基础入门：提取C++库函数的代码

 package edu.kevin.regular;

import java.io.*;
import java.util.*;
import java.util.regex.*;

public class SrcAnalyze ...{

    private String srcDir;

    private HashSet allAPI;

    private HashSet inAPI;

    private Pattern pt;

    public SrcAnalyze(String dir) ...{
        srcDir = dir;
        allAPI = new HashSet(1000);
        inAPI = new HashSet(1000);
        //抽取C++的库函数调用
        pt = Pattern.compile(\"(\\b+)(\\w+)\\([^\\)]*\\)(\\s*(\\{)|[^\\{])\");
    }

    public void extract() ...{

        Date start = new Date();
        long startTime = start.getTime();

        extDir(srcDir);

        for (Object hs : inAPI) ...{
            if (allAPI.contains(hs)) ...{
                allAPI.remove(hs);
            }
        }

        Date end = new Date();
        long endTime = end.getTime();
        //计算程序运行时间
        System.out.println(\"Time: \" + (endTime - startTime) + \"ms\");
    }