How can I create JScrollPane in my swing application with scroll bars movin

Hi,
How can we create scrollpanes moving with scrollbars.I tried many times with custom layout.but it does not work if i set custom layout.I hope that I will get my problem solved.
Thanks and Regards,
Rameh RK

This means it is not possible to create a pure unicode file without the byte order mark?
You wouldn't happen to know how a file with byte order mark should read on a Linux system?
Or if this possible or not?
Regards
Christian

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Divide JscrollPane into 2 picure viewer with scroll bar

Hello to all, help me, i must divide a JScrollPane into 2 sub-windows in witch putting 2 different images.
The image that i put at left is loaded by a JFileChooser.
This is the code, my problem is into load_file() function.
Help me, thanks a lot.
Escuse me for my bad english.
package Crypto;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;
import javax.imageio.*;
import javax.swing.*;
import javax.swing.event.*;
import java.io.File.*;
import javax.swing.filechooser.FileFilter;
import java.io.*;
public class Crypto extends JFrame implements ActionListener {
private BufferedImage sorgente = null;
private BufferedImage shares = null;
private BufferedImage somma = null;
private JMenuBar mb;
private JMenu menu1;
private JMenu menu2;
private JMenu menu3;
private JButton go;
private JButton set_n;
private JButton set_k;
private JButton op;
private JButton schemi;
private JMenuItem item_01;
private JMenuItem item_02;
private JMenuItem item_03;
private JMenu item_04;
private JMenuItem item_04_a;
private JMenuItem item_04_b;
private JMenuItem item_05;
private JMenuItem item_06;
private JMenuItem item_07;
private JMenuItem item_08;
private BorderLayout layout = new BorderLayout();
private JToolBar tb = new JToolBar();
private int k = 2;
private int n = 4;
private String formato = "PNG";
private File original;
private File sovra_imp;
private Schema curr;
private ImageIcon ii = new ImageIcon();
private JScrollPane JSPanel;
private ScrollablePicture picture;
public Crypto() {
this.getContentPane().setLayout(layout);
this.getContentPane().add(BorderLayout.NORTH,tb);
JSPanel = new JScrollPane();
//JSPanel.setSize(150, 250);
this.getContentPane().add(BorderLayout.WEST, JSPanel);
mb = new JMenuBar();
mb.setAutoscrolls(true);
setJMenuBar(mb);
menu1= new JMenu("File");
mb.add(menu1);
item_01 = new JMenuItem("Apri file ...");
menu1.add(item_01);
item_02 = new JMenuItem("Quit ...");
menu1.add(item_02);
menu2= new JMenu("Impostazioni");
mb.add(menu2);
item_03 = new JMenuItem("Formato salvataggio shares");
menu2.add(item_03);
item_05 = new JMenuItem("Modifica numero partecipanti");
menu2.add(item_05);
item_06 = new JMenuItem("Imposta grado di visibilit�");
menu2.add(item_06);
item_04 = new JMenu("Schemi");
item_04_a = new JMenuItem ("Schema corrente");
item_04.add (item_04_a);
item_04_b = new JMenuItem("Modifica schema corrente");
item_04.add (item_04_b);
menu2.add(item_04);
menu3= new JMenu("Help");
mb.add(menu3);
item_07 = new JMenuItem("Guida");
menu3.add(item_07);
item_08 = new JMenuItem("About");
menu3.add(item_08);
op = new JButton ("Apri file ");
op.addActionListener(this);
tb.add(op);
go = new JButton("Crea shares");
go.addActionListener(this);
tb.add(go);
set_k = new JButton("Modifica visibilit� shares");
set_k.addActionListener(this);
tb.add(set_k);
set_n = new JButton("Modifica n. partecipanti");
set_n.addActionListener(this);
tb.add(set_n);
schemi = new JButton("Modifica schema corrente");
schemi.addActionListener(this);
tb.add(schemi);
item_01.addActionListener(this);
item_02.addActionListener(this);
item_03.addActionListener(this);
item_04_a.addActionListener(this);
item_04_b.addActionListener(this);
item_05.addActionListener(this);
item_06.addActionListener(this);
item_07.addActionListener(this);
item_08.addActionListener(this);
curr = Schema.carica_schema ("2-2-b-w");
this.setBounds(150, 150, 800, 500);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setTitle("Crypto magic");
this.setVisible(true);
public void actionPerformed(java.awt.event.ActionEvent ae) {
Object source = ae.getSource();
Class sourceClass = source.getClass();
if (sourceClass.getName().equals("javax.swing.JMenuItem")){
JMenuItem ch = (JMenuItem) source;
if (ch == item_01){
load_file();
}else if (ch == item_02){
close_frame();
}else if (ch ==item_03){
scegli_formato();
}else if (ch == item_04_a){
schema_corrente();
}else if (ch == item_04_b){
cambia_schema();
}else if (ch == item_05){
set_n();
}else if (ch == item_06){
set_k();
}else if (ch == item_07){
guida();
}else about();
if (sourceClass.getName().equals("javax.swing.JButton")){
JButton jb = (JButton) source;
if (jb == go){
crea_shares();
}else if (jb == set_n){
set_n();
}else if (jb == op){
load_file();
}else if (jb == set_k){
set_k();
public void load_file() {
JFileChooser fc = new JFileChooser();
fc.setAcceptAllFileFilterUsed(false);
fc.setFileFilter(new ImageFilter());
int retval = fc.showOpenDialog(this);
try{
if (retval == JFileChooser.APPROVE_OPTION){
original = fc.getSelectedFile();
//String nome = original.getName();
sorgente = ImageIO.read (original);
ii.setImage(sorgente);
picture = new ScrollablePicture(ii, 1);
JSPanel = new JScrollPane(picture, JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
this.getContentPane().add(BorderLayout.WEST, JSPanel);
this.repaint();
}catch (Exception e){}
void close_frame(){
System.exit(0);
void scegli_formato(){
Impostazioni i = new Impostazioni(0);
void set_n(){
Impostazioni i = new Impostazioni(2);
void set_k (){
Impostazioni i = new Impostazioni(1);
Schema schema_corrente(){
return curr;
void cambia_schema(){}
void guida(){
void about(){
void crea_shares(){
public class Impostazioni extends JFrame implements ChangeListener{
JTabbedPane panel = new JTabbedPane();
Impostazioni(int i){
FSS c1 = new FSS();
SET_K c2 = new SET_K();
SET_N c3 = new SET_N();
panel.add("Formato shares", c1);
panel.add("Modifica K", c2);
panel.add("Modifica N", c3);
panel.addChangeListener(this);
if ( i == 0){
panel.setSelectedComponent(c1);
}else if ( i == 1){
panel.setSelectedComponent(c2);
}else if (i == 2){
panel.setSelectedComponent(c3);
getContentPane().add(panel);
this.setResizable(false);
this.setBounds(200, 200, 500, 300);
this.setTitle("Impostazioni");
this.setVisible(true);
public void stateChanged(ChangeEvent e) {
int pos = panel.getSelectedIndex();
String title = panel.getTitleAt(pos);
setTitle(title);
public class FSS extends JPanel implements ActionListener{
private JComboBox cb;
private JLabel et;
JLabel ico;
Icon i1 = new ImageIcon("C:/forte/sampledir/Crypto/JPGIcon.jpg");
Icon i2 = new ImageIcon("C:/forte/sampledir/Crypto/PNGIcon.jpg");
FSS(){
this.setLayout(new FlowLayout(FlowLayout.CENTER, 20, 30));
int i;
String item []= {"JPG", "PNG"};
for (i = 0; i < 1; i++)
if (item == formato) break;
String msg = "\n\n\n\n\nIl formato attualmente in uso � "+formato+"\n\n";
et = new JLabel(msg);
add(et);
JLabel et2 = new JLabel ("Modidica il formato di salvataggio delle shares ");
if (formato =="JPG"){
ico = new JLabel(i1);
}else {ico = new JLabel(i2);}
add (ico);
add (et2);
cb = new JComboBox(item);
cb.setSelectedIndex(i);
cb.addActionListener(this);
add(cb);
public void actionPerformed(java.awt.event.ActionEvent ae) {
JComboBox cb = (JComboBox)ae.getSource();
String selectedItem = (String)cb.getSelectedItem();
int ind = cb.getSelectedIndex();
formato = selectedItem;
et.setText("Il formato attualmente in uso � "+selectedItem);
if (formato == "PNG"){
ico.setIcon(i2);
}else{
ico.setIcon(i1);
public class SET_K extends JPanel implements ActionListener{
private JLabel et3;
SET_K(){
this.setLayout(new FlowLayout(FlowLayout.CENTER, 40, 40));
String msg = "Il valore attuale di k � "+k+"\n\n";
et3 = new JLabel(msg);
et3.setFont(new Font("Tim", Font.BOLD, 16 ));
add (et3);
JButton but2 = new JButton ("Modifica K");
add (but2);
but2.addActionListener(this);
public void actionPerformed(java.awt.event.ActionEvent ae) {
Object source = ae.getSource();
int value;
Class sourceClass = source.getClass();
if (sourceClass.getName().equals("javax.swing.JButton")){
Kappa kappa= new Kappa();
value = kappa.get_K();
if ((value > n) ||(value < 2)){
JOptionPane err = new JOptionPane();
String err_msg ="Errore, il valore di K deve essere un intero compreso tra 2 e " +n;
err.showMessageDialog(null,err_msg , "Errore", JOptionPane.ERROR_MESSAGE);
this.setVisible(false);
}else{
k = value;
JOptionPane ok_ = new JOptionPane();
ok_.showMessageDialog(null, "Modifica effettuata con successo. ");
et3.setText("Il valore attuale di K � " +value);
this.setVisible(false);
public class SET_N extends JPanel implements ActionListener{
private JLabel et4;
SET_N(){
this.setLayout(new FlowLayout(FlowLayout.CENTER, 40, 40));
String msg = "Il valore attuale di n � "+n+"\n\n";
et4 = new JLabel(msg);
et4.setFont(new Font("Tim", Font.BOLD, 16 ));
add (et4);
JButton but3 = new JButton ("Modifica N");
add (but3);
but3.addActionListener(this);
public void actionPerformed(java.awt.event.ActionEvent ae) {
Object source = ae.getSource();
int value;
Class sourceClass = source.getClass();
if (sourceClass.getName().equals("javax.swing.JButton")){
Kappa kappa= new Kappa();
value = kappa.get_K();
if (value < k){
JOptionPane err = new JOptionPane();
String err_msg ="Errore, il valore di N deve essere un intero superiore o uguale a " +k;
err.showMessageDialog(null,err_msg , "Errore", JOptionPane.ERROR_MESSAGE);
this.setVisible(false);
}else{
n = value;
JOptionPane ok_ = new JOptionPane();
ok_.showMessageDialog(null, "Modifica effettuata con successo. ");
et4.setText("Il valore attuale di N � " +value);
this.setVisible(false);
public int salva_schema(Schema s){
String nome = s.get_name();
nome = nome + ".ctm";
try{
FileOutputStream fos = new FileOutputStream (nome);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(s);
oos.close();
return 1;
catch (Exception ioe){
return -1;
public Schema leggi_schema (String nome){
try{
nome = nome + ".ctm";
FileInputStream fis = new FileInputStream (nome);
ObjectInputStream ois = new ObjectInputStream(fis);
Schema salvato = (Schema)(ois.readObject());
ois.close();
return salvato;
catch (Exception ioe){
return null;
public static void main(String args[]){
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) { }
JFrame f = new Crypto();
f.setVisible(true);
package Crypto;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
/* ScrollablePicture.java is used by ScrollDemo.java. */
public class ScrollablePicture extends JLabel
implements Scrollable,
MouseMotionListener {
private int maxUnitIncrement = 1;
private boolean missingPicture = false;
public ScrollablePicture(ImageIcon i, int m) {
super(i);
if (i == null) {
missingPicture = true;
setText("No picture found.");
setHorizontalAlignment(CENTER);
setOpaque(true);
setBackground(Color.white);
maxUnitIncrement = m;
//Let the user scroll by dragging to outside the window.
setAutoscrolls(true); //enable synthetic drag events
addMouseMotionListener(this); //handle mouse drags
//Methods required by the MouseMotionListener interface:
public void mouseMoved(MouseEvent e) { }
public void mouseDragged(MouseEvent e) {
//The user is dragging us, so scroll!
Rectangle r = new Rectangle(e.getX(), e.getY(), 1, 1);
scrollRectToVisible(r);
public Dimension getPreferredSize() {
if (missingPicture) {
return new Dimension(320, 480);
} else {
return super.getPreferredSize();
public Dimension getPreferredScrollableViewportSize() {
return getPreferredSize();
public int getScrollableUnitIncrement(Rectangle visibleRect,
int orientation,
int direction) {
//Get the current position.
int currentPosition = 0;
if (orientation == SwingConstants.HORIZONTAL) {
currentPosition = visibleRect.x;
} else {
currentPosition = visibleRect.y;
//Return the number of pixels between currentPosition
//and the nearest tick mark in the indicated direction.
if (direction < 0) {
int newPosition = currentPosition -
(currentPosition / maxUnitIncrement)
* maxUnitIncrement;
return (newPosition == 0) ? maxUnitIncrement : newPosition;
} else {
return ((currentPosition / maxUnitIncrement) + 1)
* maxUnitIncrement
- currentPosition;
public int getScrollableBlockIncrement(Rectangle visibleRect,
int orientation,
int direction) {
if (orientation == SwingConstants.HORIZONTAL) {
return visibleRect.width - maxUnitIncrement;
} else {
return visibleRect.height - maxUnitIncrement;
public boolean getScrollableTracksViewportWidth() {
return false;
public boolean getScrollableTracksViewportHeight() {
return false;
public void setMaxUnitIncrement(int pixels) {
maxUnitIncrement = pixels;

Instead of "new ImageFilter()", use this file filter:
public static javax.swing.filechooser.FileFilter SOLOMENTE_JPG_GIF_PNG=
new javax.swing.filechooser.FileFilter(){
public String getDescription(){
return "jpg, gif, o png";
public boolean accept(java.io.File file){
String n= file.getName();
return n.endsWith(".jpg") || n.endsWith(".gif") || n.endsWith(".png");
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JFileChooser fc = new JFileChooser();
fc.setAcceptAllFileFilterUsed(false);
fc.setFileFilter(SOLOMENTE_JPG_GIF_PNG); // <-- NUEVO
int retval = fc.showOpenDialog(this);
try{
if (retval == JFileChooser.APPROVE_OPTION){
original = fc.getSelectedFile();
//String nome = original.getName();
sorgente = ImageIO.read(original);
ii.setImage(sorgente);
picture = new ScrollablePicture(ii, 1);
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this.repaint();
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How can i create and access resource file(with .res ext) in j2me

hi,
i am developing an mobile international application using jsr-238 an optional api to implement the idea of internationalizationand localization.
please tell me how can i create .res files in my application to store strings of different languages.thanks inadvance.

Hello GG RA,
which fileformat do you want to use (binary or ASCII)?
There are some LabVIEW shipping examples for File I/O
You could use the LabVIEW NI Example Finder (Help --> Find Examples..(search item "file")) to get an overview about the different file-formats in LabVIEW.
Hope this helped out and feel free to reply if you have more questions about File I/O in LabVIEW
Best regards
Benjamin

How can I create an iPhoto Library from photos on an external drive?

Here's my issue:
I have a MacBook Pro running OS X Mavericks, and I am just about out of hard drive space.
I also have about 20 GB worth of photos on an external drive. The photos are not organized at all, just got dumped into a folder there during a hasty backup a couple years ago.
I'd like to use iPhoto to get these photos organized, but don't have the space to import them into the library on my laptop.
How can I create and manage an iPhoto library with these photos while keeping them on the external drive? They are on a terabyte drive, so I have a feeling I'd like to make that my main library moving forward.

Check that the drive's formatted as Mac OS Extended, drag the iPhoto library to it, launch iPhoto with the Option key held down, and choose that library.
(114618)

How can you create a spry menu bar with no background colour?

How can you create the first level of a spry menu bar to have no colour? I have a coloured background right now and the colour matches when you load the site in Internet explorer but does not match in Firefox. Any suggestions are welcomed on how to fix this.
Thanks!
HK

Here is the site:
http://partnersnaturally.ca/
I am learning with code, (obviously) so any feedback would be nice. I use dreamweaver CS4, but when I originally designed the site it was in a much older version of dreamweaver. I wonder if that could also be a cause. (besides human error)
Thanks again,
HK

How can you create a playlist with music and music video and play those from same playlist through Apple TV?

How can you create a playlist on Ipod touch with music and music video, and play those from same playlist through Apple TV? I can download, create a playlist with both music and music video, stream that through the Apple TV with no problem. The sound and the information show up on the TV, but when it gets to a music video, it only shows the information and "artwork".
I also have a video playlist - videos play fine through the Apple TV, but will not shuffle through all videos - continues to repeat the same one. I have most definitely selected shuffle in both locations - from the playlist and on the ipod video screen while video is playing.

I finally got it... had to sync the photos with the music in iMovie, arrange the voiceover in GarageBand then export to iTunes, and then I was able to put it all together in iMovie and burn in iDVD... had a few glitches along the way but finally finished : )
Message was edited by: jpewald

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