32,204 Topics
 | |
| | how do i add multiple pane in frame dynamically that is in my frame there is one text box which take value from user when user click on ok button i have to add that much panel in jframe how do i do that ? |
| | I can't figure out why I get the NullPointerException on Line 223. Would appreciate any help whatsoever. Sorry about the spacing below. Some of the code appears messy. Toggle Plain Text and it should look better. [CODE]/* Section 1: Import Statements. Imports the Scanner class and the IO Package. */ … |
| | Hi folks So I'm developing a small game for a homework question. I have 3 classes. Apart from the main class, my drawing class draws on screen the objects for my game, like so.. [CODE] public void bat(Graphics g) { //draw the bat g.setColor(Color.ORANGE); g.fillRect(batX, batY, breadth, batLength); g.getClipBounds(); } … |
| | can anyone tell me how to get out of the error Connection refused: connect thanks in advance |
| | Hi Guys well what I am trying to do is set a background image for my program where my labels, buttons , and text areas sit in front of the background. Everything I try I try I cannot get it to work. My jframe layout is below so any help … |
| | Hi, I am new to java and I need to work with arrays. I have found some tutorials, but everywhere was something like [CODE] int[] anArray; // allocates memory for 10 integers anArray = new int[10]; [/CODE] But what if I dont know how long the array will be? When … |
| | hey everyone, I'm trying to perform a program that will perform a leap year method and also have it to loop. here's what i have so far: import java.util.Scanner; public class LeapYear { //Create a Scanner object for keyboard input. static Scanner keyboard = new Scanner(System.in); //Set variables public static …  |
| | I have a requirement to copy files from a temporary file directory to a unix file system using scp. Please provide me a sample code for this  |
| | Can someone help me on how to draw a dynamic pie chart in java? I don't want to use jfreechart. I want to use jtable or other methods if available(but simple one) I have one but it is static.i need to write it upon user input.how can i do it? …  |
| | I am trying to cast combo box to string but I have problems with it. I get NullPointerException? [CODE] fontStyle = (String)combo.getSelectedItem(); size = (String)comboSize.getSelectedItem(); if (fontStyle.equals("Regular") && size.equals("10")) { Font font = new Font(Font.SANS_SERIF, Font.PLAIN, 10); text.setFont(font); } [/CODE]  |
| | run: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at com.sun.java.swing.plaf.nimbus.NimbusStyle.init(NimbusStyle.java:418) at com.sun.java.swing.plaf.nimbus.NimbusStyle.validate(NimbusStyle.java:359) at com.sun.java.swing.plaf.nimbus.NimbusStyle.getValues(NimbusStyle.java:927) at com.sun.java.swing.plaf.nimbus.NimbusStyle.getInsets(NimbusStyle.java:605) at javax.swing.plaf.synth.SynthStyle.installDefaults(SynthStyle.java:896) at javax.swing.plaf.synth.SynthLookAndFeel.updateStyle(SynthLookAndFeel.java:275) at javax.swing.plaf.synth.SynthLabelUI.updateStyle(SynthLabelUI.java:53) at javax.swing.plaf.synth.SynthLabelUI.propertyChange(SynthLabelUI.java:232) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339) at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276) at java.awt.Component.firePropertyChange(Component.java:8128) at java.awt.Component.setName(Component.java:935) at javax.swing.plaf.synth.SynthComboBoxUI$SynthComboBoxRenderer.getListCellRendererComponent(SynthComboBoxUI.java:409) at javax.swing.plaf.basic.BasicComboBoxUI.getDisplaySize(BasicComboBoxUI.java:1334) at javax.swing.plaf.basic.BasicComboBoxUI.getMinimumSize(BasicComboBoxUI.java:903) at javax.swing.plaf.basic.BasicComboBoxUI.getPreferredSize(BasicComboBoxUI.java:892) at javax.swing.JComponent.getPreferredSize(JComponent.java:1634) at javax.swing.GroupLayout$ComponentSpring.calculateNonlinkedPreferredSize(GroupLayout.java:2944) at javax.swing.GroupLayout$ComponentSpring.calculateNonlinkedMinimumSize(GroupLayout.java:2930) at javax.swing.GroupLayout$ComponentSpring.calculateMinimumSize(GroupLayout.java:2897) at javax.swing.GroupLayout$Spring.getMinimumSize(GroupLayout.java:1315) at javax.swing.GroupLayout$ComponentSpring.calculatePreferredSize(GroupLayout.java:2904) … |
| | hi i have another network problem! when i close the socket in server side or the client side i get connection reset exception and then i'm not able to reconnect without resetting the server then start the client again, so how can i close a socket and reconnect without resetting … |
 | Guys can any one help me in JAVA? how does it help in making softwares? |
| | Hi, i have the following code in Java as you can see there are a lot of code repetition. I want to know how i can loop this part of code instead of writing it each time? [CODE] g.setColor( Color.black ); g.fillArc( 110, 80, 300, 300, 0, valint[0] ); g.drawString("BMW", … |
 | What is the best way to start/stop/restart Apache Tomcat using Java code? If it cant be platform dependent (or complicated or I have to do a "IF" for each), then only for Windows. Thanks |
| | Hi the project i have is Write a program that displays diamonds as text using a character provided by the user. For example, a diamond of height 6 constructed from asterisks will display as follows: __* _*** ***** ***** _*** __* (I cant make it line up perfectly... ) after … |
| | I do the program to practice what I have learned in a class at my university(convert input of infix form to post fix one), but my program doesn't run correctly. Please help my to find out my bug. == IntoPost class /* * To change this template, choose Tools | … |
| | I have the following piece of code. I do not understand why its not working. I'd really appreciate help on this. [CODE]import java.util.Scanner; import java.io.*; class ReadFiles { String [] codes = new String[99]; int i = 0; private Scanner readCodes; public void openCodesFile() { try { readCodes = new … |
| | This is just a part of a program When my code asks me Enter diamond size ("short", "average", or "tall"): how do i make it so that if i don't put anything and press enter it asks me exactly same questions again?? i tried putting input.length() == 0 or input.equals("") … |
| | Hey, I'm trying to store data in a record store then sort it, but I'm getting weird results when I try to add anything to the recordstore object... I was using a for loop to add records, and I noticed that the recordStore contained way more records than I added. … |
| | please help me with my codes, it doesnt work somehow [CODE]import java.util.Scanner; public class calculateE { public static long factorial( int n ) { if( n <= 1 ) // base case return 1; else return n * factorial( n - 1 ); } public static void main( String [ … |
| | [QUOTE]i am trying to implement a fitness function for GA. i got a code written in python. i don't have any idea about python. can someone help me to convert it into java the code is here [/QUOTE] [CODE]# there are many ways to do an eigenvalue decomp, this is … |
| | i Write a program to check whether a matrix is an identity matrix but i do not know how to find it plz help me this my code [CODE]package javaapplication162; import java.util.Scanner; public class JavaApplication162 { public static void main(String[] args) { Scanner input = new Scanner (System.in) ; int … |
 | hello ! basically i am working on .net , but now i want to learn java , is there any software like visual studio for .net .if yes then please can any one tell me or provide me any helpful link. Best Regards M.Waqas Aslam |
| | What (if anything) is the difference between these two? [CODE]String[] sa = {"ABC"}; String[] sa = new String [] {"ABC"};[/CODE] |
| | I'm creating a program which has data in the linklist. I'm trying to print out the element in the linklist from head to tail and tail to end, but for some reason, I run into some compiler error. I don't know why it won't let me call the hasPrevious and … |
| | GUIdancer 3.2, the latest version of flagship automated GUI testing tool from Bredex, now "officially" supports Windows 7 and Vista, and includes additional enhancements to its library of pre-built test actions. It began shipping on Nov. 3. Before you decide that US$5785 is too much to pay for an automated … |
| | Hi everyone, I am working on a problem as follows: Write a program that draws a circle with radius 100 and center (200, 200). Ask the user to specify the x- and y-coordinates of a point. Draw the point as a small circle. If the point lies inside the circle, … |
| | Hi Guys, I'm looking the syntax for a input mask that will allow me to input 1.23, 12.34, 123.45 into the JFormattedTextField i found something like ###.## but that doesn't work but something like ###-## wud work. just wondering if anyone knows how to do this with a mask or … |
| | Can anyone assist me with the GUI for this program. I have tried several times will little luck. Here is the source code. Any help would be greatly appreciated. [CODE]import java.text.DecimalFormat; import javax.swing.JFrame; public class Inventory1 { public static void main(String[] args) { // Information on the Cds used Cd … |
The End.