Why I am getting errors for this program I (tried) to write. I am new to java.
import java.util.Scanner;
public class TheBarkingLot {
public static void main(String args[]) {
int n;
Scanner input = new Scanner(System.in);
System.out.println("How many large dogs are boarding today?");
[Code] ....
A wages calculator application is required that can determine the total cost of crew departing from the port on that day. To do this, the application reads from an itinerary text file containing each ship being loaded in the port that day, in the following format:
<ship id>
<journey id>
<l> // where <l> is the length in hours of the journey
<s> // where <s> is the number of crew for the ship for this journey
<rate> // for each s, <rate> is hourly rate of pay
Your application must calculate the total cost of the crew for each ship/journey and then compare it with a "recommended maximum journey cost" (RM) amount typed in by the user when the application is first run. If the total amount is less than or equal to RM then the details must be written to the screen and to an output text file called wagedaily.txt. If the amount is larger than RM then the results must be written to the screen only. Messages to the screen must indicate whether the crew cost is less than, equal to or larger than RM.
Your application should find the ship with the highest crew cost that is below RM and print this out as the final piece of output to the screen.
It has given me a bunch of ships and numbers to play around with in the code, here they are:
Monarch
M141
16
6
10.5
10.5
[Code] ....
my task is to add a few functions to an example calculator. I managed to add a divide button but I simply can't figure out how to add a working Pi and reciprocal function.
package newjavaproject;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class CalculateurNC extends Applet {
[code]....
im considered quite the "javanoob" as my account name states..The assignment is to basically take a number that is entered by a user, and based off what they type in, display a corresponding grade letter. For example, if they enter a number between 90-100, they should receive a response that they received an "A". Now, this is fairly simple using an if/else statement, but my professor wanted us to implement this, using a switch case to teach us the difference.
import java.util.*;
public class SwitchTest
{
public static void main(String[] args)
{
Scanner scan = new Scanner(System.in);
System.out.println("Please enter a number to find out what letter grade you have recieved");
[code]...
I want a simple jsp page that performs basic operations on numbers such as addition, subtraction, multiplication, division and modulus . How to run that file?
View Replies View RelatedHow can i write a java program that simulate a simple calculator that performs the basic arithmetic operations of JAVA. (JOption Pane and Repeat control structure)
Example : Addition, Subtraction, Multiplication, Division.
The program will prompt to input two floating point numbers and a character that represents the operations presented above. In the event that the operator input is valid, prompt the user to input the operator again.
Sample Output :
First number 7
Second number 4
Menu
<+> Addition
<-> Subtraction
<*> Multiplication
</> Division
Enter Choice: * <enter>
The answer is 28.
So, I am supposed to write a program that calculates the total annual compensation for a salesman using user input for the salary, sales, and commission rate (list of 3 predefined commission rates. have to display in dollar format the amount of commission and total annual salary.
CommCalc class
public class CommCalc
{
//attributes of class, stored data
private double sales;
private double salary;
private double rate;
//and a total field? beware stale data.
//store sales argument from sales field
public void setSales(double sal)
[Code] ....
I know that i have to fix some of the semantics . I have this code that I made earlier, is there an easy way to make it into a GUI interface? Or will I have to go throughthe code lines to add the JOptionPane? And I am a little confused on how to make a list (array) for the commission rate.
HTML Code:
import java.util.Scanner;
public class BellmanFord {
private int distances[];
private int numberofvertices;
public static final int MAX_VALUE = 999;
[Code] ....
I am trying to display two types of table one with initial cost and another one with new cost. Based on the java code here i already have one table but don't know how to display another table.
Attached is the sample output that i am aiming for. The output table for the above code is:
Enter the number of vertices
6
Enter the adjacency matrix
0 4 0 0 -1 0
0 0 -1 0 -2 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 -5 0 3
0 0 0 0 0 0
Enter the source vertex
1
distance of source 1 to 1 is 0
distance of source 1 to 2 is 4
distance of source 1 to 3 is 3
distance of source 1 to 4 is -6
distance of source 1 to 5 is -1
distance of source 1 to 6 is 2
import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
public class logBook {
public static void main(String[] args) throws FileNotFoundException {
File inputFile = new File("C:UsersNick TateDesktopLog.txt");
[Code] .....
So far this is the code I have. It will successfully read the contents of the file(which are below in quotations) and write them to the designated file. My issue is totaling the corresponding costs to their services and then writing that to the file. The if and else if clauses above do not work but how is it that I can get them working?
"John; 67.00; Dinner ; Aug 12 2013;
Bob; 200.00; Conference; Sep 11 2013;
Clara; 450.00; Lodging; Oct 25 2013;
Jamie; 450.00; Lodging; Oct 28 2013;
Rachel; 67.00; Dinner; Nov 11 2013;
Richard; 200.00; Conference; Dec 17 2013;
Nick; 67.00; Dinner; Jan 05 2014;"
This is supposed to get a certain number of items, and then calculate how much every item costs. It adds up the sum of those prices and checks if it is over 150$, if it is, it returns true, if it's not, it returns false.
import java.util.*;
class Cust
{
public static boolean DelPay (int a) {
Scanner reader=new Scanner (System.in);
int b,s=0;
for (int i=1;i<=a;i++) {
b=reader.nextInt();
s=s+b;
}
if (s>150)
return true;
return false;
}
}
I'm trying to write a program that will output the total number of large,medium,and small pizza along with the average cost of an order. I'm stuck on this error , "Else without if" on line 48 else ...medium.
import java.util.Scanner;
public class PizzaOrder
{
public static void main(String[] args)
{
Scanner input = new Scanner (System.in);
double cost,total, average;
String name,response,size,type;
int count,l,m,s;
[code]....
So I have created a array list of pizza toppings, only 4 in total, and each ingredient needs to have a cost property. I'm supposed to access the cost through a get / set method, as the user can create their own pizza and it will total up the cost, but how to.
View Replies View RelatedI am new to java and this is one of my first program assignments. I can't figure out how to make the if else statements work. I am trying to get the input from the user to be multiplied by the package cost but it gives me an error. I also can't figure out how to solve for the discounted total.
Purpose of the program: To write a program that asks the user to enter the number of packages purchased. The program should then display the amount without any discount, the amount of the calculated discount (if any), and the total amount of the purchase after the discount is applied.
What the output should be:
Enter the number of packages purchased: 10
Your total without discount: $990.00
The discount is: $198.00
The discounted total: $792.00
import java.util.Scanner;
public class Practice {
public static void main(String[] args) {
double packageCost = 99.00;
double amtPackage = 10.00;
double withoutDiscount = packageCost * (double) amtPackage;
[Code] .....
I need to create a code for this asign:
Write a program that computes the cost of painting and installing carpet in a room. Assume that the room has one door, two windows, and one bookshelf. Your program must do the following:a. Prompts the user to enter, in feet, the length, width, and height of a room.
A. Read the dimensions of the room.
b. Prompts the user to enter the width and heights, in feet, of the door, each window, and the bookshelf. Read these quantities.
c. Prompts the user to enter the cost, per square foot, of painting the walls. Read these quantities.
d. Prompts the user to enter of cost, per square foot, of installing carpet. Read these quantities.
e. Output the cost of painting the walls and installing the carpet.
Write a program that will calculate the cost of a ticket order and display the receipt for the customer on the screen. There are 2 ticket prices: adult, and senior citizen. Adult seats are $4.50 and senior citizen seats are $3.50. If more than 5 senior citizen tickets are purchased, the customer gets an extra 20% off the of the ticket order. If more than 10 regular seats are purchased, the customer gets an additional 10% off the cost of the order. A customer can only place an order for one type of ticket. Output the type of ticket purchased, the number of tickets purchased, the gross cost, the amount of the discount, and the final cost of the order.
I am having errors with incaompatible varriables comparing float with doubles.
public class lab3 {
static Library myLib;
public static void main (String [] args) {
Library myLib = new Library(); //Instance the Library class
int ticketNum; //Number of Tickets
[Code] .....
I'm trying to create a GUI application that calculates and displays the total cost for certain automotive maintenance services. The application should contain hree classes: 1) the main class that creates and displays the window; 2) a panel for the routine services and 3) a panel for the non-routine services. 2 and 3 are instantiated in 1. I'm pretty positive the error lies in the NonRoutinePanel class because when I comment it out of the main class the program runs fine. But I can't quite figure out which lines of code or methods are causing the problem.
When I try running the program I get these error messages:
Exception in thread "main" java.lang.NullPointerException
at java.awt.Container.addImpl(Container.java:1040)
at java.awt.Container.add(Container.java:958)
at javax.swing.JFrame.addImpl(JFrame.java:540)
at java.awt.Container.add(Container.java:926)
at JoesAutomotiveGUI.<init>(JoesAutomotiveGUI.java:38)
at JoesAutomotiveGUI.main(JoesAutomotiveGUI.java:111)
Here's my code for the three classes:
import javax.swing.*; // Needed for Swing class
import java.awt.*; // Needed for BorderLayout class
public class RoutineMaintenancePanel extends JPanel
{
public final double oilChange = 26.00;// cost of oil change
public final double lubeJob = 18.00;// cost of lube job
[Code] .....
I think I fixed the first error, but now I'm receiving another error in my Net Pay print statement at the end.
Here is what I'm supposed to receive:
Net Pay: 599.86
Here is my sample run:
run-single:
Enter hourly rate in dollars and cents --> 27.16
Enter number of hours and tenths worked --> 37.9
PAYROLL REPORT
Rate: 27.16
Hours: 37.9
Gross Pay: 1029.36
Federal Tax: 257.34
State Tax: 93.41
FICA: 78.75
Net Pay: 771.86
Employer's FICA contribution: 78.75
Employer's UEI and DI contribution: 20.59
Cost to Employer: 1128.70
Enter hourly rate in dollars and cents -->
Here is my updated code:
package assignmentproject1;
/* CHANGE (FINAL) VAR NAMES, SCAN & VERIFY,
ORGANIZE AND PUT FORMULAS ON BOTTOM, ORGANIZE VAR @ TOP, */
import java.util.*;
public class Project1 {
public static void main (String[] args)
[Code] ....
This program is for a swimming pool filling service company. They charge 2 cents per gallon and $50 per hour to fill a pool. The truck can fill at a rate of 730 gallons per hour.
Create the Pool class that calculates the cost to fill a pool based on it's Shape, length, width and depth. (Input order is S L W D)
The pool class will need data fields for String shape, double length, double width, double depth, static double GallonsPerSqFoot = 7.4805, static double price per gallon = .02, static double FillingFeePerHour = 50.0, and static double FillingRate = 730gal/hr.
Create a No-Arg constructor and a constructor that accepts the non-static values, and has the methods: getShape, getLength, getWidth, getDepth, getGallons, getHours, getFillingFeePerHour, getHourlyCost and getTotalCost.
At the end of the class, create a main() method that asks for the input and returns the output based on the Pool class gets.. methods.
The shape options are oblong or rectangle. (A round pool would be oblong with the same width and height, a square pool would have the same width and height)
Formulas:
Rectangle cubic ft = length * width * depth.
Oblong cubic ft= ((Math.PI * Math.pow(width/2,2)* depth) +((length-width) * width * depth))
Gallons = cubic ft * 7.4805.
hours = total gallons/730.
Total cost = (total Gallons * .02)+(hours * $50)
Example Output
An oblong pool 18.00 feet long by 12.00 feet wide and 5.00 feet deep will use 6923.10 gallons of water and take 9.48 hours to fill. The total cost will be 612.65.
Here is my code:
import java.util.Scanner;
import java.util.*;
public class Pool
{
private String poolshape1 = "oblong";
private String poolshape1 = "rectangle";
private double length;
private double width;
private double depth;
private static double GallonsPerSqFoot = 7.4805;
[Code] .....
public class CarV5
{
// private instance variables
String Model1;
int endMiles1, startMiles1;
double gallonsUsed1, pricePerGallon1;
[Code] .....
When I try to compile the program, its telling me that it cannot find the Dist variable in the main method for calcMPG and calcGPM. I'm not sure if the methods are right for the calcGPM or calcMPG.
I moved some static html pages I was hosting from apache into tomcat. (no point in running two servers) This works as expected, but I'm having trouble with the authentication part. In apache the authentication was handled by htaccess. I tried various tutorials on the web about configuring basic authentication in tomcat using WEB-INF/web.xml in tomcat, but I'm not sure this approach applies to static html pages. Using basic authentication for static html in tomcat?
View Replies View RelatedMy code is supposed to give the array index on the left and what is inside the array on the right, but i get nothing except the header? I am using eclipse.
public class Options{
public static void main(String args[]) {
System.out.println("Index Value");
int value[] = {1,2,3,4,5};
for(int add = 0 ; add <value.length ; add++) {
System.out.println(add + " " + value[add]);
}
}
}
What's wrong with the code.
public class alltheprime {
public static void main(int a) {
int i, j, k, l, m;
m=a;
k=0;
for(i=2;m>1;i++) {
for(l=2; l<i;) {
l=l+1;
[Code] ......
I am new to the java computer programming world. i am having basic trouble making the statement full and complete. i am trying to get it to say "The speed of the car is <answer> ft/sec" i have tried reading in the my programming book from school but it doesn't tell me how to fix it. the errors I am getting :
cannot find symbol
I have this error twice ....
I am new to programming so for loops are a little confusing to me still but basically what I am doing is making a small java rpg game and I want to add in a time element to it so your character gets things like promotions and such after a certain amount of time playing.
for (int x = months; x < 12; years++) {
for (int y = weeks; y < 4; months++) {
for (int z = days; z < 7; weeks++) {
for (int j = hours; j < 24; days++) {
for (int k = minutes; k < 60; hours++) {
}
}
}
}
}
That's what I have so far but I am getting a logical error/ infinite loop when I run. I have added each unit of time as a static variable so there's no problem there.
how I would go about having a moving sprite on a page, such as a virtual pet kind of thing. I've tried searching for it through the years and I've tried it with what I know on my own, but things just act up every time. Either:
A.) The sprite moves (respondent to key strokes, of course), but leaves a trail of its image behind itself.
B.) The background image writes, but for some reason the second image does not write, or is lost behind the background.
I'm sure these are simple issues for most of you, but I've tried going about this for a while now with no luck. What I'm trying to do I'm trying to write a virtual pet game, and I would eventually love to make it move around randomly like an A.I. that's pathfinding, but I've got ideas about that, just I need to know how to make it move period first, everything else I think I could figure out on my own.
I am setting up a standalone JNDI and loading a Datasource to the JNDI. DataSource I use is:
org.apache.commons.dbcp.BasicDataSource
The JNDI is set up as follows
String detectorHost = InetAddress.getLocalHost().getHostName();
System.out.println("detectorHost: " + detectorHost);
System.setProperty(Context.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");
final NamingBeanImpl namingInfo = new NamingBeanImpl(); namingInfo.start();
[Code] ....
I get the following exception
javax.naming.CommunicationException [Root exception is java.io.NotSerializableException: org.apache.commons.dbcp.BasicDataSource] at org.jnp.interfaces.NamingContext.bind(NamingContext.java:677) at org.jnp.interfaces.NamingContext.bind(NamingContext.java:611) at javax.naming.InitialContext.bind(Unknown Source) at com.lombardrisk.reform.integration.ReformIntegration.createJNDIServer(ReformIntegration.java:93)
[Code] ....
I don't quite follow why I am getting a NotSerializableException exception, this is a local JNDI in the same JVM and not a remote JNDI. Not sure why this occurs.