We Keep Coding

Getting the cost of an enum through a JList

so I have 4 JLists to contain 4 different parts of a skateboard, the trucks, the wheels, miscellaneous, and decks.
I have four enums set up in my class SkateBoardParts, as such:
public class SkateBoardParts {
public enum Decks {
FIRST_DECK(10),
....
}
double cost;
private Decks(double c){
cost = c;
}
... getCost blah
}
In my GUI, I have a button to calculate. I have an action listener on that button. My goal is to get the cost of all the selected values in the JLists and add them together to get a total. I have the JLists set up as fields. How do I do this? Would I get the index and then use that index to select the value in the enum? Something like this? (I get an error on truckIndex)
double total = 0;
int truckIndex = trucksList.getSelectedIndex();
total += SkateBoardParts.Trucks.truckIndex.getCost();
if you want my entire code for my GUI thus far:
https://pastebin.com/CiSsV8qR
my enum:
https://pastebin.com/WqXs05aK

A simple solution is to store the value of each component at the point at which the user selects the part:
private double partCost = 0.0;
...
JList<SkateBoardPart> list = new JList(SkateBoardPart.values());
list.addListSelectionListener(ev -> partCost = list.getSelectedValue().getCost());
That will keep the cost up to date each time the user selects a part.

Define your JList as follows
private final JList<SkateBoardParts> trucksList = new JList(trucksArray);
In your action listener do the following
JList<SkateBoardParts> list = (JList<SkateBoardParts>) e.getSource();
SkateBoardParts obj = (SkateBoardParts) list.getSelectedValue();
obj.getCost();
Update
Here is an example of SSCCE. Please try to post something similar for better help sooner.
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.SwingUtilities;
public class JListExample extends JFrame {
private final JList<Trucks> trucksList;
public JListExample() {
//create the model and add elements
DefaultListModel<Trucks> listModel = new DefaultListModel<>();
for (Trucks truk: Trucks.values()) {
listModel.addElement(truk);
}
//create the list
trucksList = new JList<>(listModel);
trucksList.addMouseListener(new MouseAdapter() {
#Override
public void mouseClicked(MouseEvent me) {
JList<Trucks> list = (JList<Trucks>) me.getSource();
Trucks truck = (Trucks) list.getSelectedValue();
System.out.println("Cost " + truck.getCost());
}
});
add(trucksList);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setTitle("JList Example");
this.setSize(200, 200);
this.setLocationRelativeTo(null);
this.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
new JListExample();
}
});
}
}
enum Trucks {
SEVEN_INCH_AXLE(35),
EIGHT_INCH_AXLE(40),
EIGHT_AND_HALF_INCH_AXLE(45);
double cost;
private Trucks(double c) {
cost = c;
}
public double getCost() {
return cost;
}
}

Java swing component to show image grid

Its been a while since i built a desktop JAVA application.. after lots of documentation and doing implementation tests, i still have not found an image grid solution.
Either Java lacks such a ready-to-use component (?!) or you tell me to brush up my google-fu. :)
I have a very simple technical premises: a JDialog that allows the user to pick an image. Input is a Map<Integer, String> list that holds filenames. Output is the Integer key the user chose. GUI also is simple: user chooses 1 image using mouse or keyboard, and dialog closes. All images are 80x80px and loaded from filename, not a resource.
I tried several approaches so far this morning:
Search for components/widgets that show scrollable imagegrid that can flow to the left. (no dice)
Search for components/widgets that show scrollable imagegrid (no dice)
Search for any components/widgets/gui-libs (no dice .. do these even exist?!)
Try and implement myJList.setModel(), but i cant get it to just take my Map<> and show thumbnails. (overcomplicates!)
Try and implement myJPanel.setlayout(new FlowLayout(..)) with several myJPanel.add(new JButton(..)) which just creates a bunch of JButton on a JPanel, which each need a event handler. I wonder how scrolling and keyboard input is going to work out, and how i'm supposed to keep/reference my Map<> key values. (overcomplicates?)
In lieu of your answer, i am now working on the latter, which should work but i cant believe everyone needs to reinvent the same GUI wheel here. How to have the user select an image from my Map<Integer, String>? Are there JAVA libraries/widgets/components that i should look to avoid this?
I hope this isn't being modded down, i have no working implementation with error to show you guys.. this question is about how/where to find the components or what approaches would be better. Its 2014 and i cant believe that JAVA still requires me to build my own "GUI component" just to see some images.. not even Delphi or Mono does that.

If all you want is a grid of images, and having them selectable, consider using a JList, filling it with appropriate ImageIcons, and giving it a ListSelectionListener. In the Listener you can close the enclosing dialog when a selection has been made.
You state:
Try and implement myJList.setModel(), but i cant get it to just take my Map<> and show thumbnails. (overcomplicates!)
You need to use your Map to populate your ListModel, and set that Model to the JList's model.
For example:
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dialog.ModalityType;
import java.awt.Window;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
#SuppressWarnings("serial")
public class ImageGridPanel extends JPanel {
public static final String PATH = "http://images-2.drive.com.au/2011/";
public static final String[] CARS = {
"04/15/2308961/giulietta_1024-80x80.jpg",
"11/18/2781958/audi-a1-sportback_600-80x80.jpg",
"12/23/2856762/fiat-500-80x80.jpg",
"01/12/2129944/Honda-Civic-Sedan-concept-1_600-80x80.jpg",
"12/23/2856581/mini-roadster-80x80.jpg",
"12/23/2856571/hyundai-veloster-80x80.jpg",
"12/23/2856771/hyundai-i30-80x80.jpg",
"12/23/2856580/mini-coupe-80x80.jpg" };
private DefaultListModel<Car> carModel = new DefaultListModel<>();
final JTextField textField = new JTextField(20);
public ImageGridPanel() {
for (String carPath : CARS) {
String path = PATH + carPath;
try {
URL imgUrl = new URL(path);
BufferedImage img = ImageIO.read(imgUrl);
ImageIcon icon = new ImageIcon(img);
String name = carPath.substring(carPath.lastIndexOf("/"));
name = name.substring(1, name.lastIndexOf("-"));
carModel.addElement(new Car(name, icon));
} catch (IOException e) {
e.printStackTrace();
System.exit(-1);
}
}
ShowGridAction showAction = new ShowGridAction("Car Grid", carModel);
JButton showGridBtn = new JButton(showAction);
add(showGridBtn);
add(textField);
}
private class ShowGridAction extends AbstractAction {
private CarGridPanel carGridPanel;
public ShowGridAction(String name, DefaultListModel<Car> carModel) {
super(name);
carGridPanel = new CarGridPanel(carModel);
}
public CarGridPanel getCarGridPanel() {
return carGridPanel;
}
#Override
public void actionPerformed(ActionEvent e) {
Window win = SwingUtilities.getWindowAncestor((Component) e.getSource());
JDialog dialog = new JDialog(win, "Cars", ModalityType.APPLICATION_MODAL);
dialog.add(carGridPanel);
dialog.pack();
dialog.setLocationRelativeTo(null);
int x = dialog.getLocation().x;
int y = dialog.getLocation().y - 150;
dialog.setLocation(x, y);
dialog.setVisible(true);
Car selectedCar = carGridPanel.getSelectedCar();
if (selectedCar != null) {
textField.setText(selectedCar.getName());
}
}
}
private static void createAndShowGui() {
JFrame frame = new JFrame("ImageGrid");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(new ImageGridPanel());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
class Car {
String name;
Icon icon;
public Car(String name, Icon icon) {
this.name = name;
this.icon = icon;
}
public String getName() {
return name;
}
public Icon getIcon() {
return icon;
}
}
#SuppressWarnings("serial")
class CarGridPanel extends JPanel {
private JList<Car> carList = new JList<>();
private Car selectedCar;
public CarGridPanel(ListModel<Car> model) {
carList.setModel(model);
carList.setLayoutOrientation(JList.HORIZONTAL_WRAP);
carList.setVisibleRowCount(2);
carList.setCellRenderer(new DefaultListCellRenderer() {
#Override
public Component getListCellRendererComponent(JList<?> list,
Object value, int index, boolean isSelected, boolean cellHasFocus) {
if (value != null) {
Car carValue = (Car) value;
value = carValue.getIcon();
} else {
value = "";
}
return super.getListCellRendererComponent(list, value, index,
isSelected, cellHasFocus);
}
});
setLayout(new BorderLayout());
add(new JScrollPane(carList));
carList.addListSelectionListener(new ListListener());
}
public Car getSelectedCar() {
return selectedCar;
}
private class ListListener implements ListSelectionListener {
#Override
public void valueChanged(ListSelectionEvent e) {
selectedCar = carList.getSelectedValue();
Window win = SwingUtilities.getWindowAncestor(CarGridPanel.this);
win.dispose();
}
}
}

No, Java doesn't have what you want.
Java is a general-purpose programming language, not a toolset, particularly not a specialized desktop GUI toolset. This is not a denigration of the language, just a statement of a purpose that it was not developed to fulfill.
If Delphi or Mono or anything has your particular widget, then I suggest you program in that, instead. This is not a denigration of you, just an observation that, if you do not want to put together the widget you want from lower-level components and code, then Java is not the right language/tool for you to use to do it.
As for not believing that Java "still requires" you to build your own component, I can only say that you don't get to choose which languages provide which features. I'm just as glad Java isn't littered with your component and the hundreds of others that people like you would come up with that they think Java should provide. It's big enough as it is.

Simple Java editor GUI

Hello i create the GUI code for simple Java editor
i create the menu but i need to match
File: New: Create a new file. asking for the name of the file (and therefore the public class) and the directory in which it will be stored. With the creation of the file is inserted into the structure of the public class, for example public class MyClass{ }.
Open: opens files with source code java ( .java).
Save : saves the current snippet on the same file with this established during the creation of.
Save as : displays the dialog box where you requested the name of the file, the format of the directory in which it will be stored. The format will be java file ( .java). The main part of the window will have the editor to be used by the user to edit a file source Java.
The main part of the window will have the editor to be used by the user to edit a file source Java. information which will be renewed during the processing of a snippet: Number lines Number reserved words in java source code
Formatting Text
Each file will open formatted and will formatted when processed in the following rules: The reserved words of java will appear with color blue.
The comments will appear in green
The String Literals with orange
All other with black
The Font will be Courier Font size 12pt
i will provide the GUI code can anyone help me with the above ?
Regards
Antonis
// ClassEEFrame
package editor.gui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTextPane;
import javax.swing.border.TitledBorder;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.text.BadLocationException;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
public class EEFrame extends JFrame {
/**
*
*/
private static final long serialVersionUID = -1709009137090877913L;
private GridBagLayout layout;
private GridBagConstraints constraints;
private EEMenuBar menuBar;
private EETextPane editor;
private EEConsole console;
private EEStatusBar statusBar;
private File file;
public EEFrame() throws HeadlessException {
super("Elearn Editor");
JScrollPane scrollPane;
layout = new GridBagLayout();
setLayout(layout);
constraints = new GridBagConstraints();
menuBar = new EEMenuBar();
setJMenuBar(menuBar);
editor = new EETextPane();
scrollPane = new JScrollPane(editor);
scrollPane.setBorder(new TitledBorder("Editor"));
setConstraints(1, 100, GridBagConstraints.BOTH);
addComponent(scrollPane, 0, 0, 1, 1);
console = new EEConsole();
scrollPane = new JScrollPane(console);
scrollPane.setBorder(new TitledBorder("Console"));
setConstraints(1, 40, GridBagConstraints.BOTH);
addComponent(scrollPane, 1 ,0 ,1, 1);
statusBar = new EEStatusBar();
setConstraints(1, 0, GridBagConstraints.BOTH);
addComponent(statusBar, 2, 0, 1, 1);
file = null;
}
public JTextPane getTextPane() {
return this.editor;
}
public void setLines(int lines) {
this.statusBar.setLines(lines);
}
public void setWords(int words) {
this.statusBar.setJavaWords(words);
}
private void setConstraints(int weightx, int weighty, int fill) {
constraints.weightx = weightx;
constraints.weighty = weighty;
constraints.fill = fill;
}
private void addComponent(Component component, int row, int column, int width, int height) {
constraints.gridx = column;
constraints.gridy = row;
constraints.gridwidth = width;
constraints.gridheight = height;
layout.setConstraints(component, constraints);
add(component);
}
private class EEMenuBar extends JMenuBar {
/**
*
*/
private static final long serialVersionUID = -2176624051362992835L;
private JMenu fileMenu, compilationMenu;
private JMenuItem newItem, openItem, saveItem, saveAsItem, exportItem, compileProcessItem, compileClassItem;
public EEMenuBar() {
super();
fileMenu = new JMenu("File");
newItem = new JMenuItem("New");
newItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
/* TODO Dispay dialog with inputs class name and file path */
}
});
fileMenu.add(newItem);
openItem = new JMenuItem("Open");
openItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
/*TODO Open existing java source file*/
}
});
fileMenu.add(openItem);
saveItem = new JMenuItem("Save");
saveItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
/*TODO save changes to file*/
}
});
fileMenu.add(saveItem);
saveAsItem = new JMenuItem("Save As");
saveAsItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
/*TODO Save as new java source file*/
}
});
fileMenu.add(saveAsItem);
exportItem = new JMenuItem("Export to pdf");
exportItem.addActionListener(new ActionListener(){
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO save as pdf(formatted)
}
});
fileMenu.add(exportItem);
add(fileMenu);
compilationMenu = new JMenu("Compilation");
compileProcessItem = new JMenuItem("Compile with system jdk");
compileProcessItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
/*TODO Compile java source code and show results in teminal(inside editor)*/
}
});
compilationMenu.add(compileProcessItem);
compileClassItem = new JMenuItem("Compile with JavaCompiler Class");
compileClassItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
/*TODO Call system compiler for file*/
}
});
compilationMenu.add(compileClassItem);
add(compilationMenu);
}
}
private class EETextPane extends JTextPane {
/**
*
*/
private static final long serialVersionUID = -7437561302249475096L;
public EETextPane() {
super();
//add styles to document
Style def = StyleContext.getDefaultStyleContext().getStyle( StyleContext.DEFAULT_STYLE );
StyleConstants.setForeground(def, Color.BLACK);
StyleConstants.setFontFamily(def, "Courier");
StyleConstants.setFontSize(def, 12);
Style keyword = addStyle("keyword", def);
StyleConstants.setForeground(keyword, Color.BLUE);
Style literal = addStyle("literal", def);
StyleConstants.setForeground(literal, Color.ORANGE);
Style comment = addStyle("comment", def);
StyleConstants.setForeground(comment, Color.GREEN);
}
}
private class EEConsole extends JTextPane {
/**
*
*/
private static final long serialVersionUID = -5968199559991291905L;
public EEConsole() {
super();
//add styles to document
Style def = StyleContext.getDefaultStyleContext().getStyle( StyleContext.DEFAULT_STYLE );
StyleConstants.setForeground(def, Color.BLACK);
StyleConstants.setFontFamily(def, "Courier");
StyleConstants.setFontSize(def, 12);
Style keyword = addStyle("error", def);
StyleConstants.setForeground(keyword, Color.RED);
Style literal = addStyle("success", def);
StyleConstants.setForeground(literal, Color.GREEN);
}
}
private class EEStatusBar extends JPanel {
/**
*
*/
private static final long serialVersionUID = 185007911993347696L;
private BoxLayout layout;
private JLabel linesLabel, lines, wordsLabel, words;
public EEStatusBar() {
super();
layout = new BoxLayout(this, BoxLayout.X_AXIS);
setLayout(layout);
linesLabel = new JLabel("Lines : ");
linesLabel.setAlignmentX(LEFT_ALIGNMENT);
add(linesLabel);
lines = new JLabel("");
lines.setAlignmentX(LEFT_ALIGNMENT);
add(lines);
add(Box.createRigidArea(new Dimension(10,10)));
wordsLabel = new JLabel("Java Words : ");
wordsLabel.setAlignmentX(LEFT_ALIGNMENT);
add(wordsLabel);
words = new JLabel("");
words.setAlignmentX(LEFT_ALIGNMENT);
add(words);
}
public void setLines(int lines) {
/*TODO set line numbers */
}
public void setJavaWords(int words) {
/*TODO set java keyword numbers*/
}
}
}
//class Main
package editor.app;
import javax.swing.JFrame;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import elearning.editor.gui.EEFrame;
import elearning.editor.util.EECodeFormater;
import elearning.editor.util.EEJavaWordCounter;
import elearning.editor.util.EELineCounter;
public class EEditor {
/**
* #param args
*/
public static void main(String[] args) {
try {
// Set cross-platform Java L&F (also called "Metal")
//UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
//Set Motif L&F
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
//Set Nimbus L&F
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
//Set System L&F
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
//Set GTK L&F --> Same as System L&F on Linux and Solaris\
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
//Set Windows L&F --> Same as System L&F on Windows
//UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
}
catch (UnsupportedLookAndFeelException e) {
// handle exception
}
catch (ClassNotFoundException e) {
// handle exception
}
catch (InstantiationException e) {
// handle exception
}
catch (IllegalAccessException e) {
// handle exception
}
EEFrame frame = new EEFrame();
frame.setSize(500, 600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
/* TODO Instatiate Threads */
/*TODO Start Threads */
}
}
Also i provide a mockup of it:
Mockup

First you should have a look at the File class. It provides you methods to create, open, modify and save files. To read files you also might want to give BufferedReader or any other Reader a shot.
Creating a file: File has the method createNewFile(), use it in combination with exists().
To open and read a file use a try-with-resource (There's actually a nice tutorial about it in the Java Manuals).
To save a file you should check out the FileWriter, it can write strings or append them to files.
For your editor you might want to replace the before mentioned BufferedReader with a LineReader, which also provides methods to get the line number. Other than that you have to figure out yourself how to number the lines. (Actually it's just googling around a lot, there will be some ideas like this one - which I didn't check in detail but it might help).
Of course for the editor you should first read the file into a string, use a formatter for it and then you can present it and reformat it when needed.
Apart from these hints I can not provide you with more detailed answers, as you can also read in the comments it would be easier if you would provide more detailed questions. You now just gave us a GUI which has almost nothing to do with your actual problems.
Show us some of your (problematic) work and we can help you, but otherwise we can not do much more than giving you some hints as I just did. So try to think about your problems, try how to ask for more precise answers and open some new questions if you want.
But don't forget to check out the site for answers, for me almost all of my questions I'd like to ask are already asked somewhere in a similar manner.

Hello again lets split work into steps ,
firstly i would like to create the new,open,save ,save as , export into pdf menu and event
below is the code that i used ,the GUI frame open correctly with new ,open,save, save as ,export into pdf labels but as action nothing happened.
Could someone write to me the correct code for that? be in mind i am very java beginner.
public EEMenuBar() {
super();
fileMenu = new JMenu("File");
//Create the New menu item
newItem = new JMenuItem("New");
newItem.setMnemonic(KeyEvent.VK_N);
newItem.addActionListener(new ActionListener(){
#Override
public void actionPerformed(ActionEvent arg0) {
}
});
fileMenu.add(newItem);
openItem = new JMenuItem("Open");
openItem.setMnemonic(KeyEvent.VK_0);
openItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent arg0) {
/*TODO Open existing java source file*/
}
});
fileMenu.add(openItem);
saveItem = new JMenuItem("Save");
saveItem.setMnemonic(KeyEvent.VK_S);
saveItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
/*TODO save changes to file*/
}
});
fileMenu.add(saveItem);
saveAsItem = new JMenuItem("Save As");
saveAsItem.setMnemonic(KeyEvent.VK_A);
saveAsItem.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
/*TODO Save as new java source file*/
}
});
fileMenu.add(saveAsItem);
exportItem = new JMenuItem("Export to pdf");
exportItem.setMnemonic(KeyEvent.VK_E);
exportItem.addActionListener(new ActionListener(){
#Override
public void actionPerformed(ActionEvent arg0) {
// TODO save as pdf(formatted)
}
});
fileMenu.add(exportItem);

Different behavior of JDialog when is created by program and by user action

I have 3 clasess : Loader, MyDialog and TEST(with main method). (for code see below)
Everything I want to achieve is create simple dialog with JLabel and JProgressBar, which will notify user about how much time remains to show MyDialog. MyDialog is Jdialog with time consuming operation in constructor (loading data from database etc.).
In code below is model situation. When "MyDialog" is created by main (constant BY_USER is false), everything working exactly i want to. But when i make dialog with button , and instance of MyDialog is created after button press (constant BY_USER is true), Loader is blank white form. It looks like is not completed.
Loader is extending Thread, so i suppose that problem will be in threading (event dispatch thread)? I dont know, what is wrong and how fix it. Please help.
Thanks and sorry for my English.
CLASS TEST :
package test;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
public class TEST {
public static final boolean BY_USER = false;
public static void main(String[] args) {
if (BY_USER) {
JFrame mainDialog = new JFrame("Main");
JButton show = new JButton("Show MyDialog");
show.addActionListener(new ActionListener() {
#Override
public void actionPerformed(ActionEvent e) {
MyDialog dialog = new MyDialog();
}
});
mainDialog.add(show);
mainDialog.setLocationRelativeTo(null);
mainDialog.setMinimumSize(new Dimension(160, 80));
mainDialog.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
mainDialog.setVisible(true);
} else {
MyDialog dialog = new MyDialog();
}
}
}
CLASS MyDialog :
package test;
import javax.swing.JFrame;
import javax.swing.WindowConstants;
public class MyDialog extends JFrame{
public MyDialog() {
super();
// making loader with title, first message and count of steps of operation
Loader loader = new Loader("Loader", "First showed message", 100);
loader.ShowLoader();
// time-consuming operation (loading data from database etc.).
// for clarity replaced with for statement
int j=0;
for(int i=0; i<Integer.MAX_VALUE; i++)
{
j++;
if(j==Integer.MAX_VALUE/100){
// updating loader message and progress bar value
loader.NewAction(Integer.MAX_VALUE - i+"");
j=0;
}
}
// closing loader
loader.DestroyLoader();
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
this.setSize(300, 300);
this.setLocationRelativeTo(null);
this.setVisible(true);
}
}
CLASS Loader:
package test;
import java.awt.BorderLayout;
import java.awt.Dialog;
import java.awt.Dimension;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JProgressBar;
import javax.swing.SwingConstants;
public class Loader extends Thread{
private JDialog dialog;
private JLabel message = new JLabel("", SwingConstants.CENTER);
private JProgressBar progressBar = new JProgressBar(0, 100);
private String newMessage;
private double percentForStep;
private int remainingSteps;
public Loader(String taskName, String firstMessage, int steps) {
this.remainingSteps = steps-1;
dialog = new JDialog((Dialog) null, taskName);
dialog.setLayout(new BorderLayout(15, 15));
dialog.add(message, BorderLayout.CENTER);
dialog.add(progressBar, BorderLayout.SOUTH);
message.setText(firstMessage);
percentForStep = 100 / steps;
}
public void ShowLoader()
{
dialog.setMinimumSize(new Dimension(400,120));
dialog.setLocationRelativeTo(null);
dialog.setVisible(true);
this.start();
}
public void DestroyLoader(){
dialog.dispose();
this.interrupt();
}
public void NewAction(String newMessage){
this.newMessage = newMessage;
this.remainingSteps--;
Lock.changed = true;
}
public int RemainingStepsCount()
{
return remainingSteps;
}
#Override
#SuppressWarnings({"CallToThreadYield", "SleepWhileInLoop"})
public void run() {
do{
synchronized (Lock.class) {
if (Lock.changed) {
Lock.changed = false;
this.message.setText(newMessage);
this.progressBar.setValue((int)(100-(remainingSteps*percentForStep)));
dialog.repaint();
}
dialog.repaint();
}
}while(true);
}
}
class Lock{
static boolean changed = false;
}

Look to SwingWorker and his use; I think it can help you to solve the problem.

JEditorPane linewrap in Java7

First of all I hope it's not a problem I started a new topic. Tbh I don't have a clue how to ask a question based on an already answered one, so I made this.
I'm pretty new with Java and my problem is the following. I'm writing a little chat program and I'm using a JEditorPane with an HTMLEditorKit to display text in different colors, to display smileys, and display hyperlinks.
My problem is, and after some research I found out the problem might be due to Java7, I can't get the linewrap working properly. I want the text to word wrap and to wrap in the middle of Strings exceeding the width of the component.
The word wrap works fine, but if someone types in a pretty long string the JEditorPane gets expanded and you need to resize the frame to get everything on screen, which is what I do not want to happen.
I've tried a few fixes for this problem, but they only allow letter wrap such that word wrap no longer works. Beside that, I want the user to be able to wrap his text by hitting Enter. For that I'm adding \n to the text and with the fixes this will no longer affect the result and everything's going to be displayed in one line.
I'm feeling like I've spent years in the web to find a solution but unitl now nothing worked for my case, especially since it appeared to be the same fix all the time. I hope you guys can help me.
This means in summary:
What I have:
Line wraps word in case of long strings separated by spaces
if you use Windows and your input contains line wraps created by hitting enter, they will also wrap
If you type in a very long string without spaces, the panel gets expanded and you need to resize the frame
HTML formatting allows me to display different colors as well as hyperlinks and emoticons
What I need:
Word wrap behaviour like it is at the moment in case it is possible but letter wrap ONLY in case of long strings not separated by spaces to prevent the panel from expanding.
Manually added line wraps made by hitting ENTER in the input area or if I copy an pre formatted text into the input panel
HTML formatting like I have already
What I've tried and what didn't help:
jtextpane doesn't wrap text and
JTextPane is not wrapping text
Here is some code to try it yourself. In the bottom left is an input area to type in some text. You can also add line wraps by hitting enter. After clicking on the button you will see the text in the area above.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.TitledBorder;
import javax.swing.text.BadLocationException;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.StyleSheet;
#SuppressWarnings("serial")
public class LineWrapTest extends JFrame implements ActionListener, KeyListener {
private JButton btnSend;
private JTextArea textAreaIn;
private JEditorPane textAreaOut;
private HTMLEditorKit kit;
private HTMLDocument doc;
public LineWrapTest() {
this.setSize(600, 500);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setTitle("Linewrap Test");
}
/**
* Not important for problem
*/
public void paintScreen() {
this.setLayout(new BorderLayout());
this.add(this.getPanelOut(), BorderLayout.CENTER);
this.add(this.getPanelIn(), BorderLayout.SOUTH);
this.textAreaIn.requestFocusInWindow();
this.setVisible(true);
}
/**
* Not important for problem
*
* #return panelOut
*/
private JPanel getPanelOut() {
JPanel panelOut = new JPanel();
panelOut.setLayout(new BorderLayout());
this.textAreaOut = new JEditorPane();
this.textAreaOut.setEditable(false);
this.textAreaOut.setContentType("text/html");
this.kit = new HTMLEditorKit();
this.doc = new HTMLDocument();
StyleSheet styleSheet = this.kit.getStyleSheet();
this.kit.setStyleSheet(styleSheet);
this.textAreaOut.setEditorKit(this.kit);
this.textAreaOut.setDocument(this.doc);
TitledBorder border = BorderFactory.createTitledBorder("Output");
border.setTitleJustification(TitledBorder.CENTER);
panelOut.setBorder(border);
panelOut.add(this.textAreaOut);
return panelOut;
}
/**
* Not important for problem
*
* #return panelIn
*/
private JPanel getPanelIn() {
JPanel panelIn = new JPanel();
panelIn.setLayout(new BorderLayout());
this.textAreaIn = new JTextArea();
this.textAreaIn.setLineWrap(true);
this.textAreaIn.setWrapStyleWord(true);
TitledBorder border = BorderFactory.createTitledBorder("Input");
border.setTitleJustification(TitledBorder.CENTER);
panelIn.setBorder(border);
panelIn.add(this.getBtnSend(), BorderLayout.EAST);
panelIn.add(this.textAreaIn, BorderLayout.CENTER);
return panelIn;
}
/**
* Not important for problem
*
* #return btnSend
*/
private JButton getBtnSend() {
this.btnSend = new JButton("Send");
this.btnSend.addActionListener(this);
return this.btnSend;
}
private void append(String text) {
try {
this.kit.insertHTML(this.doc, this.doc.getLength(), text, 0, 0, null);
} catch (BadLocationException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String getHTMLText() {
String txtIn = this.textAreaIn.getText().trim().replaceAll(SEPARATOR, "<br/>");
StringBuffer htmlBuilder = new StringBuffer();
htmlBuilder.append("<HTML>");
htmlBuilder.append(txtIn);
htmlBuilder.append("</HTML>");
return htmlBuilder.toString();
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == this.btnSend) {
this.append(this.getHTMLText());
this.textAreaIn.setText("");
this.textAreaIn.requestFocusInWindow();
}
}
public static void main(String[] args) {
LineWrapTest test = new LineWrapTest();
test.paintScreen();
}
#Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER)
if (!this.textAreaIn.getText().trim().isEmpty())
this.textAreaIn.setText(this.textAreaIn.getText() + SEPARATOR);
}
#Override
public void keyReleased(KeyEvent e) {
}
#Override
public void keyTyped(KeyEvent e) {
}
}
UPDATE:
base on some parts of http://java-sl.com/tip_java7_text_wrapping_bug_fix.html
Somehow I figured it out to step a bit closer to my goal. I've tried to combine the fix for an HTMLEditorKit with an StlyedEditorKit Fix. But I have to be honest, I don't have any clue what I actually did there :( The sad thing is, the manual line wraping does no longer work with this as a replacement of the HTMLEditorKit.
Maybe you can use this as a base for some better implementation.
To use it in my example just create a new class in the project with the CustomEditorKit and replace the HTMLEditorKit in the example with this CustomEditorKit.
You will notice that word and letter wrapping works now, but if you hit ENTER to get your own line wrap this change will no longer appear in the output-panel and everything will be displayed in one line.
Another strange problem of it is, that if you resize the frame the lines will sometimes lay on each other.
import javax.swing.SizeRequirements;
import javax.swing.text.Element;
import javax.swing.text.View;
import javax.swing.text.ViewFactory;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.ParagraphView;
#SuppressWarnings("serial")
public class CustomEditorKit extends HTMLEditorKit {
#Override
public ViewFactory getViewFactory() {
return new HTMLFactory() {
#Override
public View create(Element e) {
View v = super.create(e);
if (v instanceof InlineView) {
return new InlineView(e) {
#Override
public int getBreakWeight(int axis, float pos, float len) {
return GoodBreakWeight;
}
#Override
public View breakView(int axis, int p0, float pos, float len) {
if (axis == View.X_AXIS) {
this.checkPainter();
this.removeUpdate(null, null, null);
}
return super.breakView(axis, p0, pos, len);
}
};
}
else if (v instanceof ParagraphView) {
return new ParagraphView(e) {
#Override
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
}
float pref = this.layoutPool.getPreferredSpan(axis);
float min = this.layoutPool.getMinimumSpan(axis);
// Don't include insets, Box.getXXXSpan will include them.
r.minimum = (int) min;
r.preferred = Math.max(r.minimum, (int) pref);
r.maximum = Integer.MAX_VALUE;
r.alignment = 0.5f;
return r;
}
};
}
return v;
}
};
}
}

OK! So, I finally got everything you were having problems with working. It took some research and a lot of trial and error, but here it is:
Here is what I did:
Put the JEditorPane in a JScrollPane so you can scroll up and down as the message gets bigger
Added a custom word wrap. The custom word wrap will wrap words and long words in the desired location of the word. You were right, this is a bug with the current version of Java. http://bugs.sun.com/view_bug.do?bug_id=7125737
Added the ability for the user to wrap to a new line by hitting Enter. This interfered with the custom word wrap though, so you may not like how I achieved this. In the code example I suggest other options.
Preserved your HTMLDocument abilities. I was tempted to not do this, but I found work arounds so that it could be preserved.
The application still uses a JEditorPane, but you could switch it to a JTextPane if you want. I tried both and they were both functional.
So here is the code. It's a bit long and you may wish to change it based on your preferences. I commented where I made changes and tried to explain them.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.IOException;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.KeyStroke;
import javax.swing.SizeRequirements;
import javax.swing.border.TitledBorder;
import javax.swing.text.*;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.StyleSheet;
#SuppressWarnings("serial")
public class LineWrapTest extends JFrame implements ActionListener, KeyListener {
//This is the separator.
private String SEPARATOR = System.getProperty("line.separator");
private JButton btnSend;
private JTextArea textAreaIn;
private JEditorPane textAreaOut;
private JScrollPane outputScrollPane;
private HTMLEditorKit kit;
private HTMLDocument doc;
public LineWrapTest() {
this.setSize(600, 500);
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setLocationRelativeTo(null);
this.setTitle("Linewrap Test");
}
/**
* Not important for problem
*/
public void paintScreen() {
this.setLayout(new BorderLayout());
this.add(this.getPanelOut(), BorderLayout.CENTER);
this.add(this.getPanelIn(), BorderLayout.SOUTH);
this.textAreaIn.requestFocusInWindow();
this.setVisible(true);
}
/**
* Not important for problem
*
* #return panelOut
*/
private JPanel getPanelOut() {
JPanel panelOut = new JPanel();
panelOut.setLayout(new BorderLayout());
this.textAreaOut = new JEditorPane();
this.textAreaOut.setEditable(false);
this.textAreaOut.setContentType("text/html");
//I added this scroll pane.
this.outputScrollPane = new JScrollPane(this.textAreaOut);
/*
* This is a whole whack of code. It's a combination of two sources.
* It achieves the wrapping you desire: by word and longgg strings
* It is a custom addition to HTMLEditorKit
*/
this.kit = new HTMLEditorKit(){
#Override
public ViewFactory getViewFactory(){
return new HTMLFactory(){
public View create(Element e){
View v = super.create(e);
if(v instanceof InlineView){
return new InlineView(e){
public int getBreakWeight(int axis, float pos, float len) {
//return GoodBreakWeight;
if (axis == View.X_AXIS) {
checkPainter();
int p0 = getStartOffset();
int p1 = getGlyphPainter().getBoundedPosition(this, p0, pos, len);
if (p1 == p0) {
// can't even fit a single character
return View.BadBreakWeight;
}
try {
//if the view contains line break char return forced break
if (getDocument().getText(p0, p1 - p0).indexOf(SEPARATOR) >= 0) {
return View.ForcedBreakWeight;
}
}
catch (BadLocationException ex) {
//should never happen
}
}
return super.getBreakWeight(axis, pos, len);
}
public View breakView(int axis, int p0, float pos, float len) {
if (axis == View.X_AXIS) {
checkPainter();
int p1 = getGlyphPainter().getBoundedPosition(this, p0, pos, len);
try {
//if the view contains line break char break the view
int index = getDocument().getText(p0, p1 - p0).indexOf(SEPARATOR);
if (index >= 0) {
GlyphView v = (GlyphView) createFragment(p0, p0 + index + 1);
return v;
}
}
catch (BadLocationException ex) {
//should never happen
}
}
return super.breakView(axis, p0, pos, len);
}
};
}
else if (v instanceof ParagraphView) {
return new ParagraphView(e) {
protected SizeRequirements calculateMinorAxisRequirements(int axis, SizeRequirements r) {
if (r == null) {
r = new SizeRequirements();
}
float pref = layoutPool.getPreferredSpan(axis);
float min = layoutPool.getMinimumSpan(axis);
// Don't include insets, Box.getXXXSpan will include them.
r.minimum = (int)min;
r.preferred = Math.max(r.minimum, (int) pref);
r.maximum = Integer.MAX_VALUE;
r.alignment = 0.5f;
return r;
}
};
}
return v;
}
};
}
};
this.doc = new HTMLDocument();
StyleSheet styleSheet = this.kit.getStyleSheet();
this.kit.setStyleSheet(styleSheet);
this.textAreaOut.setEditorKit(this.kit);
this.textAreaOut.setDocument(this.doc);
TitledBorder border = BorderFactory.createTitledBorder("Output");
border.setTitleJustification(TitledBorder.CENTER);
panelOut.setBorder(border);
//I changed this to add the scrollpane, which now contains
//the JEditorPane
panelOut.add(this.outputScrollPane);
return panelOut;
}
/**
* Not important for problem
*
* #return panelIn
*/
private JPanel getPanelIn() {
JPanel panelIn = new JPanel();
panelIn.setLayout(new BorderLayout());
this.textAreaIn = new JTextArea();
this.textAreaIn.setLineWrap(true);
this.textAreaIn.setWrapStyleWord(true);
//This disables enter from going to a new line. Your key listener does that.
this.textAreaIn.getInputMap().put(KeyStroke.getKeyStroke("ENTER"), "none");
//For the key listener to work, it needs to be added to the component
this.textAreaIn.addKeyListener(this);
TitledBorder border = BorderFactory.createTitledBorder("Input");
border.setTitleJustification(TitledBorder.CENTER);
panelIn.setBorder(border);
panelIn.add(this.getBtnSend(), BorderLayout.EAST);
panelIn.add(this.textAreaIn, BorderLayout.CENTER);
return panelIn;
}
/**
* Not important for problem
*
* #return btnSend
*/
private JButton getBtnSend() {
this.btnSend = new JButton("Send");
this.btnSend.addActionListener(this);
return this.btnSend;
}
private void append(String text) {
try {
this.kit.insertHTML(this.doc, this.doc.getLength(), text, 0, 0, null);
} catch (BadLocationException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private String getHTMLText() {
//I tried to find a work around for this but I couldn't. It could be done
//by manipulating the HTMLDocument but it's beyond me. Notice I changed
//<br/> to <p/>. For some reason, <br/> no longer went to the next line
//when I added the custom wrap. <p/> seems to work though.
String txtIn = this.textAreaIn.getText().trim().replaceAll(SEPARATOR, "<p/>");
//My IDE recommends you use StringBuilder instead, that's up to you.
//I am not sure what the difference would be.
StringBuffer htmlBuilder = new StringBuffer();
htmlBuilder.append("<HTML>");
htmlBuilder.append(txtIn);
htmlBuilder.append("</HTML>");
return htmlBuilder.toString();
}
#Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == this.btnSend) {
this.append(this.getHTMLText());
this.textAreaIn.setText("");
this.textAreaIn.requestFocusInWindow();
}
}
public static void main(String[] args) {
LineWrapTest test = new LineWrapTest();
test.paintScreen();
}
#Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER){
if (!this.textAreaIn.getText().trim().isEmpty()) {
//I made this work by defining the SEPARATOR.
//You could use append(Separator) instead if you want.
this.textAreaIn.setText(this.textAreaIn.getText() + SEPARATOR);
}
}
}
#Override
public void keyReleased(KeyEvent e) {
}
#Override
public void keyTyped(KeyEvent e) {
}
}
Here are (most of) the links that I used to solve this problem:
Enabling word wrap in a JTextPane with HTMLDocument
Custom wrap is a combination of these two:
http://java-sl.com/tip_html_letter_wrap.html
http://java-sl.com/wrap.html
Deleting the keybind for JTextArea:
http://docs.oracle.com/javase/tutorial/uiswing/misc/keybinding.html
If you have any questions whatsoever, just comment below. I will answer them. I sincerely hope this solves your problems

A deadly better solution I found :
The <br> is correctly handled by the HTMLEditorKit, but the Patrick Sebastien's post mentionned that it won't. It's because its ViewFactory threat all InlineView object as wrappable, but the BRView is also an InlineView. See my solution below:
class WrapColumnFactory extends HTMLEditorKit.HTMLFactory {
#Override
public View create(Element elem) {
View v = super.create(elem);
if (v instanceof LabelView) {
// the javax.swing.text.html.BRView (representing <br> tag) is a LabelView but must not be handled
// by a WrapLabelView. As BRView is private, check the html tag from elem attribute
Object o = elem.getAttributes().getAttribute(StyleConstants.NameAttribute);
if ((o instanceof HTML.Tag) && o == HTML.Tag.BR) {
return v;
}
return new WrapLabelView(elem);
}
return v;
}
}
class WrapLabelView extends LabelView {
public WrapLabelView(Element elem) {
super(elem);
}
#Override
public float getMinimumSpan(int axis) {
switch (axis) {
case View.X_AXIS:
return 0;
case View.Y_AXIS:
return super.getMinimumSpan(axis);
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
}