instance to JasperManager.fillReport method. In iReport … |
| | //Hey I need some help //Write a JAVA application that displays a traffic light (three circles inside a rectangle with //red, yellow, and green color) and three buttons with red, yellow and green titles. The //application should turn the appropriate light on when the appropriate button is clicked. Two //lights … |
| | Is There Any Compiler like a Cross Compiler Which Can Generate Machine/Executable Code That Can Be Executable On Different OS ? |
| | Hello, I have my JFrame and I want to ve a sliding menu on the side that will not be visible until someone click on a button. I have divided my JFrame into two containers but don't know how to proceed. Something a bit similar to this: http://www.andrewsellick.com/examples/sliding-side-bar/#  |
| | I need help with the if else statement below. I am trying to use branching to determine and drawString to find the longest lines between the points. Everything I try with the branching method seems to give me errors so I have no idea what to do and it is … |
| | Given: Sour extends Blue extends Pan `Pan p4 = new Sour();` Then set of 6 new statements given and asked to choose which ones will compile. They are: 1. `Pan p5 = p4;` 2. `Pan p6 = (Blue)p4;` 3. `Blue b2 = (Blue)b4;` 4. `Blue b3 = (Sour)p4;` 5. `Sour … |
| | hi, when i try to multiply the double value with 100, i got inconsistent o/ps.. here the codes... Case1:- double d=15.025d; System.out.println("d="+(d*100)); o/p:-d=1502.5 Case 2:- double d=16.025d; System.out.println("d="+(d*100)); o/p:- d=1602.4999999999998 and this issue to 17.025,18.025,19.025 & 20.025 also. it suppose to be d=1602.5 right? why these particular o/p and how … |
 | Hi , I am not able to start "apache tomcat 7.0.22" I have double clicked on "startup.bat" file in the bin folder of the apache tomcat folder after that i typed http://localhost:8080/ in my web broswer but i get the following error " Error 102 (net::ERR_CONNECTION_REFUSED): The server refused the … |
| | Hello, thanks for taking the time to read this. I'm working on (what should be) a simple, simple java program, I am very new to java so please bear with me. I'm writing code with a method that takes an array of int values and determines if all the numbers … |
| | How do I put the following output in a table format as shown below in the code? |
| | Dear all, I have declared following two hashmap. `public static HashMap<Integer,String[]> m1 = new HashMap<Integer,String[]>();` `public static HashMap<Integer,String[]> temp = new HashMap<Integer,String[]>();` At starting point of my execution both map will contain key from 1 to 20 and mapped value with it. Means key value pair are same in both … |
| | import java.util.*; public class MyLinkedList { private Node head; private class Node { private String element; Node link; } public MyLinkedList() { head=null; } public void insertAtHead(String ele) { Node curr = new Node(); curr.element = ele; curr.link = head; head=curr; } public void insertAtTail(String ele) { Node curr = … |
| | How do I graph a parabola using an equation where the user can just input an angle and velocity. And is it possible to have an object follow this path? |
| | Hey, I am trying to use a for loop inside a recusive method, but everytime the method runs recursively, the integer in the for loop resets to zero because of the initialization. Is there anyway to keep the integer counting up, and not resetting to zero? Thanks in advanced! |
| | I apparently can't figure out what I am doing wrong....I have been reading all day and googling help but it hasn't helped. Here's what I have... public static void main(String[] args) { ArrayList<Animal> animalCensus = new ArrayList<Animal>(); Scanner input = new Scanner(System.in); //int uniqAnimal = 0; //String animalName; String endList; … |
| | Help me in constructing a MySql Query to retrieve the rows based on datetime column. Below are the conditions: 1)The date difference between today and date in that column sholud be =>2 days. 2)If the day of the date in DB column is Thursday/ Friday then the date difference between … |
| | I have a Date Picker code. Can you help me in constructing the Time Picker . Or can you suggest me some websites/materials to refer Thx in Advance |
| | ** Please Help. When I call this class, it causes the program to stop responding? Actually I used a button must be clicked to start call the class in another class to run it. after I press that button it causes the program GUI to stop responding. I am developing … |
| | Hello everyone, Im new in web development, Im using localhost (XAMMP),I'm trying to make my website which basically allows users to compile and run their submitted java program on my server(my web page).Essentially, I want when the users click a button(upload) they upload file from file source(e.g desktop or anywhere … |
| | I was going to start Apache/Tomcat as root but Ive rethought it and have gone against it. How can I make my web service read/write from "/"? I keep getting permission denied exceptions... |
| | null pointer exception in jdbc how to over come this problem why this null pointer exception is comming in jdbc....... |
| | class ThreeException extends Exception { /** * */ private static final long serialVersionUID = 1L; static int count = 0; public static void main(String[] args) { while(true){ try{ if(count++ == 0) throw new ThreeException(); System.out.println("No Exception"); } catch(ThreeException e){ System.err.println("Three Exception"); } finally { System.err.println("In finally clause"); if(count == 2) … |
 | Hi All, I have configured a spring JPA project but when I deploy and start the tomcat I get the exception nin stacktrace as shown below. org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in ServletContext resource [/WEB-INF/database-config.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are: … |
| | I want to do a project on hotel management. But I can not know how to take the print of the bill of a customer. After I entered data in textfield how to take printout those data in a money receipt format. |
| | I have created an application using swing. On clicking a particular menu item, a form is loaded,and after saving it a pdf generates. For reporting, i am using iReport. Here is the code snippet MyiReportViewer.java package sms.ui.ireport; import java.awt.BorderLayout; import java.awt.Container; import java.io.InputStream; import java.sql.Connection; import java.sql.DriverManager; import java.sql.SQLException; import … |
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