32,204 Topics
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 | 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 …  |
| | 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.  |
 | 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 … |
| | 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 … |
| | 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 … |
| | Hi I want to take input of two variable as integer and than do addition with the two variables. The ans will stored in another variable. The program will repeat after every addition end and will ask for user input of varibles and will do addition again. My qus is … |
 | hello guys im trying to send email from java program but when i pressing the button i get this message: errorjavax.mail.AuthenticationFailedException: failed to connect, no password specified? and here is the code: String username = Username.getText(); String password = Password.getText(); final String username2 = "stefanrafaa@gmail.com"; final String password2 = "my … |
| | Hello, I have a 3d dicom image with .dcm extension and i want to display it using jframe. is there any solution for it..? How's it possible to display the .dcm img in java..? will u please help me..? |
| | error detials: Java Plug-in 10.17.2.02 Using JRE version 1.7.0_17-b02 Java HotSpot(TM) Client VM User home directory = C:\Users\dave ---------------------------------------------------- c: clear console window f: finalize objects on finalization queue g: garbage collect h: display this help message l: dump classloader list m: print memory usage o: trigger logging q: hide … |
| | How to read a specific value from a text file and then save the value in another text file. Example: in data.txt file there is some values. Item Name : m-01 Item Brand : One Man Item size : XXL Item Price : 1000 Item vat : 15% these are … |
 | HI all, I was wondering if anybody can help me to understand this exercise: "A small airline has just purchased a computer for its new automated reservation system. Write an application to assign seas on each flight of the airline's only plane (capacity: 10 seats). Your application should display the … |
| | Hello, does anyone know how i can draw a small handle (square) on the edge of the circle at each quadrant( for e.g at the north,east,west and south quadrants) I used general path to draw the circle, now I'm having difficulties to draw the handles. Here is my code: //class1 …  |
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