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快速排序: @1_M's;
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package org.rut.util.algorithm.support; s!*m^zx
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import org.rut.util.algorithm.SortUtil; o+e:HjZZ
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/** ?kfLOJQ:I
* @author treeroot v8Ga@*
* @since 2006-2-2 ,tt]C~\u
* @version 1.0 jqULg iC
*/ V=%j]`Os
public class QuickSort implements SortUtil.Sort{ n&V \s0
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/* (non-Javadoc) E! '|FJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X 4\
*/ 1"pvrX}
public void sort(int[] data) { 'CiV=&3/
quickSort(data,0,data.length-1); .W[ 9G\
} hV,)u3
private void quickSort(int[] data,int i,int j){ %fY\vd2
int pivotIndex=(i+j)/2; Y.9s-g
//swap X
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SortUtil.swap(data,pivotIndex,j); @edx]H1~^
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int k=partition(data,i-1,j,data[j]); =+{SZh@
SortUtil.swap(data,k,j); X6lkz*M.
if((k-i)>1) quickSort(data,i,k-1); (* WO<V
if((j-k)>1) quickSort(data,k+1,j); ~ ;CnwG
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} N"A863>
/** 0Z. bd=H
* @param data X?PcEAi;w
* @param i +6dq+8msF
* @param j y8jwfO3
* @return >K<n~;ON|
*/ luNEgCq
private int partition(int[] data, int l, int r,int pivot) { kzq3-NTV
do{ mUFg(;ya
while(data[++l] while((r!=0)&&data[--r]>pivot); J9+<9g4-t
SortUtil.swap(data,l,r); 7f!"vhCXM;
} i8CO+Iv*{
while(l SortUtil.swap(data,l,r); /CRZ
return l; /l o;:)AiP
} OjVI4@E;Xe
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} NGsG4y^g?z
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改进后的快速排序: Fp3NWvu
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package org.rut.util.algorithm.support; C!a#M{:
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import org.rut.util.algorithm.SortUtil; AmSrc.
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/** 0O,Q]P 82f
* @author treeroot IIrp-E MXJ
* @since 2006-2-2 $CT2E
* @version 1.0 >"}z
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*/ i@Vi.oc4[
public class ImprovedQuickSort implements SortUtil.Sort { QfHJZ7K.4
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private static int MAX_STACK_SIZE=4096; IdP"]Sv{<
private static int THRESHOLD=10; F^La\cZ*'
/* (non-Javadoc) Jat|n97$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'Ipp1a
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*/ UBj"m<
public void sort(int[] data) { M`1pze_A
int[] stack=new int[MAX_STACK_SIZE]; t@hE}R
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int top=-1; X,+M?
int pivot; G)|s(C!
int pivotIndex,l,r; ?<