在与构造GUI分开的单独线程中创建DefaultStyledDocument似乎是创建巨大文本区域的最快方法。DefaultStyledDocument是线程安全的。
这是我用来测试DefaultStyledDocument的代码。我用空格创建了文本，以便换行的Swing代码有机会工作。
package com.ggl.testing;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
public class HugeTextArea implements Runnable {
private DefaultStyledDocument document;
private JFrame frame;
private JTextArea textArea;
public HugeTextArea() {
this.document = new DefaultStyledDocument();
Runnable runnable = new Runnable() {
@Override
public void run() {
buildLongString(400000);
}
};
new Thread(runnable).start();
}
@Override
public void run() {
frame = new JFrame();
frame.setTitle("Huge Text");
frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
textArea = new JTextArea(document);
textArea.setLineWrap(true);
frame.add(new JScrollPane(textArea));
frame.setSize(400, 350);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private void buildLongString(int length) {
Random random = new Random();
String[] chars = { "s", "t", "a", "y", " " };
for (int i = 0; i < length; i++) {
try {
document.insertString(document.getLength(),
chars[random.nextInt(chars.length)],
null);
} catch (BadLocationException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
SwingUtilities.invokelater(new HugeTextArea());
}
}
602392714
清零编程群