在JTextArea中插入字(文本)，从存储的现有文本中，同时输入
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我希望您能帮助我解决我目前正在研究的问题。
有没有一种方法可以将一个字一个字（文本）插入到 JTextArea 从现有的文本存储（如字典），同时在文本区域输入？
应该是用 KeyTyped 或其他技术...
答案
根据 @GuillaumePolet 位于此 SO Post.
我把这段代码稍微修改了一下，这样它就可以从单词列表文件中提取10个特定的单词，并将它们显示在编辑滑块当前位置附近的弹出列表中。你可以打完字或用鼠标从弹出的列表中双击你想要的单词，也可以用光标和回车键来做同样的事情。
你使用的单词列表由你决定。我只是从网上复制了一个由124390个单词组成的。只要提供 dictionaryFilePath 字符串成员变量你要使用的字典文本文件的路径和文件名。这个变量位于 建议面板 内部类。这里是整个可运行的代码。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Point;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.text.Collator;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import javax.swing.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTextArea;
import javax.swing.ListSelectionModel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.text.BadLocationException;
public class WordAssist {
public class SuggestionPanel {
private final JList<String> list;
private final JPopupMenu popupMenu;
private final String subWord;
private final int insertionPosition;
private String dictionaryFilePath = "French_Dictionary.txt";
private int numberOfWordsInList = 10;
private Color colorOfList = Color.decode("#FBFEC3"); // Light-Yellow (default)
private Color colorOfListText = Color.decode("#000000"); // Black (default)
private String listFontName = Font.SANS_SERIF;
private int listFontStyle = Font.PLAIN;
private int listFontSize = 11;
private Font listFont = new Font(listFontName, listFontStyle, listFontSize);
private Locale locale = Locale.FRANCE;
public String characterEncoding = "UTF-8";
public SuggestionPanel(JTextArea textarea, int position, String subWord, Point location) {
this.insertionPosition = position;
this.subWord = subWord;
popupMenu = new JPopupMenu();
popupMenu.removeAll();
popupMenu.setOpaque(false);
popupMenu.setBorder(null);
popupMenu.add(list = createSuggestionList(position, subWord), BorderLayout.CENTER);
popupMenu.show(textarea, location.x, textarea.getBaseline(0, 0) + location.y);
}
public void hide() {
popupMenu.setVisible(false);
if (suggestion == this) {
suggestion = null;
}
}
private JList<String> createSuggestionList(final int position, final String subWord) {
String[] data = searchForWord(dictionaryFilePath, subWord + "*", numberOfWordsInList);
if (data.length == 0) {
data = new String[2];
data[0] = " : Unknown Word : ";
data[1] = "Add To Dictionary";
}
JList<String> assistList = new JList<>(data);
assistList.setFont(new Font(listFontName, listFontStyle, listFontSize));
assistList.setBorder(BorderFactory.createLineBorder(Color.DARK_GRAY, 1));
assistList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
assistList.setBackground(colorOfList);
assistList.setForeground(colorOfListText);
if (data.length == 2 && data[0].equalsIgnoreCase("unknown word:")) {
assistList.setSelectedIndex(1);
}
else {
assistList.setSelectedIndex(0);
}
assistList.addMouseListener(new MouseAdapter() {
@Override
@SuppressWarnings("Convert2Lambda")
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 1 && list.getSelectedValue().equalsIgnoreCase("add to dictionary")) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
addToDictionary(dictionaryFilePath, subWord, characterEncoding, locale);
}
});
hideSuggestion();
textarea.requestFocus();
}
if (e.getClickCount() == 2) {
insertSelection();
hideSuggestion();
textarea.requestFocus();
}
}
});
return assistList;
}
/**
* Adds the supplied word to the supplied Dictionary text file but only
* if it doesn't already exist. The dictionary text file must be
* formated in such a manner that each line of that file must contain
* only one word.
*
* @param dictionaryPath (String) The path and file name to the
* Dictionary text file.<br>
*
* @param wordToAdd (String) The word to add to dictionary.<br>
*
* @param characterEncoding (String) The Character encoding to use for Dictionary:<pre>
*
* Example: "UTF-8"</pre><br>
*
* See:
* <b>https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html</b>
* for all the supported Encodings.<br>
*
* @param locale (Locale) The Locale of the dictionary file.
* This is also important for sorting so that
* it too is done according to the proper locale.<pre>
* Example: Locale.FRANCE or Locale.US;</pre>
*
*/
public void addToDictionary(String dictionaryPath, String wordToAdd, String characterEncoding, Locale locale) {
if (dictionaryPath.trim().equals("") || wordToAdd.trim().equals("")) {
return;
}
wordToAdd = wordToAdd.trim();
String savePath = new File(dictionaryPath).getAbsolutePath();
savePath = savePath.substring(0, savePath.lastIndexOf(File.separator))
+ File.separator + "tmpDictFile.txt";
try (BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(dictionaryPath), characterEncoding))) {
OutputStream os = new FileOutputStream(savePath);
// PrintWriter writer = new PrintWriter(savePath)) {
try (PrintWriter writer = new PrintWriter(new OutputStreamWriter(os, characterEncoding))) {
// PrintWriter writer = new PrintWriter(savePath)) {
String addwordFirstChar = wordToAdd.substring(0, 1);
Collator collator = Collator.getInstance(locale);
collator.setStrength(Collator.PRIMARY);
List<String> wordList = new ArrayList<>();
String line;
while ((line = reader.readLine()) != null) {
line = line.trim();
if (line.equals("")) {
continue;
}
String firstChar = line.substring(0, 1);
if (firstChar.equals(firstChar.toUpperCase())
&& addwordFirstChar.equals(addwordFirstChar.toUpperCase())
&& collator.equals(firstChar, addwordFirstChar)) {
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