Pasc+Java 这是一个国外的随机自动机*(RAM)一个学习用的程序

				/**
				 *
				 * @author      Michael Wels
				 * @since       12.06.2002
				 * @version     1.01
				 */
				public class ParserException extends java.lang.Exception {
				
				    // Membervariablen    
				    private Token token;
				    
				    /**
				     * Creates new ParserException without detail message.
				     */
				    public ParserException() {
				    }
				
				    /**
				     * Constructs an ParserException with the specified detail message.
				     * 
				     * @param   msg the detail message.
				     */
				    public ParserException(String msg) {
				        super(msg);
				    }
				    
				    /**
				     * Constructs an ParserException with the specified detail message.
				     * 
				     * @param   msg the detail message.
				     */
				    public ParserException(String msg, Token lastToken) {
				        super(msg);
				        token = lastToken;
				    }
				    
				    /**
				     * Accessormethode für das Token, bei dem der Fehler auftrat.
				     *
				     * @return  Token
				     */
				    public Token getToken() {
				        return token;
				    }
				}