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快速排序: eS Z':p
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package org.rut.util.algorithm.support; ,OrrGwp&
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import org.rut.util.algorithm.SortUtil; oHfr
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/** E\}A<r
* @author treeroot _*z^PkH
* @since 2006-2-2 +L=Xc^
* @version 1.0 E
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*/ \hBzQ%0
public class QuickSort implements SortUtil.Sort{ y.(<
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/* (non-Javadoc) me@`;Q3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SP<(24zdd
*/ IPTFx
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public void sort(int[] data) { `#ff`j|a
quickSort(data,0,data.length-1); B3yTN6-
} GsO(\hR6^
private void quickSort(int[] data,int i,int j){ Z6b]EcP)#
int pivotIndex=(i+j)/2; pcIS}+L
//swap }x#e.}hf&
SortUtil.swap(data,pivotIndex,j); tW!*W?
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int k=partition(data,i-1,j,data[j]); J>M 9t%f@
SortUtil.swap(data,k,j); \>9^(N
if((k-i)>1) quickSort(data,i,k-1); l_;6xkv4
if((j-k)>1) quickSort(data,k+1,j); %INkuNa8\
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} P];0,;nF
/** -F(luRBS(W
* @param data \(`2 @
* @param i G'Wp)W;])\
* @param j Xn~\Vb
* @return {\k }:)
*/ B&7:=t,m(
private int partition(int[] data, int l, int r,int pivot) { !Mgo~h"]#
do{ eU)QoVt
while(data[++l] while((r!=0)&&data[--r]>pivot); G]$EIf'
SortUtil.swap(data,l,r); 6pb~+=3n
} R@uA4Al
while(l SortUtil.swap(data,l,r); )zy;!
return l; <l!:#u
} tZx}/&m-
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} Jza?DhSAZ
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改进后的快速排序: ]H{*Z3S
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package org.rut.util.algorithm.support; @ G!Ir"Q
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import org.rut.util.algorithm.SortUtil; GJ`._ju
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/** I5QtPqB>
* @author treeroot sZ7,7E|_
* @since 2006-2-2 2z$!}
* @version 1.0 hwvi tD!0
*/ T12Zak4.=
public class ImprovedQuickSort implements SortUtil.Sort { B1Pi+-t
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