大名鼎鼎的java动态脚本语言。已经通过了sun的认证

				package org.codehaus.groovy.syntax;								import org.codehaus.groovy.GroovyException;								import java.io.IOException;								/**				 * Encapsulates non-specific i/o exceptions.				 */								public class ReadException extends GroovyException {				    private IOException cause = null;								    public ReadException(IOException cause) {				        super();				        this.cause = cause;				    }								    public ReadException(String message, IOException cause) {				        super(message);				        this.cause = cause;				    }								    public IOException getIOCause() {				        return this.cause;				    }								    public String toString() {				        String message = super.getMessage();				        if (message == null || message.trim().equals("")) {				            message = cause.getMessage();				        }								        return message;				    }								    public String getMessage() {				        return toString();				    }				}