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Converting feet and inches to inches (multiple inputs into one input)

This program has me stumped. I'm trying to figure out a way to convert input from this:
System.out.print("Enter your height in inches (e.g. 57): ");
String height = in.nextLine();
height += in.nextLine();
System.out.println();
and turn it into just inches. How do I separate the feet from the inches, change said feet to inches and combine them into a sum of inches once again?

System.out.print("Enter your height in inches (e.g. 57): ");
int heightInInches = in.nextInt();
int heightInFeet = heightInInches / 12;
int heightInchesRemaining = heightInInches % 12;
System.out.println(heightInFeet + "\' " + heightInchesRemaining + "\"");
You can convert into ft. and in. format by doing that. Then do whatever you need to with the rest of the operations that you described.

first of all, your question and sample code is confusing so I will base my answer on your last statement. From my understanding, you ask the user to input his height in feet first then the remaining inches and convert this info to inches only (e.g 5'7 to 67 inches)
System.out.print("Enter your height in feet. (e.g, 5 if your height is 5'7) : ");
int height = in.nextInt() * 12;
System.out.print("Enter your height in inches (e.g, 7 if your height is 5'7) : ");
height += in.nextInt();
System.out.println(height);

Change Calculator Subtracting One

My calculator in Java will not output the correct amount of change. It subtracts one penny and I am not sure why.
I initially declared the change as separate variables but I then just multiplied the users input by 100, but I still have the same problem.
//this is where the variables are declared
double penny = 0.01;
double nickel = 0.05;
double dime = 0.10;
double quarter = 0.25;
double half_dollar = 0.50;
double dollar_coin = 1.00;
double user_input = 0;
int total_penny, total_nickel, total_dime, total_quarter,
total_half_dollar, total_dollar_coin;
Scanner in = new Scanner (System.in);
//this is where the user can input data
System.out.println("What amount would you like change for: ");
user_input = in.nextDouble();
//this is where the users data will be processed
total_dollar_coin = (int) (user_input / 1.0);
user_input = user_input % 1.00;
total_half_dollar = (int) (user_input / 0.50);
user_input = user_input % 0.50;
total_quarter = (int) (user_input / 0.25);
user_input = user_input % 0.25;
total_dime = (int) (user_input / 0.10);
user_input = user_input % 0.10;
total_nickel = (int) (user_input / 0.05);
user_input = user_input % 0.01;
total_penny = (int) (user_input / 0.01);
//this is where the information will be outputted to the user
System.out.println("Your change will be: " + total_dollar_coin + " dollar
coin(s) ");
System.out.println(total_half_dollar + " half dollar coin(s) " +
total_quarter
+ " quarter(s) ");
System.out.print(total_dime + " dime(s) " + total_nickel + " nickel(s) " +
total_penny + " penny (or pennies) ");
}
}

If you debug this, you will see that for e.g. 51.43 your last line:
total_penny = (int) (user_input / 0.01);
results in something like:
Since you are casting to int, this will result in "unexpected output", in this case zero (0) - see link provided above in the second comment regarding accuracy.
Nonetheless, a possible solution to the problem (as an educational exercise) is to do the following:
BigDecimal total_penny;
int total_nickel, total_dime, total_quarter, total_half_dollar, total_dollar_coin;
And then in your total_penny line:
user_input = user_input % 0.05; --> you have 0.01 typo here
total_penny = BigDecimal.valueOf(user_input / 0.01);
Format the total_penny output and output that:
String penny = NumberFormat.getInstance().format(total_penny);
System.out.println("..." + penny + " penny (or pennies) ");
This will give you the amount you expect:

Calculate BMI using command line arguments inputs

first question here. I have to use a previous assignment of calculating BMI, and reformat it to accept command line arguments as inputs for height and weight.
"Your program shall obtain the weight and the height via main(String[] args), i.e,, when you run your program you must do the following:
java MyProgramName 180 5 7
where MyProgramName is the name of your program, 180 is the weight in pounds, 5 is the feet and 7 is the inch values.
The program shall output the BMI value in the terminal window as it was before (item f below)."
I am confused on how to call the arguments into the code while performing operands on them.
Here is my original code:
'int weight;
int heightInInches;
int bmi;
Scanner keyboard = new Scanner(System.in);
System.out.print("Enter your weight in pounds: ");
weight = keyboard.nextInt();
System.out.print("Enter your height in inches: ");
heightInInches = keyboard.nextInt();
bmi = ((weight * 703)/(heightInInches * heightInInches));
System.out.println("Your height is " + heightInInches + " and your
weight is: " + weight + " pounds");
System.out.println("Your BMI is " + bmi);'
I have seen something like this for just adding two numbers, but am confused how to alter it to the BMI formula.
int sum = 0;
for (int i = 0; i < args.length; i++) {
sum = sum + Integer.parseInt(args[i]);
}
System.out.println("The sum of the arguments passed is " + sum);
Thanks

Your String[] args would look something like the s: ["180","5","7"]
So args[0] would be your weight.
args[1] would be the heightInFeet (multiply by 12 to get heightInInches)
args[2] would be the inches part of the height
So the code becomes:
int weight = Integer.parseInt(args[0]);
int heightInInches = Integer.parseInt(args[1])*12 + Integer.parseInt(args[2]);
bmi = ((weight * 703)/(heightInInches * heightInInches));

Java Loan Calculator nested for loop based on user input

The task is to create a loan calculator based on the user input of min and max years of loan payments, loan amount, and min and max % rate with incremented value given by user as well for rate and number of years.
Desired output should look like this:
Principle: $275000.0
Years to repay: 10
Interest Monthly
Rate Payment
6.25 3087.7
6.75 3157.66
7.25 3228.53
Principle: $275000.0
Years to repay: 15
Interest Monthly
Rate Payment
6.25 2357.91
6.75 2433.5
7.25 2510.37
Principle: $275000.0
Years to repay: 20
Interest Monthly
Rate Payment
6.25 2010.05
6.75 2091.0
7.25 2173.53
Please help me fix errors. Thanks!
public static void main(String[] args){
Scanner console = new Scanner (System.in);
System.out.println("This program computes monthly " + "mortgage payments.");
System.out.print("Enter the loan amount: ");
double loan = console.nextDouble();
System.out.print("Enter the starting number of years to repay the loan: ");
int startingYears = console.nextInt();
System.out.print("Enter the ending number of years to repay the loan: ");
int endingYears = console.nextInt();
System.out.print("Enter the years increment between tables: ");
int incrementYears = console.nextInt();
System.out.print("Enter the starting loan yearly interest rate, %: ");
double startingRate = console.nextDouble();
System.out.print("Enter the ending loan yearly interest rate, %: ");
double endingRate = console.nextDouble();
System.out.print("Enter the increment interest rate, %: ");
double incrementRate = console.nextDouble();
System.out.println();
System.out.println("Principle: $" + (double) loan);
System.out.printf("Years to repay: %d\n", startingYears);
System.out.println("-------- -------");
double payment;
System.out.println("Rate\tPayment");
for (int j = startingYears; j <= endingYears; incrementYears++) {
for (double i = startingRate; i <= endingRate; incrementRate++){
int n = 12 * startingYears;
double c = startingRate / 12.0 / 100.0;
payment = loan * c * Math.pow(1 + c, n) / (Math.pow(1 +c, n) - 1);
System.out.println(i + " " + payment);
// System.out.println(round2(startingRate) + "\t" + round2(payment));
startingYears += incrementYears;
}
}
}
}

for (int j = startingYears; j <= endingYears; incrementYears++) {
for (double i = startingRate; i <= endingRate; incrementRate++) {
You are never incrementing the values of your counters i.e. i and j and hence the values of i and j will always be equal to the initialized values and these loops will run for infinite times.
Increment both the counters to be able to reach the termination condition i.e. j <= endingYears and i <= endingRate respectively.
Here is the code snippet:
System.out.println("Principle: $" + (double) loan);
for (int j = startingYears; j <= endingYears; j+=incrementYears) {
System.out.printf("Years to repay: %d\n", j);
System.out.println("-------- -------");
System.out.println("Rate\tPayment");
for (double i = startingRate; i <= endingRate; i+=incrementRate){
int n = 12 * j;
double c = i / 12.0 / 100.0;
double payment = loan * c * Math.pow(1 + c, n) / (Math.pow(1 + c, n) - 1);
System.out.println(i + "\t" + payment);
}
System.out.println();
}

Java Skipping last variable [closed]

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This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
Closed 8 years ago.
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I have been trying to make a basic calculator that calculates the mean of 9 numbers. The problem is it always skips the last line.
My code:
/* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package avarage.calc;
import java.util.Scanner;
/**
*
* #author taine
*/
public class AvarageCalc {
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
Scanner input = new Scanner(System.in);
double num1;
double num2;
double num3;
double num4;
double num5;
double num6;
double num7;
double num8;
double num9;
double num10;
double ans;
System.out.print("Enter Number #1:");
num1 = input.nextDouble();
System.out.print("Enter Number #2:");
num2 = input.nextDouble();
System.out.print("Enter Number #3:");
num3 = input.nextDouble();
System.out.print("Enter Number #4:");
num4 = input.nextDouble();
System.out.print("Enter Number #5:");
num5 = input.nextDouble();
System.out.print("Enter Number #6:");
num6 = input.nextDouble();
System.out.print("Enter Number #7:");
num7 = input.nextDouble();
System.out.print("Enter Number #8:");
num8 = input.nextDouble();
System.out.print("Enter Number #9:");
num9 = input.nextDouble();
ans = num1 + num2 + num3 + num4 + num5 + num6 + num8 + num9;
System.out.println("The Average of the numbers you gave is:" + ans / 9);
}
}
When the program runs:
run:
Enter Number #1:20
Enter Number #2:20
Enter Number #3:20
Enter Number #4:20
Enter Number #5:20
Enter Number #6:20
Enter Number #7:20
Enter Number #8:20
Enter Number #9:20
The Average of the numbers you gave is:17.77777777777778
BUILD SUCCESSFUL (total time: 10 seconds)

Your average is incorrect because you are missing num7 in your sum
ans = num1 + num2 + num3 + num4 + num5 + num6 + num8 + num9;
should be
ans = num1 + num2 + num3 + num4 + num5 + num6 + num7 + num8 + num9;

You have 10 variables, but you calculate average of 9. Is it what you want? Anyway, #the-tom has showed your mistake. You've forgot about num7 variable.
The less lines of code you have the less possibility to get an error.
Probably will be better to do something like that:
double ans = 0;
Scanner input = new Scanner(System.in);
int x = 9 //Or some other number
for(int i = 1; i <= x; i++){
System.out.print("Enter Number #" + i);
ans += input.nextDouble();
}
System.out.println("The Average of the numbers you gave is:" + ans / x);
Now if you need to calculate average of 20 elements, all you need is just set the value of x to 20.