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快速排序: 5R MS(
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package org.rut.util.algorithm.support; \~rlgxd
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import org.rut.util.algorithm.SortUtil; 9e!NOl\_;.
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/** @pV5}N[]
* @author treeroot XP[uF ;w
* @since 2006-2-2 VUU]Pu &
* @version 1.0 ;_kzcK!l
*/ G*
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public class QuickSort implements SortUtil.Sort{ C@y8.#l
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/* (non-Javadoc) JD>d\z2QC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pfuW
*/ "kMzmo=Pv5
public void sort(int[] data) { &tR(n$M@>
quickSort(data,0,data.length-1); %bXx!x8(
} JF9yVE -
private void quickSort(int[] data,int i,int j){ .uo.N
int pivotIndex=(i+j)/2; =Yo1v=wxN
//swap #4LFG\s
SortUtil.swap(data,pivotIndex,j); ~i'Nqe_
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int k=partition(data,i-1,j,data[j]); 7"X>?@
SortUtil.swap(data,k,j); /{2*WI;
if((k-i)>1) quickSort(data,i,k-1); }]1BO
if((j-k)>1) quickSort(data,k+1,j); XhzGLYb~I`
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} LVtQ^ 5>8
/** VQx-gm8}!
* @param data J+|V[E<x
* @param i pr89zkYw
* @param j _[tBLGXD
* @return GV[BpH
*/ Lcb59Cs6e
private int partition(int[] data, int l, int r,int pivot) { gbZ X'D
do{ gb#wrI
while(data[++l] while((r!=0)&&data[--r]>pivot); LtIZgOd<
SortUtil.swap(data,l,r); e(5R8ud
} sgsMlZ3/
while(l SortUtil.swap(data,l,r); |
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return l; 0].5[Jo
} 78#ud15Ml
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} tR/
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改进后的快速排序: .}>[Kr
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package org.rut.util.algorithm.support; #Og_q$})f
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import org.rut.util.algorithm.SortUtil; []^>QsS(X
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/** Y[,C1,
* @author treeroot j*
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* @since 2006-2-2 ]F#kM21 1
* @version 1.0 }N!8i'suz9
*/ {,srj['RS
public class ImprovedQuickSort implements SortUtil.Sort { _<