35,618 Topics
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| | Hello, I got a MacBook Pro for college and i'm trying to program on it. It's all good except when i use the robot class, i don't see any key codes or key events for keys such as function, option, and command. Can i use those keys when using the …  |
| | Hi there, I am [B]stuck[/B] with a problem, and don't know where to start. I am given a series of cities, and their locations in [B]longitude and latitude[/B]. The goal is to find the two cities with the shortest distance. I have an algorithm which, given the geographical locations (longitude … |
| | Hello friends.I got some problems with a program I'm developing for a assignment. I want to add a image(background) to my Jframe and add some buttons. I wrote the code. I can load image into the frame but when I create the Jbutton and re-size it to smaller button it's … |
| | [ICODE] I would like to ask assistance how I can retrieve all the scores every game. And how to add the points by not incrementing game 1 and game 2 and so on.. THank you... [/ICODE] [CODE] /* * To change this template, choose Tools | Templates * and open … |
| | Hello, The problem is that some how due to garbage collection timings I am having tradeoff's in my performance. The issue can be generalized as: [CODE] public void loop(BlockingQueue<Runnable> queue) { for(Runnable runnable : queue)//line2 { runnable.run();//line4 if(Math.random() > 0.9) System.gc();//line5 } //line7 } [/CODE] Now normally the queue passed … |
| | I am in situation like I have a class which have two different subclasses. [CODE]public class SuperClass{ String st; public String getSt(){ return st; } } class A extends SuperClass{ } class B extends SuperClass{ } [/CODE] Now I have another method that want to access the getSt inherited method …  |
| | I am facing a strange problem, and seriously I spend lot of time in experimenting different things to get it work but all in vain. I have a JTree whose nodes are been modified by my custom TreeCellRenderer class. My class creates a JPanel for every node and places components … |
| | Hello, I would like to know what is the best way to populate a tree gui which has the following details: My application should reflect a tree structre with about 8000 members but directly under the root there are maximum 15 members.Its clear that each time a user open the …  |
| | Dear experts, Please kindly advise me in how i should write the column operation: The following is the full codes: [CODE]import java.util.*; public class Matrix { public static void main(String[] args) { // declare the necessary variables int N, M; String operator; int index; int sum; int [][]matrix = new … |
| | Hi this is samar here I'm developing a application in which i want that when some one press print button the info in the form get printed I'm developing my application in netbeans 7.0.1 pls help |
| | I have a very stupid question. I use a JToggleButton. now I want to know if the setSelected is true or false. thus an if function, but how to write one because I get errors. thank for your support [CODE]if(Btn2.setSelected() = true){ }[/CODE] |
| | I am developing a desktop based software in Java using IDE Netbeans 7 and database MySQL. Now i want to distribute this software and protect it from piracy.I want to implement online licence verification.That means when user will install the software a number based on hardware configuration will be sent … |
| | I am working on simulation and i need to display data to TextArea or JTable, that is generating continuously at run time. ----------------------------simulation class---------------- Class Simulation() { when Nubmer Generate call method ' updateData' in Frame Class to upload on JTextArea. } -----------------------------------frame class--------------- Class JFrame() { Method updateData(string data) … |
| | Hello all! I am generating a random int between 0 and 75: [CODE] public static int rand(){ int num = (int) (Math.random()*75); return num; }[/CODE] How would I generate the same range of numbers but with a 70% bias for the lower half of possible numbers? I thought I might … |
| | Hi, Im new to java and I can not figure out where I am going wrong in this code. I need to take the value from the arguments in the run configuration. I the values are in args[] array and if there is more than one argument I need to … |
| | Hi, I have an array, and it must be sorted. The array's objects have associating values. For example, an array of city details contains these information [I]per object[/I]: (String) cityName, (double) cityNumber, (int) cityNumberOfPets. [CODE] //e.g. city[0] = ("Chicago", 243.2, 14); city[1] = ("New York", 25.3, 15432); city[2] = ("Dallas", … |
| | Hey guys,when i go to enter the same account number as i am logged into as well as any other account and click ok the error message displays however it does not stop me from progressing to transfer money to myself. I have had a shot at it however as … |
| | I have this code: [CODE]import java.sql.*; import java.util.ArrayList; public class Car { private int id; private String model; private String color; private Double price; public void setId(int id) { this.id = id; } public int getId() { return this.id; } public void setModel(String model) { this.model = model; } public … |
| | Hi, I need to write a system that simulates buying and selling on the stock market with just text outputs. I need to create a menu so the user can register and delete thier account. Also be able to buy and sell shares. So far I have my classes and … |
| | I am looking to create a program that works similarly like wolfram alpha but on a much more basic level. It will use things like weather, directions, restaurants in an area etc. Im looking to some how build this system (elementary) so that it can accomplish something like this: [url]http://www.wolframalpha.com/input/?i=weather+in+new+york+on+tuesday[/url] … |
 | As the title stated i want to show tooltip when the user press up and down keys in combo box, Please any hint ..... Regarding to problem |
| | Hi I am having trouble at finding a way to iterate through a string of alphabets until a digit is reached. e.g. iterating through [CODE] //Using a scanner, I can use scanner.getNext() to get the first word. //There may be more than one word; there is no way to tell; … |
| | Hello. I have tried numerous string permutation methods, and they work, but not for what I need. I need to permute a string such that I don't get any reversals: abcd abdc acbd acdb adbc adcb * bacd badc bcad bcda * see how these are reversals of each other? … |
| | Hi all, I really need your help on this as I am just learning Java. I do have an error message which says "cannot find symbol on line 23. Many thanks. [CODE] import javax.swing.JOptionPane; public class averageRainfall { public static void main(String[] args) { //declare variables String[] Month = new … |
| | hi all, i am trying to do a mini project in java which is totally console based. please suggest me few topics for it... |
| | Dear All, I have read dateTime field into a string from mysql database and in my java I have another dateTime in string format and in same format as the mysql date time and would like to compare both to see which one is before? |
 | Hello everyone, i write mostly in java but have recently started picking up c and c++, and i was wondering if there was an equivalent to the java date class in c++ or c? I've searched for a date.h and came up empty. |
| | Hello, I want to run a java project but I can't run it . you can download here : [url]http://www.persiangig.com/pages/download/?dl=http://fatima10.persiangig.com/document/bankapplication3.zip[/url] The error is : Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException: Uncompilable source code - cannot find symbol symbol: class ResultsModel location: class bankapplication3.Display2 at bankapplication3.Display2.<init>(Display2.java:35) at bankapplication3.Database.<init>(Database.java:9) . . . I'm … |
| | Hi there, I am trying to get the words (city names) from a user input. For example, the inputs: [CODE] String input1 = "Pyeongchang 135135.13 531.351"; //Note: "Pyeongchang" is of one word. String input2 = "New York 3543.25 25352.523532"; //Note: "New York" is of two words. [/CODE] I need to … |
| | I need the dates in a specific range.And i want to get the result in java manipulating from a MySQL database.Now how can i do so. Suppose there are 3 days 17.08.2011,18.08.2011 and 19.08.2011 .I want the dates in the range 16.08.2011 to 18.08.2011 .So how can i manipulate it … |
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