AUl[h&s
\i)@"}
快速排序: <(us(zbk]
\/r]Ra
package org.rut.util.algorithm.support; =e6!U5
f
A}1:fw\Fn3
import org.rut.util.algorithm.SortUtil; #|Je%t}~
`oE.$~'
/** fl*49-d
* @author treeroot Ba
n^wX
* @since 2006-2-2 =1mIk0H`
* @version 1.0 3LVL5y7|
*/ &2W`dEv]?
public class QuickSort implements SortUtil.Sort{ }BCxAwD4
n$"BF\eM
/* (non-Javadoc) !,*Uvs@b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2}ywNVS
*/ L_>LxF43
public void sort(int[] data) { McvLU+
quickSort(data,0,data.length-1); iyMoLZ5
} ;i 3C
private void quickSort(int[] data,int i,int j){ 1oG'm
int pivotIndex=(i+j)/2; *(VwD)*
//swap H]Gj$P=k
SortUtil.swap(data,pivotIndex,j); /IC]}0kkp
m9Dg%\B
int k=partition(data,i-1,j,data[j]); "+BuFhSLf
SortUtil.swap(data,k,j); 0#F<JsO|u
if((k-i)>1) quickSort(data,i,k-1); cty
if((j-k)>1) quickSort(data,k+1,j); dwm>!h
`h1>rP
} =&vRT;6
/**
@Lm (bW
* @param data {.UK{nA?sm
* @param i #YLI"/Kn
* @param j FFf
~Vmw
* @return d,t'e?
*/ S,C/l1s
private int partition(int[] data, int l, int r,int pivot) { OEHw%
do{ kgRgHkAH~
while(data[++l] while((r!=0)&&data[--r]>pivot); B 5va4@
SortUtil.swap(data,l,r); e?dR'*-z
} 6Kd,(DI
while(l SortUtil.swap(data,l,r); "o<&3c4
return l; &s&Ha{(!w
} SS-7y:6y>
iP?=5j=4
} p2m`pT
Wt!NLlN8
改进后的快速排序: E%)3{#.z
vLM-v
package org.rut.util.algorithm.support; diF2:80o
5%R$7>`Z
import org.rut.util.algorithm.SortUtil; ?w@KF%D
jiLt *>I
/** Oxh.&
* @author treeroot 97VS
xhr
* @since 2006-2-2 6x!
q
* @version 1.0 q.p.y0
*/ ,j\UZ
public class ImprovedQuickSort implements SortUtil.Sort { t$*CyYb{@
y1Yrf,E
m=
private static int MAX_STACK_SIZE=4096; h/#s\>)T
private static int THRESHOLD=10; X(K5>L>
/* (non-Javadoc) )<%IY&\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) b_oUG_B3]
*/ lQer|?#
public void sort(int[] data) { ,wk %)^
int[] stack=new int[MAX_STACK_SIZE]; >2<
Jb!f&
0bR})}a+Yg
int top=-1; :FI4GR*?
int pivot; XFvPc
int pivotIndex,l,r; eX{Tyd{
@{8SC~ha
stack[++top]=0; 4> (OM|X=9
stack[++top]=data.length-1; 5> =Ia@I
ZDl(q~4?z
while(top>0){ @jH8x!5u:
int j=stack[top--]; .cg"M0
int i=stack[top--]; _gP-$&JC
VW\~OH
pivotIndex=(i+j)/2; /%h<^YDBf
pivot=data[pivotIndex]; ITEd[
@^d
:8Jn?E (36
SortUtil.swap(data,pivotIndex,j); >*[Bq;
0D48L5kH#'
//partition -8, lXrH
l=i-1; 8E\6RjM
r=j; 2sXX0kq~V
do{ `n~bDG>
while(data[++l] while((r!=0)&&(data[--r]>pivot)); ngQ]
SortUtil.swap(data,l,r); !4!Y~7sI"\
} \Y}nehxG@
while(l SortUtil.swap(data,l,r); /g]m,Y{OI
SortUtil.swap(data,l,j); o_ SR
qi-!iT(fe
if((l-i)>THRESHOLD){ {!7 ^w
stack[++top]=i; wr;8o*~
stack[++top]=l-1; F /% 5 r{
} l+i9)Fc<i
if((j-l)>THRESHOLD){ ?hwT{h
stack[++top]=l+1; '-m )fWf
stack[++top]=j; GOhGSV#
} bZ*J]1y(.
L;k9}HWpP
} 06S-3bis
//new InsertSort().sort(data); N6_<[`
insertSort(data); A!j6JY.w
} I^fKZ^]8P
/** QBfsdu<@^
* @param data kkE1CHY
*/ 7tr;adjs
private void insertSort(int[] data) { c_^-`7g
int temp; 9hIcnPu
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); _,;|,
} QC*>
qo
} q!+m,
!M
} t9B]V
U.HeIJ#
} !FVXNl
+gQoYlso