The document describes a Java method that accepts a string of two lowercase letters and returns the letter midway between the two letters in the alphabet. It does this by taking the average of the ASCII values of the letters and casting it back to a character. The code provided implements this method along with sample test cases showing it returns no middle character if the letters are the same or consecutive, and otherwise returns the expected midway letter.

1. Implement a method named letter that accepts a lowercase String of 2 letters. The method will
return the letter that is midway between them. Example: if the String is "am" the return would
be g (which is the letter midway between a and m).
Solution
/* java code to find middle character between two character */
import java.util.*;
import java.util.Scanner;
public class Midway
{
public static char mid(char start, char end)
{
int s = (int)start;
int e = (int)end;
int ascii = (s+e)/2;
char character = (char)ascii;
return character;
}
public static void main(String[] args)
{
// input string
Scanner sc=new Scanner(System.in);
System.out.print("Enter lowecase string of 2 letters: ");
String letters = sc.next();
// determining the two characters
char start = letters.charAt(0);
char end = letters.charAt(1);

2. if((int)start == (int)end)
System.out.println("Both characters aree Equal No middle character found ");
else if((int)start+1 == (int)end || (int)end+1 == (int)start )
System.out.println("No middle character found ");
else
{
char middle_character = mid(start,end);
System.out.println("Middle character is " + middle_character + " ");
}
}
}
/*
Output :
Enter lowecase string of 2 letters: aa
Both characters aree Equal
No middle character found
Enter lowecase string of 2 letters: ab
No middle character found
Enter lowecase string of 2 letters: ba
No middle character found
Enter lowecase string of 2 letters: ac
Middle character is b
Enter lowecase string of 2 letters: am
Middle character is g
*/