package com.fxl.test;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

public class TestLoop {

    public static void main(String[] args) {

        List<String> list = new ArrayList();

        for(int i=0;i<10000*100;i++){

            list.add("test"+i);

        }

        test1(list);

        test2(list);

    }

    public static void test1(List<String> list){

        long start = System.currentTimeMillis();

        long num = 0l;

        for(String str : list){

            num += Long.parseLong(str.replace("test", ""));

        }

        System.out.println("result:"+num + "\n use Time:"+(System.currentTimeMillis()-start)/1000);

    }

    public static void test2(List<String> list){

        long start = System.currentTimeMillis();

        long num = 0l;

        /*for(Iterator<String> it=list.iterator(); it.hasNext();){

            num += Long.parseLong(it.next().replace("test", ""));

            it.remove();

        }*/

        Iterator<String> it = list.iterator();

        while (it.hasNext()) {

            String str = it.next();

            num += Long.parseLong(str.replace("test", ""));

            it.remove();

        }

        System.out.println("result:"+num + "\n use Time:"+(System.currentTimeMillis()-start)/1000);

    }

}