Java 对字符串内的字符进行排序
对字符串内的字符进行排序
实例源码：
源代码：
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public class Anagram {3
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/**来自 5
n o w j a v a . c o m**/6
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/**8
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* Tests whether the passed-in strings are anagrams --10
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* containing the exact same number of each letter.12
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* Punctuation, case, and order don't matter.14
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* 16
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* @return true if the strings are anagrams; otherwise, false18
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*/20
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public static boolean areAnagrams(String string1, String string2) {22
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String workingCopy1 = removeJunk(string1);25
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String workingCopy2 = removeJunk(string2);27
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workingCopy1 = workingCopy1.toLowerCase();30
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workingCopy2 = workingCopy2.toLowerCase();32
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workingCopy1 = sort(workingCopy1);35
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workingCopy2 = sort(workingCopy2);37
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return workingCopy1.equals(workingCopy2);40
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}/*来自 时 代 Java - nowjava.com*/42
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/**45
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* Removes punctuation & spaces -- everything except 47
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* letters from the passed-in string.49
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* 51
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* @return a stripped copy of the passed-in string53
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*/55
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protected static String removeJunk(String string) {57
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int i, len = string.length();59
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StringBuilder dest = new StringBuilder(len);61
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char c;63
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for (i = (len - 1); i >= 0; i--) {66
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c = string.charAt(i);68
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if (Character.isLetter(c)) {70
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dest.append(c);72
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}74
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}76
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return dest.toString();79
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}81
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/** 84
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* Sorts the passed-in string. 86
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* 88
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* @return a sorted copy of the passed-in string90
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*/92
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protected static String sort(String string) {94
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char[] charArray = string.toCharArray();96
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java.util.Arrays.sort(charArray);99
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return new String(charArray);102
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}104
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public static void main(String[] args) {107
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String string1 = "Cosmo and Laine:";109
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String string2 = "Maid, clean soon!";111
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System.out.println();114
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System.out.println("Testing whether the following "116
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+ "strings are anagrams:");118
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System.out.println(" String 1: " + string1);120
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System.out.println(" String 2: " + string2);122
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System.out.println();124
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if (areAnagrams(string1, string2)) {127
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System.out.println("They ARE anagrams!");129
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} else {131
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System.out.println("They are NOT anagrams!");133
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}135
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System.out.println();137
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}139
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}141
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/*144
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* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.146
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*148
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* Redistribution and use in source and binary forms, with or without150
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* modification, are permitted provided that the following conditions152
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* are met:154
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*156
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* - Redistributions of source code must retain the above copyright158
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* notice, this list of conditions and the following disclaimer.160
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*162
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* - Redistributions in binary form must reproduce the above copyright164
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* notice, this list of conditions and the following disclaimer in the166
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* documentation and/or other materials provided with the distribution.168
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*170
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* - Neither the name of Oracle or the names of its172
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* contributors may be used to endorse or promote products derived174
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* from this software without specific prior written permission.176
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*178
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS180
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,182
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