讨论曾经被考过的一个面试题：将一个英文句子单词倒置的实现...

StringReverser reverser = new StringReverser("this is a test String");;
String reversString = reverser.reverse();;

package com.sweater.test;

public class TestSWT {

	public static String reverse(String str); {
		StringBuffer reverseStr = new StringBuffer(str);.reverse();;

		String regex = "[\\s\\,\\?\\'\\.\\:\\.]";
		String[] splitStr = str.split(regex);;

		for (int i = 0; i < splitStr.length; i++); {
			StringBuffer sbTemp = new StringBuffer(splitStr[i]);;

			String strTemp = reverseStr.toString();;
			strTemp = strTemp.replaceFirst(sbTemp.reverse();.toString();,
					splitStr[i]);;

			reverseStr = new StringBuffer(strTemp);;

		}

		//System.out.println(reverseStr.toString(););;

		return reverseStr.toString();;
	}

	public static void main(String[] args); {

		String s1 = "I am a student.";
		String s2 = "I am a student , yes? no";
		String s3 = " she said:'It's OK!'";
		String s4 = "I am a code? yes   ";

		System.out.println("s1=[" + s1 + "], reversed s1=["
				+ TestSWT.reverse(s1); + "]");;
		System.out.println("s2=[" + s2 + "], reversed s2=["
				+ TestSWT.reverse(s2); + "]");;
		System.out.println("s3=[" + s3 + "], reversed s3=["
				+ TestSWT.reverse(s3); + "]");;
		System.out.println("s4=[" + s4 + "], reversed s4=["
				+ TestSWT.reverse(s4); + "]");;
	}
}

import java.util.StringTokenizer;

public class Test{

    public static final String SEPARATORS = " ,\t:'';?!"; 

    public static String reverse(String input);{
    
        StringTokenizer st = new StringTokenizer(input, SEPARATORS, true);;
        StringBuffer words = new StringBuffer("");;
        while (st.hasMoreTokens();); {
            words.insert( 0, st.nextToken(); );;
        }    
        return words.toString();;
    }        
    
    public void testReverse();{
        
        String[] sentences = new String[]{
            "Hello, world!",
            "I am a student",
            "Am I a student? yes, or no",
            "Am I a student ? yes , or no",
            "Zhuang says:'It's just a coding game.'"
            };
            
        for (int i = 0; i < sentences.length; i++);
            System.out.println("Sentence[" + i + "]=[" + sentences[i]+"], " + 
                "After reversed: [" + Test.reverse(sentences[i]);+"]");;
       
    }
    
    public static void main(String[] args);{
        new Test();.testReverse();;
    }
    
        
}

	/**
	 * if char is in range of A~Z or a~z return true
	 * else return false
	 *
	 * @param c
	 * @return
	 */
	private boolean isCharacter(char c); {
		long x = 'A'; //65
		long y = 'Z'; //90
		long m = 'a'; //97
		long n = 'z'; // 122				
		return (c >= x && c <= y); || (c >= m && c <= n);;
	}