36,051 Topics
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 | Supposed i will input a string like "java"but the display will change instead of "java" the display will change every character and become **** please help.. :) |
 | Hi I have this code that performs error checking on initial values. Everythinbg works good but how would I go about allowing for user input? I am thinkging JOptionPane but where would I add that? public class Date { private final int month; private final int day; private final int … |
| | Hello I am having trouble converting a long (cents) into currency format. My Code: l long doublePayment = 1099; //Should equal $10.99 DecimalFormat dFormat = new DecimalFormat(); String formattedString = dFormat.format(doublePayment); System.out.println(formattedString); Output: 1,099 I also tried: long doublePayment = 1099; NumberFormat n = NumberFormat.getCurrencyInstance(Locale.US); String s = n.format(doublePayment); System.out.println(s); …  |
| | Hi, I don't know what happen all a suden but all my textfiels variable are now underline in red. I have : st.setString(1, t1.getText()); st.setString(2, t2.getText()); st.setString(3, t3.getText()); Where t1,t2 and t3 are my textfields variable name but is says cannot find symbol. Everything was working fine, I don't understand … |
| | Hi, found this code work fine how can we update code, the code is below <script type="text/javascript"> var cal_1 = new Calendar({ element: 'inlineCalendar', inline: true, months: 3, dateFormat: 'm/d/Y', o nSelect: function (element, selectedDate, date, cell) { //do something } }); </script> [[Click Here](null)](http://code.google.com/p/calendarjs/) what we need is, only …  |
 | I need a help with this Java project. And please note that Iam not try to cheating to complete this project,my teacher is give the permission to use any source to help do this project and I'm not plagiarism I will give the credit to the source code in this … |
| | hello, i have this code $divToSubjectShow = "<div id='subjC".$subId."'><div class='boxC'>".$subName."<span onclick='delTempSubject(subjC".$subId.")'>X</span></div></div>"; to store in div innerHTML with js and i get this error > missing ) after argument list any idea? |
| | Dear all, I have stuck with one problem. I have taken one Hashmap, Performing some input operation,remove operation on it. So after performing remove operation, i want value of 2 successive key in two different array. Also i want to match 1st key's value with all other keys' value. Like … |
 | Is there a way to set Max date in Java for the calendar control or restrict the user from selecting the future dates? |
| | Hello I'm new learner in java, and I'm facing a problem to develop a Java application that will ask the user for the time in terms of hour and minutes and display the time by drawing a clock. I have created two classes, and the code is below. Please could … |
| | hey iam writing this code in button's actionPerformed but it doesn't displaying any image . Can you identify what is problem in it??? JFileChooser chooser = new JFileChooser(); FileNameExtensionFilter filter = new FileNameExtensionFilter("Images","jpeg", "jpg", "JPG", "JPEG", "gif","GIF", "png","PNG"); chooser.setFileFilter(filter); if (chooser.showOpenDialog(this)== JFileChooser.APPROVE_OPTION) { File file = chooser.getSelectedFile(); ImageIcon icon = … |
| | Hey guys, its been quite a while since ive posted here :-( Im making a game in java (nope not for school, just for fun) Anyway, ive created some logic for an enemySuicideBomber(spaceship game, prolly not what your thinking) to select the closest location. It works for the most part, … |
| | i want mini project on online share trading in advance java........please help me that how i can made? |
| | When I write in my terminal, java -jar myJar.jar, it gives me an error "Resource Not found res/playNow.png" When I run it in eclipse, it does not give me any errors about this image. My folder in my eclipse is outside my package called res and inside it are images. … |
| | I and my friend are starting aur project based on java . We are planning to create a java based forum software . But we are confused to wheather make it a app on windows communicating a DB server ...Or to make it based on serverlets/jsp etc (somthing like vbulltein …  |
| | How do I access My jar in the mac os terminal. I have a jar in my desc top called System FRONT.jar First, I put `cd desktop` then i put java -jar System FRONT.jar It says unable to access jarfile system Then I tried another jar which does not exist, … |
| | Hi, I have created a table with first column as checkbox. Using the below Code.. TableColumn tc = constructedTable.getColumnModel().getColumn(0); tc.setCellEditor(constructedTable.getDefaultEditor(Boolean.class)); tc.setCellRenderer(constructedTable.getDefaultRenderer(Boolean.class)); tc.setHeaderRenderer(new CheckBoxHeader(new MyItemListener())); I sometimes get stackoverflow exception. Is This beacause of the above code..? |
| | import javax.swing.*; import java.awt.*; import java.text.*; import java.awt.event.*; public class SchoolApplet8 extends JApplet implements ActionListener { double userAmount; double userInterest; double userTerm; int month = 0; double remainBalance = 0; double interestPayment = 0; double principalPaid = 0; JPanel row1; JLabel lblAmount; JTextField txtAmount; JLabel lblInterest; JTextField txtInterest; JLabel lblTerm; … |
| | Hi , Is it possible to have loaders in Swing. By Loaders i mean, showing a loader image with masking on the application till the data is retrieved from DB and displayed in TextArea. Just like we have ajax loaders Not allowing to access other screens in the application with … |
| | My issue is that after public static void Head() { each of the following sets is highlighted red for an illegal start expression error. I've tried moving the bracketts around removing words like static or public. (I'm 3 classes into java). I just need help in getting that issue to … |
| | import java.io.*; public class Mac extends Laptop { public static void main(String r[]) { new Mac().crunch(); } //insert code here } class Laptop { void crunch() throws IOException { } } The question is simple. Insert a code that will make the program compile. Answers are: `void crunch()` or `void … |
| | hi how to convert int into object in java kindly explain me with simple example have a nice time  |
| | I use dr java for linux to run my code. I've been running into a bunch of errors recently while running this simple program. The code compiles fine but whenever I run the java file, I get the error; Static Error: Undefined name here's my code; (I've got two files, …  |
| | Hello everyone. I'm in need of some help on how the compareTo method works. First I'll give you some background about it. This program was written in eclipse and it's a homework assignment. I'm trying to compare two Time objects and see which one is greater. here's the code import … |
| | I have developed a calculator gui using netbeans. I've a decimal button which i want to be pressed only once. Is there anything like single selection for jButton? |
| | Gah. I wrote all this code thnking that it would work properly, but it doesn't. [code] //#13 //Reads N days worth of stock prices,and spits out the highest increase. //Created 6/30/03, 8:38 PM class StockWatcher { public static void main (String args []) { double today = 0.00; //price of … |
 | Is there anyway on how can i get a more accurate coordinates? i'm doing a project for our school, the problem is i dont know how to get the right coordinates that i would like to create. Thanks in advance :) |
| | My application has two parts; a server and multiple clients. This project has its implementation both on Windows(Swing) and Android. The Server sends a song which a client receives and starts playing; more like we watch videos on YouTube; streaming. Sending data in chunks and receiving the same is accomplished. … |
| | Hi, i have a JComboBox in a small java program. if i see the properties of the JComboBox i can see SelectedIndex = -1 SelectedItem = null But i can't the name of each item and i have 5 items normally. Where can i see them in the properties? Thank … |
| | Can any one suggest me the best and free Reporting Tool which supports java Thankx in advance  |
| | I am trying to figure out how to increase array size... let say i created string array that can hold 7 names but the user wanted to enter more than 7... so i am trying to write a program that double my array size with out me changing it manualy …  |
| | I have just started learning java and made an first mathematical interactive program which I wanted to distribute with my friends . But I am unable to run the .jar file . I do the following , I click on export - Runnable.jar - Main.class and select the other options … |
| | i have a file.txt like this : 2X^2 + 5X+3=0 i want to save 2 to variable a, 5 to variable b, and 3 to variable c . . how i can do that . . ? tanks for your help . . |
| | 'm trying to pass a String from one class to another class but the result I'm getting is 'null'. I want to pass the String username from LoginFrame to HomeworkFrame; HomeworkFrame: public void loadSubjects (){ String item; try{ System.out.println(username); Scanner f = new Scanner (new FileReader (username + " " … |
 | I am not sure how to explain this so I will give an example. If I were to have two arrayList like the one listed below: ArrayList<String> java = new ArrayList<String>(); java.add("1"); java.add("2"); java.add("2"); java.add("4"); ArrayList<String> lava = new ArrayList<String>(); lava.add("0"); lava.add("2"); lava.add("5"); lava.add("4"); how would i remove the duplicates, … |
| | import java.awt.*; 02 import javax.swing.*; 03 import java.util.Random; 04 import java.awt.event.*; 05 import java.awt.Color; 06 import java.awt.Graphics; 07 public class actualstuff extends JFrame 08 { 09 private JTextField textField1; 10 public static int index=0; 11 public static Graphics gx; 12 public actualstuff() 13 { 14 Container container=getContentPane(); 15 container.setLayout(new FlowLayout()); … |
| | How do i read a txt file into a char array. what i have so far only give me blank lines String fname = "c:\\game.txt"; char data; int row = 2; int col = 4; char[] matrix = new char[row]; private void openFile() { try { FileReader reader = new … |
| | Hello Guys, We need your recommendation for a good java reporting tool(open source or commercial) which meets the following requirements: 1. Embeddable in java web application(via reporting tool API calls) 2. Low run-time cost 3. Output to pdf/html 4. Has report designer/drag and drop etc. 5. iPad/iPhone friendly(if possible) Thanks |
| | /* For this program you will be working with strings. You are to ask the user to input a string. Then, make (and print out) the "pig latin like" version of this string by using the following rule: 1) words beginning with a vowel (A, E, I, O, U) , … |
| | i m trying to do a music cd databse. i done most of it bt i dont kno how to do the search methord..can any 1 help this is my program import javax.swing.*; import java.util.ArrayList; import java.io.*; import java.io.IOException; public class Cd { public String ArtistName; public String CdName; public … |
| | need help to create an array of CDs, where the data comes from a text file, and then sorts the array content by artist name, then title,releaseyear,length in ascending order of artists name.(2 classes main and Cd ) When sorting is done is written a new fill to disk, with … |
| | Hello all. public class LoginFragmentActivity extends SherlockFragment { EditText e1 = null; EditText e2 = null; Button b; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInatanceState) { View view = inflater.inflate(R.layout.login_layout, container, false); e1 = (EditText) view.findViewById(R.id.reg_email); e2 = (EditText) view.findViewById(R.id.reg_password); b = (Button) view.findViewById(R.id.btnLogin); b.setOnClickListener(new View.OnClickListener() { @Override … |
 | Good day guys, I'm a java EE developer. I'm to do my final year project in java EE but have no idea of something tangible to earn me a good grade. Any suggestions. Would love to get a feedback by the end of the day. Thanks.  |
| | import java.util.Scanner; // Needed for the scanner class /** Chapter 2 Programming Challenge */ public class Wordgame { public static void main(String[] args) { String name; //The user's name String age; //The user's age String city; //The name of a city String College; //The name of a college String Profession; … |
 | Hello I am using Apache derby embedded database: I have been using a system to display records from the database described in "DisplayInstructorAvailableNowJTable.java". it allows the result set to create a model from a prepared statement. I have only uncovered the tip of the iceberg concerning JTABLE. I am not … |
| | All, I am working on my first forms app (using NetBeans). I don't like to mix GUI code with app code, so I have my main class, GUI class and core code class nicely seperated. When the user clicks a button on the GUI form it calls a method in … |
| | How can I programatically and accurately detect the touch/slide made by a user's touch on an android phone? I want this to be used as suppose I have two android devices synced with each other. Both of them have anything opened suppose pdf file, music file video file. Then if … |
| | Hey there! I am a new student that wants to be a GOAT of Developing, I don't know anything about Java. But by watching I downloaded Eclipse IDE for Java Developers but don't know how does it work :D I have also downloaded Java Program or Files from http://www.java.com/ Can … |
| | I am getting the following exception when I am running my Swing Application. But the program continues and does not terminate abruptly unlike general Exceptions Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at javax.swing.plaf.basic.BasicTreeUI.paintRow(BasicTreeUI.java:1399) at javax.swing.plaf.basic.BasicTreeUI.paint(BasicTreeUI.java:1189) at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142) at javax.swing.JComponent.paintComponent(JComponent.java:742) at javax.swing.JComponent.paint(JComponent.java:1005) at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4963) at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4916) at javax.swing.JComponent._paintImmediately(JComponent.java:4859) at javax.swing.JComponent.paintImmediately(JComponent.java:4666) at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:451) … |
 | I am trying to read lines of input from a BufferedReader and output them in sorted order without any duplicate lines. I think that using a TreeSet would be my best option. Unfortunately I don't know how to get my input from the BufferedReader into the TreeSet. This is what … |
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