Java StringBuffer: Explaining the codePointBefore(int index) Method | Java Tutorial

In this Java tutorial, we dive into the `codePointBefore(int index)` method of the `StringBuffer` class. This method returns the Unicode code point value before the specified index within the `StringBuffer`.

Here's a detailed breakdown of the `codePointBefore(int index)` method:
- **Syntax**: `public int codePointBefore(int index)`
- **Parameters**:
- `index`: The index after which the code point value is to be returned.
- **Return Value**: The Unicode code point value preceding the given index.

**How it Works**:
1. The method takes an index as input.
2. It retrieves the Unicode code point value preceding the specified index in the `StringBuffer`.
3. If the given index is at the beginning of the `StringBuffer`, it throws an `IndexOutOfBoundsException`.

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Java StringBuffer [codePointBefore(int index) method] | Java Tutorial

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