Swing/AWT/SWT :: Trying To Use JFileChooser In Eclipse In Linux
Apr 9, 2014
I'm trying to JFileChooser to open up a window. I'm just trying to learn how to use it for a school assignment this week. The problem is I can't get anything to show up. I can create a new window and print to the console without errors, but JFileChooser doesn't do anything. No errors either.
import java.awt.*;
import javax.swing.*;
public class TestingStuff extends JFrame {
public TestingStuff() {
setTitle("This is a new window!");
setVisible(true);
I'm using a JFileChooser. I'm using a FileNameExtensionFilter which is fantastic, and will let me only show files that are of type .db or whatever. However, I don't want to show the user files that have a type of lock.db or *_trace.db for example, and I can't figure out a way to do that.
I insert a link to a file, that you need to download. After I click the download button and that's performed this action. And how me save the file, where i chose?
private void actionAdd() { JFrame parentFrame = new JFrame(); JFileChooser fileChooser = new JFileChooser(); fileChooser.setDialogTitle("Specify a file to save"); URL verifiedUrl = verifyUrl(addTextField.getText());
I have a swing application that is using JFileChooser. When I click the Open menu item from File menu it should show the File dialog box where user can select the file.This application is running in my machine but encounters problem in another machine. File dialog box is not showing and stack trace shows that NullPointerException is thrown by JFileChooser..My machine is a 64 bit Windows 7 while the other machine is Windows 7 32 bit. Both machine are using java 1.6..To verify if its because of the 32-bit, I tried in another Windows 7 32-bit and the same application is working.
I came across this article [URL] .... which identified it as bug but already fix in 1.4.2_04. Though I am using 1.6, just to make sure I also tried the suggested work around.I put System.setProperty("swing.disableFileChooserSpeedFix", "true"); in my code but still not working...I also tried to add java -Dswing.disableFileChooserSpeedFix=true to the batch file that is launching the application and still not working
Code Sample:
import javax.swing.JFileChooser; import javax.swing.filechooser.FileNameExtensionFilter; public class FileChooserTester{ public Boolean loadMDBFile() { System.setProperty("swing.disableFileChooserSpeedFix", "true"); JFileChooser fc = new JFileChooser();
I am wondering how to do the following:when a user clicks on a save menu item, a save JFileChooser pops up. I would like to have a default file name set in the FileName box on the chooser, similar to what applications like Microsft word has. Right now, no file name will appear until the user has selected a file.I also need to know how to get the text from this box in the case that the user enters a new file name (the getSelection function is not useful here because the user will not have selected an existing file.)
I'm dealing with, change the content pane color of jFilechooser. Color has been changed but the problem is when I open the subdirectory leads errors; Note : It also trigger error when I set default directory; like chooser.setCurrentDirectory(file);
The following error is the result:
Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException at javax.swing.plaf.metal.MetalFileChooserUI$IndentIcon.getIconWidth(MetalFileChooserUI.java:912) at javax.swing.SwingUtilities.layoutCompoundLabelImpl(SwingUtilities.java:961) at javax.swing.SwingUtilities.layoutCompoundLabel(SwingUtilities.java:888) at javax.swing.plaf.basic.BasicLabelUI.layoutCL(BasicLabelUI.java:94) at javax.swing.plaf.basic.BasicLabelUI.getPreferredSize(BasicLabelUI.java:239)
I have a program where I have to open a file and then run a piece of code to do something with it. However since there are different files I want to run different pieces of code depending on the file. I have a JFileChooser setup and it works but I would like to have a something like an if else depending on the file extension.
I don't know if this is appropriate to Swing/AWT, or even if this is a Java issue, but I had quite a shock recently. I have been working on a kind of drawing program in which the user can select tiny control rectangles and drag them around, causing the shape of a polygon to change. (They are not implemented as Java Polygons or Shapes because some are one-dimensional). I have gotten it into pretty good shape, so I exported it from Eclipse, my development platform, into a standalone Java application. In the standalone application, each time I drag the mouse, the redrawing shows nasty flickering, as if it's running too slowly. While I was developing the application inside Eclipse, it ran perfectly, with no flickering whatsoever.
What gives? I'd expect that the in-Eclipse runs would be slower, because they're burdened with extra debugging baggage, while the exported standalone version should run faster. But the reverse is the case.
I have an application that has a text field I want to use Jfilechooser to save or save As the data.
If the file already exisits i want the end user to be able to hit save without the dialog box popping up asking for a file name folder etc, like it would in MS Word etc..
i can't make the [JfileChooser] save text file instead of opening files.that [ComboBox] always don't show me the items that i have inserted in eclipse.
I am trying to install Java on my Debain based Linux OS and can`t seen to figure it out. I first typed "chmod +x jdk-8-nb-8-linux-i586.sh", than typed "./ jdk-8-nb-8-linux-i586.sh" to install it. It started to install, but than it gave my this message: (computer name has been changed)
bobsmith@bobsmiht-OptiPlex-GX620:~/Downloads$ ./jdk-8-nb-8-linux-i586.sh Configuring the installer... Searching for JVM on the system... Preparing bundled JVM ... ./jdk-8-nb-8-linux-i586.sh: 1: eval: /tmp/.nbi-5045119.tmp/jre-7u4-linux-i586.bin: not found Cannot prepare bundled JVM to run the installer. Most probably the bundled JVM is not compatible with the current platform.
How do I fix this? My Linux computer is not connected to the internet, I don`t know if this is a problem or not.
Not a Java editor with a GUI, but and editor for editing Java GUI's (Graphically (With JFrame, Swing etc) (Kinda like FrontPage for HTML only for Java/Linux. You just add stuff / drag objects around and then optionally review the code after..
my project is all about downloading files(text files, music files, etc) from a LINUX server using UI build in java, my mentor told me to use HTTP Client (Java apache), but how to start this.
Here's a sample scenario:
ScreenHunter_1.jpg
Consider the directory structure above.
First, how to connect with this LINUX server using JAVA.
import acm.util.* ; import acm.program.*; import java.awt.* ; class Chap6_ex1 extends ConsoleProgram { public void run() { println("This program displays a randomly schosen card."); int number = rgen.nextInt(1 ,13); int suit = rgen.nextInt(1 ,4);
[Code] ....
I am running the this from a Linux command line , in the cmd first i use :
javac -classpath acm.jar Chap6_ex1.java
end then :
java -cp .:acm.jar Chap6_ex1
The output i m getting after second command is :
Exception in thread "main" acm.util.ErrorException: Cannot determine the main class. at acm.program.Program.main(Program.java:1358)
I know the problem is from the RandomGenerator class in packet acm.util.* but i dont know how to fix the problem . Every other program has worked . What I am missing or how this whole issue of packet importing works when running a java file from cmd ?
I'm running a jar of an application and library jars from lwjgl. I'm creating a java process. It's working on Windows but not on linux.
I tried replacing the semicolons with colons but it didn't work, it just said "Main class not found: Application.natives.linux" or something like that. gamePath is the path the application is in. osName is the name of the operating system.
After a transition of an object the UI is not fully updated. One can still see "lines" from the "movement". This only happens on Linux (Debian) and not on Windows. Is this a known issue that has been fixed in later Javafx releases ? I am still using Java7 because of WinXP support
Picked up _JAVA_OPTIONS: -Xmx10g -XX:MaxPermSize=10g
can get the values for 1.0
java.net.UnknownHostException: home at java.net.PlainSocketImpl.connect(PlainSocketImpl.j ava:195) at java.net.SocksSocketImpl.connect(SocksSocketImpl.j ava:366) at java.net.Socket.connect(Socket.java:529) at java.net.Socket.connect(Socket.java:478)
Visual effects such as Transitions perform very poor on linux "wheezy" compared to windows. I noticed this on different PC's, checked for Java7 and Java8. If the UI contains many objects then the transition sometimes does not even appear.
I do not think this is graphic card related since videos play quite ok.
I use the default ATI driver without Xorg.conf file and installed the xcompmgr
and tried several options, such as
Option "Composite" "Enable" or Option "backingstore" "true" Option "AllowGLXWithComposite" "true"
This did not speed up things, are there other things that I could do to improve the performance ?
I wrote some java applications on my computer, which is 32-bit Ubuntu 12.04 LTS. Could the application run on both 32-bit and 64-bit versions of linux? Or could it only run on 32-bit versions of linux?
I have a Linux Server Debian 7 x86_64 Minimal With java version "1.7.0_65" installed..Its an online Game Server wich Players can join just like other Services.Every 10 - 15 minutes all the players get kicked from the server and get this messege: "internal exception: java.io.ioexception: an existing connection was forcibly closed by remote host"
The players can't join the server for 10 seconds and the server console doesn't show anything for 10 seconds.it doesnt show that the players even left! and when the players try to join they get htis messege: "same nick is already playing"
After 10 seconds everything will work and players can join again and server console say that everyone left and joined..But that happens again after 10 minutes and im losing lots of players because of this error.
