Thread: car rental (project)

Do you have any specific questions about your project?
What have you tried?

Be sure to wrap all posted code in code tags.

The questions you posted look like what the program would ask the user. It appears to be an exact copy of the first post.

I was asking you for what java programming questions you have about how to design and write the program.

Is the program supposed to have a GUI window with input fields, display areas and buttons
or will it use a command prompt to get user input and display results?

If it uses the command prompt window, you can use the println method to display output on the console
and the Scanner class's next... methods to read user input.

Before writing any code you should make a list of the steps the program needs to take to solve the problem.

Before worrying about what classes and methods to use you need to make a design for the program.
Once you have a list of the steps then worry about how to implement those steps.

wondering how to add either filewriter or reader

Which step in the program's design are you working on?
A writer and a reader are for different purposes.
One outputs some data like to ask a user a question
the other reads some data like to get the user's input.

stuck with the "what kind of car to rent"

Can you explain what needs to be done for that?

Please edit your post and wrap your code with code tags:

[code]
**YOUR CODE GOES HERE**
[/code]

to get highlighting and preserve formatting.

Note: program statements should be indented to show nesting level
There should not be more than } on a line. Each } should be in the same column as the start of the statement that has the pairing }

what kind of data type should i use for "what kind of car to rent?

What are the choices for "kind of car"?
Can you use a String for each kind
or a digit/letter (1 for 2-seater, 2 for truck, 3 for 4-door, etc)?

now im stuck with how to give each number (up to 4) a vaule like 1 = 500

[code]import java.util.Scanner;

public class gg
{
public static void main(String[] args)
{

Scanner input = new Scanner(System.in);

int carNumber = 0;
int daysNumber = 0;

System.out.print("Enter the Number of car: ");

carNumber = input.nextInt();

System.out.print("Enter the Number of Days: ");

daysNumber = input.nextInt();

double totalRentalCharge = 0.0;

totalRentalCharge = daysNumber;

System.out.println("Total Rental Charge is: " + totalRentalCharge);
}
}
{/code]

--- Update ---

now im stuck with how to give each number (up to 4) a vaule like 1 = 500

import java.util.Scanner; 
 
public class gg
{
public static void main(String[] args) 
{
 
Scanner input = new Scanner(System.in);
 
int carNumber = 0;
int daysNumber = 0;
 
System.out.print("Enter the Number of car: ");
 
carNumber = input.nextInt();
 
System.out.print("Enter the Number of Days: ");
 
daysNumber = input.nextInt();
 
double totalRentalCharge = 0.0;
 
totalRentalCharge = daysNumber;
 
System.out.println("Total Rental Charge is: " + totalRentalCharge);
}
}

The posted code has lost all its indentations. Statements should not all start in column 1.
indent the statements to show there logical nesting.
Inside class - indent 3
inside method indent 3 - now indented 3+3 = 6
There should never be a } immediately above another }. The top one should be indented.

how to give each number (up to 4) a vaule like 1 = 500

Where are the "numbers' coming from? What data type are they? int, char or String?
One way to get values for user's input would be with a switch statement.

   switch(userInput) {
      case "1":
         value  = 500;
         break;

Notice the statements' indentations.

where should i put the switch statement or between what line should i put it in

Put it after where you have obtained the user's input
and before where you need the value associated with the user's input.

what do i need to do so that when i put 5 or more in the "number of car" it will say that " that is not a valid car, pls try again"

Scanner input = new Scanner(System.in);
 
int carNumber = 0;
int daysNumber = 0;
 
System.out.print("Enter the Number of car: ");
 
carNumber = input.nextInt();
 
System.out.print("Enter the Number of Days: ");
 
daysNumber = input.nextInt();
 
switch(carNumber) {
    case 1:
    carNumber = 500;
    case 2:
    carNumber = 600;
    case 3:
    carNumber = 700;
    case 4:
    carNumber = 800;
    break;
}
 
double totalRentalCharge = 0.0;
totalRentalCharge = daysNumber;
 
System.out.println("Total Rental Charge is: " + totalRentalCharge);
}
}

which part do i need to correct on my switch case

Please explain why you think there is a problem.

Have you read the tutorial about switch statements: https://docs.oracle.com/javase/tutor...ts/switch.html



Note: The posted code still does not have proper indentations. Please fix it.

Use an if statement to test if the number is valid.
What should the code do if it displays a message that says: "pls try again"?

should i put the if statement after the switch statement

Back to doing some design work BEFORE writing any code.

What steps does the program need to take to solve the problem?
Make a list first and check that the steps will work.
Then start at the top of the list and write the code for each step.
Some steps will take more sub-steps to solve what they are supposed to do.

Post the steps for the design of this program
and then ask your question about how to implement that step.

Ok, those are java statements.

What design do you have for what the program should do? The steps in a design are not java statements.
They would be short phrases describing what the code would do.
For example
Prompt user for type of fruit
Read user's response
test response is valid
if not valid display a message and loop back to the prompt
...