归并排序: z<?)Rq"
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package org.rut.util.algorithm.support; oUU1+F-
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import org.rut.util.algorithm.SortUtil; E:nF$#<'N
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/** zQd
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* @author treeroot )+DmOsH
* @since 2006-2-2 8{sGNCvU
* @version 1.0 _-g&PXH
*/ #@Jq~$N|
public class MergeSort implements SortUtil.Sort{ UP,c |
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/* (non-Javadoc) }o`76rDN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H G^'I+Yn
*/ vXje^>_6
public void sort(int[] data) { `b$.%S8uj=
int[] temp=new int[data.length]; !+v$)3u9
mergeSort(data,temp,0,data.length-1); 2BwO!Y[
} XwaXdvmK
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private void mergeSort(int[] data,int[] temp,int l,int r){ Lp9E:D->
int mid=(l+r)/2; oCz/HQoBk
if(l==r) return ; &F~T-i>X
mergeSort(data,temp,l,mid); vEJbA
mergeSort(data,temp,mid+1,r); <)D$51 &0
for(int i=l;i<=r;i++){ 9\7en%( M
temp=data; zTU0HR3A
} 'D1xh~
int i1=l; H4+i.*T#
int i2=mid+1; N(yzk_~
for(int cur=l;cur<=r;cur++){ +6+i!Sip
if(i1==mid+1) eJ-nKkg~a
data[cur]=temp[i2++]; C,4e"yynb
else if(i2>r) fz
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data[cur]=temp[i1++]; 61U09s%\0
else if(temp[i1] data[cur]=temp[i1++]; .Z *'d
else N;`n@9BF
data[cur]=temp[i2++]; S?2>Er
} =T7.~W
} Y.p;1"
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} _H@DLhH|=
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改进后的归并排序: sFRQe]zCcP
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package org.rut.util.algorithm.support; H<+TR6k<
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import org.rut.util.algorithm.SortUtil; cw
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/** Jln:`!#fDf
* @author treeroot b&U62iq
* @since 2006-2-2 c7H^$_^ =
* @version 1.0 }0y"F
*/ pMM8-R'W-
public class ImprovedMergeSort implements SortUtil.Sort { ]7A'7p$Y
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private static final int THRESHOLD = 10; 7b+6%fV
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/* YN5rml'-
* (non-Javadoc) d&>^&>?$zh
* a d\ot#V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4_ML],.
*/ 6_B]MN!(
public void sort(int[] data) { ,PDQzJY
int[] temp=new int[data.length]; MF'JeM;H
mergeSort(data,temp,0,data.length-1); 6ik$B
} o)/ 0a
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private void mergeSort(int[] data, int[] temp, int l, int r) { <1TAw.
int i, j, k; <F'\lA9
int mid = (l + r) / 2; J<lW<:!3]
if (l == r) g<qaXv
return; uPvEwq*
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if ((mid - l) >= THRESHOLD) <C*hokqqP
mergeSort(data, temp, l, mid); {{!-Gr
else ~"A0Rs=
insertSort(data, l, mid - l + 1); r9XZ(0/p
if ((r - mid) > THRESHOLD) s5.CFA
mergeSort(data, temp, mid + 1, r); *0ro0Z|Iq
else 6!bsM"F
insertSort(data, mid + 1, r - mid); #<xm.
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for (i = l; i <= mid; i++) { gRzxLf`K
temp = data; VIbq:U
} o4WDh@d5S
for (j = 1; j <= r - mid; j++) { N2o7%gJw
temp[r - j + 1] = data[j + mid]; /gas2k==^
} \OoWo
int a = temp[l]; dc'Y`e
int b = temp[r]; izR"+v
for (i = l, j = r, k = l; k <= r; k++) { -nwypu
if (a < b) { qe\5m.k
data[k] = temp[i++]; A@u@ift
a = temp; N$tGQ@
} else { ~V6D<
data[k] = temp[j--]; NxILRKwO
b = temp[j]; `d(ThP;g
} Iga024KR
} \b>]8Un"
} U$UIN#
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/** y1#1Ne_
* @param data L"aeG
* @param l wuo,kM
* @param i q.}CU.dp
*/ ),!qTjD
private void insertSort(int[] data, int start, int len) { B-mowmJ3dg
for(int i=start+1;i for(int j=i;(j>start) && data[j] SortUtil.swap(data,j,j-1); }-2|XD%]
} |':{lH6+1
} _"{Xi2@H
} |vC~HJpuv'
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}