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Java 9 Regular Expressions Example

1. Introduction In this example we will explore the java.util.regex package and the abstractions contained within it that facilitate the usage of regular expressions in Java 9. Even though the common String class exports an assortment of “regex” convenience methods (eg: matches(...) & contains(...)) they are implemented in terms of the java.util.regex package and thus the focus will be on said package and ...

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java.util.regex.PatternSyntaxException Example

In this example we will discuss about java.util.regex.PatternSyntaxException. This exception is thrown when a regex (a regular exception) pattern is not correct, i.e. has syntax errors. The PatternSyntaxException extends IllegalArgumentException, which means that an argument passed to a method is illegal or inappropriate. Just like IllegalArgumentException, PatternSyntaxException is a runtime exception (indirect subclass of RuntimeException). This means that the try-catch ...

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