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POHow to properly use a boolean in a method and print result
 

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  1. POHow to properly use a boolean in a method and print result
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    <p>I am working on a program and I am almost finished with it. The only thing I can't figure out is how to as the user for a y or n and then display the boolean in the program to be true or false. It keeps giving me an error. Here is the code that I am working with. I just want it to display true or false when the last print statement in the driver executes. Thank you </p> <pre><code>public class Customer extends Person { protected int customerNum; protected boolean mailingList; protected char answ; public Customer() { super(); // TODO Auto-generated constructor stub } public Customer(String name, String address, double telephone, int customerNum, boolean mailingList) { super(name, address, telephone); this.customerNum = customerNum; this.mailingList = mailingList; } /** * @return the customerNum */ public int getCustomerNum() { return customerNum; } /** * @param customerNum the customerNum to set */ public void setCustomerNum(int customerNum) { this.customerNum = customerNum; } /** * @return the mailingList */ public boolean isMailingList() { return mailingList; } /** * @param mailingList the mailingList to set */ public void setMailingList(boolean mailingList) { try { if(answ == 'y'){ mailingList = true; } else if(answ == 'n') mailingList = false; this.mailingList = mailingList; } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } /* (non-Javadoc) * @see java.lang.Object#toString() */ @Override public String toString() { return "Customer [customerNum=" + customerNum + ", mailingList=" + mailingList + "]"; } </code></pre> <p>And then the driver</p> <pre><code>import java.util.Scanner; public class CustomerDriver extends PreferredCustomer { /** * @param args */ public static void main(String[] args) { Scanner kb = new Scanner(System.in); PreferredCustomer customer1 = new PreferredCustomer(); System.out.println("Enter Customer Name: "); customer1.setName(kb.nextLine()); System.out.println("Enter Customer Address: "); customer1.setAddress(kb.nextLine()); System.out.println("Enter Telephone Number: "); customer1.setTelephone(kb.nextDouble()); System.out.println("Enter the Customer Number: "); customer1.setCustomerNum(kb.nextInt()); System.out.println("Does customer wish to be on mailing list? \n" + "Enter 'y' for yes and 'n' for no: "); customer1.setMailingList(kb.nextBoolean()); System.out.println("Enter amount of Customer's Purchase: "); customer1.setPurchases(kb.nextDouble()); System.out.println("Customer's Discount is as follows: " + customer1.getDiscountLevel() + "\n"); System.out.println("Customers Name: " + customer1.getName() + "\nCustomers Address: " + customer1.getAddress() + "\nCustomers Phone" + customer1.getTelephone() + "\nCustomer Number: " + customer1.getCustomerNum() + "\nMailing List Preferrence: " + customer1.isMailingList() + "\nCustomer's Purchase Amount " + customer1.getPurchases() + "\nCustomers Discount Rate (if any) :" + customer1.getDiscountLevel()); // TODO Auto-generated method stub } </code></pre> <p>}</p>
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    1. COThis is the error I am getting Exception in thread "main" java.util.InputMismatchException at java.util.Scanner.throwFor(Unknown Source) at java.util.Scanner.next(Unknown Source) at java.util.Scanner.nextBoolean(Unknown Source) at CustomerDriver.main(CustomerDriver.java:31)
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    2. COWhy are you try/catching in setMailingList?
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    3. COIm not sure, we just learned exceptions last week. I figured that if the user entered something other than a y or n it would throw an exception.
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