프로세스 사이 시간 재는 코드 예제(CurrentTimeMills)

package io3;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.OutputStream;

public class FileCopyBuffer {

public static void main(String[] args)throws Exception {

long start = System.currentTimeMillis();

InputStream in = 

new FileInputStream("C:\\zzz\\sample.pdf");

OutputStream out=

new FileOutputStream("C:\\zzz\\copySample.pdf");

byte[] buffer = new byte[1024*8];

while(true){

int count = in.read(buffer);

//System.out.println(count);

if(count == -1){

break;

}

out.write(buffer,0,count);

}

long end = System.currentTimeMillis();

System.out.println(end - start);

}

}