File Copy using Java I/O

copy.java

/*
 * CSE 2015 - Programming Language II (KMH) 
 * Homework - March 5, 2018  
 */

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

/**
 *
 * @author th3an
 */
public class JavaApplication3 {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        String mainFile = "one.txt";
        String newFile = "two.txt"; 
        
        copyNow(mainFile, newFile);
        
    }

    private static void copyNow(String mainFile, String newFile) throws FileNotFoundException, IOException {
        
        RandomAccessFile data1 = new RandomAccessFile(mainFile, "rw"); 
        RandomAccessFile data2 = new RandomAccessFile(newFile, "rw"); 
        data2.seek(0);
        long length=data1.length(); 
        
        for(int i=0; i<length; i++){
            data2.write(data1.read());
        }
        
        data1.close();
        data2.close();
    }

}