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1 3LODV &DUORV'HOJDGR.ORRV,QJHQLHUtD7HOHPiWLFD 8QLY&DUORV,,,GH0DGULG Copyright 2001 Java: Pilas y Colas / 1 MHPSOR Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 2 1
2 MHPSOR Copyright 2001 Java: Pilas y Colas / 3 MHPSOR Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 4 2
3 &DUDFWHUtVWLFDV VWUXFWXUDOLQHDO $FFHVRGHLQVHUFLyQ\HOLPLQDFLyQ SRUXQVRORH[WUHPR Copyright 2001 Java: Pilas y Colas / 5 0pWRGRVSULQFLSDOHV 0HWHUSRUXQH[WUHPRpushx) 6DFDUSRUHOPLVPRH[WUHPRpop) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 6 3
4 MHPSOR &RPSUREDUSDUpQWHVLV %LHQ 0DO 5HJODV %ivlfr 6HFXHQFLDFLyQ $QLGDPLHQWR Copyright 2001 Java: Pilas y Colas / 7 MHPSOR &RPSUREDUSDUpQWHVLV 5HJODV &DGDYH]TXHQRVHQFRQWUHPRV ORPHWHPRVHQODSLOD &DGDYH]TXHQRVHQFRQWUHPRV ) VDFDPRVHOVXSHULRUGHODSLOD /DFDGHQDGHSDUpQWHVLVHVFRUUHFWD VLODSLODHVWiYDFtD DODFDEDUGHUHFRUUHUWRGDODFDGHQD Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 8 4
5 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 9 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 10 5
6 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 11 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 12 6
7 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 13 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 14 7
8 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 15 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 16 8
9 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 17 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 18 9
10 MHPSOR )))))) Copyright 2001 Java: Pilas y Colas / 19 MHPSOR )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 20 10
11 MHPSOR &RUUHFWR +HPRV UHFRUULGR WRGD OD FDGHQD \ OD SLOD HVWi YDFtD )))))) Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 21,QWHUID]SDUDSLODV public interface Stack { public int size); public boolean isempty); public void pushobject o); public Object pop) throws StackEmptyException; public Object top) throws StackEmptyException; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 22 11
12 8QLQWHUID]\ YDULDVLPSOHPHQWDFLRQHV Stack ArrayStack LinkedStack Copyright 2001 Java: Pilas y Colas / 23,PSOHPHQWDFLyQ EDVDGDHQDUUD\V S top top top top top top N-1 Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 24 12
13 ,PSOHPHQWDFLyQ EDVDGDHQDUUD\V public class ArrayStack implements Stack { public static final int CAP=1000; private int capacity; private Object S[]; private int top=-1; public ArrayStack){thisCAP);} public ArrayStackint cap){ capacity=cap; S=new Object[capacity];} Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 25,PSOHPHQWDFLyQ EDVDGDHQDUUD\V public int size) {return top+1);} public boolean isempty) {return top<0);} public Object top) throws StackEmptyException { if isempty)) throw new StackEmptyException"vacio"}; return S[top];} Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 26 13
14 ,PSOHPHQWDFLyQ EDVDGDHQDUUD\V public void pushobject o) throws StackFullException { if size)==capacity) throw new StackFullException"lleno"); S[++top]=o;} public Object pop) throws StackEmptyException { Object el; if isempty)) throw new StackEmptyException"vacio"}; el=s[top]; S[top--]=null; return el;} Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 27 },PSOHPHQWDFLyQEDVDGD HQOLVWDVHQFDGHQDGDV Madrid Miami Múnich Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 28 14
15 ,PSOHPHQWDFLyQ EDVDGDHQOLVWDV class Node { private Object elem; private Node next; public NodeObject e, Node n) { elem=e; next=n;} void setelemobject e) {elem=e;} void setnextnode n) {next=n;} Object getelem) {return elem;} Object getnext) {return next;} } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 29,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public class LinkedStack implements Stack { private Node top; private int size; public LinkedStack) {top=null; size=0;} public int size) {return size;} public boolean isempty) { returntop==null);} Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 30 15
16 ,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public void pushobject e) { Node n=new Node); n.seteleme); n.setnexttop); top=n; size++; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 31,QVHUFLyQpush top Madrid Miami Múnich Moscú Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 32 16
17 ,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public Object top) throws StackEmptyException { if isempty)) throw new StackEmptyException"vacia"); return top.getelem); } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 33,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public Object pop) throws StackEmptyException { Object temp; if isempty)) throw new StackEmptyException"vacia"); temp=top.getelem); top=top.getnext); size--; return temp; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 34 17
18 %RUUDGRpop top Moscú Madrid Miami Múnich Copyright 2001 Java: Pilas y Colas / 35 3LODV\UHFXUVLyQ public static long fac int n) {if n<=1) return 1; else return n*facn-1); } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 36 18
19 MHFXFLyQ fac4) 4*fac3) 4*3*fac2)) 4*3*2*fac1))) 4*3*2*1))) 4*3*2) 4*6 24 2* 3* 4* Copyright 2001 Java: Pilas y Colas / 37 &RODV &DUORV'HOJDGR.ORRV,QJHQLHUtD7HOHPiWLFD 8QLY&DUORV,,,GH0DGULG Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 38 19
20 MHPSOR /DFRODGHODXWRE~V /DFRODGHODLPSUHVRUD Copyright 2001 Java: Pilas y Colas / 39 &DUDFWHUtVWLFDV VWUXFWXUDOLQHDO $FFHVRGHLQVHUFLyQSRUXQH[WUHPR\ GHHOLPLQDFLyQSRUHORWURH[WUHPR Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 40 20
21 ,QWHUID]SDUDFRODV public interface Queue { public int size); public boolean isempty); public void enqueueobject o); public Object dequeue) throws QueueEmptyException; public Object front) throws QueueEmptyException; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 41 8QLQWHUID]\ YDULDVLPSOHPHQWDFLRQHV Queue ArrayQueue LinkedQueue Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 42 21
22 ,QVHUFLyQenqueue top tail Madrid Miami Múnich Moscú Copyright 2001 Java: Pilas y Colas / 43,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public void enqueueobject e) { Node n=new Node); n.seteleme); n.setnextnull); if size==0) top=n; else tail.setnextn); tail=n; size++; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 44 22
23 ,PSOHPHQWDFLyQ EDVDGDHQOLVWDV public Object dequeue) throws QueueEmptyException { Object temp; if isempty)) throw new QueueEmptyException"vacia"); temp=top.getelem); top=top.getnext); size--; if size==0) tail=null return temp; } Copyright 2001 cdk@it.uc3m.es Java: Pilas y Colas / 45 23
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