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快速排序: BDO]-y
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package org.rut.util.algorithm.support; 0+iaO"%
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import org.rut.util.algorithm.SortUtil; [s}nv]
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/** (oUh:w.]Gw
* @author treeroot |([|F|"
* @since 2006-2-2 B5pWSS
* @version 1.0 Y*KP1=Md
*/ >U.f`24
public class QuickSort implements SortUtil.Sort{ w]%|^:
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/* (non-Javadoc) Jtv~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g]ct6-m
*/ a%IJ8t+mn
public void sort(int[] data) { ]46-TuH
quickSort(data,0,data.length-1); ){sn!5=
} t=6[FK
private void quickSort(int[] data,int i,int j){ KkCA*GS
int pivotIndex=(i+j)/2; ag7(nn0!
//swap #guq/g$
SortUtil.swap(data,pivotIndex,j); $#HPwmd
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int k=partition(data,i-1,j,data[j]); gQ0W>\xz
SortUtil.swap(data,k,j); O 8\wH
if((k-i)>1) quickSort(data,i,k-1); )[Bl3+'
if((j-k)>1) quickSort(data,k+1,j); Q|CLis-
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} _'.YC<;
/** *oW^P~m/
* @param data s (hJ *
* @param i '1Z3MjX
* @param j S{l
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* @return `
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*/ 1c2zFBl.&
private int partition(int[] data, int l, int r,int pivot) { SXJ]()L?[v
do{ (c'kZ9&
while(data[++l] while((r!=0)&&data[--r]>pivot); T``O!>J
SortUtil.swap(data,l,r); v=Y)
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} Ln4zy*v{
while(l SortUtil.swap(data,l,r); 'A#bBn,|
return l; jkrv2 `"
} jx?"m=`s:
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} $7'K]'UJXO
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改进后的快速排序: !L({i')
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package org.rut.util.algorithm.support; (v2.8zrJ
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import org.rut.util.algorithm.SortUtil; (TF;+FRW
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/** @5)THYAx4
* @author treeroot {0ozpE*(
* @since 2006-2-2 #6'+e35^ 8
* @version 1.0 PAcbC|y
*/ br[n5
public class ImprovedQuickSort implements SortUtil.Sort { |nu)=Ag
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private static int MAX_STACK_SIZE=4096; IuW5LS
private static int THRESHOLD=10; 8#_"WzDw
/* (non-Javadoc) A
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -:jC.}
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*/ 8K;wX%_,
public void sort(int[] data) { )Z.M(P
int[] stack=new int[MAX_STACK_SIZE]; g:&V9