用Java语言实现的各种排序,包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。 d.FU))lmD
插入排序: wAKHD*M)
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package org.rut.util.algorithm.support; Wd:pqhLh
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import org.rut.util.algorithm.SortUtil; SXk.7bMV6
/** #RBrii-,
* @author treeroot }T@=I&g;
* @since 2006-2-2 :~otzI4%!
* @version 1.0 f' ?/P~[
*/ hx9{?3#
public class InsertSort implements SortUtil.Sort{ J,F1Xmr4
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/* (non-Javadoc) ,AP0*Ln
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <0})%V?-
*/ ; ~pgF_
public void sort(int[] data) { FJ_7<4ET
int temp; ;Z]Wj9iY
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); `,qft[1
} P.y +jyu
} ,U~A=bsa
} i"h\*B=
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}
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冒泡排序: aKDY_D
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package org.rut.util.algorithm.support; Vu3DP+u|i
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import org.rut.util.algorithm.SortUtil; :W.H#@'(
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/** JOJ.79CT
* @author treeroot
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* @since 2006-2-2 =W~7fs
* @version 1.0 rfqwxr45h
*/ @G4Z
public class BubbleSort implements SortUtil.Sort{ YnEyL2SuU
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/* (non-Javadoc) 2:38CdkYp
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 39v Bsc
*/ ~/L:$
public void sort(int[] data) { q`9.@u@ a
int temp; "^#O7.oVi+
for(int i=0;i for(int j=data.length-1;j>i;j--){ 1}d
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if(data[j] SortUtil.swap(data,j,j-1); Db|f"3rq?
} Fi i(dmn
} 3"h*L8No
} 1#vu)a1+b
} ;/Hr ZhOE
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} Z>g72I%X
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选择排序: T8S&9BM7
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package org.rut.util.algorithm.support; |/Vq{gxp+
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import org.rut.util.algorithm.SortUtil; *j3U+HV
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/** bJ:5pBJ3
* @author treeroot G<C D4:V
* @since 2006-2-2 A?MM9Y}K
* @version 1.0 &{Z+p(3Gj
*/ z qA>eDx
public class SelectionSort implements SortUtil.Sort { #(tdJ<HvC|
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/* \'2rs152
* (non-Javadoc) 7m#EqF$P
* U^_\V BAk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *$9U/ d
*/ !KI^Z1dP(
public void sort(int[] data) { 3eUi9_s+
int temp; _WS8I>
for (int i = 0; i < data.length; i++) { ThV>gn5
int lowIndex = i; 0Z2XVq~T$
for (int j = data.length - 1; j > i; j--) { JZ}zXv
if (data[j] < data[lowIndex]) { 7&id(&y/
lowIndex = j; CbZ;gjgY*
} aj4ZS
} k~)CJ6}
SortUtil.swap(data,i,lowIndex); B2NIV7
} F > rr.
} &$XTe2
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} #H6YI3
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Shell排序: ?GX@&_
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package org.rut.util.algorithm.support; "`;-5d g
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import org.rut.util.algorithm.SortUtil; e#hg,I
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/** g{Av
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* @author treeroot )"?'~ 5A
* @since 2006-2-2 s/ABT.ZO
* @version 1.0 Gd|kAC
g
*/ `a52{Wa
public class ShellSort implements SortUtil.Sort{ Ab[o~X"
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/* (non-Javadoc) -~c-mt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) COsy.$|4
*/ dA~_[x:Z
public void sort(int[] data) { 8AW}7.<5
for(int i=data.length/2;i>2;i/=2){ Rk5#5R n
for(int j=0;j insertSort(data,j,i); t<dFH}U`w
} <cZ/_+H%C
} .RmFYV0,
insertSort(data,0,1); ITl>HlS
} >NPK;Vu
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/** `}`Q qv
* @param data 0e&&k
* @param j X>
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* @param i rI\5djiYJ
*/ Jqzw94
private void insertSort(int[] data, int start, int inc) { (Zx--2lc
int temp; +-b'+mF
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); &KBDrJEX
} 8VG}-
} iOfO+3'Z_U
} ;07$ G+['
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} pq]z%\$u
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快速排序: t]Ln(r
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package org.rut.util.algorithm.support; 4<tbZP3/6)
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import org.rut.util.algorithm.SortUtil; v.*fJ
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/** F3vywN1$,
* @author treeroot 6|'7Mr~\
* @since 2006-2-2 ELV~
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* @version 1.0 }fk3a9j9u
*/ NRG06M
public class QuickSort implements SortUtil.Sort{ )?OdD7gd
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/* (non-Javadoc) l?IeZisX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,<!*@xy7v
*/ u(yN81
public void sort(int[] data) { H!0m8LCnb
quickSort(data,0,data.length-1); 0827z
} T~$Eh6
D
private void quickSort(int[] data,int i,int j){ &ZMQ]'&
int pivotIndex=(i+j)/2; ~tTn7[!
file://swap (e5Z^9X
SortUtil.swap(data,pivotIndex,j); FZ%h7Oe
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int k=partition(data,i-1,j,data[j]); h}'Hst
SortUtil.swap(data,k,j); &?Erkc~#
if((k-i)>1) quickSort(data,i,k-1); u0<yGsEGD
if((j-k)>1) quickSort(data,k+1,j); JFc,f
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} _vb'3~'S
/** I)#8}[vK
* @param data 2o9B >f&g
* @param i x0%m}P/
* @param j 8EkzSe
* @return ^HR8.9^[1u
*/ ZJcX-Z!\
private int partition(int[] data, int l, int r,int pivot) { N LQ".mM+
do{ )N~ p4kp
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); *k#"@
SortUtil.swap(data,l,r); &QD)1b[U
} N;YFr
while(l SortUtil.swap(data,l,r); l="X|t
return l; zJ(DO>,p&
} Kyk{:UnI
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} OAiW8BAe
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改进后的快速排序: a;KdkykG
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package org.rut.util.algorithm.support; Iv3yDL;
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import org.rut.util.algorithm.SortUtil; ct|0zl~
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/** <Qv/#
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* @author treeroot W;R6+@I[
* @since 2006-2-2 ?kZ-,@h:
* @version 1.0 zRLJ|ejMP
*/ 'ParMT
public class ImprovedQuickSort implements SortUtil.Sort { *2~WP'~PQd
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private static int MAX_STACK_SIZE=4096; T?[;ej:
private static int THRESHOLD=10; R0#scr
/* (non-Javadoc) I:oEt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *)B \M>
*/ !nJl.Y$
public void sort(int[] data) { t {1 [Ip
int[] stack=new int[MAX_STACK_SIZE]; i"
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S
int top=-1; #l&*&R~>
int pivot; [S]q'c)
int pivotIndex,l,r; ??B!UXi4R
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stack[++top]=0; kR^">s/H#
stack[++top]=data.length-1; 9&zR
i
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while(top>0){ W\Sc ak>
int j=stack[top--]; " v
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int i=stack[top--]; '^WR5P<8c
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pivotIndex=(i+j)/2; dVMl;{
pivot=data[pivotIndex]; Nlm}'Xt
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SortUtil.swap(data,pivotIndex,j); ,MJddbcg
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file://partition Rl0"9D87z
l=i-1; (JdheCq!x
r=j; S?i^ ~
do{ p(I^Y{sGI
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); @V^.eVM\R
SortUtil.swap(data,l,r); cy
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} ^)Y3V-@t
while(l SortUtil.swap(data,l,r); O,^s)>c
SortUtil.swap(data,l,j); *wmkcifF;
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if((l-i)>THRESHOLD){ \pK&gdw
stack[++top]=i; 5 z3WRg
stack[++top]=l-1; ./7-[d
} }0H<G0
if((j-l)>THRESHOLD){ U)-aecB!
stack[++top]=l+1; "N&ix*($
stack[++top]=j; qR2cRepV
} />9`Mbg[G
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} \j)c?1*$
file://new InsertSort().sort(data); o8E<_rei
insertSort(data); W"#<r
} twldwuN
/** FO!0TyQ
* @param data `'r]Oe
*/ 5"U5^6:T
private void insertSort(int[] data) { hTby:$aCg
int temp; &"tQpw5
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); qx >Z@o
} u}R|q
} ~PF,[$?4n
} k8}'@w
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} [.$%ti*!
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归并排序: H|?r_Ns
y}U'8*,
package org.rut.util.algorithm.support; GP^^
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import org.rut.util.algorithm.SortUtil; !m_y@~pV#u
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/** Avljrds+7
* @author treeroot r_'];
* @since 2006-2-2 \Z%_dT}
* @version 1.0 Ug gg!zA
*/ 1#>uqUxah
public class MergeSort implements SortUtil.Sort{ PDgZb
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/* (non-Javadoc) ZS_
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |z}VP-L
*/ <7ag=IgDy
public void sort(int[] data) { XNvlx4
int[] temp=new int[data.length]; KV{
mergeSort(data,temp,0,data.length-1); >K%+h)%kI
} jM{5nRQ
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private void mergeSort(int[] data,int[] temp,int l,int r){ brCL"g|}
int mid=(l+r)/2; V5jy,Qi)
if(l==r) return ; =7~;*Ts
mergeSort(data,temp,l,mid); 3ox|Mz<aZX
mergeSort(data,temp,mid+1,r); E`wq`g`H<
for(int i=l;i<=r;i++){ kOel
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temp=data; ?6MUyH]a
} 90<a'<\|
int i1=l; e<u~v0rDl
int i2=mid+1; {FN4BC`3+
for(int cur=l;cur<=r;cur++){ _t X1z^
if(i1==mid+1) <\
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data[cur]=temp[i2++]; CA/Lv{[2
else if(i2>r) XzBl }4s
data[cur]=temp[i1++]; q?0&0
else if(temp[i1] data[cur]=temp[i1++]; H5gcP11r
else m{yq.H[X
data[cur]=temp[i2++]; e&<=+\ul
} E|VTbEYG
} .36]>8
1l}fX}5%I;
} u@4khN:
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改进后的归并排序: \tU[,3
?Bd6<F-G
package org.rut.util.algorithm.support; d8^S~7
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import org.rut.util.algorithm.SortUtil; p<RIvSqM
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/** TPi{c_
]
* @author treeroot 8(-N;<Ef2
* @since 2006-2-2 lp1GK/!s
* @version 1.0 Qer}eg`R
*/ RE;)#t?K
public class ImprovedMergeSort implements SortUtil.Sort { J>0RN/38o
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private static final int THRESHOLD = 10; 3`njQvI\
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/* '81WogH:
* (non-Javadoc) ;'4Kg@/
* n1y*`5!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !!v9\R4um
*/ @l~MY*hp
public void sort(int[] data) { 6?l|MU"Q.
int[] temp=new int[data.length]; B}d)e_uLj
mergeSort(data,temp,0,data.length-1); Vf$q3X
} zj;KtgcE
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private void mergeSort(int[] data, int[] temp, int l, int r) { o{MmW~/o&
int i, j, k; ]Mgxv>zRbs
int mid = (l + r) / 2;
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if (l == r) 4~0@(3
return; aN"dk-eK
if ((mid - l) >= THRESHOLD) %T~LK=m
mergeSort(data, temp, l, mid); 6p~8(-nG
else fSm|anuKZe
insertSort(data, l, mid - l + 1); U 0dhr; l
if ((r - mid) > THRESHOLD) l]geQl:7`r
mergeSort(data, temp, mid + 1, r); pIvr*UzY
else _I#a`G
insertSort(data, mid + 1, r - mid); 2PVQSwW:
!4fT<V(
for (i = l; i <= mid; i++) { !;&{Q^}
temp = data; 4]ETF+
} qyY]:
(8
for (j = 1; j <= r - mid; j++) { #}nDX4jI
temp[r - j + 1] = data[j + mid]; M{`uI8vD
} LhtA]z,m
int a = temp[l]; kwpbg Q
int b = temp[r]; .OvH<%g!.
for (i = l, j = r, k = l; k <= r; k++) { 2[Bw+<YA`
if (a < b) { ]*yUb-xY
data[k] = temp[i++]; hkvymHaG
a = temp; p!p:LSk"/b
} else { &v&e-|r8;
data[k] = temp[j--]; :3 By7BZgj
b = temp[j]; N/eFwv.Er
} @"BkLF
} fTV}IP
} G297)MFF
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/** a3E.rr;b
* @param data U
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* @param l 4lF?s\W:
* @param i mu&%ph=
*/ kZH IzU
private void insertSort(int[] data, int start, int len) { `>skcvkm
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); bWfT-Jewh
} >R2o7~
} >iFi~)i_4y
} @N+6qO}
} CC{{@
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堆排序: qb7ur;
PitDk
1T
package org.rut.util.algorithm.support; 3q:>NB<
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import org.rut.util.algorithm.SortUtil; ?UV!^w@L:0
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/** ZH8Oidj`
* @author treeroot ""u>5f
* @since 2006-2-2 137:T:
* @version 1.0 KeE)9e
*/ 6`sS8Ar&u
public class HeapSort implements SortUtil.Sort{ s!F`
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'AJlkLqm#>
/* (non-Javadoc) 4WZ"8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! )PV-[2
*/ 2g:V_%
public void sort(int[] data) { Vo:Gp
MaxHeap h=new MaxHeap(); =6LF_=}
h.init(data); k&SI-jxj
for(int i=0;i h.remove(); 6F4OISy%3
System.arraycopy(h.queue,1,data,0,data.length); ;$$.L
bb8
} \?rBtD(
v\b@;H`
private static class MaxHeap{ !Au 9C
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void init(int[] data){ m(?ZNtBQt
this.queue=new int[data.length+1]; ^=V b'g3P~
for(int i=0;i queue[++size]=data; UCF'%R
fixUp(size); }qn@8}
} z;d]=PT
} leomm+f^
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private int size=0; 9$oU6#U,h
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private int[] queue; F F7
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public int get() { K\a=bA}DG
return queue[1]; $wx)/t<
} X9oxni#
P]b *hC
public void remove() { An0Zg'o!G
SortUtil.swap(queue,1,size--); ri?>@i-9=
fixDown(1); Zr
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} Q1?09
file://fixdown ?YTngIa
private void fixDown(int k) { Yl!~w:O!o
int j; 6I`Lszs
while ((j = k << 1) <= size) { DsZBhjCB
if (j < size %26amp;%26amp; queue[j] j++; 3
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if (queue[k]>queue[j]) file://不用交换 Hp!c\z;
break; ,
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SortUtil.swap(queue,j,k); }g\1JSJ%H
k = j; ohPCYt
} ;mw$(ZKa#
} p2Fff4nQ
private void fixUp(int k) { vOl<
while (k > 1) { @CJ`T&
int j = k >> 1; VkChRzhC
if (queue[j]>queue[k]) 6*]g~)7`Q~
break; >|S&@<
SortUtil.swap(queue,j,k); d|RqS`h
]
k = j; =T0;F0@#4
} fI([vI
} WzwH;!
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} #uzp
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c*A
} ^UEExjf
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SortUtil: f1_b``M
ZWH9E.uj
package org.rut.util.algorithm; hhU:
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import org.rut.util.algorithm.support.BubbleSort; qij<XNZU"&
import org.rut.util.algorithm.support.HeapSort; yD-L:)@"
import org.rut.util.algorithm.support.ImprovedMergeSort; +%%Ef]
import org.rut.util.algorithm.support.ImprovedQuickSort; (WISf}[l;
import org.rut.util.algorithm.support.InsertSort; v3ky;~ke
import org.rut.util.algorithm.support.MergeSort; ~5Cid)Q}@o
import org.rut.util.algorithm.support.QuickSort; e2X\ll
import org.rut.util.algorithm.support.SelectionSort; sG6ts,={
import org.rut.util.algorithm.support.ShellSort; :47bf<w|Y
G'M;]R9EP
/** d}Y\;'2,
* @author treeroot ip`oL_c
* @since 2006-2-2 *@zh
* @version 1.0 XJ3p<
*/ -szSA
public class SortUtil { +=:*[JEK,U
public final static int INSERT = 1; b-+~D9U<
public final static int BUBBLE = 2; ;
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public final static int SELECTION = 3; R|&Rq(ow"
public final static int SHELL = 4; \@}G'7{
public final static int QUICK = 5; '=Z]mi/aw
public final static int IMPROVED_QUICK = 6; PXRkK63
public final static int MERGE = 7; t{ R\\j
public final static int IMPROVED_MERGE = 8; WE*L=_zDS
public final static int HEAP = 9; h|T_
k
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public static void sort(int[] data) { @X?7a]+;8
sort(data, IMPROVED_QUICK); 3hi0
} DT Cwf
private static String[] name={ sgGXj7
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" cOq'MDr
}; z[0+9=<Y
>]!8f?,
private static Sort[] impl=new Sort[]{ R_7[7/a
new InsertSort(), +&*D7A>~p
new BubbleSort(), sMn)[k
vX
new SelectionSort(), 2&,jO+BqE@
new ShellSort(), _&wrA3@/L
new QuickSort(), R[#vFQ
new ImprovedQuickSort(), p|gzU$FWbk
new MergeSort(), dKk#j@[n"
new ImprovedMergeSort(), 'e(]woe
new HeapSort() ms]r1x"
}; IW{}l=D/
y v58~w*"
public static String toString(int algorithm){ @,:6wKMc
return name[algorithm-1]; (2J\o
} \2c3Nsra
q^ w@l
public static void sort(int[] data, int algorithm) { #lY_XV.
impl[algorithm-1].sort(data); "M!]t,?S
} m}$7d5
3!u`PIQv
public static interface Sort { _t/~C*=:=
public void sort(int[] data); */6lyODf
} ~z kzuh
7@1GSO: Yf
public static void swap(int[] data, int i, int j) { ;xl0J*r
int temp = data; DuMzK%
data = data[j]; >lV'}0u)
data[j] = temp; )
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} 11((b
} `6:B0-r