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快速排序: 4&IBNc,sn
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package org.rut.util.algorithm.support; L1"y5HJ
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import org.rut.util.algorithm.SortUtil; |
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/** %C*oy$.
* @author treeroot q^],K'
* @since 2006-2-2 j[!'l,I
* @version 1.0 kN9pl^2
*/ wy5vn?T@
public class QuickSort implements SortUtil.Sort{ t.m65
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/* (non-Javadoc) * iW>i^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zR2'xE*
*/ cDMA#gp
public void sort(int[] data) { noiUi>G;:
quickSort(data,0,data.length-1); mjbr}9
} 2F(zHa
private void quickSort(int[] data,int i,int j){ 7Wg0-{yK4
int pivotIndex=(i+j)/2; (q+U5Ls6
//swap 0eY$K7
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SortUtil.swap(data,pivotIndex,j); *V(TNLIh;
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int k=partition(data,i-1,j,data[j]); {uEu
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SortUtil.swap(data,k,j); J2_D P
if((k-i)>1) quickSort(data,i,k-1); T_CYSS|fX
if((j-k)>1) quickSort(data,k+1,j); s$e0;C!D
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} !n4p*<Y6
/** kQXtO)
* @param data gio'_X
* @param i ^YzFEu$
* @param j Wd'wL"6De
* @return o
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*/ Eh;SH^&6
private int partition(int[] data, int l, int r,int pivot) { }0c
do{ Ex35
while(data[++l] while((r!=0)&&data[--r]>pivot); Wbc*x
SortUtil.swap(data,l,r); /X)fWO S6
} Hk%m`|Z
while(l SortUtil.swap(data,l,r); e$|g
return l; )
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} %7q,[g8
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改进后的快速排序: HgY"nrogt$
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package org.rut.util.algorithm.support; eX$P k:
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import org.rut.util.algorithm.SortUtil; 0%.l|~CE&
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/** +.MHI
* @author treeroot Gc}d#oo*k
* @since 2006-2-2 aloP@U/\Sn
* @version 1.0 D^P_3
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*/ O
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public class ImprovedQuickSort implements SortUtil.Sort { <