Highlight of discontinous string : JTextArea « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTextArea

import javax.swing.JTextArea;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;

public class Main {

  public static void main(String args[]) {
    JTextArea area = new JTextArea(5, 20);
    area.setText("this is a test.");
    String charsToHighlight = "aeiouAEIOU";
    Highlighter h = area.getHighlighter();
    h.removeAllHighlights();
    String text = area.getText().toUpperCase();
    for (int i = 0; i < text.length(); i += 1) {
      char ch = text.charAt(i);
      if (charsToHighlight.indexOf(ch) >= 0)
        try {
          h.addHighlight(i, i + 1, DefaultHighlighter.DefaultPainter);
        } catch (Exception ble) {
        }
    }
  }
}

14.16.JTextArea
	14.16.1.	JTextArea: for multiple-line input.
	14.16.2.	Setting JTextArea Line Wrap and Wrap Style
	14.16.3.	Using JTextArea
	14.16.4.	Set font for I18N to JTextArea
	14.16.5.	Hello in Japanese
	14.16.6.	Using Actions with Text Components: JTextArea
	14.16.7.	Copy selected text from one text area to another
	14.16.8.	Modifying Text in a JTextArea Component
	14.16.9.	Insert some text after the 5th character
	14.16.10.	Append some text to JTextArea
	14.16.11.	Replace the first 3 characters with some text
	14.16.12.	Delete the first 5 characters
	14.16.13.	Enumerating the Lines in a JTextArea Component
	14.16.14.	Setting the Tab Size of a JTextArea Component
	14.16.15.	Moving the Focus with the TAB Key in a JTextArea Component
	14.16.16.	Customizing a JTextArea Look and Feel
	14.16.17.	Highlight of discontinous string
	14.16.18.	Setting text drag in a JTextArea
	14.16.19.	Enumerate the content elements with a ElementIterator