package io;
import java.io.*;
public class CopyFile {
public static void main(String[] args) throws IOException{
File src=new File("properties.txt");
File des=new File("properties.back.txt");
FileInputStream fis=new FileInputStream(src);
FileOutputStream fos=new FileOutputStream(des);
int data;
while((data=fis.read())!=-1){
fos.write(data);
}
fis.close();
fos.close();
}
}