Fixing java.lang.NumberFormatException When Parsing Currency Strings in Java

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Handling Currency Parsing Issues in Java Automation Testing

Understanding the Problem

You may be tasked with extracting a numerical value from a string that contains both a number and a currency symbol. In your case, you have successfully retrieved the string "488.15 EUR" but encountered the following error when you attempted to convert it to an integer:

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The resultant exception is:

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Solution: Steps to Fix the Error

1. Understanding the Content of the String

The first step is to recognize that the string you have is not a straightforward integer. Instead, it includes a decimal value and a currency indicator. The presence of .15 is crucial if you intend to perform accurate arithmetic operations such as subtraction.

2. Extracting the Numeric Part from the String

To successfully parse the number, you need to isolate the numeric part of the string. Here’s how to do that:

Remove Extraneous Characters: You need to strip away the currency symbol and any other non-numeric character from the string. In this case, you will remove the last four characters, which in this case are . EUR.

Here’s the Java code to extract the numeric part:

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3. Using the Appropriate Numeric Type

Next, it's important to use the right numerical type for your calculations. Given that you are working with decimal values, you need to use double instead of int. The double type will preserve the decimal part of your number. Here's how you do that:

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4. Performing the Subtraction Operation

With the suma variable now containing a properly parsed double value, you can proceed to perform your arithmetic operations as intended. For example:

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5. Complete Solution Code

Here’s how your complete code segment might look after applying these changes:

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Conclusion

Feel free to share your experiences or ask questions in the comments below!