Vehicle-Taxi Program

[xdeath]

Hi guys, at the moment, im rushing to get my assignment done as the dateline is soon. Haven't had much time lately, so i'm in need of some help.

Im supposed to create a program that :
Has a Vehicle superclass, and a Taxi subclass.

1) Can accept new Taxi into an array
2) Can delete old records of Taxi from the array
3) Have to be able to retain the previous added data (which i think most likely im gonna do it by saving and reading the data from the array into a txt file of which im still wondering how)
4) Able to sort the records
5) Able to show the average price.

What i've done so far is this :
Just to test out if my 2dimensional array is working fine, but apparently i get an error when i compile.

Any help is appreciated.

import java.io.*;
import java.util.Scanner;
 
public class Vehicle2 {
    private static Scanner scan = new Scanner(System.in);
 
    public static void main(String[] args) {
 
        CarList theCarList = new CarList();
        char selection = 'x';
        while (selection != 'q') 
        {
        clearScreen();
         System.out.println("\n  ---------------------------------------------------------------------");
         System.out.println("                ***     VEHICLE REGISTRY - MAIN MENU     ***");
         System.out.println("  ---------------------------------------------------------------------\n");
         System.out.println();
         System.out.println("  Type : ");
         System.out.println("    a  -  To insert a new taxi into the vehicle registry");
         System.out.println("    d  -  To delete a taxi from the vehicle registry");
         System.out.println("    q  -  To quit the program\n");
         System.out.print(" Please make a selection: ");
         selection = scan.next().charAt(0);
         scan.nextLine();
 
         switch (selection) {
         case 'a': addATaxi(theCarList);
                break;
         }
        }
 
        private static void addATaxi(CarList theCarList) {
            String[][] taxiData = new String[5][5];
            double [][] taxiData2 = new double[5][2];
 
            double taxiPrice = 0.0;
            double taxiSpeed = 0.0;
            clearScreen();
            System.out.println("\n ---------------------------------------------------------------------");
            System.out.println("                 ***    VEHICLE REGISTRY - ADD A TAXI     ***");
            System.out.println("  ---------------------------------------------------------------------\n");
 
            taxiData[0][0] = inputValidString("Vehicle Plate Number");
            taxiData[0][1] = inputValidString("Vehicle Brand Name");
            taxiData[0][2] = inputValidString("Vehicle Model");
            taxiData[0][3] = inputValidString("Taxi Registration Number");
            taxiData[0][4] = inputValidString("Taxi Company Name");
 
            try {
                System.out.println("Please Enter the vehicle price :");
                taxiData2[0][0] = scan.nextDouble();
            }
            catch (Exception e)
            {
            System.out.println("Invalid Value Entered ");
            System.out.println("No New Vehicle was Added");
            return;
            }
 
            try {
                System.out.println("Please Enter the vehicle speed :");
                taxiData2[0][1] = scan.nextDouble();
            }
            catch (Exception e)
            {
            System.out.println("Invalid Value Entered ");
            System.out.println("No New Vehicle was Added");
            return;
            }
 
            System.out.print("Number Plate\tBrand Name\tModel Type\tTaxi Reg. No.\tTaxi Company\n\tV. Price\tV. Speed");
            for(int i=0;i<1;i++) {
                for(int j=0;j<5;j++) {
                    System.out.print(taxiData[i][j]+"\t\t");
                }
                for (k=0;k<1;k++) {
                    System.out.print(taxiData2[i][k]+"\t\t");
                }
               //move to new line
               System.out.print("\n");
            }
            pressReturn();
        }
 
        public static boolean validateString(String token) {
            if(token.length()>0 && token.length() <=12)
                return true;
            else 
                return false;
        }
 
        public  static String inputString(String name) {
            while (true) {
                System.out.println("Enter the "+name);
                String store = scan.nextLine();
                if(validateString(store)) {
                    return store;
                }
                System.out.println("Invalid or Long "+name+"  choose a valid "+name);
            }
        }
}
 

[r035198x]

Hi guys, at the moment, im rushing to get my assignment done as the dateline is soon. Haven't had much time lately, so i'm in need of some help.

Im supposed to create a program that :
Has a Vehicle superclass, and a Taxi subclass.

1) Can accept new Taxi into an array
2) Can delete old records of Taxi from the array
3) Have to be able to retain the previous added data (which i think most likely im gonna do it by saving and reading the data from the array into a txt file of which im still wondering how)
4) Able to sort the records
5) Able to show the average price.

What i've done so far is this :
Just to test out if my 2dimensional array is working fine, but apparently i get an error when i compile.

Any help is appreciated.

import java.io.*;
import java.util.Scanner;
 
public class Vehicle2 {
    private static Scanner scan = new Scanner(System.in);
 
    public static void main(String[] args) {
 
        CarList theCarList = new CarList();
        char selection = 'x';
        while (selection != 'q') 
        {
        clearScreen();
System.out.println("\n ---------------------------------------------------------------------");
System.out.println(" *** VEHICLE REGISTRY - MAIN MENU ***");
System.out.println(" ---------------------------------------------------------------------\n");
System.out.println();
         System.out.println(" Type : ");
         System.out.println(" a - To insert a new taxi into the vehicle registry");
         System.out.println(" d - To delete a taxi from the vehicle registry");
         System.out.println(" q - To quit the program\n");
         System.out.print(" Please make a selection: ");
         selection = scan.next().charAt(0);
         scan.nextLine();
 
         switch (selection) {
         case 'a': addATaxi(theCarList);
                break;
         }
        }
 
        private static void addATaxi(CarList theCarList) {
            String[][] taxiData = new String[5][5];
            double [][] taxiData2 = new double[5][2];
 
            double taxiPrice = 0.0;
            double taxiSpeed = 0.0;
            clearScreen();
            System.out.println("\n ---------------------------------------------------------------------");
            System.out.println(" *** VEHICLE REGISTRY - ADD A TAXI ***");
            System.out.println(" ---------------------------------------------------------------------\n");
 
            taxiData[0][0] = inputValidString("Vehicle Plate Number");
            taxiData[0][1] = inputValidString("Vehicle Brand Name");
            taxiData[0][2] = inputValidString("Vehicle Model");
            taxiData[0][3] = inputValidString("Taxi Registration Number");
            taxiData[0][4] = inputValidString("Taxi Company Name");
 
            try {
                System.out.println("Please Enter the vehicle price :");
                taxiData2[0][0] = scan.nextDouble();
            }
            catch (Exception e)
            {
            System.out.println("Invalid Value Entered ");
            System.out.println("No New Vehicle was Added");
            return;
            }
 
            try {
                System.out.println("Please Enter the vehicle speed :");
                taxiData2[0][1] = scan.nextDouble();
            }
            catch (Exception e)
            {
            System.out.println("Invalid Value Entered ");
            System.out.println("No New Vehicle was Added");
            return;
            }
 
            System.out.print("Number Plate\tBrand Name\tModel Type\tTaxi Reg. No.\tTaxi Company\n\tV. Price\tV. Speed");
            for(int i=0;i<1;i++) {
                for(int j=0;j<5;j++) {
                    System.out.print(taxiData[i][j]+"\t\t");
                }
                for (k=0;k<1;k++) {
                    System.out.print(taxiData2[i][k]+"\t\t");
                }
             //move to new line
             System.out.print("\n");
            }
            pressReturn();
        }
 
        public static boolean validateString(String token) {
            if(token.length()>0 && token.length() <=12)
                return true;
            else 
                return false;
        }
 
        public static String inputString(String name) {
            while (true) {
                System.out.println("Enter the "+name);
                String store = scan.nextLine();
                if(validateString(store)) {
                    return store;
                }
                System.out.println("Invalid or Long "+name+" choose a valid "+name);
            }
        }
}
 

1.)You did not specify that error that you got.
2.)You don't have to post all your code for this. Just the bits where you need specific help with.
3.)Did you write the Vehicle and Taxi classes correctly(You don't have to post them)?

[xdeath]

1.)You did not specify that error that you got.
2.)You don't have to post all your code for this. Just the bits where you need specific help with.
3.)Did you write the Vehicle and Taxi classes correctly(You don't have to post them)?

Error that i got is : Vehicle2.java:32: illegal start of expression
private static void addATaxi(CarList theCarList) {
^
1 error.

Uh, in this one, i dont think vehicle and taxi classes are even used yet? im just testing out if the main menu + receive input for the addTaxi method is working properly...

[r035198x]

Error that i got is : Vehicle2.java:32: illegal start of expression
private static void addATaxi(CarList theCarList) {
^
1 error.

Uh, in this one, i dont think vehicle and taxi classes are even used yet? im just testing out if the main menu + receive input for the addTaxi method is working properly...

You cannot test anything before you write the Vehicle and Taxi classes. Write those first. You will need to be creating instances of Taxis in the test class and you cannot do that before you write the Taxi class.

[xdeath]

You cannot test anything before you write the Vehicle and Taxi classes. Write those first. You will need to be creating instances of Taxis in the test class and you cannot do that before you write the Taxi class.

hmm okay... uh im not very good at java so yea, correct me if anything's amiss..

 
public class Vehicle {
    private String plateNum;
    private String brandName;
    private String modelType;
    private double vehicleSpeed;
    private double vehiclePrice;
 
    public void setPlateNum(String plateNum) {
        this.plateNum = plateNum;
    }
 
    public void setBrandName(String brandName) {
        this.brandName = brandName;
    }
 
    public void setModelType(String modelType) {
        this.modelType = modelType;
    }
 
    public void setVehicleSpeed(double vehicleSpeed) {
        this.vehicleSpeed = vehicleSpeed;
    }
 
    public void setVehiclePrice(double vehiclePrice) {
        vehiclePrice = vehiclePrice;
    }
 
    public String getPlateNum() {
        return this.plateNum;
    }
 
    public String getBrandName() {
        return this.brandName;
    }
 
    public String getModelType() {
        return this.modelType;
    }
 
    public double getVehicleSpeed() {
        return this.vehicleSpeed;
    }
 
    public double getVehiclePrice() {
        return this.vehiclePrice;
    }
}
 
 
public class Taxi extends Vehicle {
    private String tRegNum;
    private String tCompany;
 
    public void setTRegNum(String tRegNum) {
        this.tRegNum = tRegNum;
    }
 
    public void setTCompany(String tCompany) {
        this.tCompany = tCompany;
    }
 
    public String getTRegNum() {
        return this.tRegNum;
    }
 
    public String getTCompany() {
        return this.tCompany;
    }
}
 

[sicarie]

hmm okay... uh im not very good at java so yea, correct me if anything's amiss..

 
public class Vehicle {
    private String plateNum;
    private String brandName;
    private String modelType;
    private double vehicleSpeed;
    private double vehiclePrice;
 
    public void setPlateNum(String plateNum) {
        this.plateNum = plateNum;
    }
 
    public void setBrandName(String brandName) {
        this.brandName = brandName;
    }
 
    public void setModelType(String modelType) {
        this.modelType = modelType;
    }
 
    public void setVehicleSpeed(double vehicleSpeed) {
        this.vehicleSpeed = vehicleSpeed;
    }
 
    public void setVehiclePrice(double vehiclePrice) {
        vehiclePrice = vehiclePrice;
    }
 
    public String getPlateNum() {
        return this.plateNum;
    }
 
    public String getBrandName() {
        return this.brandName;
    }
 
    public String getModelType() {
        return this.modelType;
    }
 
    public double getVehicleSpeed() {
        return this.vehicleSpeed;
    }
 
    public double getVehiclePrice() {
        return this.vehiclePrice;
    }
}
 
 
public class Taxi extends Vehicle {
    private String tRegNum;
    private String tCompany;
 
    public void setTRegNum(String tRegNum) {
        this.tRegNum = tRegNum;
    }
 
    public void setTCompany(String tCompany) {
        this.tCompany = tCompany;
    }
 
    public String getTRegNum() {
        return this.tRegNum;
    }
 
    public String getTCompany() {
        return this.tCompany;
    }
}
 

Other than a constructor by which to instantiate (create) your objects, I think you're on the right track.

[r035198x]

hmm okay... uh im not very good at java so yea, correct me if anything's amiss..

 
public class Vehicle {
    private String plateNum;
    private String brandName;
    private String modelType;
    private double vehicleSpeed;
    private double vehiclePrice;
 
    public void setPlateNum(String plateNum) {
        this.plateNum = plateNum;
    }
 
    public void setBrandName(String brandName) {
        this.brandName = brandName;
    }
 
    public void setModelType(String modelType) {
        this.modelType = modelType;
    }
 
    public void setVehicleSpeed(double vehicleSpeed) {
        this.vehicleSpeed = vehicleSpeed;
    }
 
    public void setVehiclePrice(double vehiclePrice) {
        vehiclePrice = vehiclePrice;
    }
 
    public String getPlateNum() {
        return this.plateNum;
    }
 
    public String getBrandName() {
        return this.brandName;
    }
 
    public String getModelType() {
        return this.modelType;
    }
 
    public double getVehicleSpeed() {
        return this.vehicleSpeed;
    }
 
    public double getVehiclePrice() {
        return this.vehiclePrice;
    }
}
 
 
public class Taxi extends Vehicle {
    private String tRegNum;
    private String tCompany;
 
    public void setTRegNum(String tRegNum) {
        this.tRegNum = tRegNum;
    }
 
    public void setTCompany(String tCompany) {
        this.tCompany = tCompany;
    }
 
    public String getTRegNum() {
        return this.tRegNum;
    }
 
    public String getTCompany() {
        return this.tCompany;
    }
}
 

1.)You don't have to post all your code.
2.)You need to put at least two constructors for each of these classes for creating the objects with. One should be the default (no-arg cnstructor and one should take the required arguments necessary to create meaningful objects with these classes)
3.)You need to be able to compare these objects with each other so you need to implement the Comparable interface and add the compareTo method.