Fiz um simples editor de Texto conforme o exercício do livro "Big Java" utilizando o NetBeans porêm não faço idéia de como salvar em .txt um arquivo, podem fornecer a solução, exemplo, em fim qualquer coisa para ajudar??
/*
* UmEditorDetextosimplesView.java
*/
package umeditordetextosimples;
import org.jdesktop.application.Action;
import org.jdesktop.application.ResourceMap;
import org.jdesktop.application.SingleFrameApplication;
import org.jdesktop.application.FrameView;
import org.jdesktop.application.TaskMonitor;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Timer;
import javax.swing.Icon;
import javax.swing.JDialog;
import javax.swing.JFrame;
/**
* The application's main frame.
*/
public class UmEditorDetextosimplesView extends FrameView {
public UmEditorDetextosimplesView(SingleFrameApplication app) {
super(app);
initComponents();
// status bar initialization - message timeout, idle icon and busy animation, etc
ResourceMap resourceMap = getResourceMap();
int messageTimeout = resourceMap.getInteger("StatusBar.messageTimeout");
messageTimer = new Timer(messageTimeout, new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
messageTimer.setRepeats(false);
int busyAnimationRate = resourceMap.getInteger("StatusBar.busyAnimationRate");
for (int i = 0; i < busyIcons.length; i++) {
busyIcons[i] = resourceMap.getIcon("StatusBar.busyIcons[" + i + "]");
}
busyIconTimer = new Timer(busyAnimationRate, new ActionListener() {
public void actionPerformed(ActionEvent e) {
busyIconIndex = (busyIconIndex + 1) % busyIcons.length;
}
});
idleIcon = resourceMap.getIcon("StatusBar.idleIcon");
// connecting action tasks to status bar via TaskMonitor
TaskMonitor taskMonitor = new TaskMonitor(getApplication().getContext());
taskMonitor.addPropertyChangeListener(new java.beans.PropertyChangeListener() {
public void propertyChange(java.beans.PropertyChangeEvent evt) {
String propertyName = evt.getPropertyName();
if ("started".equals(propertyName)) {
if (!busyIconTimer.isRunning()) {
busyIconIndex = 0;
busyIconTimer.start();
}
} else if ("done".equals(propertyName)) {
busyIconTimer.stop();
} else if ("message".equals(propertyName)) {
String text = (String)(evt.getNewValue());
messageTimer.restart();
} else if ("progress".equals(propertyName)) {
int value = (Integer)(evt.getNewValue());
}
}
});
}
@Action
public void showAboutBox() {
if (aboutBox == null) {
JFrame mainFrame = UmEditorDetextosimplesApp.getApplication().getMainFrame();
aboutBox = new UmEditorDetextosimplesAboutBox(mainFrame);
aboutBox.setLocationRelativeTo(mainFrame);
}
UmEditorDetextosimplesApp.getApplication().show(aboutBox);
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
mainPanel = new javax.swing.JPanel();
scrollPane1 = new java.awt.ScrollPane();
jScrollPane1 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
menuBar = new javax.swing.JMenuBar();
javax.swing.JMenu fileMenu = new javax.swing.JMenu();
javax.swing.JMenuItem exitMenuItem = new javax.swing.JMenuItem();
jMenuItem1 = new javax.swing.JMenuItem();
jMenuItem2 = new javax.swing.JMenuItem();
javax.swing.JMenu helpMenu = new javax.swing.JMenu();
javax.swing.JMenuItem aboutMenuItem = new javax.swing.JMenuItem();
jFileChooser1 = new javax.swing.JFileChooser();
mainPanel.setName("mainPanel"); // NOI18N
scrollPane1.setName("scrollPane1"); // NOI18N
jScrollPane1.setName("jScrollPane1"); // NOI18N
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jTextArea1.setName("jTextArea1"); // NOI18N
jScrollPane1.setViewportView(jTextArea1);
scrollPane1.add(jScrollPane1);
javax.swing.GroupLayout mainPanelLayout = new javax.swing.GroupLayout(mainPanel);
mainPanel.setLayout(mainPanelLayout);
mainPanelLayout.setHorizontalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(scrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
);
mainPanelLayout.setVerticalGroup(
mainPanelLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(scrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 274, Short.MAX_VALUE)
);
menuBar.setName("menuBar"); // NOI18N
org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(umeditordetextosimples.UmEditorDetextosimplesApp.class).getContext().getResourceMap(UmEditorDetextosimplesView.class);
fileMenu.setText(resourceMap.getString("fileMenu.text")); // NOI18N
fileMenu.setName("fileMenu"); // NOI18N
javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(umeditordetextosimples.UmEditorDetextosimplesApp.class).getContext().getActionMap(UmEditorDetextosimplesView.class, this);
exitMenuItem.setAction(actionMap.get("quit")); // NOI18N
exitMenuItem.setName("exitMenuItem"); // NOI18N
fileMenu.add(exitMenuItem);
jMenuItem1.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_S, java.awt.event.InputEvent.CTRL_MASK));
jMenuItem1.setText(resourceMap.getString("jMenuItem1.text")); // NOI18N
jMenuItem1.setName("jMenuItem1"); // NOI18N
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jMenuItem1ActionPerformed(evt);
}
});
fileMenu.add(jMenuItem1);
jMenuItem2.setAccelerator(javax.swing.KeyStroke.getKeyStroke(java.awt.event.KeyEvent.VK_L, java.awt.event.InputEvent.CTRL_MASK));
jMenuItem2.setText(resourceMap.getString("jMenuItem2.text")); // NOI18N
jMenuItem2.setName("jMenuItem2"); // NOI18N
fileMenu.add(jMenuItem2);
menuBar.add(fileMenu);
helpMenu.setText(resourceMap.getString("helpMenu.text")); // NOI18N
helpMenu.setName("helpMenu"); // NOI18N
aboutMenuItem.setAction(actionMap.get("showAboutBox")); // NOI18N
aboutMenuItem.setName("aboutMenuItem"); // NOI18N
helpMenu.add(aboutMenuItem);
menuBar.add(helpMenu);
jFileChooser1.setName("jFileChooser1"); // NOI18N
setComponent(mainPanel);
setMenuBar(menuBar);
}// </editor-fold>
private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt) {
if (jFileChooser1 == null) {
}
UmEditorDetextosimplesApp.getApplication().show(aboutBox);
// TODO add your handling code here:
}
// Variables declaration - do not modify
private javax.swing.JFileChooser jFileChooser1;
private javax.swing.JMenuItem jMenuItem1;
private javax.swing.JMenuItem jMenuItem2;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JPanel mainPanel;
private javax.swing.JMenuBar menuBar;
private java.awt.ScrollPane scrollPane1;
// End of variables declaration
private final Timer messageTimer;
private final Timer busyIconTimer;
private final Icon idleIcon;
private final Icon[] busyIcons = new Icon[15];
private int busyIconIndex = 0;
private JDialog aboutBox;
}/*
* UmEditorDetextosimplesAboutBox.java
*/
package umeditordetextosimples;
import org.jdesktop.application.Action;
public class UmEditorDetextosimplesAboutBox extends javax.swing.JDialog {
public UmEditorDetextosimplesAboutBox(java.awt.Frame parent) {
super(parent);
initComponents();
getRootPane().setDefaultButton(closeButton);
}
@Action public void closeAboutBox() {
dispose();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
closeButton = new javax.swing.JButton();
javax.swing.JLabel appTitleLabel = new javax.swing.JLabel();
javax.swing.JLabel imageLabel = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);
org.jdesktop.application.ResourceMap resourceMap = org.jdesktop.application.Application.getInstance(umeditordetextosimples.UmEditorDetextosimplesApp.class).getContext().getResourceMap(UmEditorDetextosimplesAboutBox.class);
setTitle(resourceMap.getString("title")); // NOI18N
setModal(true);
setName("aboutBox"); // NOI18N
setResizable(false);
javax.swing.ActionMap actionMap = org.jdesktop.application.Application.getInstance(umeditordetextosimples.UmEditorDetextosimplesApp.class).getContext().getActionMap(UmEditorDetextosimplesAboutBox.class, this);
closeButton.setAction(actionMap.get("closeAboutBox")); // NOI18N
closeButton.setName("closeButton"); // NOI18N
appTitleLabel.setFont(appTitleLabel.getFont().deriveFont(appTitleLabel.getFont().getStyle() | java.awt.Font.BOLD, appTitleLabel.getFont().getSize()+4));
appTitleLabel.setText(resourceMap.getString("Application.title")); // NOI18N
appTitleLabel.setName("appTitleLabel"); // NOI18N
imageLabel.setIcon(resourceMap.getIcon("imageLabel.icon")); // NOI18N
imageLabel.setName("imageLabel"); // NOI18N
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(imageLabel)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(appTitleLabel, javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(closeButton))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(imageLabel, javax.swing.GroupLayout.PREFERRED_SIZE, 183, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(appTitleLabel)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 111, Short.MAX_VALUE)
.addComponent(closeButton)
.addContainerGap())
);
pack();
}// </editor-fold>
// Variables declaration - do not modify
private javax.swing.JButton closeButton;
// End of variables declaration
}
/*
* UmEditorDetextosimplesApp.java
*/
package umeditordetextosimples;
import org.jdesktop.application.Application;
import org.jdesktop.application.SingleFrameApplication;
/**
* The main class of the application.
*/
public class UmEditorDetextosimplesApp extends SingleFrameApplication {
/**
* At startup create and show the main frame of the application.
*/
@Override protected void startup() {
show(new UmEditorDetextosimplesView(this));
}
/**
* This method is to initialize the specified window by injecting resources.
* Windows shown in our application come fully initialized from the GUI
* builder, so this additional configuration is not needed.
*/
@Override protected void configureWindow(java.awt.Window root) {
}
/**
* A convenient static getter for the application instance.
* @return the instance of UmEditorDetextosimplesApp
*/
public static UmEditorDetextosimplesApp getApplication() {
return Application.getInstance(UmEditorDetextosimplesApp.class);
}
/**
* Main method launching the application.
*/
public static void main(String[] args) {
launch(UmEditorDetextosimplesApp.class, args);
}
}
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Alterado de JTextField para Area porque me confundi
e precisa de um método para gravar, vamos lá: