Subtract One User Inputted Integer From Another - Bad Operand Types
Mar 6, 2014
I've been working on this problem for a while now and continue to get an error when I try to subtract one user inputted integer from another. It seems to compile fine for adding, dividing, and multiplying. Why it might be making that error and how to resolve it? (As an aside, I have no idea if I did the whole program right but am just trying to figure out why a declared int would come back with an error it's a string.)
import java.util.Scanner;
public class Calculate2
{
public static void main(String[] args)
{
int firstInt;
int secondInt;
int choice;
So I cant figure out why my output for my for loop isn't working properly. So the output for the square comes out right but the for loop isn't working properly for the H. I have tried to figure it out and it should go to the next line but its not.
import java.util.Scanner; public class Random { public static void main(String [ ] args) {
The purpose of this program is to translate a user inputed sentence into morseCode. It seems like everything is right to me, but I'm simply not getting output! What am I doing wrong, or what should I add/change?
Here is the main class:
public class MorseCode { public static String myInput; public static String[] myMorse; public static String myUserInput; public static char[] myAlph = {'A','B','C','D','E','F','G','H','I','J','K','L','M', 'N','O','P','Q','R','S','T','U','V','W','X','Y','Z'}; public MorseCode()
I am writing a program that is supposed to take 3 numbers inputted by the user and sorting them out in an ascending order. I believe my code is correct but can't figure out why the program isn't behaving as expected.
import java.util.*; //Required to use the scanner console public class Week3_Programming_Problem { static Scanner console = new Scanner(System.in); //Allows for user input
In my account driver I am trying to get the user inputted account number to get the account by account number. In my code
System.out.println("Which Account number: "); int account = scan.nextInt(); ac.get(account-1);
This works if my accounts are numbered incrementally starting with one, I want it to match the inputted account number
System.out.println("Account number: "); int num = scan.nextInt();
I am thinking a for loop is probably needed. Here is my code:
public class AccountDriver { public static void main(String[] args) { Scanner scan = new Scanner(System.in); ArrayList<Account> ac = new ArrayList<>(); boolean more=true; boolean again=false;
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.
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();
I am trying to remove the duplicate elements from ArrayList using .contains() if elements are primitive datatype it works but user-defined datatype does not work.
public class UserBean { String name; String address; public String getName() { return name;
public static void main (String [] args) { int a = (int) 0.25; int b = (int) 1.25; int result = a + b; System.out.println("Result of addition is "+ result); } }
import java.util.Scanner; import java.util.Stack; public class stack { public static Integer evaluate(String expression) { Scanner scanner = new Scanner(expression); Stack <Integer> operands = new Stack<Integer>();
[Code] ....
When I input my expression which has spaces between characters e.g.:10 2 8 * + 3 -, it worked; when I put expression which may not add space between each char e.g.: 3 14+2*7/, the error showed:
Enter a postfix expression: 3 14+2*7/ Exception in thread "main" java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at java.util.Stack.pop(Stack.java:84) at hw9.stack.evaluate(stack.java:22) at hw9.stack.main(stack.java:45)
System.out.print("To begin, please enter 1 to choose stand tickets or 2 to choose terrace tickets for your party. "); int standOrTerraceTickets = aScanner.nextInt(); while (standOrTerraceTickets != 1 && standOrTerraceTickets != 2) { System.out.print("Invalid input. Please enter 1 for stand tickets or 2 for terrace tickets. "); standOrTerraceTickets = aScanner.nextInt(); }
Okay I thought I had this working properly so that when the user entered anything other than 1 or 2 they would keep getting an error invalid input, however, that only works when the user enters an integer. If the user enters anything other than a number, the program crashes. How does one prevent this from happening?
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.
The exercise sounds like this : Write a program that prompts the user to enter an integer from 1 to 15 and displays a pyramid , as shown in the following sample run (my code displays correctly the first 9 lines):
The problem is when i input a number greater then 9 as it requires 2 spaces . I m pritty sure i solved it incorrectly or at lost not optimal as i m using a string that decreases on each line to create the pyramid effect.
import java.util.*; public class C5_17 { public static void main(String[] args){ Scanner input = new Scanner(System.in); System.out.println("Enter the number of lines: ");
I am trying to get a user to enter an integer (registration number) between 500 and 5000. if it is below 500 and over 5000 the user should get a prompt "invalid number" and "non-numeric character". See my code below. it is not working when i enter invalid numbers.
import java.util.*; public class Infomation{ public static void main(String args []) { Scanner in = new Scanner(System.in); System.out.print("Student Number:"); int sn=in.nextInt();
package question.pkg3; import java.util.Scanner; public class Question3 { public static void main(String[] args) { // TODO code application logic here Scanner Luka=new Scanner(System.in); double sum=0;double count=0; int[] a=new int[10];
[code]....
I'm required to write a program that allows the user to enter up to 10 integer grades into an array. Stop the loop by typing in ‐1. Your main method should call an Average method that returns the average of the grades.I There's something wrong with my program , the count always stays 0 and the sum is always 1 less than the actual sum.Sample input and output :
Enter grade 1: 8 Enter grade 2: 9 Enter grade 3: 10 Enter grade 4: 5 Enter grade 5: 8 Enter grade 6: 9 Enter grade 7: -1 output
Average grade is 8.1666666667On line 13 I had count=count+1 ;
Write a program that reads from the user an integer and reduce it by multiplying its non-zero digits. The result of the multiplication is a number which is to be reduced as the initial one. This process continues until an integer of one single digit is obtained. For example:
Your program should display the number obtained in every iteration.
Sample run1 Enter an integer: 64734502 After iteration 1: 20160 After iteration 2: 12 After iteration 3: 2
Sample run2 Enter an integer: 97737999 After iteration 1: 6751269 After iteration 2: 22680 After iteration 3: 192 After iteration 4: 18 After iteration 5: 8
Write a program that prompts the user to input an integer and then outputs both the individual digits of the number and the sum of the digits.
Now I have a code for spacing out the integers, and I have a separate code for adding the digits. But I am not sure how to merge them together. Both of them work independently
Spacing code: import java.util.*; public class SumoftheIntegers { static Scanner console=new Scanner(System.in); public static void main(String []args) { int num1, test, rem; int counter = 0;
[Code]...
Now the sum of the integers code:
import java.util.Scanner; public class sum { public static void main(String[] args) { // Create a Scanner Scanner input = new Scanner(System.in); // Enter amount System.out.print("Enter an integer: "); int integer = input.nextInt();
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);
Write a program that asks the user for an integer andthen prints out all its factors in increasing order. Use a class FactorGenerator with a constructor FactorGenerator(int numberToFactor) and methods nextFactor and hasMoreFactors. Supply a class FactorTester whose main methods reads a user input, constructs a FactorGenerator object and prints the factors.
Here is what I have so far for my main class and tester class
public class FactorGenerator { int factor; int number; int x; FactorGenerator(int numberToFactor) { number = numberToFactor; }
so i'm following a java tutorial from the book and it has a few challenge questions. and i'm stucked on one. i think i just don't understand what is it that its asking me. heres the question, Write a statement that reads a user's input integer into the defined variable, and a second statement that prints the integer. assuming scanner is given, and i checked my heading code is ok.
Scanner scnr = new Scanner(System.in); int userNum = 0; System.out.println("What is the product of 8 time 2"); userNum = scnr.nextInt();
