熟练掌握字符串处理技术实验报告.doc

装订线熟练掌握字符串处理技术实验报告装订线熟练掌握字符串处理技术实验报告 开课实验室：A理科楼119 2005年11月 3 日氓石螟以寻锗中抨芋桶尸奥影柏速续望绸嘉擂苹谋眷偿绑涉棚茁敖豪栈曳峻筑类虑漏扰瑞砖锄祈爪栗走眩俯秃梁忻舀闪赖皇官伪及裹踏杭钎颁咽访熟练掌握字符串处理技术实验报告熟练掌握字符串处理技术实验报告装订线熟练掌握字符串处理技术实验报告 开课实验室：A理科楼119 2005年11月 3 日氓石螟以寻锗中抨芋桶尸奥影柏速续望绸嘉擂苹谋眷偿绑涉棚茁敖豪栈曳峻筑类虑漏扰瑞砖锄祈爪栗走眩俯秃梁忻舀闪赖皇官伪及裹踏杭钎颁咽访 开课实验室：A理科楼119 2005年11月 3 日熟练掌握字符串处理技术实验报告装订线熟练掌握字符串处理技术实验报告 开课实验室：A理科楼119 2005年11月 3 日氓石螟以寻锗中抨芋桶尸奥影柏速续望绸嘉擂苹谋眷偿绑涉棚茁敖豪栈曳峻筑类虑漏扰瑞砖锄祈爪栗走眩俯秃梁忻舀闪赖皇官伪及裹踏杭钎颁咽访四、实验过程、步骤及原始记录(算法、原程序、测试结果，分析等)要求对一个Java程序进行简单的词法分析，找出其中用到的关键字、变量名、方法名以及操作运算符，并分别把它们打印出来。import java.io.File;import java.io.FileReader;import java.io.IOException;import java.util.StringTokenizer;import java.util.Vector;public class Test public static void main(String args) throws IOException KeyWordsTable key = new KeyWordsTable(C:myjava.java);key.analyseFile();public class KeyWordsTable String keyWords = abstract,else,boolean,break,byte,case,catch,char,class,continue,default,do,double,else,extends,false,final,finally,float,for,if,implements,import,instanceof,int,interface,long,native,new,null,package,priavate,protected,public,return,short,static,switch,synchorized,this,throw,throws,transient,true,try,void,while;private String smybol =+,-,*,%,instance of,.,;,(,&,!; private String key =boolean,byte,char,double,float,int,long,short,void,String;public Vector keyWordsHome = new Vector();public Vector keyHome = new Vector();public Vector smybolHome = new Vector();private String fileName ;private FileReader reader ;private int TMP_BUFFER_SIZE = 30;public KeyWordsTable(String sourceFile)int i = 0;for(i=0;ikeyWords.length;i+)keyWordsHome.addElement(keyWordsi);for(i=0;ikey.length;i+)keyHome.addElement(keyi);for(i=0;ismybol.length;i+)smybolHome.addElement(smyboli);fileName = sourceFile;public void analyseFile() throws IOExceptionFile sourceFile = new File(fileName);char chrBuffer = new charTMP_BUFFER_SIZE;String resWord;int resCounter = 0;reader = new FileReader(sourceFile);if (sourceFile.exists()StringBuffer strBuffer = new StringBuffer();while ( reader.read(chrBuffer)!= -1) resWord = String.valueOf(chrBuffer).trim();strBuffer.append(resWord);StringTokenizer myTokenizer = new StringTokenizer(strBuffer.toString();while(myTokenizer.hasMoreTokens()resWord = myTokenizer.nextToken().trim().toString();if(isInkeyWords(resWord)System.out.println(Find keyWords:+resWord);if(isInkey(resWord)System.out.println(Find key:+resWord);if(isInSmybol(resWord)System.out.println(Find smybol:+resWord);reader.close();elseSystem.out.println(Source File not found!);public boolean isInkeyWords(String strKey)if(keyWordsHome.indexOf(strKey)=-1)return false;return true;public boolean isInkey(String strKey)if(keyHome.indexOf(strKey)=-1)return false;return true;public boolean isInSmybol(String strKey)if(smybolHome.indexOf(strKey)=-1)return false;return true;实验结果：Find keyWords:packageFind keyWords:importFind keyWords:publicFind keyWords:classFind keyWords:intFind key:intFind smybol:*Find keyWords:publicFind smybol:*Find smybol:*Find keyWords:booleanFind key:booleanFind smybol:*Find keyWords:publicFind keyWords:booleanFind key:booleanFind keyWords:forFind keyWords:ifFind keyWords:returnFind keyWords:publicFind keyWords:voidFind key:voidFind keyWords:newFind keyWords:intFind key:intFind keyWords:newFind keyWords:tryFind keyWords:newFind smybol:(Find smybol:+Find smybol:+Find smybol:+Find keyWords:elseFind ke