Like Regular Expression Demo in a TextField : Basic Regular Expressions « Regular Expressions « Java






Like Regular Expression Demo in a TextField

Like Regular Expression Demo in a TextField
  

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */
import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JTextArea;

/* Like REDemo but shows the groups in a TextField
 */
public class REDemo2 extends REDemo {

  JTextArea logTextArea;
  
  /** "main program" method - construct and show */
  public static void main(String[] av) {
    JFrame f = new JFrame("REDemo2");
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    REDemo2 comp = new REDemo2();
    Container cp = f.getContentPane();
    cp.add(comp, BorderLayout.NORTH);
    cp.add(comp.logTextArea, BorderLayout.SOUTH);
    f.pack();
    f.setVisible(true);
  }

  REDemo2() {
    super();
    logTextArea = new JTextArea(10,40);
    add(logTextArea);
  }

  protected boolean tryMatch() {
    if (pattern == null) {
      return false;
    }
    logTextArea.setText("");
    if (!super.tryMatch()) {
      return false;
    }
    int n = matcher.groupCount();
    matcher.reset(stringTF.getText());
    if (match.isSelected() && matcher.matches()) {
      logTextArea.setText(matcher.group());
      return true;
    }
    if (find.isSelected() && matcher.find()) {
      logTextArea.setText(matcher.group());
      return true;
    }
    if (findAll.isSelected()) {
      int i;
      for (i = 0; i < n; i++) {
        matcher.find();
        logTextArea.append(i + ": " + matcher.group(i) + "\n");
      }
      if (i > 0) {
        return true;
      }
    }
    setMatches(false);
    return false;
  }
}


           
         
    
  








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