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快速排序: b 5u8j
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package org.rut.util.algorithm.support; I+VL~'VlS
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import org.rut.util.algorithm.SortUtil; xRI7_8Jpyn
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/** RZgklEU
* @author treeroot WP5QA8`3
* @since 2006-2-2 YcaomPo
* @version 1.0 e` QniTkT
*/ @F-InfB8.
public class QuickSort implements SortUtil.Sort{ Vx<`6uv
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/* (non-Javadoc) WEnI[JGe
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {PTB]D'
*/ L2,.af6+
public void sort(int[] data) { Ki,SFww8r
quickSort(data,0,data.length-1); 3tjF4C>h|
} cUH.^_a
private void quickSort(int[] data,int i,int j){ ,'nd~{pX"(
int pivotIndex=(i+j)/2; 3bd(.he2u
//swap q9h3/uTv
SortUtil.swap(data,pivotIndex,j); (qbL=R"
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int k=partition(data,i-1,j,data[j]); j TyR+#Wn
SortUtil.swap(data,k,j); ?^Q8#Y^M
if((k-i)>1) quickSort(data,i,k-1); 2d# 3LnO
if((j-k)>1) quickSort(data,k+1,j); @|2L>N
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} bih%hqny
/** dKk#j@[n"
* @param data N*w6D:
* @param i @CTSvTt$
* @param j 6/5Xy69:h
* @return ^xt @
*/ X7g@.Oy`
private int partition(int[] data, int l, int r,int pivot) { AL;z's(F?
do{ #B!HPlrv
while(data[++l] while((r!=0)&&data[--r]>pivot); 'nMj<:0wlD
SortUtil.swap(data,l,r); 6L!/#d0
} \2c3Nsra
while(l SortUtil.swap(data,l,r); x_+-TC4IXn
return l; k',#T932x1
} %4QpDt
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} F<+!28&h
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改进后的快速排序: Z^[
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package org.rut.util.algorithm.support; 4F`&W*x
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import org.rut.util.algorithm.SortUtil; WR<?_X_
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/** \GD\N=?~
* @author treeroot GyZpdp!
* @since 2006-2-2 `w_%HVw>"
* @version 1.0 &Yklf?EZ>Q
*/ i<b-$9
public class ImprovedQuickSort implements SortUtil.Sort { Mgp+#w+,
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private static int MAX_STACK_SIZE=4096; o}p^q:T*
private static int THRESHOLD=10; rHa*WA;TE
/* (non-Javadoc) z@21Z`,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L+X:M/)
*/ )vsX (/WU
public void sort(int[] data) { "OO)m](w
int[] stack=new int[MAX_STACK_SIZE]; jAcrXB*
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int top=-1; U!\~LKfA
int pivot; =o5|W'>`
int pivotIndex,l,r; `PUGg[Zx^
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stack[++top]=0; W>j@E|m$
stack[++top]=data.length-1; &~aS24c
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while(top>0){ @g5qcjD'[
int j=stack[top--]; -hY@r 7y
int i=stack[top--]; |kGQ~:k+P
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pivotIndex=(i+j)/2; *N&~Uq^
pivot=data[pivotIndex]; % aqP{mOO
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SortUtil.swap(data,pivotIndex,j); ^)UX#D3b
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//partition @GWJq
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l=i-1; g.*DlD%%
r=j; M5kw3Jy 5
do{ CUN1.i<pk8
while(data[++l] while((r!=0)&&(data[--r]>pivot)); .]e_je_
SortUtil.swap(data,l,r); .|e8v _2J
} kW7$Gw]-
while(l SortUtil.swap(data,l,r); 4:9N]1JCb
SortUtil.swap(data,l,j); mIZ6[ ?
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if((l-i)>THRESHOLD){ 0T7t.
stack[++top]=i; z*UgRLKZD
stack[++top]=l-1; )*XD"-9
} v&qL r+_7
if((j-l)>THRESHOLD){ 2e9.U/9
stack[++top]=l+1; Y$5uoq%p3A
stack[++top]=j; ?2%;VKN4
} RcC5_@W
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} ox*>HkV
//new InsertSort().sort(data); ALQ-aXJ
insertSort(data); SLW|)Q24
} akFT 0@9
/** Xp.$FJ1)
* @param data w{*PZb4
*/ \(MIDCZ@-
private void insertSort(int[] data) { ^
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int temp; Q2!5
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); T#<Q[h=
} (6Ciqf8
} I^Dm 3yz
} N8iLI`
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} 2?{'(iay
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