Hi I am trying to make one pane that shows something like windows explorer in my computer.
when user complete it's operations, and after that when he want to save edited image at specific place on disk then he can easily select directory from that pane.
i want to design something like this :
is it possible to do something like that ?
my picture editor looks like :
at right side of editor i want to put something like output directory selection pane.
is anyone know how to do that ?
A complete example using JTree is examined in FileBrowser.
An alternative using Outline is shown here.
Yes its possible. It's basically just JTree.
You will probably want to take a look at File#listRoots, File#isDirectory and File#listFiles.
You'll also want to take a look at How to use trees.
You'll probably also want to take a look at FileSystemView#getSystemIcon which will allow you to look an appropriate icon for the given File
However, it might be simpler to just use a JFileChooser ;)
You could have a look at JFileChooser.
You can use this object to open a SaveDialog and get a save path on the local harddisk.
Then eventually use an ObjectOutputStream to write a file.
Sample code:
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
// Demonstrate "Save" dialog:
int rVal = c.showSaveDialog(fb);
if (rVal == JFileChooser.APPROVE_OPTION) {
System.out.println(c.getSelectedFile().toString());
}
This can be handled with a JFileChooser, sorry if it's not the solution you're looking for
Note: you say choose a directory but I assume you mean that they can name their file
private File selectSaveFile() {
JFileChooser fc = new JFileChooser();
fc.setFileFilter(new FileNameExtensionFilter("File Type", "txt"));
fc.setCurrentDirectory(new File(System.getProperty("user.home")));
int returnVal = fc.showSaveDialog(frame);
if (returnVal == JFileChooser.APPROVE_OPTION) {
return fc.getSelectedFile();
}
//the user didn't click save if we are here
return null;
}
Related
I am trying to open a JFileChooser dialog to let the user decide his wish-directory for following operations.
Following is my current code:
JFileChooser chooser;
if(pref.get("LAST_PATH", "") != null){
chooser = new JFileChooser(pref.get("LAST_PATH", ""));
} else{
chooser = new JFileChooser(home_dir);
}
//chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
chooser.setAcceptAllFileFilterUsed(false);
int retVal = chooser.showOpenDialog(frame);
System.out.println("getCurrentDirectory(): " + chooser.getCurrentDirectory().toString());
home_dir is a static String pointing to the users Download-directory.
The behaviour I do not understand:
home_dir = C:/Users/Scy/Downloads
Press OK without selecting any file(Or directory)
Output: C:/Users/Scy
home_dir = C:/Users/Scy/Downloads
Select any file within Downloads
Output: C:/Users/Scy/Downloads
Why do I not get the full-path(C:/Users/Scy/Downloads) as output when not selecting anything and just pressing OK? (With DIRECTORIES_ONLY activated, can't press OK without selecting anything without DIRECTORIES_ONLY)
Edit: I just noticed that when I just press the Cancel button without selecting anything the output is indeed what I expect, C:/Users/Scy/Downloads.
Based on an answer on this post I tried the following:
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File(home_dir)); //home_dir = "C:/Users/Scy/Downloads"
The result was exactly the same as above. Pressing the Cancel button results in the full path output, while pressing OK/Accept results in C:/Users/Scy.
Maybe the 'selected file'(or directory) is in the 'current directory' (which you are retrieving atm.)?
If you want the current selected file, chooser.getSelectedFile() is what you are looking for. Keep in mind that when switching to DirectoryOnly mode this method will return a directory (e.g. a File instance representing a directory).
The method chooser.getCurrentDirectory() will return the parent directory of the current selected file which explains the unexpected results. (getSelectedFile.getParentFile() will most likely return the same file)
If you are trying to retrieve the parentDirectory, you set the starting directory incorrect. Notice how you pass in the first constructor a selected File? This means in the second constructor the 'home_dir' will be the selected File. If you only want to set 'home_dir' as starting directory, you should use the no-args constructor and call chooser.setCurrentDirector(new File(home_dir)) instead. Here is a snippit of what your code could look like:
JFileChooser chooser;
if(pref.get("LAST_PATH", "") != null){
// set last SELECTED file/directory path.
chooser = new JFileChooser(pref.get("LAST_PATH", ""));
} else{
// set currentDirectory, but dont select anything yet.
chooser = new JFileChooser();
chooser.setCurrentDirectory(new File(home_dir));
}
getCurrentDirectory() returns a directory name, not a file name. If the user selects a file, this method returns the name of the directory which contains that file. If you want the name of the file which was selected, you should use getSelectedFile(). If you haven't yet, you should read this Oracle tutorial on file choosers.
I want to change the default directory of my JFileChooser to "My Music" on Windows.
This directory is C:\Users\Fre\Music on my account because my username is Fre
The default is set on C:\Users\Fre\Documents (depends on OS i think).
How can I change this?
You can use the API method setCurrentDirectory when initializing your JFileChooser objects:
public void setCurrentDirectory(File dir)
Sample usage might be like:
yourFileChooser.setCurrentDirectory(new File
(System.getProperty("user.home") + System.getProperty("file.separator")+ "Music"));
why don't you just give the FileChooser the path when you create it, like:
JFileChooser chooser = new JFileChooser("C:\\Users\\Fre\\Music\\");
Sorry for taking your time,
Just found the answer myself:
String userhome = System.getProperty("user.home");
JFileChooser fc = new JFileChooser(userhome +"\\Music");
JFileChooser openFile = new JFileChooser("C:\\Users\\Fre\\Music");
Creating all your own code, so as to set a default file directory is unnecessary and lengthy. A much easier and quicker way of doing it is by just right clicking on the File Chooser itself on Design view and right clicking 'customise code'.
Customise Code for File Chooser
This will show you the vital code for that GUI component. From the drop down box next to the top line of code, select 'custom creation'.
This will allow you to customise what fileChooser = is assigned to. Between the curly brackets JFileChooser() you can either hard code in the file directory with speech marks like this.
JFileChooser("C:\Users\user\Documents")
or type in a name that for a variable you created earlier. This variable would hold the file directory. I would recommend the latter option, though either will work fine.
Hope this helps.
p.s. sorry about having to use a link for the photo. I don't have enough privilege yet.
You can Change the default directory of my JFileChooser to "Directory you want" on Windows
JFileChooser fileChooser = new JFileChooser();
fileChooser.setCurrentDirectory(new File("put here your directory"));
int result = fileChooser.showOpenDialog(getParent());
if (result == JFileChooser.APPROVE_OPTION)
{
File selectedFile = fileChooser.getSelectedFile();
jTextField.setText(selectedFile.getAbsolutePath());
}
Pretty Simple:
JFileChooser browseImageFile = new JFileChooser("User Defined Directory");
After a bit of googling I'm not seeing this turn up much. Is there some "generic" way to forces the user to select a file that "already exists"
I could add something like
http://coding.derkeiler.com/Archive/Java/comp.lang.java.help/2004-01/0302.html or like JFileChooser with confirmation dialog but is there some canonical way?
Thanks.
First you need to check if your better option is choser.showOpenDialog or showSaveDialog
Save Dialog will let you select any name in the specified path it could be a non existent file, but open will always accept the selected file.. and you can safely add a file.exists() to ensure the file exists. You can also change the text of the buttons.. dialog.. etc..
JFileChooser chooser = new JFileChooser();
chooser.setApproveButtonText("Save");
int result = chooser.showOpenDialog(null);
if(result == JFileChooser.APPROVE_OPTION){
File selection = chooser.getSelectedFile();
//verify if file exists
if(selection.exists()){
//you can continue the code here or call the next method or just use !exists and behavior for wrong file
}else{
//System.exit(0), show alert.. etc
}
}
Sounds like you want an "Open" behavior, but a confirmation button that says "Save" instead of "Open".
You can do this via this method:
http://docs.oracle.com/javase/6/docs/api/javax/swing/JFileChooser.html#showDialog%28java.awt.Component,%20java.lang.String%29
Pass in "Save" for the approveButtonText argument.
As simple as this:
JFileChooser fc = new JFileChooser();
while(true)
{
if(fc.showSaveDialog(null) == JFileChooser.APPROVE_OPTION &&
!fc.getSelectedFile().exists())
JOptionPane.showMessageDialog(null, "You must select an existing file!");
else break;
}
I am using Netbeans for java application. during my application at one point i want particular folder URL to store files. how can i achieve this. please can anyone help me..
Thanks in advance :)
Use a JFileChooser, with JFileChooser.DIRECTORIES_ONLY Take a look at this tutorial: How to Use File Choosers
JFileChooser chooser = new JFileChooser();
chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
You want to select a folder in a swing application, right? you can use JFileChooser http://download.oracle.com/javase/tutorial/uiswing/components/filechooser.html
to select only a folder, look at this example
http://www.rgagnon.com/javadetails/java-0370.html
for the saving, check
http://download.oracle.com/javase/tutorial/essential/io/file.html
if you need something clarified, just ask.
I guess you want a Open File Dialog box.
In Swing it is called JFileChooser.
Usage example:
JFileChooser fc = new JFileChooser();
int returnVal = fc.showOpenDialog(yourJFrame);
if (returnVal == JFileChooser.APPROVE_OPTION) {
File file = fc.getSelectedFile();
// Do stuff with file
} else {
// User clicked cancel
}
yourJFrame should be the JFrame you use for your main window. If you don't have one put null.
I'm not sure if this is even possible as I can't find anything about it after quite a few Google searches.
What I would like to do is on event open up a file dialog box and allow the user to select a folder and then store that folders full directory in a string. So if a user selected a folder in C:\Windows\Example the directory would be stored in String fileDir = C:\Windows\Example;
Does this make sense? I hope so as I'm struggeling to find the answer. I do apperciate the help, thanks in advance for looking and more thanks if you help me :)
In swing you'll want a JFileChooser.
public String promptForFolder( Component parent )
{
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode( JFileChooser.DIRECTORIES_ONLY );
if( fc.showOpenDialog( parent ) == JFileChooser.APPROVE_OPTION )
{
return fc.getSelectedFile().getAbsolutePath();
}
return null;
}
It can be a little awkward selecting folders from a user's perspective. I've watched a lot of folks struggle with it. If you have the time you may want to try my DirectoryChooser. Sorry the code is so crufty; I wrote it awhile back.
You are looking for a FileChooser.
File choosers provide a GUI for navigating the file system, and then either choosing a file or directory from a list, or entering the name of a file or directory. To display a file chooser, you usually use the JFileChooser API to show a modal dialog containing the file chooser.