How to Replace Non-Printable Unicode Characters in Java?

Replacing Non-Printable Unicode Characters in Java

In Java, the provided regular expression patterns can replace ASCII control and non-printable characters. However, they fail to handle Unicode strings effectively.

Enhanced Regular Expression Pattern for Unicode

To address this limitation, a modified pattern can be employed, which targets the Unicode category of "Other":

<code class="java">my_string.replaceAll("\p{C}", "?");</code>

The category "Other" (\p{C}) encompasses a wide range of non-printable characters, including control characters, format characters, and surrogate code points. This pattern effectively removes these characters from Unicode strings.

Additional Information

For a more comprehensive understanding, it is recommended to explore the Unicode regular expressions available in the java.util.regexPattern/String.replaceAll support. These expressions provide a robust mechanism for manipulating and modifying Unicode strings.

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