~Qg:_ @@\
u/s,#
快速排序: QmHj=s:x\
[nSlkl
package org.rut.util.algorithm.support; ZnrsJ1f:
p?@R0]
import org.rut.util.algorithm.SortUtil;
5yA1<&z
3EY>XS
/** 30BFwNE
* @author treeroot QaVxP1V#U
* @since 2006-2-2 Ca2He}r`
* @version 1.0 -'!K("
*/ $m
hIXA.
public class QuickSort implements SortUtil.Sort{
AqqD!
st7\k]J\
/* (non-Javadoc) MC'2;,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vk:k ~
*/ YGdzA]3>
public void sort(int[] data) { ^-wdIu~p?
quickSort(data,0,data.length-1); Xa,d"R~
} r%:Q(|v?
private void quickSort(int[] data,int i,int j){ X=1Po |
int pivotIndex=(i+j)/2; s%cfJe_k
//swap /
5\gP//9K
SortUtil.swap(data,pivotIndex,j); 7O.?I#
76
t[r<&1[&
int k=partition(data,i-1,j,data[j]); ^X?D4a|;#g
SortUtil.swap(data,k,j); uT
Z#85L`
if((k-i)>1) quickSort(data,i,k-1); _VjfjA<c8
if((j-k)>1) quickSort(data,k+1,j); *A^`[_y
T'W@fif
} W5)R{w0`GD
/** r
9~Wh
$
* @param data o[A y2"e?
* @param i {M_*hR;lL
* @param j s^&Oh*SP*
* @return =/#+,
*/ _N @h
private int partition(int[] data, int l, int r,int pivot) { ;q"Yz-3
do{ ~[N"Q|D3Y
while(data[++l] while((r!=0)&&data[--r]>pivot); B2kKEMdGg
SortUtil.swap(data,l,r); $>M-oNeC
} w7#9t
while(l SortUtil.swap(data,l,r); ,P>xpfdK
return l; xj!G9x<!
} dvc=<!"'S
#9/^)^k
} ?'8(']/
JmP[ 9"
改进后的快速排序: 7u=R5
fO UW{s
package org.rut.util.algorithm.support; -qJ%31Mr#
:lfUVa{HN
import org.rut.util.algorithm.SortUtil; j@o
\d%.'!
lSG"c+iV
/** \jpm
* @author treeroot _\ &