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快速排序: [piF MxZP
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package org.rut.util.algorithm.support; Q*&aC|b&
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import org.rut.util.algorithm.SortUtil; SOQ-D4q
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/** gXLZ) >+A+
* @author treeroot \{=`F`oB=
* @since 2006-2-2 xgqv2s>L
* @version 1.0 uQtk|)T E
*/ })Mv9~&S
public class QuickSort implements SortUtil.Sort{ cc(r,ij~4
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/* (non-Javadoc) Vt)\[Tl~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2{]S_. zV
*/ `NWgETf^#
public void sort(int[] data) { IL2Gsj)M
quickSort(data,0,data.length-1); QDgEJ%U-
} g6/N\[b%
private void quickSort(int[] data,int i,int j){ vWi.[]
int pivotIndex=(i+j)/2; Z0 IxYEp
//swap 8xpYQ<cax
SortUtil.swap(data,pivotIndex,j); NRuG?^/}d
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int k=partition(data,i-1,j,data[j]); $ X=D9h
SortUtil.swap(data,k,j); H^PqYLjN
if((k-i)>1) quickSort(data,i,k-1); _
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if((j-k)>1) quickSort(data,k+1,j); +V+*7s%fL
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} *[1u[H9Cv
/** MLD>"W
* @param data "kBqY+:Cn
* @param i P2Qyz}!wo
* @param j _?]BVw
* @return fByh";<`P
*/ l88a#zUQDN
private int partition(int[] data, int l, int r,int pivot) { +x9"#0|k;
do{ Q#ZD&RZ9.
while(data[++l] while((r!=0)&&data[--r]>pivot); yK%GsCJd:
SortUtil.swap(data,l,r); a[74%L?
} H, XLb.
while(l SortUtil.swap(data,l,r); q'Pz3/mk
return l; ^'u;e(AaE
} t3#H@0<
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} HLoQ}oK|K
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改进后的快速排序: |CZnq-,C
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package org.rut.util.algorithm.support; 78a-3){
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import org.rut.util.algorithm.SortUtil; +/!=Ub[:U
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/** VkTlPmr
* @author treeroot >SxZ9T|%
* @since 2006-2-2 m]=oaj@9
* @version 1.0 igj={==m
*/ oF@x]bmU
public class ImprovedQuickSort implements SortUtil.Sort { ULNAH`{D
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private static int MAX_STACK_SIZE=4096; D _bkUR1
private static int THRESHOLD=10; +{C9uY)$vf
/* (non-Javadoc) `J=1&ae