Question

Exercise 1 — Input information then write to a file

Write an application that will have someone input any number of friends' phone data and write the data to a file.

File Details

The output file should be named "friend1.txt" The data in the files will be last name, first name, age and phone number, each piece of data on a separate line, such as:

Smith

Pete
15

888-1234

Jones

Sue

17

885-4578

Use parallel arrays to create this information before writing the output file.

Please help code this in Java.

Answer 1

package Oct2_2020;

import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.Scanner;

public class WriteToFile {
        public static void main(String[] args) throws Exception{
                Scanner sc = new Scanner(System.in);
                System.out.print("Enter number of friends: ");
                int n = sc.nextInt();
                String firstNames[] = new String[n];
                String lastNames[] = new String[n];
                int ages[]=new int[n];
                String phones [] = new String[n];
                PrintWriter pw = new PrintWriter(new FileWriter("frind1.txt"));
                for(int i=0;i<n;i++) {
                        System.out.println("Enter lastName: ");
                        lastNames[i]=sc.next();
                        System.out.print("Enter firstName: ");
                        firstNames[i]=sc.next();
                        System.out.print("Enter age: ");
                        ages[i]=sc.nextInt();
                        System.out.println("Enter phone: ");
                        phones[i]=sc.next(); 
                }
                for(int i=0;i<n;i++) {
                        pw.println(lastNames[i]);
                        pw.println(firstNames[i]);
                        pw.println(ages[i]);
                        pw.println(phones[i]);
                }
                pw.close();
        }
}

frind 1.txt X 1 Smith 2 pete 3 15 4 888-1234 5 Jones 6 Sue 7 17 8885-4578 9

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