Java»ùÓÚË«ÏòÁ´±íʵÏÖÁбí½á¹¹(Ëã·¨Ô´Âë)
/* ¸ßÊÖÖ®×÷£¬±¾È˽÷ÒÔÊÕ²ØÕßÉí·Ý¹²ÏíÔ´Â룬¹©´ó¼Ò²Î¿¼Ö®! */
/*
* ÁбíADT½Ó¿Ú
*/
package dsa;
public interface List {
//²éѯÁÐ±íµ±Ç°µÄ¹æÄ£
public int getSize();
//ÅжÏÁбíÊÇ·ñΪ¿Õ
public boolean isEmpty();
//·µ»ØµÚÒ»¸öÔªËØ£¨µÄλÖã©
public Position first();
//·µ»Ø×îºóÒ»¸öÔªËØ£¨µÄλÖã©
public Position last();
//·µ»Ø½ô½Ó¸ø¶¨Î»ÖÃÖ®ºóµÄÔªËØ£¨µÄλÖã©
public Position getNext(Position p)
throws ExceptionPositionInvalid, ExceptionBoundaryViolation;
//·µ»Ø½ô¿¿¸ø¶¨Î»ÖÃ֮ǰµÄÔªËØ£¨µÄλÖã©
public Position getPrev(Position p)
throws ExceptionPositionInvalid, ExceptionBoundaryViolation;
//½«e×÷ΪµÚÒ»¸öÔªËØ²åÈëÁбí
public Position insertFirst(Object e);
//½«e×÷Ϊ×îºóÒ»¸öÔªËØ²åÈëÁбí
public Position insertLast(Object e);
//½«e²åÈëÖÁ½ô½Ó¸ø¶¨Î»ÖÃÖ®ºóµÄλÖÃ
public Position insertAfter(Position p, Object e)
throws ExceptionPositionInvalid;
//½«e²åÈëÖÁ½ô¿¿¸ø¶¨Î»ÖÃ֮ǰµÄλÖÃ
public Position insertBefore(Position p, Object e)
throws ExceptionPositionInvalid;
//ɾ³ý¸ø¶¨Î»Öô¦µÄÔªËØ£¬²¢·µ»ØÖ®
public Object remove(Position p)
throws ExceptionPositionInvalid;
//ɾ³ýÊ×ÔªËØ£¬²¢·µ»ØÖ®
public Object removeFirst();
//ɾ³ýÄ©ÔªËØ£¬²¢·µ»ØÖ®
public Object removeLast();
//½«´¦ÓÚ¸ø¶¨Î»ÖõÄÔªËØÌæ»»ÎªÐÂÔªËØ£¬²¢·µ»Ø±»Ìæ»»µÄÔªËØ
public Object replace(Position p, Object e)
throws ExceptionPositionInvalid;
//λÖõü´úÆ÷
public Iterator positions();
//ÔªËØµü´úÆ÷
public Iterator elements();
}
/*
* »ùÓÚË«ÏòÁ´±íʵÏÖÁбí½á¹¹
*/
package dsa;
public class List_DLNode implements List {
protected int numElem;//ÁбíµÄʵ¼Ê¹æÄ£
protected DLNode header, trailer;//ÉÚ±ø£ºÊ×½Úµã+Ä©½Úµã
//¹¹Ô캯Êý
public List_DLNode() {
numElem = 0;//¿Õ±í
header = new DLNode(null, null, null);//Í·½Úµã
trailer = new DLNode(null, header, null);//β½Úµã
header.setNext(trai
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