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import java.util.Vector;
class CEL {
    void method (Vector vector) {
        for (int i = 0; i < vector.size (); i++)  // Violation
            ; // ...
    }
}
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class CEL_fixed {
    void method (Vector vector) {
        int size = vector.size ()
        for (int i = 0; i < size; i++)
            ; // ...
    }
}
¶þ¡¢Îª'Vectors' ºÍ 'Hashtables'¶¨Òå³õʼ´óС
JVMΪVectorÀ©³ä´óСµÄʱºòÐèÒªÖØÐ´´½¨Ò»¸ö¸ü´óµÄÊý×飬½«Ô­Ô­ÏÈÊý×éÖеÄÄÚÈݸ´ÖƹýÀ´£¬×îºó£¬Ô­ÏȵÄÊý×éÔÙ±»»ØÊÕ¡£¿É¼ûVectorÈÝÁ¿µÄÀ©´óÊÇÒ»¸öÆÄ·Ñʱ¼äµÄÊ¡£
ͨ³££¬Ä¬ÈϵÄ10¸öÔªËØ´óСÊDz»¹»µÄ¡£Äã×îºÃÄÜ׼ȷµÄ¹À¼ÆÄãËùÐèÒªµÄ×î¼Ñ´óС¡£
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import java.util.Vector;
public class DIC {
    public void addObjects (Object[] o) {
        // if length > 10, Vector needs to expand
        for (int i = 0; i< o.length;i++) {   
            v.add(o);   // capacity before it can add more elements.
        }
    }
    public Vector v = new Vector();  // no initialCapacity.
}
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    public Vector v = new Vector(20); 
    public Hashtable hash = new Hashtable(10);
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Dov Bulka, "Java Performance and Scalability Volume 1: Server-Side Programming
Techniques" Addison Wesley, ISBN: 0-201-70429-3 pp.55 – 57
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*
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public class TT {   
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JavaµÄÄÚ´æÄ£ÐÍJMM£¨Java Memory Model£©JMMÖ÷ÒªÊÇΪÁ˹涨ÁËÏ̺߳ÍÄÚ´æÖ®¼äµÄһЩ¹ØÏµ¡£¸ù¾ÝJMMµÄÉè¼Æ£¬ÏµÍ³´æÔÚÒ»¸öÖ÷ÄÚ´æ(Main Memory)£¬JavaÖÐËùÓÐʵÀý±äÁ¿¶¼´¢´æÔÚÖ÷´æÖУ¬¶ÔÓÚËùÓÐÏ̶߳¼Êǹ²ÏíµÄ¡£Ã¿ÌõÏ̶߳¼ÓÐ×Ô¼ºµÄ¹¤×÷ÄÚ´æ(Working Memory)£¬¹¤×÷ÄÚ´æÓÉ»º´æºÍ¶ÑÕ»Á½²¿·Ö×é³É£¬»º´æÖб£´æµÄÊÇÖ÷´æÖбäÁ¿µÄ¿½±´£¬»º´ ......
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