Thread: Reading from a text file into an ArrayList

For the following problem, I have created the passenger class and have created the ArrayList in the Train Class. I do not know how to read the passengers from a text file into the ArrayList. And I also do not understand how to do the other methods. Help would be greatly appreciated.

Train Class

import java.util.ArrayList;
public class Train
{
    private ArrayList<Passenger> train;
 
    public Train()
    {
        train = new ArrayList<Passenger>();
    }
}

Passenger Class

public class Passenger
{
    private int serviceClass;
    private String name;
 
    public Passenger(int sC, String n)
    {
        setServiceClass(sC);
        setName(n);
    }
 
    public void setServiceClass(int sC)
    {
        if(sC == 1 || sC == 2)
            serviceClass = sC;
        else
            System.out.println("Error");
    }
 
    public void setName(String n)
    {
        name = n;
    }
 
    public String getName()
    {
        return name;
    }
 
    public int getServiceClass()
    {
        return serviceClass;
    }
}

Design and code a program including the following classes, as well as a client class to test all the methods coded:

A Passenger class, encapsulating a passenger. A passenger has two attributes: a name, and a class of service, which will be 1 or 2.

A Train class, encapsulating a train of passengers. A train of passengers has one attribute: a list of passengers, which must be represented with an ArrayList. Your constructor will build the list of passengers by reading date from a file called passengers.txt (that you would create). You can assume that passengers.txt has the following format:
<name1> <class1>
<name2> <class2>
….

For instance, the file could contain:

James 1
Ben 2
Suri 1
Sarah 1
Jane 2
…..
You should include the following methods in your Train class:
A method returning the percentage of passengers traveling in the first class
A method taking two parameters representing the price of traveling in first and second class and returning the total revenue for the train.
A method checking if a certain person is on the train; if he/she is, the method returns true; otherwise, it returns false.

Originally Posted by Spanky_10

I do not know how to read the passengers from a text file into the ArrayList.

Read the file line by line and add the passengers to the list as you go.

Originally Posted by Spanky_10

And I also do not understand how to do the other methods.
A method returning the percentage of passengers traveling in the first class
A method taking two parameters representing the price of traveling in first and second class and returning the total revenue for the train.
A method checking if a certain person is on the train; if he/she is, the method returns true; otherwise, it returns false.

The first two require collecting the required values and doing some math. Figure out how to solve these on paper before you write the code.
For the last one you will need to decide how to check the list to see if a specific name is on the list.