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快速排序: ffyKAZ{]po
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package org.rut.util.algorithm.support; Zt[1RMO
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import org.rut.util.algorithm.SortUtil; R=M${u<t
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/** Wc_Ph40C<_
* @author treeroot 8YBsYKC
* @since 2006-2-2 {/ _.]Vh
* @version 1.0 $NWI_F4
*/ uEuK1f`
public class QuickSort implements SortUtil.Sort{ 'm"H*f
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/* (non-Javadoc) T3{qn$t8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jX{lo
*/ #PmF@
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public void sort(int[] data) { 2{h9a0b
quickSort(data,0,data.length-1); z|yC [Ota
} AuU:613]W8
private void quickSort(int[] data,int i,int j){ Tr}c]IP*
int pivotIndex=(i+j)/2; *$_<|
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//swap VG\ER}s&P
SortUtil.swap(data,pivotIndex,j); 6i\b&
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int k=partition(data,i-1,j,data[j]); GL1!Z3
SortUtil.swap(data,k,j); >[Q(!Ai
if((k-i)>1) quickSort(data,i,k-1); femAVx}go
if((j-k)>1) quickSort(data,k+1,j); aX1|&erI
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} TaB35glLY
/** =RUKN38
* @param data 0:nQGX!N
* @param i t9x.O
* @param j
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* @return ]}G(@9
*/ }EOn=*
private int partition(int[] data, int l, int r,int pivot) { J]|-.Wv1
do{ 5R,/X
while(data[++l] while((r!=0)&&data[--r]>pivot); 37!}8
SortUtil.swap(data,l,r); Y6fU;
} JX/rAnc@
while(l SortUtil.swap(data,l,r); 9!FV.yp%F
return l; e$tKKcj0T
} Dx Vt
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} f=J#mmHw$
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改进后的快速排序: Z!|nc.
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package org.rut.util.algorithm.support; poHDA=#
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import org.rut.util.algorithm.SortUtil; D9c8#k9Y.
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/** ;nv4lxm
* @author treeroot :ZU
* @since 2006-2-2 JCaT^KLz
* @version 1.0 #!y|cP~;I
*/ P67r+P,
public class ImprovedQuickSort implements SortUtil.Sort { !Nl"y'B|
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private static int MAX_STACK_SIZE=4096; Ctt{j'-[
private static int THRESHOLD=10; R_4600
/* (non-Javadoc) I[<C)IG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 35jP</
*/ sOLo[5y'
public void sort(int[] data) { R`>E_SY
int[] stack=new int[MAX_STACK_SIZE]; [N#2uo
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int top=-1; UXa3>q>
int pivot; KY"W{D9ib
int pivotIndex,l,r; I%*o7"
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stack[++top]=0; ;Cyt2]F
stack[++top]=data.length-1; w>VM--
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while(top>0){ }N4=~'R
int j=stack[top--]; eB!0:nHN
int i=stack[top--]; WZ~rsSZSV
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pivotIndex=(i+j)/2; R4QXX7h!
pivot=data[pivotIndex]; }[l`R{d5q>
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SortUtil.swap(data,pivotIndex,j); -@L*i|A
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//partition jt-ayLq
l=i-1; WGVvBX7#
r=j; "2 qp-'^[c
do{ 3=5+NJ'8
while(data[++l] while((r!=0)&&(data[--r]>pivot)); `<Zp!Hl(j
SortUtil.swap(data,l,r); |3\
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} {b+!0[
while(l SortUtil.swap(data,l,r); ](-:l6
SortUtil.swap(data,l,j); P*R`3Y,
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if((l-i)>THRESHOLD){ +~02j1Jx
stack[++top]=i; v*l1"0$
stack[++top]=l-1; o& $Fc8bH
} 0ltq~K
if((j-l)>THRESHOLD){ ?OvtR:h C
stack[++top]=l+1; X )g<F
stack[++top]=j; M_UhFY='
} OES+BXGX
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} 0P\)L`cG
//new InsertSort().sort(data); {o5E#<)
insertSort(data); Ck(D:
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} %,-vmqr
/** 0j4bu}@
* @param data -5d8j<,
*/ $0sUh]7y
private void insertSort(int[] data) { 8TC%]SvYim
int temp; FrB}2
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); nP4jOq*H
} pz@_%IUS
} g5X+iV
} y$#mk3(e~t
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} I6'U[)%
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