24 lines
2.9 KiB
Plaintext
24 lines
2.9 KiB
Plaintext
\begin{Verbatim}[commandchars=\\\{\},codes={\catcode`\$=3\catcode`\^=7\catcode`\_=8\relax}]
|
|
\PYG{c+c1}{// class to implement Method 2 }
|
|
\PYG{k+kd}{public}\PYG{+w}{ }\PYG{k+kd}{class} \PYG{n+nc}{IVersusNMinusI}\PYG{+w}{ }\PYG{k+kd}{implements}\PYG{+w}{ }\PYG{n}{PalindromeChecker}\PYG{+w}{ }\PYG{p}{\PYGZob{}}
|
|
\PYG{+w}{ }\PYG{c+c1}{// method 2 - comparing each element at index i to the element at n - i where n is the last index}
|
|
\PYG{+w}{ }\PYG{n+nd}{@Override}
|
|
\PYG{+w}{ }\PYG{k+kd}{public}\PYG{+w}{ }\PYG{k+kt}{boolean}\PYG{+w}{ }\PYG{n+nf}{checkPalindrome}\PYG{p}{(}\PYG{n}{String}\PYG{+w}{ }\PYG{n}{str}\PYG{p}{)}\PYG{+w}{ }\PYG{p}{\PYGZob{}}
|
|
\PYG{+w}{ }\PYG{c+c1}{// looping through the first half of the String }
|
|
\PYG{+w}{ }\PYG{n}{NewPalindrome}\PYG{p}{.}\PYG{n+na}{operations}\PYG{o}{[}\PYG{l+m+mi}{1}\PYG{o}{]++}\PYG{p}{;}
|
|
\PYG{+w}{ }\PYG{k}{for}\PYG{+w}{ }\PYG{p}{(}\PYG{k+kt}{int}\PYG{+w}{ }\PYG{n}{i}\PYG{+w}{ }\PYG{o}{=}\PYG{+w}{ }\PYG{l+m+mi}{0}\PYG{p}{;}\PYG{+w}{ }\PYG{n}{i}\PYG{+w}{ }\PYG{o}{\PYGZlt{}}\PYG{+w}{ }\PYG{n}{Math}\PYG{p}{.}\PYG{n+na}{floor}\PYG{p}{(}\PYG{n}{str}\PYG{p}{.}\PYG{n+na}{length}\PYG{p}{()}\PYG{+w}{ }\PYG{o}{/}\PYG{+w}{ }\PYG{l+m+mi}{2}\PYG{p}{);}\PYG{+w}{ }\PYG{n}{i}\PYG{o}{++}\PYG{p}{)}\PYG{+w}{ }\PYG{p}{\PYGZob{}}
|
|
\PYG{+w}{ }\PYG{n}{NewPalindrome}\PYG{p}{.}\PYG{n+na}{operations}\PYG{o}{[}\PYG{l+m+mi}{1}\PYG{o}{]}\PYG{+w}{ }\PYG{o}{+=}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{p}{;}\PYG{+w}{ }\PYG{c+c1}{// 1 for the getting str.length(), 1 for Math,floor, 1 for checking condition, 1 for incrementing}
|
|
|
|
\PYG{+w}{ }\PYG{c+c1}{// returning false if the digits don't match}
|
|
\PYG{+w}{ }\PYG{n}{NewPalindrome}\PYG{p}{.}\PYG{n+na}{operations}\PYG{o}{[}\PYG{l+m+mi}{1}\PYG{o}{]}\PYG{+w}{ }\PYG{o}{+=}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{+w}{ }\PYG{o}{+}\PYG{+w}{ }\PYG{l+m+mi}{1}\PYG{p}{;}\PYG{+w}{ }\PYG{c+c1}{// 1 for str.charAt(i), 1 for ((str.lenght() -1) - 1), 1 for the other str.charAt(), 1 for checking the condition}
|
|
\PYG{+w}{ }\PYG{k}{if}\PYG{+w}{ }\PYG{p}{(}\PYG{n}{str}\PYG{p}{.}\PYG{n+na}{charAt}\PYG{p}{(}\PYG{n}{i}\PYG{p}{)}\PYG{+w}{ }\PYG{o}{!=}\PYG{+w}{ }\PYG{n}{str}\PYG{p}{.}\PYG{n+na}{charAt}\PYG{p}{((}\PYG{n}{str}\PYG{p}{.}\PYG{n+na}{length}\PYG{p}{()}\PYG{o}{\PYGZhy{}}\PYG{l+m+mi}{1}\PYG{p}{)}\PYG{+w}{ }\PYG{o}{\PYGZhy{}}\PYG{+w}{ }\PYG{n}{i}\PYG{p}{))}\PYG{+w}{ }\PYG{p}{\PYGZob{}}
|
|
\PYG{+w}{ }\PYG{k}{return}\PYG{+w}{ }\PYG{k+kc}{false}\PYG{p}{;}
|
|
\PYG{+w}{ }\PYG{p}{\PYGZcb{}}
|
|
\PYG{+w}{ }\PYG{p}{\PYGZcb{}}
|
|
|
|
\PYG{+w}{ }\PYG{c+c1}{// returning true as default}
|
|
\PYG{+w}{ }\PYG{k}{return}\PYG{+w}{ }\PYG{k+kc}{true}\PYG{p}{;}
|
|
\PYG{+w}{ }\PYG{p}{\PYGZcb{}}
|
|
\PYG{p}{\PYGZcb{}}
|
|
\end{Verbatim}
|