35,619 Topics
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| | i trying to my background move left if user hit right key. and background right if user hit left key. that way it will look like my player is moving. the problem is that when ever i hold right key, the background waits 1 sec than moves to left. i … |
| | 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 |
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