// implement the C-lang binary 'cp' in Java

// (slightly different version, based on the documentation from Oracle)

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

class CopyFile2 {

public static void main(String[] args) {

if (args.length != 2) {

System.out.println("Wrong number of arguments.");

System.out.println("Usage: CopyFile <file_in> <file_out>");

return;

}

// character placeholder

int c;

try(FileInputStream aFileIn = new FileInputStream(args[0]);

FileOutputStream aFileOut = new FileOutputStream(args[1])) {

// not 'do...while'!

while ((c = aFileIn.read()) != -1)

aFileOut.write(c);

} catch (IOException aExc) {

System.out.println("I/O Error: " + aExc);

aExc.printStackTrace();

}

}

}