package com.bitmechanic.listlib;import javax.servlet.jsp.PageContext;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.TagSupport;public class HasPrevTag extends ListBaseTag {    public int doStartTag() throws JspException {        ListContainer lc = getList();        if (lc.hasPrev())            return EVAL_BODY_INCLUDE;        else            return SKIP_BODY;    }    }