第四篇学习笔记

import java.io.*;


public class CopyFile {

	/**
	 * @param args
	 */
	public static void copy(File a,File b){
		try {
			FileInputStream fis = new FileInputStream("a.mp3");
			FileOutputStream fos = new FileOutputStream("temp.mp3");
			byte[] buf = new byte[330217];
			int length;
			int read = fis.read();
			while((length = fis.read(buf))!=-1){
				fos.write(buf, 0, length);
			//
			}
			fis.close();
			fos.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	 public static void main(String[] args) {
		// TODO Auto-generated method stub
		File a = new File("");
		File b = new File("");
		long start,end;
		start = System.currentTimeMillis();
		copy(a,b);
		end = System.currentTimeMillis();
		System.out.println("用时：" + (end - start) + "ms");
	//
	}
}