Regression Calculator 1.0.1

import java.util.Scanner;
/**
 * Calculates regression when given TPE count
 *
 * @author BigKicks
 * @version 1.0.0 3/6/2020
 * @version 1.0.1 3/12/2020
 */
public class TPECalculator
{
    public static void main(String[] args)
    {
        //Variables & objects
        int tpe = -1;
        int year = -1;
        String getInput;
        boolean allCorrect = false;
        int addTPE;
        int menuPick;
        Scanner get = new Scanner(System.in);
        do
        {
            //Print menu
            System.out.println("BigKicks's TPE Calculator\n");
            System.out.println("Type \"1\" to calculate 1 year of regression.");
            System.out.println("Type \"2\" to calculate multiple years WITHOUT added TPE per year.");
            System.out.println("Type \"3\" to calculate multiple years WITH added TPE per year.");
            System.out.println("Type \"Quit\" at any time to end this program.");
            getInput = get.next();
            //Menu select error trap
            do
            {
                while(!isNumber(getInput))
                {
                    System.out.println("Invalid selection. Please try again.");
                    getInput = get.next();
                }
                menuPick = Integer.parseInt(getInput);
                if(menuPick>3||menuPick<1)
                {
                    System.out.println("Invalid selection. Please try again.");
                    getInput = get.next();
                }
                if (isNumber(getInput)&&(menuPick<4&&menuPick>0))
                    allCorrect = true;
            }while(allCorrect!=true);
            allCorrect = false;
            //Execute menu choice
            if(menuPick == 1)
            {
                do
                {
                    tpe = tpeTrap(getInput, get, tpe, allCorrect);
                    year = yearTrap(getInput, get, year, allCorrect);
                    if (year<8) //Unregressed
                    {
                        if (year == 0)
                        {
                            System.out.println("DSFL\t\t"+tpe+" TPE");
                        }
                        else
                            System.out.println("Season "+year+"\t"+tpe+" TPE");
                    }
                    else //Regressed
                    {
                        tpe = (int)(tpe * getRegression(year));
                        if (tpe < 150)
                        {
                            System.out.println("Your player has been auto-retired after season "+year+" with "+tpe+" TPE.");
                            year = 16;
                        }
                        else
                        {
                            System.out.println("Season "+year+"\t"+tpe+" TPE");
                        }
                    }
                    getInput = runTrap(getInput, get);
                }while(!getInput.equalsIgnoreCase("n"));
            }
            else if (menuPick == 2)
            {
                do
                {
                    tpe = tpeTrap(getInput, get, tpe, allCorrect);
                    year = yearTrap(getInput, get, year, allCorrect);
                    //Print DSFL year
                    if (year==0)
                    {
                        System.out.println("DSFL\t\t"+tpe+" TPE");
                        year++;
                    }
                    //Print seasons
                    while (year<16)
                    {
                        if (year<8) //Unregressed
                        {
                            if (year == 0)
                            {
                                System.out.println("DSFL\t\t"+tpe+" TPE");
                                year++;
                            }
                            else
                            {
                                System.out.println("Season "+year+"\t"+tpe+" TPE");
                                year++;
                            }
                        }
                        else //Regressed
                        {
                            tpe = (int)(tpe * getRegression(year));
                            if (tpe < 150)
                            {
                                System.out.println("Your player has been auto-retired after season "+(year-1)+" with "+tpe+" TPE.");
                                year = 16;
                            }
                            else
                            {
                                System.out.println("Season "+year+"\t"+tpe+" TPE");
                                year++;
                            }
                        }
                        allCorrect = false;
                    }
                    getInput = runTrap(getInput, get);
                }while(!getInput.equalsIgnoreCase("n"));
            }
            else
            {
                do
                {
                    tpe = tpeTrap(getInput, get, tpe, allCorrect);
                    year = yearTrap(getInput, get, year, allCorrect);
                    //Print DSFL year
                    if (year==0)
                    {
                        System.out.println("DSFL\t\t"+tpe+" TPE");
                        year++;
                    }
                    //Print seasons
                    while (year<16)
                    {
                        System.out.print("Add TPE: ");
                        getInput = get.next();
                        do
                        {
                            while(!isNumber(getInput))
                            {
                                System.out.println("Invalid value. Please try again.");
                                getInput = get.next();
                            }
                            addTPE = Integer.parseInt(getInput);
                            if(addTPE<0)
                            {
                                System.out.println("Invalid TPE amount. Please try again.");
                                getInput = get.next();
                            }
                            if (isNumber(getInput)&&addTPE>=0)
                                allCorrect = true;
                        }while(allCorrect!=true);
                        if (year<8) //Unregressed
                        {
                            System.out.println("Season "+year+" BEFORE added TPE\t"+tpe+" TPE");
                            tpe+=addTPE;
                            System.out.println("Season "+year+" AFTER added TPE\t"+tpe+" TPE ("+addTPE+" added)");
                            year++;
                        }
                        else //Regressed
                        {
                            tpe = (int)(tpe * getRegression(year));
                            if (tpe < 150)
                            {
                                System.out.println("Your player has been auto-retired after season "+(year-1)+" with "+tpe+" TPE.");
                                year = 16;
                            }
                            else
                            {
                                System.out.println("Season "+year+" BEFORE added TPE\t"+tpe);
                                tpe+=addTPE;
                                System.out.println("Season "+year+" AFTER added TPE\t"+tpe+" TPE ("+addTPE+" added)");
                                year++;
                            }
                        }
                        addTPE = 0;
                        allCorrect = false;
                    }
                    getInput = runTrap(getInput, get);
                }while(!getInput.equalsIgnoreCase("n"));
            }
            System.out.println("Would you like return to the menu? (y/n)");
            getInput = get.next();
            while(!getInput.equalsIgnoreCase("y")&&!getInput.equalsIgnoreCase("n"))
            {
                if (getInput.equalsIgnoreCase("Quit"))
                    System. exit(0);
                System.out.println("Invalid value. Please try again.");
                getInput = get.next();
            }
        }while(!getInput.equalsIgnoreCase("n"));
    }

    private static double getRegression(int year)
    {
        switch (year)
        {
            case (8): return .8;
            case (9): return .75;
            case (10): return .7;
            case (11): return .6;
            case (12): return .5;
            case (13): return .4;
            case (14): return .25;
            case (15): return .25;
            default: throw new IllegalArgumentException();
        }
    }

    private static boolean isNumber(String input)
    {
        if (input.equalsIgnoreCase("Quit"))
            System. exit(0);
        try
        {
            Integer.parseInt(input);
        }
        catch(NumberFormatException ex)
        {
            return false;
        }
        return true;
    }

    private static int tpeTrap(String getInput, Scanner get, int tpe, boolean allCorrect)
    {
        //Prompt user for TPE
        System.out.print("Enter TPE: ");
        getInput = get.next();
        //Error trap in case user entered a non-number or invalid number
        do
        {
            while(!isNumber(getInput))
            {
                System.out.println("Invalid value. Please try again.");
                getInput = get.next();
            }
            tpe = Integer.parseInt(getInput);
            if(tpe<50)
            {
                System.out.println("Invalid TPE amount. Please try again.");
                getInput = get.next();
            }
            if (isNumber(getInput)&&tpe>50)
                allCorrect = true;
        }while(allCorrect!=true);
        return tpe;
    }

    private static int yearTrap(String getInput, Scanner get, int year, boolean allCorrect)
    {
        //Prompt user for year
        System.out.print("Enter season (if you're a rookie DSFL player, enter 0): ");
        getInput = get.next();
        //Error trap in case user entered a non-number or invalid number
        do
        {
            while(!isNumber(getInput))
            {
                System.out.println("Invalid value. Please try again.");
                getInput = get.next();
            }
            year = Integer.parseInt(getInput);
            if(year>15||year<0)
            {
                System.out.println("Invalid year. Please try again.");
                getInput = get.next();
            }
            if (isNumber(getInput)&&year<15&&year>=0)
                allCorrect = true;
        }while(allCorrect!=true);
        return year;
    }

    private static String runTrap(String getInput, Scanner get)
    {
        System.out.println("Would you like to run this program again? (y/n)");
        getInput = get.next();
        while(!getInput.equalsIgnoreCase("y")&&!getInput.equalsIgnoreCase("n"))
        {
            if (getInput.equalsIgnoreCase("Quit"))
                System. exit(0);
            System.out.println("Invalid value. Please try again.");
            getInput = get.next();
        }
        return getInput;
    }
}