J4}\V$ysN
MH.,s@
快速排序: bXH^Bm
0#[f2X62B
package org.rut.util.algorithm.support; VDKS_n
o w_y
import org.rut.util.algorithm.SortUtil; S@g/Tn
(`]*Y(/2G
/** i5KwYoN
* @author treeroot S8OVG4-
* @since 2006-2-2 DjzUH{6O
* @version 1.0 )6Q0f
*/ b'1d<sD
public class QuickSort implements SortUtil.Sort{ ,imvA5
n+qVT4o
/* (non-Javadoc) &fSc{/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E)O|16f|>
*/ K)`:v|d
public void sort(int[] data) { 1 j12Qn@]
quickSort(data,0,data.length-1); bez'[Y{
} %p2x^air
private void quickSort(int[] data,int i,int j){ iEviH>b5
int pivotIndex=(i+j)/2; jN%p5nZ^EK
//swap vif8{S
SortUtil.swap(data,pivotIndex,j); NceB'YG|
p$nK@t}
int k=partition(data,i-1,j,data[j]); fHd!/%iG
SortUtil.swap(data,k,j); {*
j^g6;
if((k-i)>1) quickSort(data,i,k-1); "Wk{ 4gS7l
if((j-k)>1) quickSort(data,k+1,j); r^A#[-VyNP
eq~c
} "'!%};
/** >I&
jurU#
* @param data e$EF% cKH
* @param i @y(Wy}
* @param j v"r9|m~ '
* @return 0R}Sw[M.
*/ >_`D3@Rz
private int partition(int[] data, int l, int r,int pivot) { [DxefYyI
do{ Z SRRlkU
while(data[++l] while((r!=0)&&data[--r]>pivot); "P'&+dH8
SortUtil.swap(data,l,r); e:J'&r& 1
} l^!A
while(l SortUtil.swap(data,l,r); -#wVtXaSc
return l; ZjZh z`
} 1_NG+H]x9
"Ug/
',jkV
} D*cyFAF
,xYsH+ybA
改进后的快速排序: DMQNr(w{!2
(~Uel1~@
package org.rut.util.algorithm.support; }@14E-N=
;}WtJ&y=M
import org.rut.util.algorithm.SortUtil; rMHQzQ0%
*NW QmC~
/** ;4G\]%c)E{
* @author treeroot t@(9ga(
* @since 2006-2-2 /> 3
* @version 1.0 KR=d"t Qw
*/ 2]D$|M?$~
public class ImprovedQuickSort implements SortUtil.Sort { /c@*eU
=zm0w~']E!
private static int MAX_STACK_SIZE=4096; V3mjbH>F
private static int THRESHOLD=10; *IWFeu7y
/* (non-Javadoc) r]8x;v1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) VyWYfPK
*/ ov`^o25f
public void sort(int[] data) { ?+n&hHRg
int[] stack=new int[MAX_STACK_SIZE]; qByNHo7Tb
i
Y*o;z,~
int top=-1; U|J$?aFDr
int pivot; c6,s+^^
int pivotIndex,l,r; +9zJlL^A%
A<SOT >m]
stack[++top]=0; UZje>.~?
stack[++top]=data.length-1; {}_ Nep/;
oWp}O?
while(top>0){ .Iwur;/\
int j=stack[top--]; .?rbny
int i=stack[top--]; _ }E-~I>
%j'G.*TD
pivotIndex=(i+j)/2; #2PrGz]
pivot=data[pivotIndex]; *N-;V|{
U~:N^Sc
SortUtil.swap(data,pivotIndex,j); U!&_mD#
c
UzgA26;
//partition v/R[?H)
l=i-1; +M'aWlPg,
r=j; .tRr?*V|l
do{ Ot`LZ"H:
while(data[++l] while((r!=0)&&(data[--r]>pivot)); F qeV3N
SortUtil.swap(data,l,r); "1XXE3^^
} VG_uxKY
while(l SortUtil.swap(data,l,r); d4Co^A&
SortUtil.swap(data,l,j); `DLp<_z>
qH#r-
if((l-i)>THRESHOLD){ ?a5h iN0
stack[++top]=i; ic*->-!
stack[++top]=l-1; 8!4~T,9G
} iq"ob8.
if((j-l)>THRESHOLD){ PiMKu|,3
stack[++top]=l+1; /&PKCtm&~
stack[++top]=j; yoBgr7gS
} _wf5%(~b
j G-
} I|,pE**T
//new InsertSort().sort(data); Y5dD|]F|
insertSort(data); ]} 61vV
} q$r&4s)To
/** sl/=g
* @param data z Yw;q3"
*/ U;xu/xDRi
private void insertSort(int[] data) { Y^52~[w~
int temp; q#P$'7"
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); v(DwU!
} I eG=J4:*
} yND"bF9
} %35L=d[
'_:(oAi,C
} JD6aiI!Su
C5P$&s\