input « Integer « Java Data Type Q&A

1. Input 5 integers using StringTokenizer

Below is the partial code.

import java.util.*;
public class inputting {
public static void main(String[] args) throws IOException {
    // TODO Auto-generated method stub
    int i,j;


2. How Do I Safely Scan for Integer Input?

Scanner scanner = new Scanner();
int number = 1;

        option = scanner.nextInt();

3. smart way to check that input is integer

I think you want to check the input is a list of integers separated by space. Checking char one by one is not sufficient. it doesnt catch the case of [12 --13 14] I would suggest you split the string into a string array and check them one by one. the following method should return true for list [12 13 -14 ...

4. User input verification..must be integer.

Hi, I have a rather simple delema. How do I check if the command line argument is of integer type without using try catch? I would like to test this with an if statement. The command line arguements are stored in an array. Is it somthing like this: if args[1] != (this is where I'm stuck. Hoe do I specify check ...

5. How to take user input as integers?

6. handling a null input argument in a method which returns an int

It really depends what your requirements are. If 0 is a value that could be a valid value that comes from the computation, it is probably a bad approach. If you resign from throwing an exception, agree on an error value and document it. If you do use Exceptions, document the exeption as being thrown when there is no value available. ...

7. how do i specify an integer input by the user? (been doing java for only 2 days)

hello, my friends. i know this is a stupid question, but how do i specify an int input by the user? i need the user to specify the value of a variable, but i don't know how to do that... it's for this thing that rates your awesomeness (if you want to download it than go ahead lol) Java Code: public ...

8. program crash when input isn't int

9. Get integer input

10. storing input in an int.

11. input integer and send to function

hi, im trying to let user input a number, and send this number to my isPrime(num0 function.. my problem is i got this error : - unexpected type required: variable found : value i guess it's my void main input output.. :- import*; public class PrimeNumber { // This method tests whether a given number is prime or not. public ...

12. get an int input from user

System.out.println("Enter number") im trying to retrieve the number during running the program i know in C++ its cin>>x; how is it done in java ??? I have tried int input = Integer.parseInt(args[0]); but that wont work becuase in this way im not allowing the user to enter multiple number while the program is running so basically .. what is : cin>>x ...

14. Prime factorization of an input integer

Hello, I am having issues with my code not printing correctly. I cannot figure out where to put the print statement. My code is doing the following: Enter an integer: (user inputs an integer, let's say it's 30). My program outputs that the prime factorization is 2*3*5* I do not want to the extra "*" at the end, but since my ...

15. getting an integer from an input box

the title pretty much covers it, i basically need to assign an integer value given from and input box to a variable. i have search for example of this, but only found examples for returning strings, i tried to adapt it, but i couldnt figure it out. can anyone please give me an exampel of a simple (very simple) input box ...

16. Complete Noob! Accepting INT inputs from user??

if ((num1 == num2) && (num1 == num3)) { JOptionPane.showConfirmDialog (null, "EQUALATIRAL"); } if (((num1 == num2) && (num1 != num3)) || ((num1 == num3) && (num1 != num2)) || ((num2 == num3) && (num2 != num1))) { JOptionPane.showConfirmDialog (null, "ISOCELES!"); } if ((num1 != num2) && (num1 != num3) && (num2 != num3)) { JOptionPane.showConfirmDialog (null, "SCALENE"); }

17. How to determine if the input is an integer?

There are a number of ways depending on what your goal is. You can use Integer.parseInt (or Float.parseFloat etc) to parse primitive values out of Strings. These throw exceptions when it fails. You can look at each character in a String and determine if they are numbers. You can do something with Scanner. What is "input"?

18. Error numberFormat when integer part of input is more than Max fraction

return adpdec; } Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1,009.8889" at sun.misc.FloatingDecimal.readJavaFormatString( at java.lang.Double.valueOf( at java.lang.Double.( at quadfit.GUI.setNoDP( at quadfit.GUI$60.actionPerformed( at javax.swing.SwingUtilities.notifyAction( at javax.swing.JComponent.processKeyBinding( at javax.swing.KeyboardManager.fireBinding( at javax.swing.KeyboardManager.fireKeyboardAction( at javax.swing.JComponent.processKeyBindingsForAllComponents( at javax.swing.JComponent.processKeyBindings( at javax.swing.JComponent.processKeyEvent( at java.awt.Component.processEvent( at java.awt.Container.processEvent( at java.awt.Component.dispatchEventImpl( at java.awt.Container.dispatchEventImpl( at java.awt.Component.dispatchEvent( at java.awt.KeyboardFocusManager.redispatchEvent( at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent( at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent( at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions( at java.awt.DefaultKeyboardFocusManager.dispatchEvent( at java.awt.Component.dispatchEventImpl( at java.awt.Container.dispatchEventImpl( at ...