Java StringBuilder codePointBefore(int index) method returns the character (Unicode code point) before the specified index. The index refers to char values (Unicode code units) and ranges from 1 to length().

Java StringBuilder codePointBefore() Method Example

public class CodePointBeforeExample {
    public static void main(String[] args) {
         StringBuilder builder = new StringBuilder("javaguides");
         int unicode = builder.codePointBefore(1);
         System.out.println("the character (Unicode code point) at the before specified index is :: " + unicode);
    }
}

Output:

the character (Unicode code point) at the before specified index is :: 106

Reference

https://www.javaguides.net/2018/08/java-stringbuilder-class-api-guide.html

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