I@v.Hqg+7
1&E&8In]$r
快速排序: P"<ad
kr
H8k| >4
package org.rut.util.algorithm.support; .W:], 5e
cu|q&
import org.rut.util.algorithm.SortUtil; 1H@F>}DP
o:ob1G[p%
/** * OFT)S
* @author treeroot o62gLO]z@
* @since 2006-2-2 wj~8KHan
* @version 1.0 hV>Ey^Ty
*/ ^E*C~;^S
public class QuickSort implements SortUtil.Sort{ 9j9?;3;
C,.{y`s'
/* (non-Javadoc) oD`BX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $"1&!
*/ U?yXTMD
public void sort(int[] data) { u{G6xuPWf
quickSort(data,0,data.length-1); `XY[HK
} THZ3%o=X
private void quickSort(int[] data,int i,int j){ +O6@)?pI
int pivotIndex=(i+j)/2; >.>5%
//swap "<b84?V5
SortUtil.swap(data,pivotIndex,j); [-a/]
l).Ijl}AH;
int k=partition(data,i-1,j,data[j]); B`Pi\1H6%
SortUtil.swap(data,k,j); oWOZ0]H1
if((k-i)>1) quickSort(data,i,k-1); Zwl?*t\D
if((j-k)>1) quickSort(data,k+1,j); tF(mD=[
yB[LO(i
} AP@d2{"m}
/** ]"_'o~
* @param data |V]E8Qt
* @param i e@YR/I8my
* @param j dq&d>f1
* @return aS2
Y6
*/ _:
x$"i
private int partition(int[] data, int l, int r,int pivot) { V4D&&0&n
do{ VNPdL
while(data[++l] while((r!=0)&&data[--r]>pivot); _95tgJ y
SortUtil.swap(data,l,r); 9rz "@LM
} r&;AG@N/
while(l SortUtil.swap(data,l,r); euK!JZ
return l; E>v~B;@
} SNFz#*
$!lxVZ>
} &*~
WK
`dhK$jYD
改进后的快速排序: Rwk|cqr
{D8IA3w
package org.rut.util.algorithm.support; dRmTE
yKJp37R
import org.rut.util.algorithm.SortUtil; _>l,%n
l71\II
/** C: cu1Y9
* @author treeroot t&]IgF
* @since 2006-2-2 ~ME=!;<_
* @version 1.0 NeP1 #
*/ T@.CwV
public class ImprovedQuickSort implements SortUtil.Sort { u@Lu.t!],
FSk:J~Z;
private static int MAX_STACK_SIZE=4096; X:5*LB\/v
private static int THRESHOLD=10; f5v|}gMAX
/* (non-Javadoc) .>e~J+oL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @P>@;S
*/ C+j+q648>
public void sort(int[] data) { `{":*V
int[] stack=new int[MAX_STACK_SIZE]; ufOaD7
<j'#mUzd
int top=-1; xPv&(XZR
int pivot; nq;)!Wry
int pivotIndex,l,r; U_?RN)>j
w,7
GC5j\
stack[++top]=0; V{r@D!}
stack[++top]=data.length-1; A{vG@Pwc:
`,O^=HBM
while(top>0){ xM,3F jF
int j=stack[top--]; +TX]~k79Oq
int i=stack[top--]; =&'j;j
OZ&aTm :
pivotIndex=(i+j)/2; FtXEudk
pivot=data[pivotIndex]; }e$);A|
V
RL6F2 >6
SortUtil.swap(data,pivotIndex,j); O<*iDd`(e
.O(UK4Mb
//partition K!X8KPo
l=i-1; o2L/8q.
r=j; DzEixE-
do{ }m?L/Y'}
while(data[++l] while((r!=0)&&(data[--r]>pivot)); &nYmVwi?"Q
SortUtil.swap(data,l,r); )mU)7@!
} ?/~1z*XUW
while(l SortUtil.swap(data,l,r); 4^5s\f B
SortUtil.swap(data,l,j); {+MMqJCa
\BDNF<_
if((l-i)>THRESHOLD){ 6lPGop]js]
stack[++top]=i; Q=[&~^Y)
stack[++top]=l-1; FP$]D~DMo
} `i-&Z`
if((j-l)>THRESHOLD){ ]iPdAwc.1
stack[++top]=l+1; %rsW:nl
stack[++top]=j; uIu0"pv`x
} 0M"E6z)9
IlVi1`]w
} 6S(3tvUr
//new InsertSort().sort(data); %K%z<R8
insertSort(data); c-,/qn/
} LQe<mZ<
/** ]=/f`
* @param data _Z%C{~,7)x
*/ p0/I}n4<5n
private void insertSort(int[] data) { >9DgsA`'
int temp; AjpQb~\
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); *KMCU
m
} vgV0a{u"
} 3yQ(,k #
} t|//oEY
~b+>o
} _%x|,vo`(
{5*5tCIt