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 public static boolean isLetter(char c) { 
                 int k = 0x80; 
                 return c / k == 0 ? true : false; 
             } 
          
             /**
              * µÃµ½Ò»¸ö×Ö·û´®µÄ³¤¶È,ÏÔʾµÄ³¤¶È,Ò»¸öºº×Ö»òÈÕº«Îij¤¶ÈΪ2,Ó¢ÎÄ×Ö·û³¤¶ÈΪ1
              * 
              * @param s ÐèÒªµÃµ½³¤¶ÈµÄ×Ö·û´®
              * @return iµÃµ½µÄ×Ö·û´®³¤¶È
              */ 
             public static int strlength(String s) { 
                 if (s == null) 
                     return 0; 
                 char[] c = s.toCharArray(); 
                 int len = 0; 
                 for (int i = 0; i < c.length; i++) { 
                     len++; 
                     if (!isLetter(c[i])) { 
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 * @author ´ÞÎÀ±ø
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public class TimeTester {
   
    /**
     * ¼ÆË㼸ÌìǰµÄºÁÃëÊý
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¿ÕÖ¸ÕëÒì³£ÀࣺNullPointerException
ÀàÐÍÇ¿ÖÆ×ª»»Òì³££ºClassCastException
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import java.io.*;
public class QueueArray {  
    Object[] a; //¶ÔÏóÊý×飬¶ÓÁÐ×î¶à´æ´¢a.length-1¸ö¶ÔÏó  
    int front;  //¶ÓÊ×ϱꠠ
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class Node
{
private Object obj;
 private Node next;
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public Node(Object obj)
{
this.obj=obj;
}
//·µ»ØÏÂÒ»½ÚµãµÄ¶ÔÏó
public Node getNext()
{
return this.next;
}
//ÉèÖñ¾½ÚµãµÄÁ´Óò
public void setNext(Node next)
{
this.next=next;
}
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