se help me with the below using java

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Please help me with the below using java
5 THE "PAIRED" LETTER PROBLEM
Write a recursive method to count the number of "paired" letters in a string entered by
the user. A "paired" letter set is one in which a letter is separated by one other letter
from another instance of itself (i.e. "RxR" is one pair because R is separated from itself by
one other letter. "RXRxR" is three pairs as R is separated from itself by one letter 2
times and x is separated by itself 1 time by a letter other than itself).
Transcribed Image Text:5 THE "PAIRED" LETTER PROBLEM Write a recursive method to count the number of "paired" letters in a string entered by the user. A "paired" letter set is one in which a letter is separated by one other letter from another instance of itself (i.e. "RxR" is one pair because R is separated from itself by one other letter. "RXRxR" is three pairs as R is separated from itself by one letter 2 times and x is separated by itself 1 time by a letter other than itself).
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