ich hab hier was interessantes
[highlight=Java]
import javax.swing.*;
import java.util.*;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import java.awt.event.ActionEvent;
import javax.swing.text.BadLocationException;
import javax.swing.GroupLayout.*;
public class TextAreaDemo extends JFrame
implements DocumentListener {
private JLabel jLabel1;
private JScrollPane jScrollPane1;
private JTextArea textArea;
private static final String COMMIT_ACTION = "commit";
private static enum Mode { INSERT, COMPLETION };
private final List<String> words;
private Mode mode = Mode.INSERT;
public TextAreaDemo() {
super("TextAreaDemo");
initComponents();
textArea.getDocument().addDocumentListener(this);
InputMap im = textArea.getInputMap();
ActionMap am = textArea.getActionMap();
im.put(KeyStroke.getKeyStroke("ENTER"), COMMIT_ACTION);
am.put(COMMIT_ACTION, new CommitAction());
words = new ArrayList<String>(5);
words.add("spark");
words.add("special");
words.add("spectacles");
words.add("spectacular");
words.add("swing");
}
private void initComponents() {
jLabel1 = new JLabel("Try typing 'spectacular' or 'Swing'...");
textArea = new JTextArea();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
textArea.setColumns(20);
textArea.setLineWrap(true);
textArea.setRows(5);
textArea.setWrapStyleWord(true);
jScrollPane1 = new JScrollPane(textArea);
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
//Create a parallel group for the horizontal axis
ParallelGroup hGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential and a parallel groups
SequentialGroup h1 = layout.createSequentialGroup();
ParallelGroup h2 = layout.createParallelGroup(GroupLayout.Alignment.TRAILING);
//Add a scroll panel and a label to the parallel group h2
h2.addComponent(jScrollPane1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 212, Short.MAX_VALUE);
h2.addComponent(jLabel1, GroupLayout.Alignment.LEADING, GroupLayout.DEFAULT_SIZE, 212, Short.MAX_VALUE);
//Add a container gap to the sequential group h1
h1.addContainerGap();
// Add the group h2 to the group h1
h1.addGroup(h2);
h1.addContainerGap();
//Add the group h1 to hGroup
hGroup.addGroup(Alignment.TRAILING,h1);
//Create the horizontal group
layout.setHorizontalGroup(hGroup);
//Create a parallel group for the vertical axis
ParallelGroup vGroup = layout.createParallelGroup(GroupLayout.Alignment.LEADING);
//Create a sequential group
SequentialGroup v1 = layout.createSequentialGroup();
//Add a container gap to the sequential group v1
v1.addContainerGap();
//Add a label to the sequential group v1
v1.addComponent(jLabel1);
v1.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED);
//Add scroll panel to the sequential group v1
v1.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 100, Short.MAX_VALUE);
v1.addContainerGap();
//Add the group v1 to vGroup
vGroup.addGroup(v1);
//Create the vertical group
layout.setVerticalGroup(vGroup);
pack();
}
// Listener methods
public void changedUpdate(DocumentEvent ev) {
}
public void removeUpdate(DocumentEvent ev) {
}
public void insertUpdate(DocumentEvent ev) {
if (ev.getLength() != 1) {
return;
}
int pos = ev.getOffset();
String content = null;
try {
content = textArea.getText(0, pos + 1);
} catch (BadLocationException e) {
e.printStackTrace();
}
// Find where the word starts
int w;
for (w = pos; w >= 0; w--) {
if (! Character.isLetter(content.charAt(w))) {
break;
}
}
if (pos - w < 2) {
// Too few chars
return;
}
String prefix = content.substring(w + 1).toLowerCase();
int n = Collections.binarySearch(words, prefix);
if (n < 0 && -n <= words.size()) {
String match = words.get(-n - 1);
if (match.startsWith(prefix)) {
// A completion is found
String completion = match.substring(pos - w);
// We cannot modify Document from within notification,
// so we submit a task that does the change later
SwingUtilities.invokeLater(
new CompletionTask(completion, pos + 1));
}
} else {
// Nothing found
mode = Mode.INSERT;
}
}
private class CompletionTask implements Runnable {
String completion;
int position;
CompletionTask(String completion, int position) {
this.completion = completion;
this.position = position;
}
public void run() {
textArea.insert(completion, position);
textArea.setCaretPosition(position + completion.length());
textArea.moveCaretPosition(position);
mode = Mode.COMPLETION;
}
}
private class CommitAction extends AbstractAction {
public void actionPerformed(ActionEvent ev) {
if (mode == Mode.COMPLETION) {
int pos = textArea.getSelectionEnd();
textArea.insert(" ", pos);
textArea.setCaretPosition(pos + 1);
mode = Mode.INSERT;
} else {
textArea.replaceSelection("\n");
}
}
}
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
//Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
new TextAreaDemo().setVisible(true);
}
});
}
}
[/highlight]
Das ist so wie bei einem Wörterbuch
Wenn du mehr wörter darein bringen willst,
dann muss die Zahl in der Klammer um den String um eins erhöhen, und dann
word.add
und dann dein neues Wort
viel Spa`ß damit, wenn dus startest, und schreibt s
kommt z.B. "swing" als beispiel
