Below program illustrates how to reverse a String in Java using recursion:

public class ReverseStringUsingRecursion {
 
	public static void main(String[] args) {
		String s = "abcd";
		System.out.println(reverseUsingRecursion(s));
	}
	
	private static String reverseUsingRecursion(String s) {
		if(s == null || s.length() <=1) {
			return s;
		}
		return reverseUsingRecursion(s.substring(1)) + s.charAt(0);
	}
 
}