How Can I Use `String.split()` with Multiple Delimiters in Java?

Utilizing String.split() with Multiple Delimiters

When working with strings in programming, it is often necessary to split them into substrings based on specified delimiters. This question demonstrates a common scenario where splitting should occur at multiple delimiter points.

Problem:

The objective is to split the string "AA.BB-CC-DD.zip" using both the hyphen (-) and dot (.) as delimiters, resulting in the following output:

AA
BB
CC
DD
zip

However, the provided code fails to achieve this due to an oversight in the delimiter pattern.

Solution:

The error lies in the delimiter pattern used:

String[]tokens = pdfName.split("-\.");

To split based on either delimiter, a logical OR operator (|) must be used. The corrected pattern should be:

String[]tokens = pdfName.split("-|\.");

With this modification, the code will now correctly split the string as desired.

The OR operator (|) is a crucial concept in regular expressions, allowing for matching based on multiple patterns. By inserting the OR operator between the dash and dot patterns, the modified code effectively specifies that the split should occur wherever either a dash or a dot is encountered.

By understanding the mechanics of regular expressions and effectively utilizing logical operators, you can efficiently achieve complex string manipulation tasks, such as splitting based on multiple delimiters.

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