numberformatexception

NumberFormatException when trying to compile a simple java program

NumberFormatException when trying to compile a simple java program
This is my code:public class RetailMarket { public static void main(String[] args) throws IOException { int i,ch1,ch2,type,total=0,kg=0; System.out.println("What would you like to buy::"); System.out.println("(1)Grains (2)Oil"); Buffer

How to catch java.lang.NumberFormatException.forInputString Exception in Controller?

How to catch java.lang.NumberFormatException.forInputString Exception in Controller?
I have a checkbox in my JSP page that accepts integer values:<form:checkbox path="somePath" value="2" /> Dangerous Checkbox <br />If the user changes the value of the input to aStringvalue, e.g.:<form:checkbox path="

Getting numberFormatException Invalid Double

Getting numberFormatException Invalid Double
I am putting a numerical value in anEditText. Suppose i am getting the input first say "input". then doingtoString()the input. ThenparseDouble()that. Say the result is input*2. So i am then setting that in theEditText. Suppose,package com.hasibs

How to convert from string to integer? Keep getting NumberFormatException using valueOf();

How to convert from string to integer? Keep getting NumberFormatException using valueOf();
I'm trying to convert a string to an Integer (not primitive int) before I store it in aStack<Integer>, but I keep getting aNumberFormatExceptionif I use this syntax:String element = "5 "; System.out.println(Integer.valueOf(element));Could

Handling exceptions in Java: How to reject int?

Handling exceptions in Java: How to reject int?
I'm having a problem handling exceptions. Honestly, I really don't understand how it works since I self study.I'm working with a program where there would be a main menu with the following choices.Odd/Even - asks an integer input from user and identi

Got a NumberFormatException while trying to parse a text file for objects

Got a NumberFormatException while trying to parse a text file for objects
While trying to create objects and add them to an ArrayList using data from a text file, the program threw a NumberFormatException and I have absolutely no clue why, everything seemed OK to me. Here's the method in which the exception occurred:static

Try/Catch statement not catching exceptions

Try/Catch statement not catching exceptions
I'm trying to use a try/catch statement inside an inner class of an actionlistener but it does not catch the exceptions even when I deliberately trigger them. Here is the code excerpt:btnPerformCalculation.addActionListener(new ActionListener() { @Ov
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