35,619 Topics
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| | I think the following code should print 26 but it's printing 62 instead. public class gjh { public static void main(String[] args) { int x = 2; x += ++x * ++x * ++x; System.out.println(x); } } So how is this possible? |
| | All, I'm very new to java having done most of my scripting in Javascript and a little bit in other types of programs. I'm basically trying to obtain a script variable and compare it against a condition and return some println messages. Here is my code: String agentType[] = request.getParameterValues("Agent …  |
 | As the title said, how to send text messages from a java program? |
| | In my applcation I have a JText field for entering a phone number. Is it possible to make it only accept numerical characters? Or should i wite a method to alert the user if they enter any other characters into it? Thanks |
| | Bold Text Here ** java.io.ByteArrayOutputStream fos = new java.io.ByteArrayOutputStream (); java.io.ObjectOutputStream oos = new java.io.ObjectOutputStream(fos); oos.writeObject(chmObjSessionKeyValue); //ConcurrentHashMap oos.flush(); oos.close(); byte buff[]=fos.toByteArray(); ps.setString(2,strSessionId); ps.setBytes(1,buff); ps.execute(); //Read object java.io.InputStream in=null; while(rs.next()) { in=rs.getBinaryStream(2); } java.io.ObjectInputStream oos = new java.io.ObjectInputStream(in); java.util.concurrent.ConcurrentHashMap chmObjectSessionInfo=(java.util.concurrent.ConcurrentHashMap)oos.readObject(); CoreLogger.log("Concurrent hashmap object::"+chmObjectSessionInfo); oos.close(); > `Inline Code Example Here`** *Bold Text … |
| | I am trying to run an easy Android ndk app in cpp, but I get UnsatisfiedLink Error for the Generate() function. Any help would be appreciated. I am quite fluent in c++, but my java is a little bit rusty. I have been trying a lot of tips from the … |
| | I have a TreeMap<String, Customer> (Customer is a class I have created). Customer objects hold a HashMap<String, Repair> (Repair is a class I created). I wrote a method to find a given Repair, this is it: public void processFindRef() { if(ref.length() == 6) // ref is the string we want … |
| | Following code is for deleting elemnt from array but it shows NullPointerException at **if(names[k].equals(user))** ... how to remove it!!! public class del_array { public static void main(String s[]) { String names[ ] = new String [10]; names[0]="admin"; names[1]="b"; names[3]="m"; String user="b"; for(int k=0;k<names.length;k++) { if(names[k].equals(user)) { String item=names[k]; for(int j=k;j<names.length-1;j++) …  |
| | hi friends kinldy suggest me a suitable version of linux os which is suitable for java,j2ee programming ,mysql and oracle thanking you |
| | Hi, I am trying to display certain content to certain mobile devices, specifically displaying alternative content to iphone's as they cant play flash. I am currently using the detectmobilebrowsers.com JSP code, to redirect my site from the full version to the mobile site, the code is as follows: <% String … |
| | **alue** I have a Customer class and a Repair class I have a TreeMap(customerDetails) of type <String, Customer>. Each Customer object holds a HashMap(repairs) of type<String, Repair>, the String represents the ref number of the repair. The user of my system types in a ref number, the program searches to … |
| | Hi everyone I am trying to plot the data within the class XYDataset regress, vertically, right now they plot horizontally. Any help appreciated: package brainwavesanalyser; import java.awt.Color; import java.awt.Paint; import java.io.IOException; import java.util.ArrayList; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.plot.DrawingSupplier; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.StandardXYItemRenderer; import org.jfree.chart.renderer.xy.XYItemRenderer; import … |
 | Hi, I am writing a game. Three card brag. The rules of the game are 1.Each player is dealt three cards. 2.The hand is then assigned a rank based on the cards recieved 3. The hand Ranks are 0,1,2,3 4. the hand ranks are then compared and the highest hand … |
| | I'm really confused with this! I have 2 classes, Club and Membership. In Membership I have the method, getMonth(), and in Club I have joinedMonth() which takes the parameter, 'month' - so a user enters a month and then I want it to return the Membership's which joined in that … |
| | Good day to everyone.. First Here is my code so far.. import java.io.*; public class Inventory { public static void main (String[]args)throws IOException{ BufferedReader bv = new BufferedReader (new InputStreamReader(System.in)); String x, z; boolean y = true; int a, b, c, d = 0; do { System.out.println("--------------------------------------------------------------"); System.out.println(" M I … |
| | I got the IndexOutOfBoundException in the following code. but I cannot find where went wrong. import java.util.ArrayList; public class sumArrayList { public static int calculateSumArrayList(ArrayList<Integer> Integers) { ArrayList<Integer> duplicate=new ArrayList<Integer>(); for (int i=1;i<=Integers.size();i++) { duplicate.set(i,Integers.get(i-1)); } return calculateSumArrayListHelper(Integers); } private static int calculateSumArrayListHelper(ArrayList<Integer> Integers) { //first: arrayList size 0 if … |
| | I've been working through an excersise in a introduction to Java book by Deitel and I have a solution to a problem. The program will compile, but I get a message that says, "Exception in thread "main" java.lang.IllegalArgumentException: adding container's parent to itself" Can Someone please help me? Here is … |
| | Hi, I am trying to learn some basic game programming and already made simple pong game so I thought next step could be simple breakout. I already got ball and bat made by Rectangle. How about bricks, also Rectangle? If so it would be easy to break them just by … |
| | Hello everyone,I need some good practise problems in java programming so that i can apply concepts in solving the problems.So any help would be much appreciated.Please refer me to any link or suggest me some book for the same and also I am new to this website so forgive if … |
| | hey guys i have done my codes and its working properly the only thing that's bothering me is that' when i input 52 and 'a' as my name, it wont ouput the right answer (it should be 'a' also) i hope you guys can help me thanks! public static void … |
 | This is driving me crazy. I downloaded netbeans and love it but for the last 5-6 hours i have been trying to figure out why my java programs is not showing images. When i open it with jGrasp the images and everything loads perfect. With netbeans it will not show … |
| | The code i used in JGrasp to show the image is not working in Netbeans The code i used in JGrasp is final ImageIcon icon1 = new ImageIcon("image/money.gif"); JOptionPane.showMessageDialog(null, " blah blah", "Text", + JOptionPane.INFORMATION_MESSAGE, icon1); And if i wanted to show an image in JOptionPane.showInputDialog would it be the … |
| | You are required to write an application called Customer Billing System. This system will calculate water usage charges for a month that has been imposed by Syarikat Air Melaka Berhad. This system will categorise users into residential users and industrial users and calculate the charges based on data entered by … |
| | I want to start a collaboration with just 1 Java programmer (intermediate or pro) for building our own graphics library . I have tools for real-time collaborative code editing (a plugin for eclipse), so you don't have to worry about uploading your code on internet and then I have to … |
| | class Student { // data members private String _studentNumber; private String _studentName; private int _markForMaths; private int _markForEnglish; private int _markForScience; // Set Student Name public void setStudentName(String studentName) { _studentName = studentName; } // Set the student number public void setStudentNumber(String studentNumber) { _studentNumber = studentNumber; } // getNumber() … |
| | I'm trying to parse an XML file in Java using the XOM library. Where i'm running into an issue is when i hit nested elements. So in XOM you start with a root node, and i am able to parse the attributes out of that root node, and the three …  |
| | I'm trying to add the int values of Integer objects within an ArrayList, using a recursion (for the first time). Here's what I have so far: import java.util.Scanner; import java.util.ArrayList; public class SumArrayList { private static int calculateSumArrayListHelper(ArrayList<Integer> duplicate) { if (duplicate.size() == 0) { return 0; } int lastNum … |
| | Hi again, I posted last week about a Go Fish game that I was trying to write - well I've sorted out my past issues and now I'm trying to rewrite my CardPile class (that defines such things as the deck or a player's hand) to consist of an ArrayList … |
 | 0 down vote favorite I am currently making an application to store employee details such as name, id and email address. I am doing this using a HashMap. I am currently having difficulty with a searchByName,id and email address methods. How would i go about writing one ? Here is … |
| | Create a class named Student (class definition program). The class contains: • Private attributes to store values of Student name, Student university and Student mark. • A method named initialize() to assign initial value to the Student name, Student University and Student mark as specified in the parameter. • A … |
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