Calculating Average Of Values
Apr 21, 2014I'm struggling with this assignment I was given:
Given list of positive integer values, write a program to calculate average of the values. List terminates with -1.
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Java Calculating Mean Average
Feb 21, 2014I am trying to do the following java assignment and every thing seems to work fine except when I put a number<4 or >10 it prints both "Invalid grade!"
"You didn't enter any data!" what I wanted is to print only "Invalid grade!" I tried to fix it but I couldn't.
Create a program that asks for results of exams and calculates the mean average of the grades. Grades are floating point numbers between 4 and 10. Program asks for grades until a negative number is typed. If user gives a grade other than a number between 4 and 10, the text "Invalid grade!" will be printed on screen and program asks for another grade. Finally the program prints the number of inputted grades and their mean average on screen as shown in the example print. If no grades were inputted, the notice "You did not input any grades." is the only thing printed on screen.
A double type variable is to be used to store the value of the average.
Program is written to a class called Average.
Example output
Program calculates the average of inputted grades.
Finish with a negative integer.
Input a grade (4-10): 5
Input a grade (4-10): 6,5
Input a grade (4-10): 7,5
Input a grade (4-10): 7
Input a grade (4-10): 0
Invalid grade!
Input a grade (4-10): -4
4 grades inputted.
Average of the grades: 6.5
Java Code:
import java.util.Scanner;
public class apples {
public static void main(String[] args)
int inputNumber=0;
int sum;
int count;
double average;
[Code] .....
Calculating Average Of Two Ints And Converting To A Double
Oct 31, 2014I have been asked to construct an application that will read in the exam mark and coursework mark and then print out to 1 decimal place the average of the coursework and exam mark. When I submit it it says it's incorrect.
class Main
{
public static void main( String args[] )
{
int ExamMark=71;
int CourseworkMark=40;
double mark = (double)(ExamMark + CourseworkMark) / 2;
[Code] ....
Calculating Average Of Two Ints And Converting To Double In Java?
Oct 31, 2014how to use Java and for my coursework I have been asked to construct an application that will read in the exam mark and coursework mark and then print out to 1 decimal place the average of the coursework and exam mark. When I submit it to the coursework submission system it says it's incorrect.
The answer that it's asking for is the answer that my code produces (ex = 71 cw = 40 mark = 55.5) But for some reason it says this when I submit it:
-#### << Differences between expected (<) your answer (>) >> ------------
1c1
< ex= 91 cw = 80 mark = 85.5
---
> ex = 71 cw = 40 mark = 55.5
-------------------------------------------------------------------------
Check the above output for why this attempt failed And when I change the ex to 91 and cw to 80 it asks for > ex = 71 cw = 40 mark = 55.5 again.
class Main
{
public static void main( String args[] ) {
int ExamMark=71;
int CourseworkMark=40;
double cost = (double)(ExamMark + CourseworkMark) / 2;
System.out.printf("ex = " + ExamMark + " cw = " + CourseworkMark + " mark = " + cost);
System.out.println();
}
}
Average Program - Divisible Numbers Not Calculating Correctly
May 21, 2015For some reason, the averages aren't calculating correctly. I'm aware I need to convert to double if I'm dividing by an odd amount but that itself isn't the issue. It's just simple easy divisible numbers that are not being calculated correctly. For instance, (10 + 10 + 10 + 50) / 4 = should be 2 but I get 10.
Here is the code:
import java.util.Scanner;
public class Avg {
public static void main(String[] args){
Scanner inputGains = new Scanner(System.in);
int userInput = inputGains.nextInt();
[Code] ....
Calculating Average Of Two Arrays - Calculation Coming Out Incorrect
Oct 8, 2014I am working on an assignment, and I have come up with a program that runs, but it does not run correctly. This is the assignment:
Write two overloaded methods that return the average of an array with the following headers:
public static int average(int[] array)
public static double average(double[] array)
Write a test program that prompts the user to enter ten double values, invokes this method and displays the average value.
When I run it my averages are coming out incorrect, and I am not sure why. I have tried moving and rearranging things and nothing is working.
Java Code:
public static int average(int[] array) {
int sum = 0;
int average = 0;
[Code].....
Calculating Total And Average Of Price Of Items - Not Getting Correct Output
Jun 27, 2014Why is my program not calculating the total and average of the price of the items and not printing it out?
Java 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 assignment4;
[code]...
It prints out everything but the total of the items and I dont know why. :(
Getting Wrong Values When Calculating Perimeter And Area?
Mar 22, 2015I've been given a school assignment that reads, "Rewrite the main class Geometry so it takes in the dimensions for the triangle and ellipse as user inputs and create a Triangle and an Ellipse class. Use the appropriate variable types, constants, variable names and computational formulas.
Triangle class will have a computePerimeter and a computeArea methods Ellipse class will have a computeArea method Create Report class
• Create a method createReport that takes the values returned from Triangle and Ellipse and combines them in the following message and displays it. Format the values so that they have 2 decimals.
“The triangle has a perimeter of [perimeter] with an area of [area] while the ellipse has an area of [area]”
• Create a method switchReport that takes the original string from createReport and changes the message to display using the available methods in the String class
“The ellipse has an area of [area] while the triangle has an area of [area] with a perimeter of [perimeter]”"
I've run into a problem when creating the createReport method. Everytime i run it i get incorrect values for the perimeter and area (namely i get zero every time).
my code is as follows:
public class Triangle
{
public double base;
public double height;
public double hypotenuse;
private double tArea;
private double perimeter;
public Triangle()
{
base = 0;
height = 0;
hypotenuse = 0;
[code]....
For the triangle class and
public class Report {
Triangle tri2 = new Triangle();
Ellipse eli2 = new Ellipse();
public Report() {
}
public void createReport() {
System.out.println("The triangle has a perimeter of "+tri2.computePerimeter() +" with an area of " +tri2.computeTArea() +" while the ellipse has an area of " +eli2.computeEArea() );
}
for the report class.the Geometry class allows you to input values and if i skip the report and simply print the perimeter and area they are correct. However with the report class it simply gives me zeros.
Calculating Values And Passing From Two-dimensional Array
Jan 29, 2014Long story short: The program takes user values (temperature) and converts them to the opposite (C >> F / F >> C)
I originally started this program with three separate arrays but then decided that it would be a good opportunity to use a two-dimensional array and one other.
The two-dimensional array has 2 rows, 10 columns. The second is a normal String array ...
Java Code:
String[][] myTemperatures = new String[2][9];
String inputAssembly[] = new String[9]; mh_sh_highlight_all('java');
I prompt the user for to enter temperature values, using a GUI and jbutton to distinguish F/C. Each time the user clicks 'continue', the values are stored into the two-dimensional array. One row holds the temperature, the other holds the C or F designation.
Java Code:
// CONTINUE BUTTON CLICK ACTIONS
class ContinueButtonListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
input = view.getTempValue();
[Code] ....
This is where I am experiencing the trouble and I cannot seem to get the Debug to work properly here. When the two-dimensional array is full OR the user clicks 'calculate' instead of 'continue', the Calculate event is performed via an ActionListener.
Java Code:
// CALCULATE BUTTON CLICK ACTIONS
class CalculateButtonListener implements ActionListener{
@Override
public void actionPerformed(ActionEvent arg0) {
// TODO Auto-generated method stub
String hold;
Double temp;
And I get a ton of errrors ...
Java Code:
Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "[Ljava.lang.String;@7441b1fd"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
[Code] ....
I imagine the issue lies within how I am handling the two-dimensional array in the CALCULATE event and/or converting the String[][] to String then parsing to an Integer.
Would this be better done is separate arrays (not using one two-dimensional, but storing 34C, 45F ... in one. I think this would be difficult for me to parse for conversions).
Calculating Pi In While Or Do While Loop
Oct 23, 2014USING A WHILE OR A DO-WHILE LOOP write a program to compute PI using the following equation:
PI = 3 + 4/(2*3*4) - 4/(4*5*6) + 4/(6*7*8) - 4/(8*9*10) + ...
Allow the user to specify the number of terms (5 terms are shown) to use in the computation. Each time around the loop only one extra term should be added to the estimate for PI.
Alter your solution from part one so that the user is allowed to specify the precision required between 1 and 8 digits (i.e. the number of digits which are correct; e.g. to 5 digits PI is 3.14159), rather than the number of terms. The condition on the loop should be altered so that it continues until the required precision is obtained. Note that you need only submit this second version of the program (assuming you have it working).
Calculating Sin(x) Without Using Math
Sep 14, 2014I'm trying to calculate sin(x) without using Math.sin(x). The formula for sin(x) is: x - x^3/3! + x^5/5! ... I can't seem to get the coding for the alternating +/- right. Here's my program:
import java.util.Scanner;
import java.lang.Math;
class Sin
{
public static void main(String[] args)
{
Scanner kb = new Scanner(System.in);
int n, c, fact = 1, count = 1;
double x, sum = 0, sum_sin = 0, result;
[Code] ....
Calculating Factorial Of Int Number
Mar 2, 2014I'm working on some exercises and I'm having some problems with a method. I want to create a method to calculate the Factorial of an int number. I already wrote code that asks the user to input an int number and it calculates the Factorial, and it works fine
i.e.: if I input 5 it outputs
5! = 120
as it should. Here's the code:
import java.util.Scanner;
public class Factorial1 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int number;
int total = 1;
[Code] ....
Now I want to make a method to re-use this code in other programs and I wrote this program:
public class TestClass {
public static void main(String[] args) {
System.out.print(factorial(5));
}
public static int factorial(int x) {
int total = 0;
[Code] ....
But when I run this program it outputs 0 instead of 120. What is wrong with this code as it compiles just fine but doesn't work as intended.
Calculating Factorials Using BlueJ
Oct 7, 2014I am trying to calculate factorials using BlueJ. All of my factorials calculate correctly, I am just having an issue with something the instructor asked of us. She asked us to force the loop to stop when the user inputs "Calculate the factorial of 0", and not give any print.
So far I have my for loop with the correct conditions, I am just really confused as to how to make an if statement to stop the code when the input is 0.
Calculating FPS - Delta Variable
May 26, 2014I am working on the first example in this java game programming book. I am having trouble understanding this basic concept. How does the delta variable work throughout this class? I know the syntax I just don't understand the concept fully.
Explain these components of the program:
1) delta += current-lastTime works
2) lastTime = current;
3) if(delta > 1000)
{
delta-1000
....
}
package javagames.util;
public class FrameRate {
private String frameRate;
private long lastTime;
private long delta;
private int frameCount;
[Code] .....
Calculating Total Payout
Jun 5, 2014what I'm missing to calculate the Total Payout that Payroll has given out to two employees. the professor states that we have to use "getTotalPayout" . It would have been easy to do "(employee1.getFinal() + employee2.getFinal())" but he use getTotalPayout.
public class Payroll
{
private String employeeId;
private int hourlyrate, hoursworked;
private int increaseHours = 10;
private double TotalPayout;
[code]....
Calculating Area With JOptionPane?
Sep 9, 2014I am supposed to be doing a class assignment that calculates the area of a triangle and outputs with JOptionPane. I was able to fix some errors, but it's uncovering more errors.Here is my code:
import javax.swing.JOptionPane;
import java.util.*;
import java.text.DecimalFormat;
import java.util.StringTokenizer;
public class Area {
public static void main (String [] args) {
double a, b, c; //Input sides of triangle
double x; //Perimeter of triangle
double area; //Area of triangle
StringTokenizer st;
[code]....
Calculating Years Between Two Dates?
Feb 24, 2014write a program that reads in the year, month, and day of a couple's wedding date and compute thier next wedding anniversary after March 2, 2011.
TThis has to be input in a message dialog box also.
HashCode For Calculating Different Objects
Jun 22, 2014I'm trying to make a method that creates objects of a parameterized type randomly, but also to store the hashCode of different objects created and if at any time the percentage of different objects is less than 50% throw an exception.
This last part is where I've gotten stuck. I have created a population property where I store the different hashCodes and update it in the method adding the new hashCode from the new object. But I don't know how to do for to know if the percentage of different objects is less than 50%.
package fp.tipos.apps;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.List;
import java.util.Random;
public class FactoriaApps {
[Code] .....
Calculating Sum Of Elements Within JList
Mar 25, 2015I'm currently in the process of creating a shopping cart simulation. The main GUI consists of two lists, one is a list of the inventory. (products stored within a .dat file which is automatically loaded upon launch) The other is blank and is to model my shopping basket. The idea is to be able to scan items from my inventory into the checkout basket. As this is happening i want a text field i created to dynamically update with the cost of all the items in the basket.
Below is the method for my scan button, which is supposed to perform the above :
public void actionPerformed(ActionEvent evt) {
//Get the newly added list values.
JList list = productList.getSelectedValuesList();
double totalAddedValue = 0.0;
double oldCartValue = 0.0;
[code]...
Calculating Area And Circumference Of A Circle
Apr 21, 2014Here is the code that I wrote out:
//program that calculates the circumference and area of a circle
import java.util.Scanner;
public class circle{
public static void main(String[] args){
Scanner input= new Scanner( System.in);
double r; //declares radius
[Code] .....
And here is what is displayed in the command prompt when I compile my code:
circle.java:17: error: cannot find symbol
r.input.nextdouble();//entered the radius
symbol: method nextdouble()
location: variable input of type Scanner
1 error
What am I doing wrong?
Calculating Rainfall Quarterly Per Year
Mar 30, 2015//calculates rainfall quarterly per year
import java.util.Scanner;
public class SophiaKeyProgram2 {
public static void main(String[] args) {
// TODO Auto-generated method stub
int numQuarter; //number of quarters in a year
double rainfall=0; //the amount of rain
[Code] ....
Calculating Points On A Circle Using Radius
Oct 24, 2014I have to print points on a circle in increments of -0.1, but when I use a number larger than 1.3, the list stops at 0.1 larger than negRadius, and I don't know why. (Assume the center is (0,0))
public class PointsOnACircleV1
{
public static void main(String[] args)
{
double radius = 1;
[code]...
Why Is It Not Calculating The Total After Leaving The Loop
Feb 27, 2015i want it to calculate my earnings say for 4 months and then output the result. it runs the loop asking for the 4 months worth of earnings but then it shows just the amount entered for the month and not total.
package Earnings;
import java.util.Scanner;
import java.lang.Math;
public class Earnings {
public static void main(String[] args) {
[code]....
i tried changing from double month to String month but it doesn't work.
Swing/AWT/SWT :: Getting Numbers And Calculating Them In JTable
May 26, 2014What I am trying to do on jtable is when a user enters values of numbers in the table, by click of button, those numbers are calculated and display in another column. For example, 4 = 2 + 2 in a table.This means getting inputs from user and summing them up. My getRowCount() and getValueAt() methods don't seem to work for me recently.
View Replies View RelatedCalculating Number Through 4 Drop Down Menus
Jan 5, 2015How to calculate an outcome/number through a combination of 4 drop down menus (drop down menu's 1 and 2 combine to form a specific value and menu's 3 and 4 combine to form a specific value), example ;
1st drop down menu (1*) = a,b,c,d,e
2nd drop down menu (2*) = 5,4,3,2,1
3rd drop down menu (3*)= a,b,c,d,e
4th drop down menu (4*)= 5,4,3,2,1
Example of drop down menu layout - [URL] ....
a->e = low to high (value) predominant value so b5>a1 ; d5>c1
5->1 = low to high (value)
Then the calculation involves the 1st and 2nd menu to form 1 value, so c3, e4 etc and the 3rd and 4th menu unite to form 1 value that is different from the first; c2, e3
So (1*2*) b3 ; (3*4*) b1 = x value
Also the value from 1*2* menu must be lower than value from menu 3*4*; so you cannot input 1*2* c4 ; 3*4* c5 /or b1 (so once the first menu is selected, the 3rd and 4th menu's wont show anything lower)...
Calculating Areas Of Geometric Shapes
Oct 21, 2014Write a class that has three overloaded static methods for calculating the areas of the
following geometric shapes:
• circles -- area = π*radius^2 (format the answer to have two decimal places)
• rectangles -- area = width * length
• trapezoid -- area = (base1 + base2) * height/2
Because the three methods are to be overloaded, they should each have the same name , but different parameters (for example, the method to be used with circles should only take one parameter , the radius of the circle).
Demonstrate the methods in a program that prints out the following areas, each on a separate line:
• the area of a circle with radius 3
• the area of a rectangle with length 2 and width 4
• the area of a trapezoid with base lengths 3 and 5 and height 5
SAMPLE RUN #1
--- Prompts For Keyboard/Console/Standard Input ---
Inputs
Outputs
--- Monitor/Console/Standard Output ---
28.27
8.0
17.5
What The Console Looks Like In An Interactive Session:
(Note: this combines standard input with standard output )
>java Area
28.27
8.0
17.5
THIS IS MY CODE
import java.util.*;
public class Area {
public static double area(double radius)
{
return (double)(Math.PI*Math.pow(radius,2));
}
public static int area(int length, int breadth)
[Code] ....