一个简单的文件拷贝程序，求教我错在哪了？
代码如下：
import java.io.*;
import java.util.*;


public class FileCopy
{

public FileCopy(String s,String a)
{
File fs=new File(s);
File fa=new File(a);


/**
读入并拷贝数据
*/

try
{
BufferedInputStream fsIn = new BufferedInputStream(new FileInputStream(fs));

BufferedOutputStream faOut = new BufferedOutputStream(new FileOutputStream(fa));
//以下6行为有问题的代码，我不知道错在哪了？
int i=fsIn.read();
while(i!=-1)
{
faOut.write(i);
i=fsIn.read();
}

fsIn.close();
faOut.close();
}catch(IOException e)
{
System.out.println(e);
}

}

public static void main(String[] args)
{
System.out.println( "Start copy..... ");

long l1=System.currentTimeMillis();
new FileCopy(args[0],args[1]);
long l2=System.currentTimeMillis();
System.out.println( "Finished! ");
System.out.println( "Total Time: "+(l2-l1));
}


}

args[0]为欲拷贝的文件，args[1]为拷贝文件。谢谢！

[解决办法]
这个,代码虽然写的不太好,但是不至于出错,我估计你是输入的参数错了.
改成new FileCopy( "c:/a.txt ", "c:/aaaa.txt ");试试.注意分隔符 "/ "或者 "\\ "
[解决办法]
给你个代码吧，很简单．
这个用字符流复制文件
import java.io.*;
public class WriteFile{
public static void main(String[] args){
try{
BufferedReader in=new BufferedReader(new FileReader(args[0]));
PrintWriter out=new PrintWriter(args[1]);
String s=in.readLine();
while(s!=null)
{
out.println(s);
s=in.readLine();
}
in.close();
out.close();
}catch(IOException e){
System.out.println(e);
}
}
}
下面用字节流复制文件
import java.io.*;
public class CopyFile{
/*public static void copyFile(DataInputStream in,DataOutputStream out) throws IOException{
try{
while(true)
{
out.writeByte(in.readByte());
}
}catch(EOFException eof){
return;
}
}*/
public static void main(String[] args){
try{
DataInputStream in=new DataInputStream(new BufferedInputStream(new FileInputStream(args[0])));
DataOutputStream out=new DataOutputStream(new BufferedOutputStream(new FileOutputStream(args[1])));
//copyFile(in,out);
while(in.available()!=0)
{
out.writeByte(in.readByte());
}
in.close();
out.close();
}catch(IOException e){
System.out.print(e);
}
}
}

[解决办法]
看着不像是有错的样子