Cfrgtkky

I have a text file with names, phone numbers, and employee ID's.

Example:

Chris Cotton

5555555555

CCOTTON



Joshua Trammell

5555555555

JTRAMMELL

And I have a class called Employee with a constructor that takes Name, Phone number, and ID.

How can I use that text file to instantiate the employee class for each record in my text file, using the employee id as the object name?

package com.evolution.model;



public class Employee {

    private String name;

    private int phoneNumber;

    private String employeeId;



    public Employee(String name, int phoneNumber, String employeeId) {

        this.name = name;

        this.phoneNumber = phoneNumber;

        this.employeeId = employeeId;

    }

You can read the file line by line, and can maintain three consecutive lines in an array and the moment you capture three lines, you can construct the employee Object using its constructor the way I have shown in my main method.

Here is a sample code you can use. Just to be safe, I have changed data type for phoneNumber from int to String because a phone number may or may not contain only numbers. But if you are sure that your phone numbers will only contain digits that too not starting with zeroes, you can write Integer.parseInt(fileLines.get(i + 1)) instead of just fileLines.get(i + 1) in the constructor creation call in for loop.

Here is a sample code for same,

public class Employee {

    private String name;

    private String phoneNumber;

    private String employeeId;



    public Employee(String name, String phoneNumber, String employeeId) {

        this.name = name;

        this.phoneNumber = phoneNumber;

        this.employeeId = employeeId;

    }



    public String toString() {

        return String.format("name: %s, phoneNumber: %s, employeeId: %s",

                new Object { name, phoneNumber, employeeId });

    }



    public static void main(String args) throws Exception {

        try (BufferedReader reader = new BufferedReader(new FileReader("emp.txt"));) {

            String line = null;



            int counter = 0;

            String lineObject = new String[3];

            while ((line = reader.readLine()) != null) {

                line = line.trim();

                if (line.length() == 0) {

                    continue;

                }

                lineObject[counter++] = line;

                if (counter == 3) {

                    counter = 0;

                    Employee employee = new Employee(lineObject[0], lineObject[1], lineObject[2]);

                    System.out.println(employee);

                    // employee.dowhatever();

                }

            }

        }

    }

}

When executed, this program prints following output,

name: Chris Cotton, phoneNumber: 5555555555, employeeId: CCOTTON

name: Joshua Trammell, phoneNumber: 5555555555, employeeId: JTRAMMELL