bufferstreamdemo.java

java入门经典教程 java入门经典教程 java入门经典教程

  // 例5.3.4 BufferStreamDemo.java
import java.io.*;
class BufferStreamDemo
{
	public static void main(String[] args) throws IOException
	{
		int data;
	    // 打开缓冲输入流
		BufferedInputStream bIn = new BufferedInputStream(
			new FileInputStream("source.mp3"),8192);
		// 打开缓冲输出流
		BufferedOutputStream bOut = new BufferedOutputStream(
			new FileOutputStream("dest.mp3"),8192);
		// 复制文件
		long start,end;   
	    start = System.currentTimeMillis();
		while ((data = bIn.read())!=-1)
		{
			bOut.write(data);
		}
		bOut.flush();
	    end = System.currentTimeMillis();
		System.out.println("Elapsed time: "+ (end - start));
	}
}