How Can I Remove Non-Numeric Characters from a Java String While Preserving Decimals?

Removing Non-Numeric Characters while Preserving Decimals in Java Strings

Removing all non-numeric characters from a string can be useful in various scenarios. However, methods like Character.isDigit() may overlook the decimal separator, resulting in loss of important data.

To address this issue, consider employing a regular expression-based approach. The regular expression "[^\d.]" matches any character that is not a digit (0-9) or a decimal point (period).

For instance, given the string "a12.334tyz.78x", the following code snippet will effectively purge all non-numeric characters, preserving the decimal separators:

<code class="java">String str = "a12.334tyz.78x";
str = str.replaceAll("[^\d.]", "");</code>

After executing the above code, str will contain the modified string "12.334.78", where all letters and special characters are eliminated, while the decimal separators remain intact.

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