)$O'L7I n&
aOEW$%
快速排序: l 1BAW$
qIO)<5\[%d
package org.rut.util.algorithm.support; ;F/s!bupCM
xoQqku"vn
import org.rut.util.algorithm.SortUtil; iH-(_$f;
BbgKaC q
/** .]; `
* @author treeroot R1/mzPG
* @since 2006-2-2 y p pZ@
* @version 1.0 vtq47i
*/ OV-#8RXJ
public class QuickSort implements SortUtil.Sort{ d81[hT}q
h|EHK!<"8
/* (non-Javadoc) x`K"1E{2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '~x jaa;.
*/ u}jC$T>2%6
public void sort(int[] data) { |+1k7S,
quickSort(data,0,data.length-1); I.1(qbPkF+
} @[;$R@M_3
private void quickSort(int[] data,int i,int j){ OuB[[L
int pivotIndex=(i+j)/2; 1+ V<-I@{
//swap Oz=!EG|N
SortUtil.swap(data,pivotIndex,j); I$f'BAw
qITd.<
k
int k=partition(data,i-1,j,data[j]); (>-(~7PR
SortUtil.swap(data,k,j); W"s)s
if((k-i)>1) quickSort(data,i,k-1); >NA{* *$0
if((j-k)>1) quickSort(data,k+1,j); bhCAx W
ahw0}S
} ?'OL2~
/** ro^T L
* @param data a*o k*r
* @param i 3e|,Z'4}4
* @param j {InW%qSn_
* @return @Z@S;RWSU
*/ #/WjKr n
private int partition(int[] data, int l, int r,int pivot) { /$UWTq/C7
do{ l^v,X%{Iz
while(data[++l] while((r!=0)&&data[--r]>pivot); lH>6;sE
SortUtil.swap(data,l,r); 9YwS"~Q =w
} =jvN8R*[
while(l SortUtil.swap(data,l,r); ^;cJjl'=
return l; Kxsj_^&|i
} J 77*Ue^
Bh6lK}9
} v3]~*\!5
buxyZV@1
改进后的快速排序: U,,rB(
}ct*<zj[~u
package org.rut.util.algorithm.support; sV`XJ9e|
Aoy=gK
import org.rut.util.algorithm.SortUtil; <##aD3)
w6[$vib'
/** o q cu<