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快速排序: SG-Xgr@
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package org.rut.util.algorithm.support; N=TDywRI
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import org.rut.util.algorithm.SortUtil; Q=F4ZrNqD
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/** ^:^8M4:
* @author treeroot aQL$?,
* @since 2006-2-2 A=\:b^\
* @version 1.0 UO_tJN#X
*/ Ydh+iLjhx
public class QuickSort implements SortUtil.Sort{ Og9:MFI
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/* (non-Javadoc) nb #)$l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h)sQ3B.}A
*/ qnTW?c9Z5
public void sort(int[] data) { A%%Vyz
quickSort(data,0,data.length-1); ,];QzENw
} t}f,j^`e
private void quickSort(int[] data,int i,int j){ # 4;(^`?
int pivotIndex=(i+j)/2; yFjjpEpnFt
//swap Yjh02wo
SortUtil.swap(data,pivotIndex,j); |&AZ95v
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int k=partition(data,i-1,j,data[j]); pij%u<
SortUtil.swap(data,k,j); H{VJS Jc{
if((k-i)>1) quickSort(data,i,k-1); nn{PhyK
if((j-k)>1) quickSort(data,k+1,j); \jHIjFwQ
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} zF#:Uc`C5U
/** "aJfW
* @param data tQmuok4"d
* @param i GfL:0
* @param j GVUZn//
* @return Q;y)6+VU4
*/ ,HtXD~N
private int partition(int[] data, int l, int r,int pivot) { Gq0`VHAn
do{ 4~J g\@
while(data[++l] while((r!=0)&&data[--r]>pivot); X@H/"B%u2
SortUtil.swap(data,l,r); ?[c{pb,|
} ISi^BFU
while(l SortUtil.swap(data,l,r); =.ReM_.
return l; +CXtTasP
} L(t!C~3
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} vMeB2r<
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改进后的快速排序: 7)dCdO
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package org.rut.util.algorithm.support; b&2N7%
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import org.rut.util.algorithm.SortUtil; {B7${AE
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/** F-%Hw
* @author treeroot <KBS ;t="1
* @since 2006-2-2 FqXE6^
* @version 1.0 Mew,g:m:
*/ @Io@1[k j
public class ImprovedQuickSort implements SortUtil.Sort { !24PJ\~I
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private static int MAX_STACK_SIZE=4096; 4)?s?+
private static int THRESHOLD=10; 3@wio[
/* (non-Javadoc) V@r V+s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c'SjH".[
*/ [,sm]/Xlc
public void sort(int[] data) { )>,ndKT~
int[] stack=new int[MAX_STACK_SIZE]; G.]'pn
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int top=-1; HsKq/Oyk
int pivot; %\T#Ik~3
int pivotIndex,l,r; aRy" _dZ2
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stack[++top]=0; {$Z
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stack[++top]=data.length-1; 'Lh nl3
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while(top>0){ sGG
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int j=stack[top--]; #=N6[:,
int i=stack[top--]; Dg*'n
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pivotIndex=(i+j)/2; iX-.mq$
pivot=data[pivotIndex]; *#83U?
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SortUtil.swap(data,pivotIndex,j); pgBIYeY,
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//partition T%4yPmY
l=i-1; XZT|ID_u"
r=j; pgPm0+N
do{ |?
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while(data[++l] while((r!=0)&&(data[--r]>pivot)); >Se-5QtLcf
SortUtil.swap(data,l,r); }Z)YK}_1
} ySHpN>U
while(l SortUtil.swap(data,l,r); Kd\d>&b
SortUtil.swap(data,l,j); /J9Or{#r
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if((l-i)>THRESHOLD){ /N,\ st
stack[++top]=i; 9P*f
stack[++top]=l-1; _Ud! tK*H
} .3#Xjhebvu
if((j-l)>THRESHOLD){ !_oR/)
stack[++top]=l+1; *;Cpz[N
stack[++top]=j; PEaZ3{-
} ,$U~<Zd
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} P 6({wx
//new InsertSort().sort(data); wk'&n^_br
insertSort(data); "U$](k.<VA
} ]f}(iD
/** =J]M#6N0
* @param data FF0~i+5
*/ \f=kQbM
private void insertSort(int[] data) { ^z~drcR
int temp; w c\`2(
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); qn'TIE.
} ;= 1[D
} (*,R21<%
} 4N=
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