黑马程序员——IO流复制文件

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从c盘读取一个txt文件复制到d盘

import java.io.*;

class CopyFile

{

public static void main(String [] args)

{

copy();

}

public static void copy()

{

FileWriter fw = null;

FileReader fr = null;

try{

fw = new FileWriter("d:\\panlong.txt");

fr = new FileReader("c:\\panlong.txt");

char[] buf = new char[1000];

int len = 0;

while((len=fr.read(buf))!=-1)

{

fw.write(buf,0,len);

}

}

catch(IOException)

{

System.out.println("file error");

}

finally

if(fr!=null)

try

{

fr.close();

}

catch(IOException)

{

}

if(fw!=null)

try

{

fw.close();

}

catch(IOException)

{

}

}

}