Return stack trace from the passed exception as a string : Exception « Development « Java Tutorial

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/*
 * Copyright (C) 2001-2003 Colin Bell
 * colbell@users.sourceforge.net
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

import java.io.*;
import java.text.NumberFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * General purpose utilities functions.
 *
 * @author <A HREF="mailto:colbell@users.sourceforge.net">Colin Bell</A>
 */
public class Utilities
{


   /**
    * Return the stack trace from the passed exception as a string
    *
    * @param  th  The exception to retrieve stack trace for.
    */
   public static String getStackTrace(Throwable th)
   {
      if (th == null)
      {
         throw new IllegalArgumentException("Throwable == null");
      }

      StringWriter sw = new StringWriter();
      try
      {
         PrintWriter pw = new PrintWriter(sw);
         try
         {
            th.printStackTrace(pw);
            return sw.toString();
         }
         finally
         {
            pw.close();
         }
      }
      finally
      {
         try
         {
            sw.close();
         }
         catch (IOException ex)
         {
           
         }
      }
   }

}