Airplane Seat Reservations - Loop Until User Hits 0
Nov 11, 2014
I'm writing a classic airplane seating program. The program runs fine except for two things:
1) I want the user to exit the program when 0 is inputted (program also quits when all seats are reserved - this works fine already). Now the program quits when user hits blank line with enter. How to fix this and make 0 the exit key?
2) I would like for there to be a line below the seating chart saying that there are XX number of seats available. When user makes reservations, the line should update every time under the seating chart saying that there are such and such number of seats available. How to implement this?
import java.util.*;
public class OmaAirplane {
public static void main(String[] args) {
System.out.println("Welcome to the seat reservation system!");
char[][] seats = new char [8][6];
ArrayList<String> reservedSeats = new ArrayList<>();
for (int i=0;i<8;i++){
[code]....
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Nov 11, 2014
I'm writing a classic airplane seating program. The program runs fine except for two things:
1) I want the user to exit the program when 0 is inputted (program also quits when all seats are reserved - this works fine already). Now the program quits when user hits blank line with enter. How to fix this and make 0 the exit key?
2) I would like for there to be a line below the seating chart saying that there are XX number of seats available. When user makes reservations, the line should update every time under the seating chart saying that there are such and such number of seats available. Any pointers on how to implement this?
import java.util.*;
public class OmaAirplane {
public static void main(String[] args) {
System.out.println("Welcome to the seat reservation system!");
char[][] seats = new char [8][6];
ArrayList<String> reservedSeats = new ArrayList<>();
[Code] .....
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Apr 20, 2015
I need to write out code for a seat booking system. So far I have the seats displayed but when I ask the user to enter their seat column and row I don't know how to mark out that specific seat they have booked with an X or such? This is what I've done so far.
import java.util.Scanner;
public class show2
{
public static final int column = 20;
public static final int row = 10;
public static void makeReservations(int[][] seatarray, Scanner input)
[Code] ....
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Feb 24, 2014
import java.util.Scanner;
public class Project_5
{
public static void main (String[] args)
{
Scanner input= new Scanner (System.in);
[code]....
So I'm attempting to have this program take the users input of integers, pressing enter in between each one. If they enter a negative number it lets them know that its invalid. At the end of the program it takes all of the valid integers entered and must add them and average them. I've put the final println in there as a placeholder. If the user types in "6" then presses enter and types in "3" , the output is:
There were 3 valid numbers entered.
The sum of the valid numbers was --- and the average was ---.
There were 0 invalid numbers entered.
It then continues on allowing the user to enter more values. Here is the example output for correct code"
Enter a positive value (EOF to quit): 4
Enter a positive value (EOF to quit): 7
Enter a positive value (EOF to quit): 8
Enter a positive value (EOF to quit): 2
Enter a positive value (EOF to quit): -1
The number "-1" is invalid.
Enter a positive value (EOF to quit): 8
Enter a positive value (EOF to quit): 0
Enter a positive value (EOF to quit): -4
The number "-4" is invalid.
Enter a positive value (EOF to quit): CTRL-D
There were 6 valid numbers entered.
The sum of the valid numbers was 29 and the average was 4.83.
There were 2 invalid numbers.
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May 3, 2015
Okay I am making a class for a reservation project for reservations at a restaurant. So in the end the whole thing has to take reservations, with a GUI and "book" them. For this class of the project I have to add a item to a array (that being name, phone, and so on). I also have to make a sort method.
private static int indexOfMinInRange(Reservations[] a,int low,int high) {
int max=high;
for(int i=high+1;i>=low;i--)
{if()
{max=i;}}
return max;}
[Code] ....
I am working with IndexOfMinInRange method, I don't know whether to set the return type to Reservations, or to set the array in the parameter to Reservations. This is my main problem.
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Oct 21, 2014
I have two files - I can get the second one to populate with the first ones data and then delete the first one. I cannot get it to then rename itself to the name of the first file. It also only hits the 'rename' section of the code providing I place system.gc in otherwise it completely skips it.
the code I use is below:
Java Code:
finally{
try {
br.close();
// mp br.close();
//mp System.gc();
[code]...
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Apr 9, 2014
I cannot get this crappy looking pacman to horizontally flip as he hits the right wall.
Here is my JFrame
package MyPacman;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
[Code] ....
I do not understand how I can alter my paintComponent. Is it possible to set my paintComponent to an Image variable, and then flip the image with Math.Radius?
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May 9, 2014
I need to make a scoreboard that can count how many times a ball hits a moving platform in pong and have no clue how to approach this.
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Jan 21, 2015
Here is my problem to solve : Find the smallest value Write an application that finds the smallest of several integers. Assume that the first value read specifies the number of values to input from the user.
I do not even know where to begin other than creating a scanner for the user input. But how do I take that user inputed number to create the loop?
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Apr 15, 2015
public static void getInput(int [] student, int []test1,int []test2,int []test3,
int [] test4, int [] test5) {
int stuId = 0;
int t1 = 0;
int t2 = 0;
int t3 = 0;
int t4 = 0;
int t5 = 0;
int h = 0;
char answer = '@';
[Code] ....
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Feb 12, 2015
I need to fix a program in which the user must get a three random numbers in a row. They have five chances. This is what i have so far:
public static void main(String[] args)throws IOException {
// TODO code application logic here
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
int num1=(int)(Math.random()*(9-0));
int num2=(int)(Math.random()*(9-0));
int num3=(int)(Math.random()*(9-0));
[Code] ....
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Mar 3, 2014
I am having a problem with code that I've written, the problem occurs when I try to prompt for user input at the end of the first loop. What happens is the println fires but the prompt never does and it exits the loop.
Java Code:
import java.util.Scanner;
public class Lab3test
{
public static void main( String[] arguments )
{
//Variable declaration
[Code] ....
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Mar 29, 2015
I have this program I have to write(attached). I am having problems with what the structure will look like. The following what I have so far. The questions I have are in bold.
>get userInput of how many observations
>for(int i = 1; i <= userInput; i++)
>for(int j = 1; j <= 1; j++)
>use a switch(case) method to ask user to select an option(1,2,3)
>example, user chooses option 1:
>ask to input time
>print displacement
>ask user to stop application(Y/N)
>IF "No" is selected --------->>
How do I continue with the loop if user decides to not quit? -- And do I need to put this in each 'case'?
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Jul 2, 2014
Ask user to enter a name alphabet by alphabet, and print d whole word as output,,,,,, use while loop?Since i am new to JAVA..i have no clue on how to begin?
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Sep 10, 2014
I am still relatively new to java and am working on a lab program. I have already met the requirements and am trying to spice my code up with a loop that prompts the user to say if the program should run again. This is what I have so far:
package lab2;
import java.util.Scanner;
public class OrderedPairTest{
public static void main(String[] args){
boolean retry = true;
while(retry == true){
[code]....
However, it is giving me an error after the user inputs "y" in for the answer to run again. What did I do wrong?
Error code is: Exception in thread "main" java.util.NoSuchElementException: No line found at java.util.Scanner.nextLine(Unknown Source) at lab2.OrderedPairTest.main(OrderedPairTest.java:11)
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Jun 28, 2014
I'm trying to learn Java and my current project is to write a short program to determine the factorial of a number entered by the user. I haven't looked. There may be a method that will do it, but I want to use a for loop specifically.
What I have compiles just fine. I'm actually pretty thrilled just with that. Here is what I have:
class factorial {
public static void main( String[] args) {
Scanner scan = new Scanner(System.in );
int num;
int product = 1;
[Code] ....
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Nov 17, 2014
I'm trying to do a user validation loop that runs until the user enters a valid binary, q, or Q. I think the rest of my program should work as intended, but here is the areas of concern:
public static boolean isBinary(String num) //Check if the entry is binary
{
for(int i = 0; i < num.length(); i++) {
if(num.charAt(i) != 0 || num.charAt(i) != 1){
return false;
[Code] .....
The program runs without errors otherwise.
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Feb 7, 2015
Write a program called RomanNumeralHelper that allows a user to enter a roman numeral and then outputs the integer number value. Use a Scanner to accept command line input from the user and continually ask for a roman numeral until the user enters Q (or q) to stop. Your solution should NOT use a switch statement.
Here is sample input / output:
Enter a roman numeral [Q | q to quit]: III
>> 3
Enter a roman numeral [Q | q to quit]: IV
>> 4
Enter a roman numeral [Q | q to quit]: V
>> 5
Enter a roman numeral [Q | q to quit]: Q
Good Bye!
This is what I have so far in my code, but I cant get what the user inputs when I want it to output the number.
import java.util.Scanner;
public class RomanNumber4
{
public static void main(String[] args) {
// obtain input from command window
Scanner input = new Scanner(System.in);
[Code] ....
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Jan 27, 2015
I am trying to print a loop inside an array of a greater size than the loop itself. Like for example I have an array of size 7 but it has only 3 elements.
int[] array=new int[7]
array[0]=2;
array[1]=3;
array[2]=4;
now what I want to do is print these three numbers in a loop so that my array[3]=2;array[4]=3;array[5]=4 ...... till the last one. Also the array could be any size and not just 7.
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Feb 25, 2014
Here's the code: it's while loop inside a for loop to determine the proper length of a variable:
for (int i = 0; i < num; i++) {
horse[i]=new thoroughbred();
boolean propernamelength = false;
while (propernamelength==false){
String name = entry.getUserInput("Enter the name of horse "
[code]....
I was just wondering what was going on here -- I've initialized the variable, so why do I get this message? (actually the carat was under the variable name inside the parentheses.
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Nov 2, 2014
I have everything else working. My problem is that when i type "quit" to close the outer loop. It still runs the inner loop. The National Bank manager wants you to code a program that reads each clients charges to their Credit Card account and outputs the average charge per client and the overall average for the total number of clients in the Bank.
Hint: The OUTER LOOP in your program should allow the user the name of the client and end the program when the name entered is QUIT.In addition to the outer loop, you need AN INNER LOOP that will allow the user to input the clients charge to his/her account by entering one charge at a time and end inputting the charges whenever she/he enters -1 for a value. This INNER LOOP will performed the Add for all the charges entered for a client and count the number of charges entered.
After INNER LOOP ends, the program calculates an average for this student. The average is calculated by dividing the Total into the number of charges entered. The program prints the average charge for that client, adds the Total to a GrandTotal, assigns zero to the Total and counter variables before it loops back to get the grade for another client.Use DecimalFormat or NumberFormat to format the numeric output to dollar amounts.
The output of the program should something like this:
John Smith average $850.00
Maria Gonzalez average $90.67
Terry Lucas average $959.00
Mickey Mouse course average $6,050.89
National Bank client average $1,987.67
Code:
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String name = "";
int charge = 0;
int count = -1;
int total = 1;
int grandtotal = 0;
int average = 0;
[code]....
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Apr 9, 2014
Write a java program that will ask a user to input grades until the user inputs the sentinel value -1. The program should test each input to determine whether 0<=grade<=100. If the grade entered is within this range, the program should print "Grade accepted;" if not, the program should print "Invalid input".
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Oct 8, 2014
Basically I need to make a program prompts the user for an integer, check to make sure the length entered by the user is a power of 2 and at least 2. Then I need to convert from base e to base 2 then I need to print the tick marks of a ruler based of the value of the length.
I got the whole converting thing working and the check for a power of 2, that wasn't an issue because it didn't require any recursion. I just don't know how to print out the proper tick mark values.
The way it is supposed to work is that it needs to look like this. Say the user enters 8;
012131210
012345678
Or if the user enters 16;
01213121412131210
01234567890123456
The bottom row is pretty much just the index value, that I print fine.
The top row though is supposed to be the length of the ticks on a ruler, with the middle most value being the value of the conversion from base e to base 2 from above. I can get that printed and what I get just looks like this.
For 8;
000030000
012345678
For 16;
00000000400000000
01234567890123456
As you can see I can get the middle value and the index values below but I don't know how to use recursion to get the right numbers.
Here's my current code.
import java.util.*;
public class TickMarks {
public static void main (String args[]){
Scanner input = new Scanner(System.in);
boolean looping = true;
while(looping == true){
System.out.print("Please enter a length: ");
[Code]...
Now the methods isPowerOfTwo() and printLength() both work fine. However, I'm not sure how to get the left and right side working.
My thoughts were to split the length in half and get a left and right side. I gave both of them arrays so I can keep track of the values. Now as you've seen above I get all zeros and I know it's because that's the default value in an array, I just don't know how to get the proper values.
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Nov 4, 2014
I have been struggling with this program for weeks. This program is supposed to take a user's inputted odd number and then print out all prime numbers lower than that number.
public class PrimeNumber
{
Scanner scan = new Scanner(System.in);
int userNum;
String neg;
public void getUserNum()
[code]...
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Mar 8, 2014
How to convert this program from a while loop to a for loop.
import java.util.Scanner;
public class LongDivision {
public static void main(String arguments[]){
Scanner input = new Scanner(System.in);
System.out.println("Enter the dividend: ");
[Code] ....
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