5@f5S0 Y
$[z<oN_Q
快速排序: ?cK]C2Ak
\fi}Q\|C
package org.rut.util.algorithm.support; <5IQc[3]aP
(Ilsk{aB;A
import org.rut.util.algorithm.SortUtil; bVK$.*,
}_%P6
/** ir&.Z5=
* @author treeroot "DpKrVuG
* @since 2006-2-2 I$j|Rq
* @version 1.0 L~&" aF/b
*/ zy>}L #
public class QuickSort implements SortUtil.Sort{ .8H}Lf\
-oh7d$~
/* (non-Javadoc) 8xTix1u0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vYnftJK&
*/ >>7aw" 0
public void sort(int[] data) { BY(
eV!
quickSort(data,0,data.length-1); 9)lZyE}
} tX?J@+
private void quickSort(int[] data,int i,int j){ D=&K&6rr
int pivotIndex=(i+j)/2; ti9}*8
//swap (h,Ws-O
SortUtil.swap(data,pivotIndex,j); <L&eh&4c
F,pCR7o>
int k=partition(data,i-1,j,data[j]); ~L'nzquF
SortUtil.swap(data,k,j); f#OQ (WTJE
if((k-i)>1) quickSort(data,i,k-1); ZqK]jT6V/X
if((j-k)>1) quickSort(data,k+1,j); i@,]Z~]
T4GW1NP
} N`1r;%5
/** ( 3;`bvYH"
* @param data P']Y(
!L
* @param i *rf$>8~$n
* @param j 6N3@!xtpi
* @return *Hunp Y
*/ \ja `c)x
private int partition(int[] data, int l, int r,int pivot) { /80YZ
do{ .'lN4x
while(data[++l] while((r!=0)&&data[--r]>pivot); 3dm'xetM
SortUtil.swap(data,l,r); P4 6,o
} ~ 5"J(
while(l SortUtil.swap(data,l,r); [hHG.
return l; /s`;9)G]9
} %g w{[
/[A
6?o>{e7n^
} 6mHhC?
asz?p\k:bC
改进后的快速排序: }\Z5{OA
2 ~-( A
package org.rut.util.algorithm.support; ikHOqJ-,m
p(?3
V
import org.rut.util.algorithm.SortUtil; m&Sp1=*Ejy
@q)E=G1<o0
/** JIV8q HC
* @author treeroot woau'7}XOu
* @since 2006-2-2
9p*-?kPb
* @version 1.0 c[5@\j\
*/ 'vlrc[|/
public class ImprovedQuickSort implements SortUtil.Sort { q[c Etp28h
5-w: c>
private static int MAX_STACK_SIZE=4096; 9h&yuS'Yj
private static int THRESHOLD=10; |!Ists
/* (non-Javadoc) A.U'Q|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fU
={a2
*/ b n-=fb(
public void sort(int[] data) { sTOFw;v%
int[] stack=new int[MAX_STACK_SIZE]; hdj%|~Fj
4B$bj`h
int top=-1; WG%2<Q^
int pivot; ,q</@}.\wN
int pivotIndex,l,r; 3;Hd2 ;G
2AK}D%jfc
stack[++top]=0; 6x4_b
stack[++top]=data.length-1; voh^|(:(TH
$1e pf
while(top>0){ 6~@5X}^<0
int j=stack[top--]; os**hFPk;1
int i=stack[top--]; O`(U/?
o#}mkE87
pivotIndex=(i+j)/2; j^I!6j=ZX
pivot=data[pivotIndex]; +-ewE-:|L
xwOE+
SortUtil.swap(data,pivotIndex,j); 0b++17aV
5hz_P+Q
//partition @p]UvqtB@
l=i-1; 8\_*1h40s
r=j; ^ItAW$T]F
do{ hr~.Lj5^W
while(data[++l] while((r!=0)&&(data[--r]>pivot)); +WLD
SortUtil.swap(data,l,r); 2sun=3qb
} NCDxcz;Gb
while(l SortUtil.swap(data,l,r); D|TR!
SortUtil.swap(data,l,j); b1)\Zi
veO?k.u(
if((l-i)>THRESHOLD){ 7d9Z/J@>
stack[++top]=i; (hsZ
stack[++top]=l-1; ]]y[t|6
} **HrWM%?8o
if((j-l)>THRESHOLD){ !NA`g7'
stack[++top]=l+1; 6t$N78U
stack[++top]=j; s41adw>
} ]-Lruq#
}!B.K^@)
} \(bj(any
//new InsertSort().sort(data); m1y `v"
insertSort(data); +{*)}[w{x
} qc&jd
/** Gh+f1)\FA"
* @param data r?$&Z^
*/ zq=&4afOE
private void insertSort(int[] data) { A^L?_\e6
int temp; u\3ZIb
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); ay-9c2E
} >~wu3q
} -(
Kh.h
} KBj@V6Q
~'{VaYk]v
} SwJHgZ&
r\RFDj