java利用线程池优化程序

//v2.0新增利用线程创建，发现加载更快了
    {
        // 获取当前程序运行时对象
        Runtime run = Runtime.getRuntime();
        // 调用垃圾回收机制，以减少内存误差
        run.gc();
        // 获取当前JVM的空闲内存
        long freeMemory = run.freeMemory();
        // 系统当前时间
        long timePro = System.currentTimeMillis();
        ExecutorService service = Executors.newFixedThreadPool(2);
        // 线程池创建并执行1000个线程
        for (int i = 0; i < 1000; i++) {
            try {
                service.submit(new ReadConfigFile());
                
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

        System.out.println("使用线程池创建1000个线程所需要占用的内存大小: "
                + (freeMemory - run.freeMemory()));
        // 线程池使用完成，关闭线程池
        service.shutdown();
        System.out.println("使用线程池创建并运行1000个线程需要的时间为: "
                + (System.currentTimeMillis() - timePro));

    
    }//线程池结束

package com.writer;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.concurrent.Callable;

//读取配置文件的类
public class ReadConfigFile implements Callable {
    File file = null;
    FileInputStream fis = null;
     BufferedInputStream bis = null;
    public ReadConfigFile() throws IOException{
        this.file  = new File("C:/menu.txt");
        this.fis = new FileInputStream(file);
        this.bis = new BufferedInputStream(fis);
    }
    
    public String[] getFileContent(){    
        try{
            long begin = System.currentTimeMillis();
             byte[] buffer = new byte[1024];
             String []result = null;
             int cnt = 0;
             while((cnt=bis.read(buffer)) != -1) {
                 String bluck = new String(buffer, 0, cnt);
                 result = bluck.split("\r\n");//在windows中回车换行必须这样写
                 System.err.print(result[1]);
                }
                System.out.println("=====BufferIStream===== time: " + (System.currentTimeMillis() - begin) + "ms");
            return result;
        }catch(Exception e){
            System.err.print(e);
            return null;
        }finally{
            close();
        }        
    }
    public void close(){
        try {
            bis.close();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }


    public Object call() throws Exception {
        // TODO Auto-generated method stub
        return this;
    }
    //测试
    public static void main(String[] args) throws IOException {
        ReadConfigFile txt = new ReadConfigFile();
        String a[] = txt.getFileContent();
        for (int i=0;i<a.length;i++) {
            if(i%2!=0)
            System.out.print(a[i]);
        }

    }
}