problems with math methods

[Roxanne Billings]

Just when I think I am starting to get this stuff . . . I get stuck again. (please help)

I am writing a program that has a user enter their first name, last name, year of birth. Then I am trying to output their age, create a random amount of years in the future, and calculate their future age.

I have most of the beginning working so far. . . but now I am stuck between creating the random array of int years (future years) and calculating that result with a primitive type int.

Here is the code I have so far . . .

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package assignment7_1;

import java.util.Scanner;
/**
 *
 * 
 */
public class Assignment7_1 {

    /**
     * 
     */
    public static void main(String[] args) {
         //Create Scanner
        Scanner input = new Scanner(System.in);

        //Have user enter a string
        System.out.print("Enter your first name: ");
        String firstName = input.nextLine();


        //Have user enter a string
        System.out.print("Enter your last name: ");
        String lastName = input.nextLine();

        //Have user enter year of birth
        System.out.print("Enter year of birth in four digit format: ");
        int birthYear = input.nextInt();

        int verifyLength = verifyLength(birthYear);

        int[] newYear = new int[1];

        for (int i = 0; i < newYear.length; i++){
            newYear[i] = (int) (Math.random() * 50/1)+1;
            System.out.print(newYear[i] + "\n");
        }
        
        randomAge(newYear[], birthYear); 
        /**I KNOW THIS IS WRONG -- 
        THIS IS WHERE I KNEW I WAS STUCK!!!*/

        initials(firstName, lastName);

        String revLast = revLast(lastName);

        String revFirst = revFirst(firstName);

        System.out.println(revFirst + " " + revLast);



    }

    //verify four character year
    public static int verifyLength(int birthYear){
        Integer chkYear = new Integer (birthYear);

        String strYear = chkYear.toString();

        int p = birthYear;
        if (strYear.length() == 4) {
            p = birthYear;
        }
        else{
            System.out.println("Invalid Year Entered");
		}

        return p;
    }

    //reverse last name
    public static String revLast(String lastName){
        StringBuilder stringbuilder = new StringBuilder(lastName);
        stringbuilder.reverse();
        return stringbuilder.toString();

    }

    //reverse last name
    public static String revFirst(String firstName){
        StringBuilder stringbuilder = new StringBuilder(firstName);
        stringbuilder.reverse();
        return stringbuilder.toString();

    }

    //Create user's initials
    public static void initials(String firstName, String lastName){
        char[] firstChar = firstName.toCharArray();

        char[] lastChar = lastName.toCharArray();

        char charF = firstChar[0];

        char charL = lastChar[0];

        System.out.println(charF + ". " + charL + ".");
        
    }

    //Method to calculate projected age
    public static void randomAge(int newYear, int birthYear){
        // Add newYear to 1900; then subtract from birthYear
        int newYear1 = (newYear + 1900);
        
        int newAge = (newYear1 - birthYear);
        
        System.out.println(newAge);
        
        }

   

Thank you in advance for any assistance you can provide me!

RB

[Greg Brannon]

Check for an answer on DIC.

[fred rosenberger]

What do you mean by "create a random amount of years in the future"? this could mean you're trying to find one date some random amount of time in the future, or you could be trying to find a random number of years, all of which are in the future.

Being a good programmer means knowing, understanding, and being able to explain the problem clearly to everyone else. So, let's focus on one small part...what EXACTLY are you trying to create?