How to Get Substring in Java

Disclaimer/Disclosure: Some of the content was synthetically produced using various Generative AI (artificial intelligence) tools; so, there may be inaccuracies or misleading information present in the video. Please consider this before relying on the content to make any decisions or take any actions etc. If you still have any concerns, please feel free to write them in a comment. Thank you.
---

Summary: Learn how to extract substrings from strings in Java using the substring method. This comprehensive guide covers various examples and use cases to help you understand substring manipulation in Java.
---

Java provides a convenient way to extract substrings from strings using the substring() method. This method allows you to obtain a portion of a string, starting from a specified index and optionally ending at another index. Understanding how to use the substring() method can be valuable for tasks such as data parsing, text processing, and manipulation. Let's explore the syntax and various examples to grasp the concept thoroughly.

Basic Syntax:

The substring() method in Java has two overloaded forms:

Substring with One Parameter:

[[See Video to Reveal this Text or Code Snippet]]

This form returns a substring that starts from the specified startIndex and extends to the end of the original string.

Example:

[[See Video to Reveal this Text or Code Snippet]]

Substring with Two Parameters:

[[See Video to Reveal this Text or Code Snippet]]

This form returns a substring that starts from the startIndex and ends just before the endIndex.

Example:

[[See Video to Reveal this Text or Code Snippet]]

Examples:

Example 1: Extracting Substring from the Beginning

[[See Video to Reveal this Text or Code Snippet]]

Example 2: Extracting Substring from the Middle

[[See Video to Reveal this Text or Code Snippet]]

Example 3: Extracting Substring from the End

[[See Video to Reveal this Text or Code Snippet]]

Example 4: Handling String Index Out of Bounds Exception

[[See Video to Reveal this Text or Code Snippet]]

Example 5: Extracting Last N Characters

[[See Video to Reveal this Text or Code Snippet]]

In the above examples, we've covered extracting substrings from various positions within a string. It's important to note that the startIndex is inclusive, while the endIndex is exclusive. Additionally, you should handle StringIndexOutOfBoundsException when working with dynamic indices to avoid runtime errors.

Understanding how to extract substrings in Java is a fundamental skill that can enhance your ability to manipulate strings effectively. Whether you're working on algorithms, data processing, or text parsing, mastering substring manipulation can significantly improve your programming capabilities.