timetracker.java

以前做的一个j2ee的项目

package gov.gdlt.ssgly.taxcore.comm.util;

import java.util.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: 广东地税税收管理员工作平台</p>
 *
 * <p>Copyright: Copyright (c) 2005 广东省地方税务局，广州市地方税务局</p>
 *
 * <p>Company: 广州地税</p>
 *
 * @author 张承华
 * @version 1.0
 */
public class TimeTracker {


    public class TrackRecord {

        public String trackDesc;
        public long trackTime;
        public TrackRecord(String desc, long time) {
            this.trackDesc=desc;
            this.trackTime=time;
        }

    }

    //to track time in application
    private Vector v = null;
    private boolean isValid = false;

    public TimeTracker(boolean p_isValid) {
        this.isValid=p_isValid;
        if (isValid)    v = new Vector();
    }

    public void track(String desc){
        if(isValid)        v.add(new TrackRecord(desc,Calendar.getInstance().getTimeInMillis()));
    }

    public long sum(){
        if(isValid){
            long all_time = 0;
            TrackRecord lastRecord=null;
            TrackRecord thisRecord=null;


            int vSize=v.size();
            //if track point less than 2, return 0;
            if(vSize<2) return 0;

            all_time=((TrackRecord)v.get(vSize-1)).trackTime-((TrackRecord)v.get(0)).trackTime;

            lastRecord=(TrackRecord)v.get(0);

            for(int i=1;i<v.size();i++){
                thisRecord=(TrackRecord)v.get(i);
                System.out.println("Time from: "+thisRecord.trackDesc+" to:"+lastRecord.trackDesc+" is:"+
                                 (thisRecord.trackTime-lastRecord.trackTime));
                lastRecord=thisRecord;
            }

            System.out.println("All time is:"+all_time);
            return all_time;
        }else{
            return 0;
        }

    }

    public static void main(String[] args) {
        TimeTracker timetracker = new TimeTracker(true);
        timetracker.track("aa");
        timetracker.track("bb");
        timetracker.track("cc");

        timetracker.sum();
    }




}