35,618 Topics
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| | Hello. I have a project for queues simulation to do and I have to follow the MVC pattern. My classes until now are: Client, Queue which represent the Model, Controller, GUI which is the View, and the Main class. If I have those 2 classes representing the Model, how should … |
 | How would you implement "clickable" game elements, like they are buttons. But of course, they can move still.  |
| | Hi, i want to convert a .jsp file to .java file. I read various forums and they said to use tomcat to convert .jsp to .java.I have ran tomcat but it is not doing anything(i cannot write anything). Through command prompt i ran it and it just opens a new …  |
 | write a program that will create a phonebook,wherein you can add **entries in the phonebook,delete** entries,View all entries and Search **entries.In viewing all entries, the user should have a choice,whether to view the entries in **alphabetical order or in increasing ** order of the telephone number.In searching for entries, the … |
| | error: The method paint(Graphics, main) in the type player is not applicable for the arguments (Graphics, main.Display) on line: player_class.paint(g) main.java public class main extends JApplet { Timer timer; Display display_class; Player player_class; /*** init method ***/ public void init() { setSize(800, 400); display_class = new Display(); setContentPane(display_class); }/*** end … |
| | Can any one help me writing code which can only creat three digit random number not two digit or one digit number? Following code creates 3 digti but also creats two and one digit number.. public class random { public static void main (String [] args) { double n = … |
| | my password program can hide keyboard input . its invisible when i type password. But my qus is how can show password input as asterisk (*) can any one help me please? :p my code is here: public void login() { Scanner input = new Scanner(System.in);//create Scanner object System.out.println("\n"); Console …  |
| | What I am trying to do is make a program that reads a txt file and converts the number into a double array. import java.io.*; import java.util.ArrayList; import java.util.Arrays; import java.util.List; public class rocket { public static void main(String[] args) throws IOException, FileNotFoundException { System.out.println(readLines("/Users/Jeremy/Documents/workspace/altitude.txt")); } public static Double[] readLines(String … |
| | i have a sprite sheet(image) and i want to draw on screen. image = sprite sheet image x = player x postion y = player y postion width = player width height = player heigh public class main extends japplet { ... public void paint(Graphics g) { g.drawImage(image, x, y, … |
| | Dear All, I'm developed an application that can read incoming messages. Upto now all its fine, Now my app crashing sometimes and return `NullPointerException`. Please find my error log below. java.lang.RuntimeException: Unable to start receiver me.radhakrishna.buddyreader.TextMessageReceiver: java.lang.NullPointerException at android.app.ActivityThread.handleReceiver(ActivityThread.java:2146) at android.app.ActivityThread.access$1500(ActivityThread.java:127) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1208) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:4441) at …  |
| | I am a beginner in j2ee, I met a problem when retrieving an image already stored in the database. I am using Hibernate and JSP, the code I used is as follows: / / java code: s.setAttribute ("photo", l.getPhoto ()); StringTokenizer st = new StringTokenizer (s.getAttribute ("photo"). ToString (), "/"); … |
| | Tried following code to get timezone conversion and failed. public static String ConvertTmz(String timeFormat, String timeStr, String tmz){ String theTimeFormat="MM/dd/yyyy HH:mm:ss"; if (timeFormat!=null) theTimeFormat=timeFormat; SimpleDateFormat sdf = new SimpleDateFormat(theTimeFormat); sdf.setTimeZone(TimeZone.getTimeZone(tmz)); GetTimeStr(timeStr); GregorianCalendar time=new GregorianCalendar(yyyy, mm-1, dd, hh, mi, ss); return sdf.format(time.getTime()); } Please help. |
| | hi.. iam developing a jsp application. Iam using two columns called open_time and resolution_time. The thing I want is the time difference between two dates but iam unable to do so. please guide me accordingly. Iam using timestamp for the date & time. |
 | I would like to ask on how to do calculations and saving the result and retrieve again just like making a deposit and withdrowal in banking system. i really dont know how to do so.. i am trying to formulate some codes but it just don't work. Pls help. I …  |
| | I would like to ask some help on how to add/subtract a value in java from a certain value in a database. I need this very badly!! PLs HELP. |
| | I have a problem with creating drag and drop in Swing. I have written class that represents the toolbar item here is the code shortened code for it: public class ToolbarItem extends javax.swing.JToggleButton implements IToolbarItem, Transferable, DragSourceListener, DragGestureListener { private ModelEquivalent _modelEquivalent; private DragSource _dragAndDropSource; private TransferHandler _itemTransferHandler; public ToolbarItem(ModelEquivalent … |
 | Hi everyone..I need a little help here.Can anybody teaches me on how to create a class diagram for the process of buying glasses from the viewpoint of the patient. The first step is to see an eye doctor who will give the patient a prescription. Once the patient has the … |
| | Hi, iam new to jsp. actually my problem is with the format of date and time.Datea nad time stored in database are in hh:mm:ss format. but when i am displaying reports, nanoseconds are displaying. please give reason for this. |
| | I am working on a java assignment where I have to get BMI with dialog boxes. I keep getting this error "error: illegal start of expression if (BMI = > 18.5 && BMI < 24.9) " Here is the code. Can someone please help!? import javax.swing.JOptionPane; public class BodyMassIndex { … |
| | how to store 2d array in arraylist? and how to print arraylist? import java.util.ArrayList; public class aaa { public static void main(String[]args) { ArrayList<Integer[][]> aa= new ArrayList(); ???????????? int bb[][] = { {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0} }; for(int y = 0; y < bb.length; y++) //rows { for(int … |
 | hi!guys i hope you all will be fine . Today i want to know from you about the Java Application? According to my views or my knowledge may be i am wrong.There are two types of application in java which is **1. Java Stand-alone Application 2. Java Applet Application** I … |
| | I need help to fix this two errors in the code. Line: 29 The static method isSolvable() from the type LinearEquation should be accessed in a static way. Line: 39,40: The static method getX() from the type LinearEquation should be accessed in a static way. Thank you. // This is … |
| | hi. when a user request hits the ActionForm's validate method (struts)and bounces back, i'm loosing some request attributes that i had set for the page. In other words, if the user inputs some data that don't pass the validate method, the page comes back with a few request scope attributes … |
| | I wrote the following code: package com.chain; public interface Chain { void setNext(Chain chain); void process(int number); } package com.chain; public class ProcessNegative implements Chain{ private Chain chain; public void setNext(Chain chain){ this.chain = chain; } public void process(int number){ if(number < 0){ System.out.println("Negative"); }else{ chain.process(number); } } } package … |
 | Okay so i am trying to code out a canvas that has two complex objects(I have MainCanvas , Human, Dog) and I want to make a piece of the complex object move when i drag it, but i dont know if i need to put in another moving method in …  |
| | i had to do a complete text editor,so i made two different code. the fisrt code is a text editor that open docx file, create new documents , exit, paste , copy, delete, select all, save and save with name. the second code is another text editor that change colour … |
| | hi. The file called test.txt contains names as John Smith Walter H. Kepler Gary Davies and so on.. I need to read only the lastnames from the file so that I can sort it in alphabetical order.For this I read the name as John Smith then go backwards as h,t,i,m,S … |
| | I am using a java program to read lines from csv and insert them into mysql database. Whenever i run my program i discovered i could not insert values into a date field insert mysql if the value comming from the file is null. However if i change the field …  |
 | is there any java programming software that looks like vb6 ? our panelist said on our thesis defense that we must use java for our interface but we dont have any background in java programming, but only vb. please help. thanks |
 | FireEye security researchers are warning that they have [detected a new zero-day vulnerability](http://blog.fireeye.com/research/2013/02/yaj0-yet-another-java-zero-day-2.html) that is being used successfully in the wild against browser clients with both Java 6u41 and Java 7u15 installed. Given that the Java 7 update was only released a couple of weeks ago, this is yet more … |
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