📄 byylscanner.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<!--NewPage-->
<HTML>
<HEAD>
<!-- Generated by javadoc (build 1.5.0_09) on Fri Mar 16 15:55:25 CST 2007 -->
<TITLE>
ByylScanner
</TITLE>
<META NAME="keywords" CONTENT="byyl.ByylScanner class">
<LINK REL ="stylesheet" TYPE="text/css" HREF="../stylesheet.css" TITLE="Style">
<SCRIPT type="text/javascript">
function windowTitle()
{
parent.document.title="ByylScanner";
}
</SCRIPT>
<NOSCRIPT>
</NOSCRIPT>
</HEAD>
<BODY BGCOLOR="white" onload="windowTitle();">
<!-- ========= START OF TOP NAVBAR ======= -->
<A NAME="navbar_top"><!-- --></A>
<A HREF="#skip-navbar_top" title="跳过导航链接"></A>
<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
<TR>
<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
<A NAME="navbar_top_firstrow"><!-- --></A>
<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
<TR ALIGN="center" VALIGN="top">
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../byyl/package-summary.html"><FONT CLASS="NavBarFont1"><B>软件包</B></FONT></A> </TD>
<TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>类</B></FONT> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>树</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>已过时</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../index-all.html"><FONT CLASS="NavBarFont1"><B>索引</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../help-doc.html"><FONT CLASS="NavBarFont1"><B>帮助</B></FONT></A> </TD>
</TR>
</TABLE>
</TD>
<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
</EM>
</TD>
</TR>
<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
上一个类
<A HREF="../byyl/equ.html" title="byyl 中的类"><B>下一个类</B></A></FONT></TD>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
<A HREF="../index.html?byyl/ByylScanner.html" target="_top"><B>框架</B></A>
<A HREF="ByylScanner.html" target="_top"><B>无框架</B></A>
<SCRIPT type="text/javascript">
<!--
if(window==top) {
document.writeln('<A HREF="../allclasses-noframe.html"><B>所有类</B></A>');
}
//-->
</SCRIPT>
<NOSCRIPT>
<A HREF="../allclasses-noframe.html"><B>所有类</B></A>
</NOSCRIPT>
</FONT></TD>
</TR>
<TR>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
摘要： 嵌套 | <A HREF="#field_summary">字段</A> | <A HREF="#constructor_summary">构造函数</A> | <A HREF="#method_summary">方法</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
详细信息： <A HREF="#field_detail">字段</A> | <A HREF="#constructor_detail">构造函数</A> | <A HREF="#method_detail">方法</A></FONT></TD>
</TR>
</TABLE>
<A NAME="skip-navbar_top"></A>
<!-- ========= END OF TOP NAVBAR ========= -->
<HR>
<!-- ======== START OF CLASS DATA ======== -->
<H2>
<FONT SIZE="-1">
byyl</FONT>
<BR>
类 ByylScanner</H2>
<PRE>
java.lang.Object
<IMG SRC="../resources/inherit.gif" ALT="继承者 "><B>byyl.ByylScanner</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>ByylScanner</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
题目:ByylScanner启动运行类<br>描述:Simple语言编译器。包括词法分析，语法/语义分析.<br> 中间生成的有符号表，token串，修改后的符号表和四元式。<br> 运行时您将见到四个显示区域。用途如下<br> 左上 inputTextArea 用于打开和编写simple语言源程序<br> 右上symbolTableTextArea 用于显示词法分析后的符号表和修改后的符号表<br> 左下resultTextArea 用于显示词法分析和语法语义分析的出错情况<br> 右下tokenTextArea 用于显示token串和生成的四元式
<P>
<P>
<DL>
<DT><B>版本：</B></DT>
<DD>2007.3.13</DD>
<DT><B>作者：</B></DT>
<DD>闫相通(040410206) 哈工大(威海) xiangtongcz@126.com</DD>
</DL>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
<A NAME="field_summary"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>字段摘要</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#addrCount">addrCount</A></B></CODE>
<BR>
符号表的计数器</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#address">address</A></B></CODE>
<BR>
当前token在符号表中的入口地址(序号)</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.lang.StringBuffer</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#alphabet">alphabet</A></B></CODE>
<BR>
字母表</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#beginCode">beginCode</A></B></CODE>
<BR>
用于程序是否正常结束,碰到begin，beginCode加2</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#buffer">buffer</A></B></CODE>
<BR>
读入的文件内容存在byte串中</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private char</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#ch">ch</A></B></CODE>
<BR>
读入的字符</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#charId">charId</A></B></CODE>
<BR>
当前字符在saveText符号串中的位置</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#code">code</A></B></CODE>
<BR>
当前token的种别码</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#columnCount">columnCount</A></B></CODE>
<BR>
列计数器</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.io.File</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#currentFile">currentFile</A></B></CODE>
<BR>
指向当前所处理的文件的指针</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../byyl/Symbol.html" title="byyl 中的类">Symbol</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#currentSymbol">currentSymbol</A></B></CODE>
<BR>
当前符号表</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../byyl/Token.html" title="byyl 中的类">Token</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#currentToken">currentToken</A></B></CODE>
<BR>
当前token串</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#endCode">endCode</A></B></CODE>
<BR>
碰到end后，endCode加一，碰到;或.再加一</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../byyl/equ.html" title="byyl 中的类">equ</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#Equ">Equ</A></B></CODE>
<BR>
存放四元式的数组</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#EQU_LEN">EQU_LEN</A></B></CODE>
<BR>
堆栈Equ[]的大小</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#error_count">error_count</A></B></CODE>
<BR>
语法/语义分析时错误计数器</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#errorCount">errorCount</A></B></CODE>
<BR>
词法分析时错误计数器</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#EXP_LEN">EXP_LEN</A></B></CODE>
<BR>
堆栈expr[]的大小</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../byyl/stack.html" title="byyl 中的类">stack</A>[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#expr">expr</A></B></CODE>
<BR>
存放运算表达式和布尔表达式</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#falseAddress">falseAddress</A></B></CODE>
<BR>
存放假出口地址</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#falseLine">falseLine</A></B></CODE>
<BR>
假出口地址数组中即将生成的下一个出口的序号</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.awt.FileDialog</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#fileChooser">fileChooser</A></B></CODE>
<BR>
打开文件时弹出对话框以选择文件</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#fileFlag">fileFlag</A></B></CODE>
<BR>
fileFlag=0表示可以直接关闭程序<br>fileFlag=1表示原文件已经被修改，但未保存,点击保存则直接保存，点击打开则直接保存后再打开,点击关闭则保存后再关闭<br>fileFlag=2表示新建的文件，要弹出对话框给出文件名。</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.awt.FileDialog</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#fileSaver">fileSaver</A></B></CODE>
<BR>
打开文件时弹出对话框以选择文件</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.io.FileInputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#fis">fis</A></B></CODE>
<BR>
将文件内容显示在输入区时所用的输入流</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.io.FileOutputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#fos">fos</A></B></CODE>
<BR>
将输入区内容保存到文件时所用的输出流</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.awt.Frame</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#frame">frame</A></B></CODE>
<BR>
显示的窗体</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.lang.StringBuffer</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#ID">ID</A></B></CODE>
<BR>
存放当前token对应的字符串或数字</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.awt.TextArea</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#inputTextArea">inputTextArea</A></B></CODE>
<BR>
显示程序的输入区</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#isChange">isChange</A></B></CODE>
<BR>
用于判断简单的复赋值语句（变量:= 数值）是否修改符号表<br>嵌套在其它语句（如 if 语句）中的简单赋值语句不修改符号表,用isChange=0表示<br>不嵌套在其它语句的简单赋值语句需要修改符号表，用isChange=1表示</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#isFor">isFor</A></B></CODE>
<BR>
isFor=1表示是嵌套在for语句中的</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.lang.StringBuffer[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#keyWord">keyWord</A></B></CODE>
<BR>
存放关键字的数组</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#labelCount">labelCount</A></B></CODE>
<BR>
token的计数器</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#len">len</A></B></CODE>
<BR>
读入文件的长度</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#LENGTH">LENGTH</A></B></CODE>
<BR>
保留字的个数</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#lineOfEqu">lineOfEqu</A></B></CODE>
<BR>
下一个将要生成的四元式的序号</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../byyl/ByylScanner.html#lineOfPro">lineOfPro</A></B></CODE>
<BR>
语法/语义分析时的行计数器</TD>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -