In Project#3 you read in lines from a file and tested each to see if it was a palindrome or not. In this Lab you will take your working solution from that assignment and transplant your code into a boolean method named isPalindrome(). As usual you are given a starter file with the main written. This time you will add your code inside the isPalindrome methods that is just an empty shell.

The expected output for Lab#4 is IDENTICAL to what Project#3 produced. The only difference is that your main program will call your boolean method isPalindrome() to determine whether the line is to be printed or not.

// Lab4.java Starter File Uses a method to print only palindromes from a text file

import java.io.*; // BufferedReader

import java.util.*; // Scanner

public class Lab4

{

public static void main (String args[]) throws Exception // i.e. the input file you put on cmd line is not in directory

{

// ALWAYS TEST FIRST TO VERIFY USER PUT REQUIRED INPUT FILE NAME ON THE COMMAND LINE

if (args.length

{

System.out.println(" usage: C:\\> java Lab4 "); // i.e. C:\> java Lab4 L4input.txt

System.exit(0);

}

Scanner infile = new Scanner( new File(args[0]) ); // we read our text file line by line

while( infile.hasNextLine() )

{

String line = infile.nextLine();

if ( isPalindrome(line) )

System.out.println(line);

}

infile.close();

} // END MAIN

// RETURNs true if and only if the string passed in is a palindrome

static boolean isPalindrome( String line )

{

CODE GOES HERE

return false; // Just to make it compile. You change as needed

}

} // END LAB4 CLASS

Command Prompt C: \Users\tim\Desktop\lab-04 solution>java Lab4 L4input.txt Madam I mAdam Stanley Yelnats wow radar wow palindromic cimordnilap C: \Users\tim\Desktop\lab-04\solution