Show files name in JFrame
Hi, and happy new year.
I have this problem with my java learning.
I want to create a GUI application which will read files on a directory and display they're names in the JFrame title and in a label in the frame.
There are 2 classes: Start and ReadDirectory as below;
HTML Code:
//class Start
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.File;
public class Start extends JFrame implements ActionListener {
private JPanel north, centre;
private JLabel label, label1;
private JTextField box;
private String f;
private JButton go;
private File folder;
private File[] listOfFiles;
public static void main( String[] args){
JFrame frame = new Start();
frame.setTitle("Start_JAVA");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(350,120);
frame.setVisible(true);
} //end main
public Start(){
centre = new JPanel();
label1 = new JLabel("Enter folder's name ");
box = new JTextField("",20);
go = new JButton("Go");
centre.add(label1); centre.add(box);centre.add(go);
go.addActionListener(this); // listen for button click
add(centre, BorderLayout.CENTER);
}//end constructor
public void actionPerformed(ActionEvent ev) {
String entry = box.getText();
folder = new File("C:\\Users\\Alti\\Desktop\\Altin\\be" + entry);
listOfFiles = folder.listFiles();
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles[i].isFile()) {
f = listOfFiles[i].toString();
new ReadDirectory(f);
}//end if
}//end for
}//end actionPerformed
}//END_______________________________________
and the
HTML Code:
//class ReadDirectory
import java.awt.*;
import javax.swing.*;
public class ReadDirectory extends JPanel{
public ReadDirectory(String str) {
JFrame frame = new JFrame(Start.f);
frame.setSize(320, 170);
Container contentPane = frame.getContentPane();
contentPane.add(new ReadDirectory ());
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public ReadDirectory() {}
public void paint(Graphics g) {
super.paint(g);
g.setFont(new Font("Serif", Font.BOLD, 14));
g.drawString(Start.f,32,25);
}
}
My problem... I can see the file's name in the Frame's title, but the label is showing the last file's name???
No idea where the problem is. Any help will be appreciated.
Thank you.
Re: Show files name in JFrame
Hi,
The code you entered makes 2 frames. This isn't working yet.
I have picked some code from the internet. You should be able to print directories in the console by using the link and the following code: (you should alter the code a bit to get a function that returns files).
Listing the Files or Subdirectories in a Directory | Example Depot
Code :
public void actionPerformed(ActionEvent ev) {
if(ev.getSource()==go){
File[] subDirs = getSubDirectories("C:\\" + box.getText());
for(int i = 0; i < subDirs.length; i++)
System.out.println(subDirs[i].toString());
} else {
System.out.println("weird action performed.");
}
}//end actionPerformed
I dont think making a new JFrame and the labels is a problem for you.
Re: Show files name in JFrame
Hi
Looked again it just works like this:
Code :
package filenameresource2;
//class ReadDirectory
import java.awt.*;
import javax.swing.*;
public class ReadDirectory extends JPanel{
public ReadDirectory(String str) {
m_string = str;
JFrame frame = new JFrame(str);
frame.setSize(320, 170);
Container contentPane = frame.getContentPane();
contentPane.add(new ReadDirectory ());
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public ReadDirectory() {}
public void paint(Graphics g) {
super.paint(g);
g.setFont(new Font("Serif", Font.BOLD, 14));
g.drawString(m_string,32,25);
}
String m_string;
}
Re: Show files name in JFrame
Spoonfeeding is not helping.
OP- One of your basic problems is that you're passing the String to display into each ReadDirectory, but then you're drawing the String from your Start class, which for some reason is updated each time you read a file name.
You are also creating multiple JFrames for some reason, and you never add the ReadDirectory to your main JFrame.
Re: Show files name in JFrame
It counts the directories in the listofFiles also. not only the files
check the output lke this:
System.out.println(listOfFiles[i].toString());
Re: Show files name in JFrame
Looks like I forgotten to change the String f on the Start class; instead of private String f; is static String f;.
Also I WANT to create multiple JFrames...maybe haven't explain clearly what I want...
The problem is that every frame have the file's title, but label is overited and is showing only the last file as in:
HTML Code:
Frame Frame_Title Frame_Label
1 a.txt c.txt
2 b.txt c.txt
3 c.txt c.txt
I want it to be:
Frame Frame_Title Frame_Label
1 a.txt a.txt
2 b.txt b.txt
3 c.txt c.txt
Re: Show files name in JFrame
Again- You're painting Start.f, which you update each time you iterate, which means it will end up being the last value iterated over.
You want to use the String you pass in to ReadDirectory's constructor.
Re: Show files name in JFrame
Thanks for pointing to the right direction.
Actually I now got an:
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: String is null
at ReadDirectory.paint(ReadDirectory.java:22)
The paint() is really hunting me.
Never understood when is called....
Re: Show files name in JFrame
Hi again,
I have looked at the code.
The paint method is called:
Quote:
System-triggered Painting
In a system-triggered painting operation, the system requests a component to render its contents, usually for one of the following reasons:
* The component is first made visible on the screen.
* The component is resized.
* The component has damage that needs to be repaired. (For example, something that previously obscured the component has moved, and a previously obscured portion of the component has become exposed).
In your program the m_string has not been initialized when you call your constructor ReadDirectory() { from ReadDirectory(String) .
Look at this code very carefully :D
Re: Show files name in JFrame
Or in your code Start.f gets called when the JPanel is painted. But is not initialized because of ReadDirectory().
Re: Show files name in JFrame
Why do you create an empty ReadDirectory in the ReadDirectory(String) constructor? You should be painting that supplied String.
Re: Show files name in JFrame
Why do you create an empty ReadDirectory in the ReadDirectory(String) constructor? You should be painting that supplied String.
I have this "idea" that paint() is been called from constructor with no parameters. :o
From your question can see that is totally not needed.
Re: Show files name in JFrame
Quote:
Originally Posted by
altisw5
Why do you create an empty ReadDirectory in the ReadDirectory(String) constructor? You should be painting that supplied String.
I have this "idea" that paint() is been called from constructor with no parameters. :o
From your question can see that is totally not needed.
Indeed. I'd be curious to see what your code looks like after taking that into consideration. Feel free to post an SSCCE (thats a link).
Re: Show files name in JFrame
Thanks guys.
I got it right at the end.
My ReadDirectory Class
Code :
import java.awt.*;
import javax.swing.*;
public class ReadDirectory extends JPanel{
String s;
public ReadDirectory(String str) {
s = str;
JFrame frame = new JFrame(Start.f);
frame.setSize(320, 170);
Container contentPane = frame.getContentPane();
contentPane.add(this);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void paint(Graphics g) {
super.paint(g);
g.drawString(s,32,25);
}
}
Really appreciate your help. :-bd
Re: Show files name in JFrame
Hi guys :)
My skill English is not good
But I understand main content of this thread is "Show files name in JFrame" as IIS GUI.
Example :
http://i581.photobucket.com/albums/s...y_JTabList.png
I want a complete source about this feature
Who can help me... ?
I hope good everything to you
Thanks you very much !!!
I found a following code :D :
Code :
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package myjws;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import javax.swing.JFrame;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
/**
*
* @author ndp1007
*/
public class DirectoryManament {
public static File root = new File(".");
public static void main(String[] argv){
JTree tree = new JTree(new FileTreeModel(root));
MouseAdapter ma = new MouseAdapter() {
private void myPopupEvent(MouseEvent e) {
int x = e.getX();
int y = e.getY();
JTree tree = (JTree)e.getSource();
TreePath path = tree.getPathForLocation(x, y);
if (path == null)
return;
tree.setSelectionPath(path);
Object obj = (Object)path.getLastPathComponent();
JPopupMenu popup = new JPopupMenu();
JMenuItem deleteItem = new JMenuItem("Deleted Virtual Directory");
JMenuItem addItem = new JMenuItem("Add Virtual Directory");
popup.add(addItem);
popup.addSeparator();
popup.add(deleteItem);
/*popup.add(new JMenuItem(label)).addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
//throw new UnsupportedOperationException("Not supported yet.");
System.out.print("hrhrhr");
}
});*/
deleteItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//System.out.print(DirectoryManament.toString());
//e.get
JOptionPane.showMessageDialog(null,
"Deleted Virtual Directory");
}
});
addItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JOptionPane.showMessageDialog(null,
"Open Frame To Make VD");
}
});
popup.show(tree, x, y);
}
public void mousePressed(MouseEvent e) {
if (e.isPopupTrigger()) myPopupEvent(e);
}
public void mouseReleased(MouseEvent e) {
if (e.isPopupTrigger()) myPopupEvent(e);
}
};
tree.addMouseListener(ma);
JScrollPane scrollpane = new JScrollPane(tree);
JFrame frame = new JFrame("Derectory Manament");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(scrollpane, "Center");
frame.setSize(400, 600);
frame.setVisible(true);
}
}
class FileTreeModel implements TreeModel {
// Chi ra thu muc root cua webserver
protected File root;
public FileTreeModel(File root)
{
this.root = root;
}
// The model knows how to return the root object of the tree
public Object getRoot()
{
return root;
}
// Tell JTree whether an object in the tree is a leaf or not
public boolean isLeaf(Object node) {
return ((File) node).isFile();
}
// Tell JTree how many children a node has
public int getChildCount(Object parent) {
String[] children = ((File) parent).list();
if (children == null) return 0;
return children.length;
}
// Fetch any numbered child of a node for the JTree.
// Our model returns File objects for all nodes in the tree.* The
// JTree displays these by calling the File.toString() method.
public Object getChild(Object parent, int index) {
String[] children = ((File) parent).list();
if ((children == null) || (index >= children.length))
return null;
return new File((File) parent, children[index]);
}
// Figure out a child's position in its parent node.
public int getIndexOfChild(Object parent, Object child) {
String[] children = ((File) parent).list();
String childname = ((File) child).getName();
if (children == null) return -1;
for (int i = 0; i < children.length; i++) {
if(childname.equals(children[i])) return i;
}
return -1;
}
// This method is only invoked by the JTree for editable trees.
public void valueForPathChanged(TreePath path, Object newvalue) {}
// Since this is not an editable tree model, we never fire any events,
public void addTreeModelListener(TreeModelListener l) {}
public void removeTreeModelListener(TreeModelListener l) {}
}
Re: Show files name in JFrame
Quote:
Originally Posted by
ndp1007
I want a complete source about this feature
That is absolutely not how this works. If you want somebody to create the code for you, check out the Paid Java Projects forum from the main page. Otherwise, see the link in my signature before you post again.
