西安邮电大学编译基础原理词法分析 

^`

if (str.charAt(++i) == '=')

list.add(OperatorTable.db.get(\ else if (str.charAt(i) == '<')

list.add(OperatorTable.db.get(\ else {

list.add(OperatorTable.db.get(\ i--; }

break; case '&':

if (str.charAt(++i) == '&')

list.add(OperatorTable.db.get(\ else {

list.add(OperatorTable.db.get(\ i--; }

break; case '~':

list.add(OperatorTable.db.get(\ break; case '|':

if (str.charAt(++i) == '|')

list.add(OperatorTable.db.get(\ else {

list.add(OperatorTable.db.get(\ i--; }

break; case '^':

list.add(OperatorTable.db.get(\ break; default: break; } } } }

return list; }

public static void main(String[] args) {

File file = new File(\ try {

Scanner scanner = new Scanner(file);

Analyst analyst = new Analyst(scanner.getStringBuffer().toString()); List list = analyst.analysis(); for (WordType wt : list) { System.out.println(wt); }

} catch (IOException e) { e.printStackTrace(); }

^`

} }

Scanner.java

package com.zc.ca.exec;

import java.io.BufferedReader; import java.io.File;

import java.io.FileInputStream; import java.io.IOException;

import java.io.InputStreamReader; import java.io.Reader; public class Scanner {

private StringBuffer sb = new StringBuffer(); public Scanner(File file) throws IOException {

FileInputStream fis = new FileInputStream(file); init(fis); }

private void init(FileInputStream fis) throws IOException { Reader reader = new InputStreamReader(fis); BufferedReader br = new BufferedReader(reader); String line = null;

while ((line = br.readLine())!=null) { sb.append(line); } }

public StringBuffer getStringBuffer(){ return sb; }}