32,199 Topics
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 | Hello, I'm Mirza and I'm in the first semester of an IT university. I like to experiment with Java, and occasionally I run into problems. Now, I've been visiting daniweb for quite a while now, and I've always found solutions to my problem, but this particular problem I just can't …  |
| | link to old post shows code: http://www.daniweb.com/software-development/java/threads/440001/output-incomplete-text-file program to: A. Develop an application that reads your listings.txt file, analyzes the property listed per agent, and outputs a report to an agentreport.txt file. Your application should do the following: 1. Prompt the user for the name of the input file (listings.txt). … |
| | I am finding it difficult to update the `JTable` when I enter a person's name in search button. The program compiles correctly without any errors, but in `SearchActionPerformed` event when the search button is pressed an empty table comes up. Where without search, the table is full of values from …  |
| | I've got this exception after running my project Really don't know what to do! SQLException: No suitable driver found for jdbc:derby://localhost:1527 I've add derbyclient.jar to Library.but I didn't get any different result.I also don't want to create a new database. I wasn't able to attach it here but here are … |
| | Hi, I need to generate a dynamic bar graph in excel.The code is in java and related technologies.On my site when a click a button 'generate graph for selected values' i should to get a bar graph in excel.Since the values selected can change and also the data associated with … |
| | hello i'm trying to code 'Save Button' which saves all the information in a file this is what I did: private void SaveButtonActionPerformed(java.awt.event.ActionEvent evt) { java.io.File file=new java.io.File("File.txt"); try { java.io.PrintWriter output = new java.io.PrintWriter(file); output.print(this.DateObject.getText()); output.print(this.NoteObject.getText()); output.close(); } catch (FileNotFoundException ex) { System.out.println(""); } } the problem is if … |
 | HI all, I am having a little problem with the following program. Here are the files: Player.java: import java.text.DecimalFormat; public class Player { private String name; private double average; public Player(String name, double average) { this.name=name; this.average=average; } public String getName() { return name; } public double getAverage() { return … |
| | Hi, I have something wrong at table_academicMouseClicked() method which results me with a java.lang.NullPointerException error. basically trying to compare the surname in Jtable and look it up on the database to select the corresponing record so that I can set the label to the value from database. So when a …  |
 | Hello, I have some java code I want to port to C++, and first class in the Heirarchy has me stumped. I'm trying to port a simple parsing framework as an exercise to figure out how it works internally, and almost everything in the framework requires, uses, or is `PubliclyClonable` … |
| | Hi, i'm making a server client piant program that send what is painted on the server to the client(and vice versa). this program is supposed to use instruction based transmission of the image. i have a server client program that sends what is drawn on the server to the client … |
| | Hello.. I created a project in netbeans. I have a JFrame form. It has a JTable in it. I want to insert the database data in this JTable. Can you please help me. I would appreciate if you show me a sample code. Please dont tell me to add rs2xml … |
 | ***How To UpDate JTable on Delete Command and if given id don't match with database then a message show "id is not available " My Codes as follows:-*** private void Sf_Reg_delete_ButtonActionPerformed(java.awt.event.ActionEvent evt) { String str2 = JOptionPane.showInputDialog(null, "Please Note that this Reg No is not generated again : ","Enter Reg … |
| | This is my program so far: package allin1; import javax.swing.*; import java.awt.event.*; import java.awt.*; public class Allin1 { JFrame frame = new JFrame(); JPanel panel = new JPanel(); JButton b1 = new JButton("Exit"); public static void main(String[] args) { panel.add(b1); //THIS IS THE PROBLEM?? } } The error I am … |
| | I am unable to execute the editProfile() method in MainMenu class. The purpose of the method is to be able to extract the bean values and display them on the empty textfield. I am not sure if i did it correctly. any recommendations for any changes to editProfile() method. public … |
| | i'm trying to show date in a text field this is what I did java.util.Date date=new java.util.Date(); this.DateObject.setText(date); and its wrong... please help & thank you. |
| | I was trying to set a UniqueIdentifier based on Long. The objective was to give a certain custom Object a unique identifier in order to allow me to store them in a hashmap. I saw someone trying to use the most significant bits. So I realized that the addition of …  |
| | What's wrong with the following code? public void fillByteArray(InputStream s, byte[] b, int offset, Integer numReads, int readAmount){ while (numReads > 0){ s.read(b, offset, readAmount); offset += readAmount; numReads--; } } |
| | My aim is to fill a 3x3 grid of Jtextfield in java swing with values and position of entry in that grid sourced from a text file.I made a file named aa.txt. Its contents are:- a1-3 b3-9 c2-4 a1,b3,c2,... are names of textfields in grid and numbers separated by hyphen … |
| | I am attempting to make a TicTacToe in java using Swing. Instead of using buttons for mark(x and o) placing on 3x3 grid, i used textfield(variable name- pos) to specify position of mark entering and another textfield(var name- val) to take value to insert it into the position which i … |
| | So I have been working on this project for quite some time and I can't figure out why I keep getting an "Illegal Start of Expression" error. I tried moving the variables above the main method and that only returned the same error but instead of the error occuring at … |
| | I have this paint program and i'm having a very silly problem. I'm trying to set the paint area to west position using border layout but when i do that it doesn't show up when i run the program. if i set it in the center it shows up. everything … |
 | class Emp { int name, emp_no, addrs, ph_no, deprtmnt, post, project; Emp(int a, int b, int c, int d, int e, int f, int g) { name=a; emp_no=b; addrs=c; ph_no=d; deprtmnt=e; post=f; project=g; } Emp(int a, int b, int c, int d) { name=a; emp_no=b; addrs=c; ph_no=d; } Emp(int a, … |
| | Hello Everybody, i'm having a problem with my code. I'm making a word reverser program though I'm not that much knowledgeable about java. The output that I'm aiming for is something like this "olleH dlroW" by inputting "Hello World" string. I'm getting the output that I'm looking for when I'm … |
| | Hi. I have a problem with launching my application as applet. The game runs fine as an application. my applet code: package net.viped.breakout; import java.applet.Applet; import java.awt.GridLayout; public class GameApplet extends Applet { Core core = new Core(); public void init() { setLayout(new GridLayout()); add(this.core); } public void start() { … |
| | hello, i have made the code below. however, when comparing the two strings they are not equal when in theory i thought they would be. String word="abc"; String d=""; d += "a"; d += "b"; d+= "c"; if(word==d) { System.out.println("IS EQUAL"); } When i just print out string d it … |
| | I need to write a program that can draw stuff on a frame, let's say, trees. Their IDs, colors, positions etc. are in a **txt file**, line by line, the first word of the line is the name of their type which will be the name of the subclass. These … |
| | Hello I have 5 jtextfield in my jframe with 5 jbitton. I just want to move the cursor from jtextfield1 to jtextfiled2 and then to jtextfield3 and so on when I press tab key. This can be done in C# very easily by setting the tab sequence while designing the … |
| | hello, Iv been trying to write a java program to read an image from a list of images in a file I.E: * File * Filename * Image1 * Filename * Image2 * Filename * Image3 The problem i am having is that the filename's are string objects followed by … |
| | Hey there! I have been trying to get all my JTable cells to be not Editable so you can't change the info displayed on the JTable. It sounds easy to do but I cant seem to do it. Any help would be appreciated Thanks!! |
| | Hi, i want to read the data from text file and write to excel file. if some one has ready code written then please share with me.  |
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