JOptionPane.showMessageDialog截断JTextArea消息 [英] JOptionPane.showMessageDialog truncates JTextArea message

问题描述

我的Java GUI应用程序需要快速向最终用户显示一些文本，因此JOptionPane实用程序方法似乎很合适.而且，文本必须是可选择的(用于复制和粘贴)，并且可能会有些长(〜100个单词)，因此它必须很好地适合窗口(屏幕外没有文本)；理想情况下，所有这些都应该一次显示，以便用户无需交互即可阅读它，因此滚动条是不可取的.

My Java GUI application needs to quickly show some text to the end-user, so the JOptionPane utility methods seem like a good fit. Moreover, the text must be selectable (for copy-and-paste) and it could be somewhat long (~100 words) so it must fit nicely into the window (no text off screen); ideally it should all be displayed at once so the user can read it without needing to interact, so scrollbars are undesirable.

我认为将文本放入JTextArea并将其用于JOptionPane.showMessageDialog中的消息会很容易，但似乎会截断文本！

I thought putting the text into a JTextArea and using that for the message in JOptionPane.showMessageDialog would be easy but it appears to truncate the text!

public static void main(String[] args) {
  JTextArea textArea = new JTextArea();
  textArea.setText(getText()); // A string of ~100 words "Lorem ipsum...\nFin."
  textArea.setColumns(50);
  textArea.setOpaque(false);
  textArea.setEditable(false);
  textArea.setLineWrap(true);
  textArea.setWrapStyleWord(true);
  JOptionPane.showMessageDialog(null, textArea, "Truncated!", JOptionPane.WARNING_MESSAGE);
}

如何使文本完全适合选项窗格而没有滚动条，并且可以选择复制/粘贴?

How can I get the text to fit entirely into the option pane without scrollbars and selectable for copy/paste?

推荐答案

import java.awt.*;
import javax.swing.*;

public class TextAreaPreferredHeight2
{
 public static void main(String[] args)
 {
  String text = "one two three four five six seven eight nine ten ";
  JTextArea textArea = new JTextArea(text);
  textArea.setColumns(30);
  textArea.setLineWrap( true );
  textArea.setWrapStyleWord( true );
  textArea.append(text);
  textArea.append(text);
  textArea.append(text);
  textArea.append(text);
  textArea.append(text);
  textArea.setSize(textArea.getPreferredSize().width, 1);
  JOptionPane.showMessageDialog(
   null, textArea, "Not Truncated!", JOptionPane.WARNING_MESSAGE);
 }
}

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