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快速排序: --32kuF&(
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package org.rut.util.algorithm.support; S>'S4MJE`
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import org.rut.util.algorithm.SortUtil; gk*Md+
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/** jDaWmy<ha
* @author treeroot m V U(b,
* @since 2006-2-2 M[Kk43;QY!
* @version 1.0 $;ssW"7~Qn
*/ ?
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public class QuickSort implements SortUtil.Sort{ I|{A&G}|q
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/* (non-Javadoc) 3=SN;cn
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D+y_&+&,t
*/ ,%L>TD'48s
public void sort(int[] data) { <gdKuoY
quickSort(data,0,data.length-1); p-6(>,+E[
} /{j")
private void quickSort(int[] data,int i,int j){ @ZD/y%e
int pivotIndex=(i+j)/2; T9c=As_EM
//swap pO;BX5(x
SortUtil.swap(data,pivotIndex,j); L&i _
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int k=partition(data,i-1,j,data[j]); XHN`f#(w
SortUtil.swap(data,k,j); w(y#{!%+
if((k-i)>1) quickSort(data,i,k-1); Ke_&dgsq
if((j-k)>1) quickSort(data,k+1,j); upJ|`,G{
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} /!u#S9_B
/** K)h\X~s
* @param data wl*"Vagb
* @param i sbZ^BFqp
* @param j x+L
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* @return 0%m}tfQ5
*/ _QhB0/C
private int partition(int[] data, int l, int r,int pivot) { xEA%UFB.!G
do{ ]{[8$|Mg
while(data[++l] while((r!=0)&&data[--r]>pivot); X1P_IB
SortUtil.swap(data,l,r); (IrX\Y
} e>ZF? (a0
while(l SortUtil.swap(data,l,r); h,D6MP
return l; {O"?_6',
} `wyX)6A|bt
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} [~
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改进后的快速排序: g;>M{)A
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package org.rut.util.algorithm.support; T%Vg0Y)P;
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import org.rut.util.algorithm.SortUtil; WdA6Y
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/** =h083|y>
* @author treeroot 0'DlsC/`*
* @since 2006-2-2 S[J=d%(
* @version 1.0 Tz=YSQy$9
*/ }x[d]fcC
public class ImprovedQuickSort implements SortUtil.Sort { Dm3/i|Y
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private static int MAX_STACK_SIZE=4096; @;-6qZ
private static int THRESHOLD=10; (N etn&
/* (non-Javadoc) <Wn"_Ud=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F^],p|4f
*/ CKAs3",
public void sort(int[] data) { Kp|#04]
int[] stack=new int[MAX_STACK_SIZE]; S+i .@N.^
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int top=-1; yrDWIU(8;6
int pivot; Z UvA`
int pivotIndex,l,r; m-SP #?3
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stack[++top]=0; [N|/d#
stack[++top]=data.length-1; NZ\aK}?~!
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while(top>0){ F4m Q#YlrS
int j=stack[top--]; 8tc9H}>
int i=stack[top--]; FmALmS
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pivotIndex=(i+j)/2; sFEkxZi<
pivot=data[pivotIndex]; /mB'Fn6)
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SortUtil.swap(data,pivotIndex,j); qM`XF32A$
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//partition ez2 gy"
l=i-1; s eFug
r=j; + *YGsM`E9
do{ L`i#yXR
while(data[++l] while((r!=0)&&(data[--r]>pivot)); +s6wF{
SortUtil.swap(data,l,r); N*PF&MyB
} 67I6]3[Z
while(l SortUtil.swap(data,l,r); 7k<4/|CQ{
SortUtil.swap(data,l,j); ASuxty
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if((l-i)>THRESHOLD){ o:\RJig<
stack[++top]=i; TtL2}Wdd.%
stack[++top]=l-1; -R!qDA"
} ,w.`(?I/
if((j-l)>THRESHOLD){ LE_1H>
stack[++top]=l+1; :!a9|Fh~
stack[++top]=j; :<%q9)aPf`
} VV(>e@Bc4
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} n6gYZd
//new InsertSort().sort(data); S7Xr~5>X
insertSort(data); \?,'i/c-
} \C3ir &
/** ?VMj;+'tr
* @param data @<]xbWhuw
*/ XpzdvR1
private void insertSort(int[] data) { w;.'>ORC
int temp; &jg