Question

Write a program called Copy that accepts the names of an input file and an output file on the command line and copies the contents of the input file to the output file, for example, csc$ java Copy infile.txt outfile.txt

java

Answer 1

//Copy.java

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.util.Scanner;
public class Copy{
    public static void main(String[] args) throws Exception{
        if(args.length==2) {
            BufferedWriter bw = null;
            FileWriter fw = null;
            Scanner sc = new Scanner(new File(args[0]));
            fw = new FileWriter(args[1]);
            bw = new BufferedWriter(fw);
            while (sc.hasNextDouble()) {
                String temp = sc.nextLine();
                bw.write(temp + "\n");
            }
            bw.close();
            sc.close();
        }
    }
}