setting a boolean field when being read from a file

[ajw1993]

i need help when i am reading in a file one of the tokens is either "yes" or "no" , i need to set the boolean field to true if it is yes.

and false if it is no. how do i do it ?

this is my code > public void readData(Scanner scanner)
{
group = scanner.next();
vehID = scanner.next();
regNo = scanner.next();
make = scanner.next();
model = scanner.next();
if(scanner.next().equals("yes"))
{
airCon = true; // where i have to change the boolean to true if it is yes
}
engineSize = scanner.nextDouble();
fuelType = scanner.next();
gearbox = scanner.next();
transmission = scanner.next();
mileage = scanner.nextInt();
dateFirstRegistered = scanner.next();
}

[JosAH]

Why not do this instead?

airCon= scanner.next().equals("yes");

kind regards,

Jos

[ajw1993]

changed it , but they are still all false in the array list when im storing it nothing is being changed

[JosAH]

changed it , but they are still all false in the array list when im storing it nothing is being changed

Aren't you curious what was actuually read? You need to be a bit creative: assign what was read to a String variable and System.out.print() it before converting it to a boolean. Seeing what it's actually doing is understandig ...

kind regards,

Jos

[ajw1993]

its reading the yes and no which is what i want , but how do i store that in the boolean field ??

[JosAH]

its reading the yes and no which is what i want , but how do i store that in the boolean field ??

Read my original reply again: airCon= yourStringVariable.equals("yes");

kind regards,

Jos

[ajw1993]

changed it and it keeps saying false . is there anything in the constuctor that i should change

[JosAH]

changed it and it keeps saying false . is there anything in the constuctor that i should change

How should we know? All you showed us is a small code snippet in your original post and it didn't contain any constructors ...

kind regards,

Jos

[ajw1993]

heres the code (all)

import java.util.*;
public class Vehicle
{
    // instance variables - replace the example below with your own
    private String group,vehID, regNo, make,model,fuelType,gearbox,transmission,dateFirstRegistered;
    private boolean airCon;
    private double engineSize;
    private int mileage;
   

    
    /**
     * Constructor for objects of class Vehicle
     */
    public Vehicle()
    {
        // initialise instance variables
         group = null;
         vehID = null;
         regNo = null;
         make = null;
  
         
       
         
    }
    
    public String getGroup()
    {
        return group;
    }
    
    public String getVehicleID()
    {
       return vehID;
   
    }
    
    public String getRegestrationNumber()
    {
        return regNo;
    }
    
    public String getMakeOfVehicle()
    {
        return make;

    }
    
    public void displayDetails()
    {
        System.out.println(make + model  + " Group: " + group + " Vehicle ID: " + vehID);
        System.out.println(" Air Conditioning or Climate Control : " + airCon);
        System.out.println(" Engine Size : " + engineSize  + " Fuel : " + fuelType);
        System.out.println(" Gearbox : " + gearbox + " Transmission : " + transmission);
        System.out.println(" Mileage : " + mileage + " Date First Registered : " + dateFirstRegistered);
        
    
    }
    
    public void readData(Scanner scanner)
    {
        group = scanner.next();
        vehID = scanner.next();
        regNo = scanner.next();
        make = scanner.next();
        model = scanner.next();
        String yes = scanner.next();
         System.out.println(yes);
        engineSize = scanner.nextDouble();
        fuelType = scanner.next();
        gearbox = scanner.next();
        transmission = scanner.next();
        mileage = scanner.nextInt();
        dateFirstRegistered = scanner.next();
    }
}

[JosAH]

In your readData( ... ) method you're not setting your airCon member variable anywhere ...

kind regards,

Jos

[ajw1993]

what like airCon = scanner.next(); or next Boolean

[JosAH]

what like airCon = scanner.next(); or next Boolean

Don't guess; if you'd read the API documentation for the Scanner class you could've read that a String representation of boolean value is "true" or "false"; that's no what you want. Also, read my original reply again; it answers your question (but as usual it is ignored).

kind regards,

Jos

[ajw1993]

thanks ive got it to work , but now i need help on writing a class for testing can you help me ?