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PalindromeIgnoreNonAlphanumeric.java
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executable file
·60 lines (58 loc) · 1.66 KB
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/* */ package ch10;
/* */
/* */ import java.util.Scanner;
/* */
/* */
/* */ public class PalindromeIgnoreNonAlphanumeric
/* */ {
/* */ public static void main(String[] args) {
/* 9 */ Scanner input = new Scanner(System.in);
/* */
/* */
/* 12 */ System.out.print("Enter a string: ");
/* 13 */ String s = input.nextLine();
/* */
/* */
/* 16 */ System.out.println("Ignoring non-alphanumeric characters, \nis " + s + " a palindrome? " +
/* 17 */ isPalindrome(s));
/* */ }
/* */
/* */
/* */
/* */ public static boolean isPalindrome(String s) {
/* 23 */ String s1 = filter(s);
/* */
/* */
/* 26 */ String s2 = reverse(s1);
/* */
/* */
/* 29 */ return s2.equals(s1);
/* */ }
/* */
/* */
/* */
/* */ public static String filter(String s) {
/* 35 */ StringBuilder stringBuilder = new StringBuilder();
/* */
/* */
/* 38 */ for (int i = 0; i < s.length(); i++) {
/* 39 */ if (Character.isLetterOrDigit(s.charAt(i))) {
/* 40 */ stringBuilder.append(s.charAt(i));
/* */ }
/* */ }
/* */
/* */
/* 45 */ return stringBuilder.toString();
/* */ }
/* */
/* */
/* */ public static String reverse(String s) {
/* 50 */ StringBuilder stringBuilder = new StringBuilder(s);
/* 51 */ stringBuilder.reverse();
/* 52 */ return stringBuilder.toString();
/* */ }
/* */ }
/* Location: /Volumes/TXS.128G/hope useful/practice/2020.jar!/ch10/PalindromeIgnoreNonAlphanumeric.class
* Java compiler version: 8 (52.0)
* JD-Core Version: 1.1.3
*/