如何突出显示JTextArea中的单个单词 [英] How to highlight a single word in a JTextArea

问题描述

我想在文本中读取用户输入，然后突出显示特定单词并将其返回给用户。我能够阅读文本并将其返回给用户，但我无法弄清楚如何突出显示单个字。如何使用java swing突出显示JTextArea中的单个单词？

I want to read in text the user inputs and then highlight a specific word and return it to the user. I am able to read in the text and give it back to the user, but I cant figure out how to highlight a single word. How can I highlight a single word in a JTextArea using java swing?

推荐答案

使用JTextArea附带的DefaultHighlighter。例如，

Use the DefaultHighlighter that comes with your JTextArea. For e.g.,

import java.awt.Color;
import javax.swing.*;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;
import javax.swing.text.Highlighter.HighlightPainter;

public class Foo001 {
   public static void main(String[] args) throws BadLocationException {

      JTextArea textArea = new JTextArea(10, 30);

      String text = "hello world. How are you?";

      textArea.setText(text);

      Highlighter highlighter = textArea.getHighlighter();
      HighlightPainter painter = 
             new DefaultHighlighter.DefaultHighlightPainter(Color.pink);
      int p0 = text.indexOf("world");
      int p1 = p0 + "world".length();
      highlighter.addHighlight(p0, p1, painter );

      JOptionPane.showMessageDialog(null, new JScrollPane(textArea));          
   }
}

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