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Tip: Escape Characters in Regular Expressions

Learn how escape special characters in regular expressions.


In Java, characters as <([{\^-=$!|]})?*+.> cannot appear in a regular expression without being escaped.

For this, rely on the Pattern.quote() method as in the following example:

public static boolean contains(String t1, String t2) { 
return t1.matches(Pattern.quote(t2)); 

Now t2 can contain special characters.


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Octavia Andreea Anghel is a senior PHP developer currently working as a primary trainer for programming teams that participate at national and international software-development contests. She consults on developing educational projects at a national level. She is a coauthor of the book "XML Technologies--XML in Java" (Albastra, ISBN 978-973-650-210-1), for which she wrote the XML portions. In addition to PHP and XML, she's interested in software architecture, web services, UML, and high-performance unit tests.
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