Validation Loop That Runs Until User Enters A Valid Binary
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;
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.
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;
In my computer science project the program has to end if the user enters 0 as his choice from a menu given to him, so how would I go about ending the program.
I need to receive input from the user, as many times as he wants. tha is done with the while loop. I also need to output the min and the max numbers the user enters, therefore i have the if statememnts. also if the user enters only one value i need to output that one value as the min and the max.
int min =0; int max = 0; int option = JOptionPane.YES_OPTION; while ( option == JOptionPane.YES_OPTION){ String dataString = JOptionPane.showInputDialog("Enter an integer"); int data = Integer.parseInt(dataString);
My question is how can I make the program repeat until the user enters the number 4 to exit?
/** * Write an application for a furniture company; the program determines the price of a table. Ask the user to choose 1 for pine, 2 for oak, or 3 for mahogany. The output is the name of the wood chosen as well as the price of the table. Pine table cost $100, oak tables cost $225, and mahogany table cost $310. Also ask the user to specify a
(1) large table or a (2) small table.
Add $35 to the price of any large table and add nothing to the price for a small table. Display the output. Your program must repeat until the user chooses to exit.
*/ import java.util.Scanner; public class Wood { public static void main(String[] args) { Scanner input = new Scanner (System.in); System.out.println ("Table Prices");
In my cs class, we have to write a program that throws an exception if the user enters a negative number, the program should prompt the user to enter only positive numbers and then let them retype the number. But everytime I throw an exception, my program gets suspended.
What am I doing wrong, or is there no way to continue a program if an exception is thrown? Does the program automatically get suspended when an exception is thrown?
try{ do { N = kb.nextDouble(); if(N<0) { throw new NegativeArraySizeException(); } else j++; } while(j==0); fill.size(N); } catch(NegativeArraySizeException e) { System.out.println("The number you entered must be positive. Please try again."); }
My homework assignment is: Using a do-while statement, write a Java program that continuously requests a grade to be entered. If the grade is less than 0 or greater than 100, your program should display an appropriate message informing the user that an invalid grade has been entered; a valid grade should be added to a total. When a grade of 999 is entered, the program should exit the repetition loop and compute and display the average of the valid grades entered. Run the program on your computer and verify the program using appropriate test data.
When I run it, I don't get the correct average. I know that i'm supposed to enter 999 to exit the loop and to display the average, but 999 is being added with the loop. I'm not sure how to make it not do that.
//stephanie import java.util.Scanner; public class gradeAverage { public static void main(String[] args)
I am writing a code in which a user inputs data as a string and that data must be verified as a valid number. A valid number is anything from 0-100. Then all valid numbers are converted into double numbers.
I am having trouble in how to write the validation part of the code.
Is it suppose to be an if, else statement? And if so how is it suppose to be validated?
I have a Registration Form in which I am registering user to perform some sort like Entering messages I want to perform some Server Side validation.
Like suppose a user has Enter an Id then as soon as he start entering the Id then I want that this Id should be checked in database that if this Id exists in database or not.
and similar types of validation I want to apply on other fields to.
I having problem on validating email and password whether does it belongs to a registered members or not. I'm using NetBeans and created a database, table name as members. I have done setting up connection pool and fill in data to my members table.This is my members table data.
My homework is asking me to write a program that prompts the user to enter a password and displays "valid password" if the rule is followed or "invalid password"
Sample enter a string for password: wewewx valid password
It's being graded on Design of my GUI Dialog box User friendliness Creativity
My current issues with the current code I have written is simply the password doesn't work unless it starts with 2 digits, the other order it displays as wrong. and I have no idea how to add a GUI.
I am new to java and programming in general. I figured out how to convert an integer input to binary however I am having issues doing the opposite of converting a user input binary number to a decimal.
I need to do this with basic math (or string depending on how I represent the binary) and no functions.
I know how to convert binary to integer on paper but I am having a hard time working it out in java.
I am designing a program in-order convert Binary to Decimal values with added features:
Rejecting binary values longer than 32 bits
Prompting the user to make multiple entries after completing the binary to decimal conversion of their first entry. I was trying to code this in Nested For Loops, but I don't know if I've really done that.
Here is what i have so far.
public class BinaryToDecimal { public static void main(String[] args){ Scanner scan = new Scanner(System.in); String binary; int decimal=0b10, i, rem; boolean isBinary = true;
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?
trying to write a program that takes a user inputted number and converts it to a binary number.
Here's what I have:
package com.java2novice.algos; import java.util.Scanner; public class Converter { static Scanner console = new Scanner(System.in); public void printBinaryFormat(int number){ int binary = console.nextInt();
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 = '@';
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));
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
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'?
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?
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)
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++){
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;
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<>();
