Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "

Question

I am very to new to Java programming and I am taking a class based on Java. I am currently doing this coffee project which is based on boolean and RadioButtons. I believe I am almost done with it except I get this error message on the console. If there is any other mistakes please let me know so I can fix it!

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)

    public void purchase()
    {
        //local variables
        String  quantityString, buttonString, nameString, coffeeType;

        float subTotalFloat, priceFloat, taxFloat, grandTotalFloat;
        int quantityInteger;

        //Format the values to currency format
        DecimalFormat valueDecimalFormat = new DecimalFormat("$#0.00");

        //retrieve the input from the  user
        nameString = nameTextField.getText();
        quantityString = quantityTextField.getText();
        buttonString = coffeeType ();

        //change data types
        quantityInteger = Integer.parseInt(quantityString);
        ...
    }

How do you convert `"1 "` to a number? Why have you posted so much irrelevant code? — Sotirios Delimanolis, Apr 17 '14 at 04:26

score 5 · Answer 1 · answered Apr 17 '14 at 04:29

5

Change your Integer.parseInt(quantityString); to Integer.parseInt(quantityString.trim()); and your code will work fine!

answered Apr 17 '14 at 04:29

Sazzadur Rahaman

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I have changed that code and the error is gone! However, theres no display when I click the Add to Order button. – Warren Xie Apr 17 '14 at 04:43

score 3 · Answer 2 · answered Apr 17 '14 at 04:29

3

You have an additional space in the end. Trim it to remove that spcace.

quantityInteger = Integer.parseInt(quantityString.trim());

answered Apr 17 '14 at 04:29

Abimaran Kugathasan

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I have changed that code and the error is gone! However, theres no display when I click the Add to Order button – Warren Xie Apr 17 '14 at 05:45

score 0 · Answer 3 · answered Apr 17 '14 at 04:32

try this i found an empty space in the console message "Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "(after one there is a space) so try to find if there is any empty space taken into account by mistake, so parserint is trying to parse string + empty space.

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: "1 "

3 Answers3