So I have to come up with a code that calculates depreciation using double diminishing method.
So far I got this code:
Scanner kbd = new Scanner (System.in);
System.out.println("Please enter asset number: ");
assetNum = kbd.nextInt();
System.out.println("Please enter initial purchase price: ");
purchPrice = kbd.nextDouble();
System.out.println("Please enter useful life of the asset (in years): ");
usefulLife = kbd.nextDouble();
System.out.println("Please enter the salvage value: ");
salvageVal = kbd.nextDouble();
System.out.println("Please enter the number of years of depreciation: ");
numYears = kbd.nextDouble();
ddRate = ((1.0 / usefulLife) * 2) * 100;
System.out.println("Asset No: " + assetNum);
System.out.printf("Initial Purchase Price: $%,.0f%n" , purchPrice);
System.out.printf("Useful Life: %.0f years%n" , usefulLife);
System.out.printf("Salvage Value: $%,.0f%n" , salvageVal);
System.out.printf("Double Declining Rate: %.0f%%%n" , ddRate);
System.out.printf("Number of Years: %.0f years%n" , numYears);
System.out.println();
System.out.println("Year Yearly Accumulated Book");
System.out.println(" Depreciation Depreciation Value");
System.out.println();
int year;
double yearlyDepr;
double accDepr;
double bookVal;
bookVal = purchPrice;
accDepr = 0;
year = 0;
while (bookVal >= salvageVal){
yearlyDepr = bookVal * (ddRate / 100);
accDepr = accDepr + yearlyDepr;
bookVal = bookVal - yearlyDepr;
year++;
System.out.printf("%d %,18.0f %,18.0f %,18.0f%n" , year, yearlyDepr, accDepr, bookVal);
}
}
}
The output looks good until the last row with a book value of 7,776 instead of the salvage value of 10,000.
Mines like this:
http://puu.sh/zyGzg/e35ccf0722.png
Should be like this:
http://puu.sh/zyGBM/4b6b8fa14c.png
Please help, I'm really stuck.
In your while loop you need to test if the new bookVal will be less than salvageVal and if so use the salvageVal
while (bookVal > salvageVal){ // also change
yearlyDepr = bookVal * (ddRate / 100);
accDepr = accDepr + yearlyDepr;
bookVal = bookVal - yearlyDepr;
year++;
if (bookVal < salvageVal) {
bookVal = salvageVal;
yearlyDepr = purchPrice - salvageVal;
}
System.out.printf("%d %,18.0f %,18.0f %,18.0f%n" , year, yearlyDepr, accDepr, bookVal);
}
Related
I am working on a program for an assignment.
There I got stuck on how to add the days and months for my program.
I can already convert the simple interest into years, but not for months and days:
import java.util.Scanner;
public class SimpleInterest {
public static void main(String[] args) {
double PAmount, ROI, TimePeriod, simpleInterset;
Scanner scanner = new Scanner(System.in);
System.out.print(" Please Enter the Principal Amount : ");
PAmount = scanner.nextDouble();
System.out.print(" Please Enter the Rate Of Interest : ");
ROI = scanner.nextDouble();
System.out.print(" Please Enter the Time Period in Years : ");
TimePeriod = scanner.nextDouble();
simpleInterset = (PAmount * ROI * TimePeriod) / 100;
System.out.println("\n The Simple Interest for Principal Amount " + PAmount + " is = " +
simpleInterset);
}
}
Just ask them separatly then compute the global time
System.out.print(" Please Enter the Principal Amount : ");
double pAmount = Double.parseDouble(scanner.nextLine());
System.out.print(" Please Enter the Rate Of Interest : ");
double rOI = Double.parseDouble(scanner.nextLine());
System.out.print(" Please Enter the Time Period in Years : ");
double years = Double.parseDouble(scanner.nextLine());
System.out.print("And months : ");
double months = Double.parseDouble(scanner.nextLine());
System.out.print("And days");
double days = Double.parseDouble(scanner.nextLine());
double timePeriod = years * months / 12 + days / 365;
double simpleInterset = (pAmount * rOI * timePeriod) / 100;
System.out.println("\n The Simple Interest for Principal Amount " + pAmount + " is = " + simpleInterset);
I'd suggest :
don't define variable before using it if you don't need to do so
use nextLine and parse what you need, you'll avoid suprise with return char
as Java convention, use lowerCamelCase to name your variables
I am a bit confused, I have a little program I wrote for a school assignment, the constraints I am required to work with is that no method can contain more than 15 lines of code, and we cannot use any for next loops.
What I cant seem to figure out is why I am able to pass an integer to my rounding method and it even returns the rounded value, but then it jumps back to my if / then statements (which it shouldnt be doing) and does not pass the variable.
It is a very rudimentary program I know...my coding skills are not very good, but any help would be appreciated.
The variables I need passed back are testscore and GPA, those need to go back to the main method so they can be stored to new variables and finally pushed off into the results method.
Im still pretty new to coding and the community and how things work...
import java.util.*;
public class Admit {
public static void main(String[] Args) {
Scanner console = new Scanner(System.in);
Introduction();
double testscore = 0;
double GPA = 0;
int Student = 1;
ACTSATScores(1,0,console);
double StudentOneTestScore = testscore;
GPAInfo(0,console);
double StudentOneGPAScore = GPA;
Student = 2;
ACTSATScores(2,0,console);
double StudentTwoTestScore = testscore;
GPAInfo(0,console);
double StudentTwoGPAScore = GPA;
DisplayResults(StudentOneTestScore,StudentOneGPAScore,StudentTwoTestScore,StudentTwoGPAScore);
}
public static void Introduction() {
System.out.println("This program compares two applicants to");
System.out.println("determine which one seems like the stronger");
System.out.println("applicant. For each candidate I will need");
System.out.println("either SAT or ACT scores plus a weighted GPA.");
System.out.println();
}
public static double ACTSATScores(int Student,double testscore,Scanner console) {
System.out.println("Information for applicant #" + Student + ":");
System.out.print("do you have 1) SAT scores or 2) ACT scores? ");
int ACTSAT = console.nextInt();
if ( ACTSAT == 1) {
SAT(Student,testscore,console);
}
if ( ACTSAT == 2) {
ACT(Student,testscore,console);
}
return testscore;
}
public static double SAT(int Student,double testscore,Scanner console) {
System.out.print("SAT math? ");
int SATMath = console.nextInt();
System.out.print("SAT critical reading? ");
int SATReading = console.nextInt();
System.out.print("SAT writing? ");
int SATWriting = console.nextInt();
testscore = ( ( 2 * SATMath + SATReading + SATWriting ) / 32);
System.out.println("exam score = " + roundNumber(testscore));
return ( ( 2 * SATMath + SATReading + SATWriting ) / 32);
}
public static double ACT(int Student,double testscore,Scanner console) {
System.out.print("ACT English? ");
int ACTEnglish = console.nextInt();
System.out.print("ACT math? ");
int ACTMath = console.nextInt();
System.out.print("ACT reading? ");
int ACTReading = console.nextInt();
System.out.print("ACT science? ");
int ACTScience = console.nextInt();
testscore = ( ( 2 * ACTMath + ACTEnglish + ACTReading + ACTScience ) / 1.8 );
System.out.println("exam score = " + roundNumber(testscore));
return testscore;
}
public static double GPAInfo(double GPA,Scanner console) {
System.out.print("overall GPA? ");
double OverallGPA = console.nextDouble();
System.out.print("max GPA? ");
double MaxGPA = console.nextDouble();
System.out.print("Transcript Multiplier? ");
double TranscriptMultiplier = console.nextDouble();
GPA = ( OverallGPA / MaxGPA * 100 * TranscriptMultiplier );
System.out.println("GPA score = " + roundNumber(GPA));
return GPA;
}
public static double roundNumber(double number) {
return (Math.round(number * 10)) / 10.0;
}
public static double DisplayResults(double StudentOneTestScore, double StudentOneGPAScore, double StudentTwoTestScore, double StudentTwoGPAScore) {
System.out.println("First applicant overall score = " + StudentOneTestScore + StudentOneGPAScore);
System.out.println("Second applicant overall score = " + StudentTwoTestScore + StudentTwoGPAScore);
if ( StudentOneTestScore + StudentOneGPAScore > StudentTwoTestScore + StudentTwoGPAScore ) {
System.out.println("The first applicant seems to be better");
}
else if ( StudentOneTestScore + StudentOneGPAScore < StudentTwoTestScore + StudentTwoGPAScore ) {
System.out.println("The second applicant seems to be better");
}
else {
System.out.println("The two applicants seem to be equal");
}
return StudentOneTestScore;
}
}
Expected output:
This program compares two applicants to
determine which one seems like the stronger
applicant. For each candidate I will need
either SAT or ACT scores plus a weighted GPA.
Information for applicant #1:
do you have 1) SAT scores or 2) ACT scores? 1
SAT math? 450
SAT critical reading? 530
SAT writing? 490
exam score = 60.0
overall GPA? 3.4
max GPA? 4.0
Transcript Multiplier? 0.9
GPA score = 76.5
Information for applicant #2:
do you have 1) SAT scores or 2) ACT scores? 2
ACT English? 25
ACT math? 20
ACT reading? 18
ACT science? 15
exam score = 54.4
overall GPA? 3.3
max GPA? 4.0
Transcript Multiplier? 0.95
GPA score = 78.4
First applicant overall score = 136.5
Second applicant overall score = 132.8
The first applicant seems to be better
My output
This program compares two applicants to
determine which one seems like the stronger
applicant. For each candidate I will need
either SAT or ACT scores plus a weighted GPA.
Information for applicant #1:
do you have 1) SAT scores or 2) ACT scores? 1
SAT math? 450
SAT critical reading? 530
SAT writing? 490
exam score = 60.0
overall GPA? 3.4
max GPA? 4.0
Transcript Multiplier? 0.9
GPA score = 76.5
Information for applicant #2:
do you have 1) SAT scores or 2) ACT scores? 2
ACT English? 25
ACT math? 20
ACT reading? 18
ACT science? 15
exam score = 54.4
overall GPA? 3.3
max GPA? 4.0
Transcript Multiplier? 0.95
GPA score = 78.4
First applicant overall score = 0.00.0
Second applicant overall score = 0.00.0
The two applicants seem to be equal
Corrected Code for anyone that needs it
import java.util.*;
public class Admit {
public static void main(String[] Args) {
Scanner console = new Scanner(System.in);
Introduction();
int Student = 1;
double StudentOneTestScore = ACTSATScores(1,console);
double StudentOneGPAScore = GPAInfo(0,console);
Student = 2;
double StudentTwoTestScore = ACTSATScores(1,console);
double StudentTwoGPAScore = GPAInfo(0,console);
DisplayResults(StudentOneTestScore,StudentOneGPAScore,StudentTwoTestScore,StudentTwoGPAScore);
}
public static void Introduction() {
System.out.println("This program compares two applicants to");
System.out.println("determine which one seems like the stronger");
System.out.println("applicant. For each candidate I will need");
System.out.println("either SAT or ACT scores plus a weighted GPA.");
System.out.println();
}
public static double ACTSATScores(int Student,Scanner console) {
double testscore = 0;
System.out.println("Information for applicant #" + Student + ":");
System.out.print(" do you have 1) SAT scores or 2) ACT scores? ");
int ACTSAT = console.nextInt();
if ( ACTSAT == 1) {
testscore = SAT(console);
}
if ( ACTSAT == 2) {
testscore = ACT(console);
}
return testscore;
}
public static double SAT(Scanner console) {
System.out.print(" SAT math? ");
int SATMath = console.nextInt();
System.out.print(" SAT critical reading? ");
int SATReading = console.nextInt();
System.out.print(" SAT writing? ");
int SATWriting = console.nextInt();
double testscore = ( ( 2 * SATMath + SATReading + SATWriting ) / 32);
System.out.println(" exam score = " + roundNumber(testscore));
return testscore;
}
public static double ACT(Scanner console) {
System.out.print(" ACT English? ");
int ACTEnglish = console.nextInt();
System.out.print(" ACT math? ");
int ACTMath = console.nextInt();
System.out.print(" ACT reading? ");
int ACTReading = console.nextInt();
System.out.print(" ACT science? ");
int ACTScience = console.nextInt();
double testscore = ( ( 2 * ACTMath + ACTEnglish + ACTReading + ACTScience ) / 1.8 );
System.out.println(" exam score = " + roundNumber(testscore));
return testscore;
}
public static double GPAInfo(double GPA,Scanner console) {
System.out.print(" overall GPA? ");
double OverallGPA = console.nextDouble();
System.out.print(" max GPA? ");
double MaxGPA = console.nextDouble();
System.out.print(" Transcript Multiplier? ");
double TranscriptMultiplier = console.nextDouble();
GPA = ( OverallGPA / MaxGPA * 100 * TranscriptMultiplier );
System.out.println(" GPA score = " + roundNumber(GPA));
System.out.println();
return GPA;
}
public static double roundNumber(double number) {
return (Math.round(number * 10)) / 10.0;
}
public static double finalScore(double TestScore, double GPAScore) {
return TestScore + GPAScore;
}
public static double DisplayResults(double StudentOneTestScore, double StudentOneGPAScore, double StudentTwoTestScore, double StudentTwoGPAScore) {
double StudentOneScore = finalScore(StudentOneTestScore,StudentOneGPAScore);
double StudentTwoScore = finalScore(StudentTwoTestScore,StudentTwoGPAScore);
System.out.println("First applicant overall score = " + roundNumber(StudentOneScore)); //StudentOneTestScore + StudentOneGPAScore);
System.out.println("Second applicant overall score = " + roundNumber(StudentTwoScore)); //StudentTwoTestScore + StudentTwoGPAScore);
if ( StudentOneTestScore + StudentOneGPAScore > StudentTwoTestScore + StudentTwoGPAScore ) {
System.out.println("The first applicant seems to be better");
} else if ( StudentOneTestScore + StudentOneGPAScore < StudentTwoTestScore + StudentTwoGPAScore ) {
System.out.println("The second applicant seems to be better");
} else {
System.out.println("The two applicants seem to be equal");
}
return StudentOneTestScore;
}
}
It seems you have a problem when using methods, returning types and inmutable types.
In the main section:
double testscore = 0;
double GPA = 0;
int Student = 1;
ACTSATScores(1,0,console);
double StudentOneTestScore = testscore;
GPAInfo(0,console);
double StudentOneGPAScore = GPA;
Student = 2;
ACTSATScores(2,0,console);
double StudentTwoTestScore = testscore;
You are assigning those variables the value "testscore". But you really never change that value, and the way you wrote the methods makes me believe that you are expecting testscore to change inside the methods.
Try printing the value of testscore in the main to see that it does not change its value (it should be always 0 in that main). This might be what you are looking for:
double StudentOneTestScore = ACTSATScores(1,0,console);
This is a loan calculator program. I'm having trouble with the math. Everything else seems to be correct except for the value of the beginning balance after 2 months. Notice that the beginning balance of the 3rd month is different from the ending balance of the 2nd month. Same thing for the succeeding months. I've been trying to fix it but everything didn't work out. I need them to be the same so the ending balance of the last month will be 0.
This is a sample output of the program:
Personal Loan Payment Calculator
Enter a loan amount: 1000
Enter the loan term (months): 6
Enter the interest rate (% per year): 9
Loan Payment and Amortization Table
Months Beginning Monthly Principal Interest Ending
Balance Payment Paid Paid Balance
1 1000.00 171.07 163.57 7.50 836.43
2 836.43 171.07 164.80 6.27 671.64
3 670.41 171.07 166.04 5.03 504.37
4 501.88 171.07 167.30 3.76 334.57
5 330.78 171.07 168.59 2.48 162.19
6 157.06 171.07 169.89 1.18 -12.83
Summary:
========
Loan Amount: $1,000.00
Monthly Payment: $171.07
Number of Payments: 6
Total Interest Paid: $24.00
Annual Interest Rate: 9.00%
This is the program:
public class LoanCalculator {
public static void main(String[] args) {
System.out.println("Personal Loan Payment Calculator"); // print the name of the program
System.out.println("================================");
Scanner keyboard = new Scanner (System.in); // define a Scanner object attached to a keyboard
String badInput; // assign non-integer or non-double inputs to badInput
System.out.print("Enter a loan amount: "); // prompt the user to enter loan amount
while ( ! keyboard.hasNextDouble()) // is the first input value a double?
{
badInput = keyboard.next();
System.out.println("Error: expected a Double, encountered: " + badInput);
System.out.println("Please enter a loan amount in Double: ");
}
double loanAmount = keyboard.nextDouble(); // assign the first input to loanAmount
System.out.print("Enter the loan term (months): "); // prompt the user to enter number of months
while ( ! keyboard.hasNextInt()) // is the second input value an int?
{
badInput = keyboard.next();
System.out.println("Error: expected an Integer, encountered: " + badInput);
System.out.println("Please enter a loan term in Integer: ");
}
int loanTerm = keyboard.nextInt(); // assign the second input to loanTerm
System.out.print("Enter the interest rate (% per year): "); // prompt the user to enter the interest rate
while ( ! keyboard.hasNextDouble()) // is the first input value a double?
{
badInput = keyboard.next();
System.out.println("Error: expected an integer, encountered: " + badInput);
System.out.println("Please enter a loan amount in Double: ");
}
double interestRate = keyboard.nextDouble(); // assign the third input to interestRate
System.out.println(); // skip a line
System.out.println(" Loan Payment and Amortization Table");
System.out.printf("%s", "=============================================================");
System.out.println();
System.out.printf("%5s %10s %10s %10s %10s %10s", "Months" ,"Beginning", "Monhtly", "Principal", "Interest", "Ending");
System.out.println();
System.out.printf(" %5s %10s %10s %10s %10s %10s", "#","Balance", "Payment", "Paid", "Paid", "Balance");
System.out.println();
System.out.printf("%s ", "=============================================================");
System.out.println();
double monthlyRate = (interestRate / 100.0) / 12.0;
double monthlyPayment = (monthlyRate * loanAmount) / ( 1 - (Math.pow( 1 + monthlyRate, - loanTerm)));
double beginningBalance = loanAmount;
double interestPaid = beginningBalance * monthlyRate;
double principalPaid = monthlyPayment - interestPaid;
int total_interest_paid = 0;
for (int monthCount = 0 ; monthCount < loanTerm ; ++monthCount)
{
int months = 1 + monthCount;
beginningBalance = loanAmount - principalPaid * monthCount;
interestPaid = beginningBalance * monthlyRate;
principalPaid = monthlyPayment - interestPaid;
double endingBalance = beginningBalance - principalPaid;
System.out.printf(" %5d %10.2f %10.2f %10.2f %10.2f %10.2f\n", months, beginningBalance, monthlyPayment, principalPaid, interestPaid, endingBalance);
total_interest_paid += interestPaid;
}
System.out.printf("%s ", "=============================================================");
System.out.println();
NumberFormat currency = NumberFormat.getCurrencyInstance();
DecimalFormat percentFormat = new DecimalFormat ("0.00");
System.out.println("\nSummary:");
System.out.println("========");
System.out.println("Loan Amount: " + currency.format(loanAmount));
System.out.println("Monthly Payment: " + currency.format(monthlyPayment));
System.out.println("Number of Payments: " + loanTerm);
System.out.println("Total Interest Paid: " + currency.format(total_interest_paid));
System.out.println("Annual Interest Rate: " + percentFormat.format(interestRate) + "%");
}
}
The error is very simple:
beginningBalance = loanAmount - principalPaid * monthCount;
Remember that "principalPaid" increases every month. The total principal paid is not the last principalPaid * mouthCount but the sum of the principal paid in all months.
You could create a running total for principalPaid like you did for interest paid.
But it would be much easier to do beginningBalance = previous month endingBalance.
When I call this code in Terminal on my Mac it tells me "could not find or load main class" also it gives me a lot of errors on all of my code regarding printf.
I am new to Java so I assume this code is error ridden.
All I am really asking is how to fix it so it will run in terminal when I type "java itemprice" for it to not show an error.
Also I would like some help with the system.out.printf code.
import java.util.Scanner;
public class itempricecalc {
public static void main(String[] args){
Scanner scanner = new Scanner(System.in);
System.out.print("What is your first name?");
String fname = scanner.nextLine();
String invf = fname.substring(0,2);
System.out.print("What is your last name?");
String lname = scanner.nextLine();
String invl = lname.substring(0,2);
System.out.println("Your name is: " +fname + lname);
System.out.println("What is your zipcode?");
int zipcode = scanner.nextInt();
invoice = (invf + invl + zipcode);
double salestax = 6.25;
double subtotal = 0;
System.out.println("What is item 1 called?")
String itemonename = scanner.nextLine():
System.out.println("Enter price of item 1");
double itemone = scanner.nextDouble();
System.out.println("How many of item 1 did you purchase?");
int itemoneamount = scanner.nextInt();
System.out.println("What is item 2 called?")
String itemtwoname = scanner.nextLine():
System.out.println("Enter price of item 2");
double itemtwo = scanner.nextDouble();
System.out.println("How many of item 2 did you purchase?");
int itemtwoamount = scanner.nextInt();
System.out.println("What is item 3 called?")
String itemthreename = scanner.nextLine():
System.out.println("Enter price of item 3");
double itemthree = scanner.nextDouble();
System.out.println("How many of item 3 did you purchase?");
int itemthreeamount = scanner.nextInt();
double itemonetp = itemoneamount * itemone;
double itemtwotp = itemtwoamount * itemtwo;
double totalprice = itemonetp + itemtwotp;
subtotal = subtotal + totalprice;
double taxtotal = subtotal * salestax;
System.out.print("Your name is: " + fname + " " + lname)
System.out.printf(“Invoice: %.2f”, invoice);
System.out.printf(“Total price of item one is + %.2f”, itemonetp);
System.out.printf(“Total price of item two is + %.2f”, itemtwotp);
System.out.printf(“Total price of your purchase is + %.2f”, totalprice);
System.out.printf(“Your total with tax comes to + %.2f”, taxtotal);
System.out.printf(“You purchased + %.2f + amount of item one”, itemoneamount);
System.out.printf(“You purchased + %.2f + amount of item two”, itemtwoamount);
}
}
I have two programs:
Score.java set to do the following:
read scores from the keyboard and print their average.
The scores will be numeric and may include a decimal part.
For example a score might be 8.73 or some such. Different contests will have different numbers of judges. It will keep asking for and reading in scores until the user types 'done'. The program will then print the total score, the number of scores and the average score. The program will then prompt the user to see if there are any more contestants. If there are begin prompting for scores again. If there are no more then exit the program." I have it set to stop the program when you enter "N", and set to add future entries to the calculation after entering "Y".
import java.util.Scanner;
// This is the Score program
// Written by me
public class Score
{
public static void main(String args[])
{
Scanner game = new Scanner(System.in);
double num = 0.0;
double sum = 0.0;
int cnt = 0;
while (true)
{
System.out.println("Enter as many non-negative integers as you like ");
System.out.println("one at a time and I will find the average");
System.out.println("Enter done to stop entering numbers");
System.out.print("enter number: ");
String ans = game.next();
while (!ans.equals("done"))
{
num = Double.parseDouble(ans);
sum = sum + num;
cnt = cnt + 1;
System.out.print("enter number: ");
ans = game.next();
}
System.out.println(cnt);
System.out.println(sum);
System.out.println("Total Score " + sum + " count scores " + cnt + " avg score " + sum / cnt);
System.out.println("Enter another contestant (Y/N)?");
String str = game.next();
if (!str.equals("Y"))
break;
}
}
}
While the above process works, I cannot get my second program, Olympic.java, to work properly after typing "Y" to add more scores. Instead, it starts a whole new calculation of average instead of adding to the previous calculations:
import java.util.Scanner;
// This is the Olympic program
// Written by me
public class Olympic
{
public static void main(String args[])
{
Scanner game = new Scanner(System.in);
double num = 0.0;
double sum = 0.0;
int cnt = 0;
double highscore = Double.MAX_VALUE;
double lowscore = Double.MIN_VALUE;
while (true)
{
System.out.println("Enter as many non-negative integers as you like ");
System.out.println("one at a time and I will find the average");
System.out.println("Enter done to stop entering numbers");
System.out.print("enter number: ");
String ans = game.next();
lowscore = game.nextDouble();
highscore = game.nextDouble();
while (!ans.equals("done"))
{
num = Double.parseDouble(ans);
sum = (sum + num) - lowscore - highscore;
cnt = cnt + 1;
System.out.print("enter number: ");
if (num > highscore)
{
highscore = num;
}
if (num < lowscore)
{
lowscore = num;
}
ans = game.next();
}
System.out.println("Throwing out low score " + lowscore + " and high score " + highscore);
System.out.println("Total Score " + sum + " count scores " + cnt + " avg score " + sum / cnt);
System.out.println("Enter another contestant (Y/N)?");
String str = game.next();
if (!str.equals("Y"))
break;
}
}
}
So I did a really quick test
public static void main(String[] args) {
Scanner game = new Scanner(System.in);
while (true) {
System.out.println("Enter another contestant (Y/N)?");
String str = game.next();
if (!str.equalsIgnoreCase("Y")) {
break;
}
}
System.out.println("I'm free");
}
And this will exit fine.
As to your second problem. I think your logic is a little skewed. You could try something like...
Scanner game = new Scanner(System.in);
double num = 0;
double sum = 0;
int cnt = 0;
while (true) {
System.out.println("Enter as many non-negative integers as you like ");
System.out.println("one at a time and I will find the average");
System.out.println("Enter done to stop entering numbers");
double lowscore = Double.MAX_VALUE;
double highscore = 0;
System.out.print("enter number: ");
String ans = game.next();
while (!ans.equals("done")) {
num = Double.parseDouble(ans);
lowscore = Math.min(lowscore, num);
highscore = Math.max(highscore, num);
sum += num;
cnt++;
System.out.print("enter number: ");
if (num > highscore) {
highscore = num;
}
if (num < lowscore) {
lowscore = num;
}
ans = game.next();
}
sum -= lowscore;
sum -= highscore;
System.out.println("Throwing out low score " + lowscore + " and high score " + highscore);
System.out.println("Total Score " + sum + " count scores " + cnt + " avg score " + sum / cnt);
System.out.println("Enter another contestant (Y/N)?");
String str = game.next();
if (!str.equalsIgnoreCase("Y")) {
break;
}
}
This will output...
Enter as many non-negative integers as you like
one at a time and I will find the average
Enter done to stop entering numbers
enter number: 1
enter number: 2
enter number: 3
enter number: 4
enter number: 5
enter number: 6
enter number: 7
enter number: 8
enter number: 9
enter number: 10
enter number: done
Throwing out low score 1.0 and high score 10.0
Total Score 44.0 count scores 10 avg score 4.4
Enter another contestant (Y/N)?
y
Enter as many non-negative integers as you like
one at a time and I will find the average
Enter done to stop entering numbers
enter number: 1
enter number: 12
enter number: 13
enter number: 14
enter number: 15
enter number: 16
enter number: 17
enter number: 18
enter number: 19
enter number: 20
enter number: done
Throwing out low score 1.0 and high score 20.0
Total Score 168.0 count scores 20 avg score 8.4
Enter another contestant (Y/N)?
n
As to your exception. When using Scanner.nextDouble, it will throw an exception if the input is not parsable as a double. You will need to deal with this situation as you see fit...