Write a test client which takes a file path as an argument and reads each line one by one. If the current line is valid DNA, print out its complement as well as whether or not it is a Watson-Crick complemented palindrome.

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.Scanner;

public class WCComplement {

  public static boolean palindromeWC(String input){

      if(input==null)

          return false;

      for(int i=0,j=input.length()-1; i<j; i++, j--){

          if(input.charAt(i) != input.charAt(j))

              return false;

      }

      return true;

  }

  public static void main(String[] args) throws IOException {

      Scanner sc = new Scanner(System.in);

      System.out.print("Enter input file name: ");

      String fileName = sc.next();

      FileReader fr = new FileReader(fileName);

      BufferedReader br = new BufferedReader(fr);

      String line;

      while((line = br.readLine()) != null){

          if(palindromeWC(line))

              System.out.println(line+" is Watson-Crick complemented");

      }

      br.close();

      fr.close();

      sc.close();

  }

}

Explanation:

these  signals travel  down a part of the neuron called the axon, which is like a wire that carries the  signal  to othernerve  cells. on average a  nerve  cell sends a  signal  at about 50 meters per second, which is over 100  miles  an hour!