Finding the largest and the smallest number among three input numbers can be done with the help of ternary operator in java. The program code is given below.

 
package program3;
import java.io.*;
public class Program3 {
    public static void main(String[] args)throws IOException {
        int a, b,c,l,s;
        BufferedReader br= new BufferedReader (new InputStreamReader(System.in));
        System.out.println("Enter first number");
        a=Integer.parseInt(br.readLine());
        System.out.println("Enter second number");
        b=Integer.parseInt(br.readLine());
        System.out.println("Enter third number");
        c=Integer.parseInt(br.readLine());
        l=a> b ? (a > c ? a : c) : (b > c ? b : c) ;
        s=a< b ? (a < c ? a : c) : (b < c ? b : c) ;
        System.out.println("Largest number is "+l);
        System.out.println("Smallest number is "+s);
    }
}

This will produce the following output:

Enter first number

22

Enter second number

43

Enter third number

90

Largest number is 90

Smallest number is 22