归并排序: W14
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package org.rut.util.algorithm.support; _/-jX
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import org.rut.util.algorithm.SortUtil; P3x= 8_#
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/**
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* @author treeroot 0ghGBuv1s
* @since 2006-2-2 8D3OOab
* @version 1.0 DEG[Z7Ju
*/ A@1W}8qY:
public class MergeSort implements SortUtil.Sort{ n22zq6m
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/* (non-Javadoc) Tc>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Xqg@ e:g
*/ cu7hBfj
public void sort(int[] data) { \#{PV\x:Nn
int[] temp=new int[data.length]; ,QY$:f<
mergeSort(data,temp,0,data.length-1); u47<J?!Q
} r&gvP|W%
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private void mergeSort(int[] data,int[] temp,int l,int r){ Y%;J/4dd
int mid=(l+r)/2; `,}7LfY
if(l==r) return ; N**)8(
mergeSort(data,temp,l,mid); sJL Oz>
mergeSort(data,temp,mid+1,r); P2vG)u
for(int i=l;i<=r;i++){
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temp=data; cF
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} x+cL(R
int i1=l; (RFH.iX
int i2=mid+1; '>
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for(int cur=l;cur<=r;cur++){ 1d+Kn Jy
if(i1==mid+1) rr,A Vw
data[cur]=temp[i2++]; T\Xf0|y
else if(i2>r) ~6t<`&f
data[cur]=temp[i1++]; 3c#^@Bj(-e
else if(temp[i1] data[cur]=temp[i1++]; <LH6my
else i?d545. u
data[cur]=temp[i2++]; 6I(Y<LZ5
} D8!
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改进后的归并排序: *MfH\X379
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package org.rut.util.algorithm.support; {YIVi:4q
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import org.rut.util.algorithm.SortUtil; IV*@}~BJ
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/** oU`8\n](
* @author treeroot _L
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* @since 2006-2-2 BH6)`0&2*N
* @version 1.0 3fPd|F.kF
*/ idW=
public class ImprovedMergeSort implements SortUtil.Sort { &<hDl<E
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private static final int THRESHOLD = 10; VWDXEa9
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/* e59P6/z
* (non-Javadoc) afrU>#+"
* kHLpa/A
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,p2BB"^_i
*/ X,-QxV=lc)
public void sort(int[] data) { bW03m_<M<1
int[] temp=new int[data.length]; rP$vZ^/c
mergeSort(data,temp,0,data.length-1); {p3VHd#
} k\->uSU9
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private void mergeSort(int[] data, int[] temp, int l, int r) { s&(,_34
int i, j, k;
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int mid = (l + r) / 2; 2y6@:VxSh
if (l == r) 'lmZ{a6
return; 1K(a=o[Ce
if ((mid - l) >= THRESHOLD) w1Ar[
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mergeSort(data, temp, l, mid); }{FKs!(4
else dLA'cQId
insertSort(data, l, mid - l + 1); o=/Cje
if ((r - mid) > THRESHOLD) @ qFE6!
mergeSort(data, temp, mid + 1, r); (EZ34,k'S
else 2hB';Dv
insertSort(data, mid + 1, r - mid); 5vxKkk&i4l
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for (i = l; i <= mid; i++) { <eWGvIEP[
temp = data; }m '= _u
} >R|*FYam
for (j = 1; j <= r - mid; j++) { ?Q$LIoR
temp[r - j + 1] = data[j + mid]; Z)iRc$;
} CR*9-Y93
int a = temp[l]; PT2b^PP
int b = temp[r]; $#Mew:J
for (i = l, j = r, k = l; k <= r; k++) { /cmnX'z
if (a < b) { O_}ZSB8"
data[k] = temp[i++]; Y-8qAF?SJ]
a = temp; NF?FEUoxz
} else { k:?+75?$
data[k] = temp[j--]; qg7]
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b = temp[j]; #3uBq(-Z
} iEDZ\\,
} x.>E7
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} qF9rY)ifm
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/** P1PP#>E-2
* @param data pB
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* @param l !*46@sb:
* @param i OtopA)
*/ d2H&@80
private void insertSort(int[] data, int start, int len) { KR
for(int i=start+1;i for(int j=i;(j>start) && data[j] SortUtil.swap(data,j,j-1);
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} wf7<#jIq
} V/j]UK0$
} Z=: oIAe
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}