Java输入输出流 复制文件

   刚开始学习Java,一直想学但总是坚持不下来,回到家就想着玩游戏,看来是要下决心了,2010年要好好学习Java了.
   这是在网上看到的两个小例子,自己也做了一遍.
    1.
    try
{
FileInputStream in=new FileInputStream("C:/1.txt");
FileOutputStream out=new FileOutputStream("C:/2.txt");
byte[] by=new byte[1024];
do {
in.read(by, 0, 1024);
out.write(by);
} while (in.available()>0);
in.close();
out.close();
}catch(ArrayIndexOutOfBoundsException e)
{
e.printStackTrace();
}catch(IOException e)
{
e.printStackTrace();
}
   2.
try {
FileInputStream in=new FileInputStream("C:/1.txt");
FileOutputStream out= new FileOutputStream("C:/2.txt");
BufferedInputStream bufferedIn=new BufferedInputStream(in);
BufferedOutputStream bufferedOut=new BufferedOutputStream(out);
byte[] by=new byte[1];
while (bufferedIn.read(by)!=-1) {
bufferedOut.write(by);
}
//将缓冲区中的数据全部写出
bufferedOut.flush();
bufferedIn.close();
bufferedOut.close();

} catch (ArrayIndexOutOfBoundsException e) {
// TODO: handle exception
e.printStackTrace();
}catch (IOException e) {
// TODO: handle exception
e.printStackTrace();
}