throwable.java

一个开源的JAVA虚拟机

/*
    libaegisvm - The Aegis Virtual Machine for executing Java bytecode
    Modifications by Philip W. L. Fong
    Copyright (C) 2001-2002

    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

*/

/*
 *  java.lang.Throwable
 *
 *  (c) 1997 George David Morrison
 *
 *  API version: 1.0.2
 *
 *  History:
 *  01FEB1997  George David Morrison
 *    Initial version
 */

package java.lang;

import aegis.*;
import java.io.*;

public class Throwable implements Serializable {
    /* The Aegis VM assumes the first instance reference field of a
       Throwable object to be an Object[] for storing backtrace. */
    private Object[] stackTrace;
    private String detailMessage;

    public Throwable() {
	this(null);
    }
    public Throwable(String message) {
	detailMessage = message;
	fillInStackTrace();
    }

    public String getMessage() {
	return detailMessage;
    }
    public String getLocalizedMessage() {
	return getMessage();
    }
    public String toString() {
	String s = getClass().getName();
	if (detailMessage != null)
	    s = s + ": " + detailMessage;
	return s;
    }
    public void printStackTrace() {
	printStackTrace(System.err);
    }
    public void printStackTrace(PrintStream s) {
	s.println(this.toString());
	if (stackTrace != null) {
	    for (int i = 0; i < stackTrace.length; i++)
		if (stackTrace != null)
		    s.println("  in " + stackTrace[i].toString());
	} else {
	    s.println("No stack trace available.");
	}
    }
    public void printStackTrace(PrintWriter s) {
	s.println(this.toString());
	if (stackTrace != null) {
	    for (int i = 0; i < stackTrace.length; i++)
		if (stackTrace != null)
		    s.println("  in " + stackTrace[i].toString());
	} else {
	    s.println("No stack trace available.");
	}
    }
    public native Throwable fillInStackTrace();
}