Java 检查字符串是否为回文字符串
检查字符串是否为回文字符串
实例源码：
源代码：
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/* 2
*来 自3
nowjava.com - 时代Java4
*/5
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public class Palindrome {7
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public static boolean isPalindrome(String stringToTest) {10
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String workingCopy = removeJunk(stringToTest);12
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String reversedCopy = reverse(workingCopy);14
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return reversedCopy.equalsIgnoreCase(workingCopy);17
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}19
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protected static String removeJunk(String string) {22
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int i, len = string.length();24
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StringBuilder dest = new StringBuilder(len);26
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char c;28
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for (i = (len - 1); i >= 0; i--) {31
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c = string.charAt(i);33
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if (Character.isLetterOrDigit(c)) {/*from N o w J a v a . c o m - 时代Java*/35
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dest.append(c);37
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}39
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}41
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return dest.toString();44
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}46
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protected static String reverse(String string) {49
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StringBuilder sb = new StringBuilder(string);51
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return sb.reverse().toString();54
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}56
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public static void main(String[] args) {59
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String string = "Madam, I'm Adam.";61
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System.out.println();64
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System.out.println("Testing whether the following "66
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+ "string is a palindrome:");68
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System.out.println(" " + string);70
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System.out.println();72
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if (isPalindrome(string)) {75
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System.out.println("It IS a palindrome!");77
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} else {79
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System.out.println("It is NOT a palindrome!");81
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}83
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System.out.println();85
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}87
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}89
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/*92
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* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.94
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*96
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* Redistribution and use in source and binary forms, with or without98
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* modification, are permitted provided that the following conditions100
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* are met:102
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*104
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* - Redistributions of source code must retain the above copyright106
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* notice, this list of conditions and the following disclaimer.108
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*110
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* - Redistributions in binary form must reproduce the above copyright112
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* notice, this list of conditions and the following disclaimer in the114
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* documentation and/or other materials provided with the distribution.116
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*118
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* - Neither the name of Oracle or the names of its120
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* contributors may be used to endorse or promote products derived122
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* from this software without specific prior written permission.124
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*126
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS128
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,130
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR132
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR134
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