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快速排序: kj3o1 Y
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package org.rut.util.algorithm.support; 6nWx>R<
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import org.rut.util.algorithm.SortUtil; N7I71q|
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/** )Y,?r[4{
* @author treeroot {EoyMJgz
* @since 2006-2-2 }jY[| >z
* @version 1.0 cVHE}0Xd(
*/ %}ApO{
public class QuickSort implements SortUtil.Sort{ YT(1
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/* (non-Javadoc) UK<DcM~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L5 k>;|SA
*/ hte9l)
public void sort(int[] data) { c>i*HN}Z|
quickSort(data,0,data.length-1); `7qp\vYL
} F)5B[.ce
private void quickSort(int[] data,int i,int j){ !|:q@|-
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int pivotIndex=(i+j)/2; t|U2ws#
//swap QH' [(
SortUtil.swap(data,pivotIndex,j); k-ex<el)#
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int k=partition(data,i-1,j,data[j]); `w=H'"Zv
SortUtil.swap(data,k,j); dK;\`>8
if((k-i)>1) quickSort(data,i,k-1); FPUR0myCU
if((j-k)>1) quickSort(data,k+1,j); L|1zHDxQ
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} q}F%o0
/** #HuA(``[d
* @param data x^O2Lj,w\
* @param i hYUV9k:
* @param j 73z|'0.
* @return vwH7/+
*/ .q9|XDqQc
private int partition(int[] data, int l, int r,int pivot) { $E,DxDT
do{ 2SPFjpG8n
while(data[++l] while((r!=0)&&data[--r]>pivot); =O'%)Y&
SortUtil.swap(data,l,r); ]|LaMMD
} hCvLwZ?LF
while(l SortUtil.swap(data,l,r); Ufe
return l; :9
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} Nx (pJp{S
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改进后的快速排序: 4Z~Dxo
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package org.rut.util.algorithm.support; 5F sj_wFk
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import org.rut.util.algorithm.SortUtil; :+^$?[6]
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/** PW//8lsR
* @author treeroot >Wit"p
* @since 2006-2-2 Qp{-!*
* @version 1.0 6ym)F!t8l
*/ |wb(rua
public class ImprovedQuickSort implements SortUtil.Sort { hG;=ci3EE
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private static int MAX_STACK_SIZE=4096; 8U:dgXz
private static int THRESHOLD=10; c2mt<DtWW
/* (non-Javadoc) Ru')X{]25
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )zt4'b\)v
*/ RrpFi'R
public void sort(int[] data) { "sx&