Question

Develop an Algorithm and java program using Design Recipe:

1) Develop a java program to the content of one file to another. Hint 1: read() Hint 2: write()

2) Develop a java program to List all files in a given directory. Hint: list()

Answer 1

1.

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class FileCopyExample {

public static void main(String[] args) {

try {

FileReader fr = new FileReader("input.txt");

BufferedReader br = new BufferedReader(fr);

FileWriter fw = new FileWriter("output.txt", true);

String s;

while ((s = br.readLine()) != null) { // read a line

fw.write(s); // write to output file

fw.flush();

}

br.close();

fw.close();

System.out.println("file copied");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

2.

import java.io.File;

class Main {

public static void main(String[] args) {

// creates a file object

File file = new File("C:\\Users\\Guest User\\Desktop\\Java File\\List Method");

// returns an array of all files

String[] fileList = file.list();

for(String str : fileList) {

System.out.println(str);

}

}

}