import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;


public class Test02 {

public static void main(String[] args) throws IOException {
Test02 t02 = new Test02();
t02.Test();

}

public void Test() throws IOException {
FileInputStream fs =null;
FileOutputStream fo =null;
File f =new File("G:\\demo\\a.txt");
File f1 =new File("G:\\demo\\b.txt"); 
f1.createNewFile();   //建立一個新的檔案；
try {  

fs = new FileInputStream(f);
fo = new FileOutputStream(f1);
byte[] b =new byte[100];
fs.read(b);  //在f中寫入一些字元並且用輸入流讀取，
String s = new String(b);
System.out.println(s);
fo.write(b, 0, b.length); //再利用輸出流寫入到另一個檔案內部；注意轉換
 
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
if (fs !=null) {
try {
fs.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}



}
}