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。 Z~ ?:r
插入排序: %4 SREq
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package org.rut.util.algorithm.support; M8[YW|VkP
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import org.rut.util.algorithm.SortUtil; :m&`bq
/** W$'pUhq\H
* @author treeroot C9=f=sGL
* @since 2006-2-2 J $e.$ah;
* @version 1.0 MT6kJDyLu
*/ ,o9)ohw
public class InsertSort implements SortUtil.Sort{ #eUfwd6.Y
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/* (non-Javadoc) pK'WJ
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r`;C9#jZ
*/ Z$ftG7;P0
public void sort(int[] data) { ^7"%eWT`
int temp; raqLXO!j
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 3$Is==>7
} 21o_9=[^
} }qKeX4\-
} \Flq8S /t^
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} fwq|8^S@
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冒泡排序: ZH0f32K
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package org.rut.util.algorithm.support; p9s~WD/K
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import org.rut.util.algorithm.SortUtil; 8m1zL[.8g
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/** ##s!-.T
* @author treeroot z9'0&G L
* @since 2006-2-2 +%<Jr<~W
* @version 1.0 aJ}sYf^
*/ X~DXx/9
public class BubbleSort implements SortUtil.Sort{ ;
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EmUxM_T/2
/* (non-Javadoc) :_aY:`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yBe/UFp+
*/ N|~&Q!A&
public void sort(int[] data) { ZGbZu
int temp; *C:+N>
for(int i=0;i for(int j=data.length-1;j>i;j--){ s Y6'y'a95
if(data[j] SortUtil.swap(data,j,j-1); p!a%*LfND
} s{,e^T
} rx;U/)~#<
} nB]Q^~jX
} v8@dvT<
7wqwDE
} IW1\vfe
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选择排序: y?JbJ
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package org.rut.util.algorithm.support; m2! 7M%]GC
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import org.rut.util.algorithm.SortUtil; b910Z?B^L
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/** =_H39)|T
* @author treeroot D1n2Z:9
* @since 2006-2-2 3aqmK.`H
* @version 1.0 &f yFUg
*/ &wuV}S7
public class SelectionSort implements SortUtil.Sort { %aKkk)s
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/* mr1}e
VM~!
* (non-Javadoc) y|dXxd9
* uqUo4z 5T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z:v1?v
*/ _UBI,Dg]
public void sort(int[] data) { N 93E;B
int temp; _tk5?9Ykn
for (int i = 0; i < data.length; i++) { vck$@3*
int lowIndex = i; nAg(lNOWN
for (int j = data.length - 1; j > i; j--) { zoJ;5a.3B
if (data[j] < data[lowIndex]) { K;qZc\q
lowIndex = j; PWMaB
} j VZi_de
} )|{{}w~`
SortUtil.swap(data,i,lowIndex); .+Ej%|l%
} duS #&w
} r+\z0_'
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} gJ&!w8v.
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Shell排序: x/7G0K2\}
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package org.rut.util.algorithm.support; vdm?d/0(^
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import org.rut.util.algorithm.SortUtil; (M+<^3c
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/** YfPo"uxx
* @author treeroot #:|Y(,c
* @since 2006-2-2 cDiz!n*.q
* @version 1.0 +29\'w,
*/ `0i3"06lr
public class ShellSort implements SortUtil.Sort{ )DmiN ^:
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/* (non-Javadoc) lX*;KHT )
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) swlWe}1
*/ k&/)g3(N(
public void sort(int[] data) { IDh`0/i]
for(int i=data.length/2;i>2;i/=2){ Zir`IQ$
for(int j=0;j insertSort(data,j,i); N%f!B"NQ
}
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} D-GU"^-9
insertSort(data,0,1); H/k W
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} n@;x!c< +
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/** !C#RW=h9
* @param data C._sgO
* @param j eeU$uR
* @param i @MB _gt)7?
*/ _vdxxhJ=P3
private void insertSort(int[] data, int start, int inc) { 4Aew
)
int temp; n^\;*1%$c@
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); &=Zg0Q
} />Vx*^u8Hz
} }4]<P
} F2$bUY
<%D"eD
} 2<G1'7)
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快速排序: qffSq](D.
nV3
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package org.rut.util.algorithm.support; Tr0V6TS7
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import org.rut.util.algorithm.SortUtil; 9S%gVNxn
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/** 8 tygs
* @author treeroot 'd^gRH<z
* @since 2006-2-2 9r nk\`E
* @version 1.0 em[F|
*/ -1
public class QuickSort implements SortUtil.Sort{ L"h@`3o|
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/* (non-Javadoc) U%DF!~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bh,)5E^m
*/ IZ0$=aB7
public void sort(int[] data) { En9]x"_
quickSort(data,0,data.length-1); J7ekIQgR
} SMO%sZ]
private void quickSort(int[] data,int i,int j){ wDSUMB<?
int pivotIndex=(i+j)/2; m"(d%N7
file://swap {[5L96RH%
SortUtil.swap(data,pivotIndex,j); G'2=jHzMF
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int k=partition(data,i-1,j,data[j]); =O#AOw`
SortUtil.swap(data,k,j); rz}l<t~H
if((k-i)>1) quickSort(data,i,k-1); 0BB@E(*
if((j-k)>1) quickSort(data,k+1,j); 6
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NWHH.1|
} Q|B|#?E==
/** tOg
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* @param data [A9,!YY
* @param i sV^h#g~Zb
* @param j p/1}>F|i
* @return pLQSG}N
*/ )L<?g!j~
private int partition(int[] data, int l, int r,int pivot) { Z4AAg
do{ 1O2h9I$bk
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); %DRy&k/T
SortUtil.swap(data,l,r); 2^bpH%
} bp>ps@zFq
while(l SortUtil.swap(data,l,r); ; G59}d
p~
return l; tOM3Gs~o6z
} 4@]xn
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} {vT55i<mk
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改进后的快速排序: to!W={S<ol
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package org.rut.util.algorithm.support; e#6&uFce
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import org.rut.util.algorithm.SortUtil; $',GkK{NX
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/** R;E"Qdt
* @author treeroot g<iwxF
* @since 2006-2-2 03QEXm~|Q
* @version 1.0 !+A"Lej
*/ Dd#
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public class ImprovedQuickSort implements SortUtil.Sort { Hx2j=Q_dw
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private static int MAX_STACK_SIZE=4096; Ef`5fgp?
S
private static int THRESHOLD=10; sK 1m9
/* (non-Javadoc) +:"6`um|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) { 1@4}R4
*/ ^[seK)S=
public void sort(int[] data) { r$r&4dY
int[] stack=new int[MAX_STACK_SIZE]; k~jKJb-_
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int top=-1; aC,vh1")F
int pivot; < k+fKl
int pivotIndex,l,r; e.}3OK
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stack[++top]=0; RC8)f8n
stack[++top]=data.length-1; ^KZAYB9C
*)NR$9lGv
while(top>0){ B)DC,+@$
int j=stack[top--]; <Id1:
int i=stack[top--]; F/h :&B:;
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pivotIndex=(i+j)/2; V"7<[u]K|
pivot=data[pivotIndex]; < R|)5/9
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SortUtil.swap(data,pivotIndex,j); 2-6.r_
[^U;
file://partition pKxX{i1l
l=i-1; y/@;c)1b9
r=j; /+4^.Q*
do{ FU5LYXCs
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Z9"{f)T
SortUtil.swap(data,l,r); \2R`q*a+
} 4h;f>BG
while(l SortUtil.swap(data,l,r); z[5Y
Z~}*
SortUtil.swap(data,l,j); [/AdeR
P^b:?%
if((l-i)>THRESHOLD){ yul<n>X|
stack[++top]=i; 0r0\b*r
stack[++top]=l-1; Uin k
} ?v"K1C1.
if((j-l)>THRESHOLD){ 7#Uz*G\iZ
stack[++top]=l+1; hB
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stack[++top]=j; C`2*2Y%xkG
} 'z +$3\5L
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} >?>u bM`,
file://new InsertSort().sort(data); +Q SxYV
insertSort(data); uv|eVT3jNs
} %UUp=I
/** Ok}{jwJ%W;
* @param data ReI=4Jq11
*/ N?a1sdR
private void insertSort(int[] data) { P&[F t)`
int temp; NIGB[2V(
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); mh
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} $ ]W[y=
} LsJs Q
h
} d`?U!?Si
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} `W"a!,s2
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归并排序: J.bFv/R
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package org.rut.util.algorithm.support; 7m|`tjQ1
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import org.rut.util.algorithm.SortUtil; zj~nnfoys
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/** !paN`Fz\a
* @author treeroot .N5hV3
* @since 2006-2-2 i"%JFj_G
* @version 1.0 uQ[vgNe*m
*/ wO^$!zB W
public class MergeSort implements SortUtil.Sort{ i7S>RB
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/* (non-Javadoc) f$1Gu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CN\|_y
*/ K/f>f; c
public void sort(int[] data) { FF%\gJ
int[] temp=new int[data.length]; hFsA_x+L;
mergeSort(data,temp,0,data.length-1); jzl?e[qPA
} aUypt(dv
qhV,u;\.
private void mergeSort(int[] data,int[] temp,int l,int r){ :`+|'*b(A
int mid=(l+r)/2;
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if(l==r) return ; 9GMH*=3[=
mergeSort(data,temp,l,mid); 1.Haf
mergeSort(data,temp,mid+1,r); t{/:( Nu
for(int i=l;i<=r;i++){ p!HPp Ef+#
temp=data; iEiu%T>
} W<\ kf4Y
int i1=l; r+t ,J|V
int i2=mid+1; c=b+g+*xd
for(int cur=l;cur<=r;cur++){ `Mg8]H~
if(i1==mid+1) ZhhI@_sz
data[cur]=temp[i2++]; zW%>"y
else if(i2>r) 5~@?>)TBv
data[cur]=temp[i1++]; %/UV_@x&
else if(temp[i1] data[cur]=temp[i1++]; EX[B/YH
else Dh
hG$
data[cur]=temp[i2++]; '8s>rH5[V
} 0zg 2g!lh
} XMt
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} u|(Ux~O
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改进后的归并排序: w+t# Yb\7
c:=7lI
package org.rut.util.algorithm.support; `%$8cZ-kr
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import org.rut.util.algorithm.SortUtil; GxYW4b
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/** <_"B}c/2$
* @author treeroot Gx.P]O 3
* @since 2006-2-2 }czsa_
* @version 1.0 L/H v4={
*/ _,DO~L
public class ImprovedMergeSort implements SortUtil.Sort { 4cott^K.
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private static final int THRESHOLD = 10; DW1@<X
Kb^>X{
/* ki\B!<uv
* (non-Javadoc) TG1P=g5h
* ec`bz "1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,%A)"doaG
*/ bRWIDPh
public void sort(int[] data) { t(}/g
int[] temp=new int[data.length]; A[RHw<
mergeSort(data,temp,0,data.length-1); GHv{
} Vd,' s
#X#8ynt
private void mergeSort(int[] data, int[] temp, int l, int r) { W0Ktw6
int i, j, k; 9Hu
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int mid = (l + r) / 2; ]53O}sH>
if (l == r) tC^ 1}
return; '9 'l=Sh
if ((mid - l) >= THRESHOLD) gXLCRn!iR
mergeSort(data, temp, l, mid); @zo7.'7P
else G;/Q>V
insertSort(data, l, mid - l + 1); 34z_+
if ((r - mid) > THRESHOLD) "\7 v
mergeSort(data, temp, mid + 1, r); G@9u:\[l
else 5B1G?`]?
insertSort(data, mid + 1, r - mid); NeHx2m+
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for (i = l; i <= mid; i++) { P^"R4T
temp = data; M ~als3
} H#+\nT2m
for (j = 1; j <= r - mid; j++) { jk )Vb
temp[r - j + 1] = data[j + mid]; 3S5^`Ag#
} ZI,j?i6\
int a = temp[l]; y`4{!CEyLW
int b = temp[r]; ;> DHD*3X
for (i = l, j = r, k = l; k <= r; k++) { }<=3W5+
if (a < b) { W]_g4,T>
data[k] = temp[i++]; rOW;yJ[
a = temp; Kv}k*A% S
} else { %MN.O-Lc
data[k] = temp[j--]; W@^J6sH
b = temp[j]; fe|g3>/|
} >:2}V]/;
} $0#6"urG
} P'sfi>A
s
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/** b4CF`BG
* @param data I FsE!oDs4
* @param l
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* @param i H8&p<=
*/ A;,Dg=FL/
private void insertSort(int[] data, int start, int len) { L?8^aG
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); E tx`K5Tr]
} #1[z;Mk0
} *<IR9.~{6%
} Tr%FUi
} &iNS?1a%f=
gXt O*Rfqk
堆排序: h$pk<<
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package org.rut.util.algorithm.support; !4t`Hv?'
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import org.rut.util.algorithm.SortUtil; B!}BM}r
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/** X'x3esw w
* @author treeroot \,R!S /R#
* @since 2006-2-2 MU1E_"Z)
* @version 1.0 1[ SA15h
*/ -IU4#s
public class HeapSort implements SortUtil.Sort{ s)ky/ce
)t%h[0{{
/* (non-Javadoc) RDJ+QOVKg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oxfF`L"
*/ <B)
public void sort(int[] data) { /;l[I=VI
MaxHeap h=new MaxHeap(); fagM7)x
h.init(data); #Ao !>qCE
for(int i=0;i h.remove(); 1[-vD=
System.arraycopy(h.queue,1,data,0,data.length); 9Kbw
GmSU
} Lc]1$
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private static class MaxHeap{ fQU{SjG
tuxRVV8l
void init(int[] data){ v L}T~_=3
this.queue=new int[data.length+1]; tuLH}tkNY
for(int i=0;i queue[++size]=data; u1^\MVO8
fixUp(size); ?YBaO,G9o
} ]g,lRG
} J\=a gQ
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private int size=0; L^FcS\r;
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private int[] queue; !n<o)DsZR
E(4w5=8TI
public int get() { uv]{1S{tb
return queue[1]; s8vKKvs`9
} \|%E%Yc
OCNPi4
public void remove() { BvK QlT
SortUtil.swap(queue,1,size--); I9&lO/c0
fixDown(1); dJi|D
} E^wyD-ii/
file://fixdown 3v1 7"
private void fixDown(int k) { Y:psZ
int j; ((<`zx
while ((j = k << 1) <= size) { ()\jCNLT
if (j < size %26amp;%26amp; queue[j] j++; 9I.^LZ"
if (queue[k]>queue[j]) file://不用交换 yMxTfR
break; B!;+_%P76
SortUtil.swap(queue,j,k); "IFgRaP=
k = j; / t5p-
} ]Blf9h7
} 4h8*mMghs
private void fixUp(int k) { bL`eiol6
while (k > 1) { ? ?[g}>
int j = k >> 1; z%sy$^v@vD
if (queue[j]>queue[k]) I[D8""U
break; M0w/wt|
SortUtil.swap(queue,j,k); {C")#m-0
k = j; rN5tI.iC
} E\M-k\cSj
} BBnq_w"a
7-*=|gl+
} +,5-qm)Gh>
%
frfSGf.#
} Sh&PNJ-*
g"K>5Cb
SortUtil: a#[-*ou`
3FNT|QF
package org.rut.util.algorithm; |=K_F3aJ
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import org.rut.util.algorithm.support.BubbleSort; #;Tz[0
import org.rut.util.algorithm.support.HeapSort; 4W;S=#1
import org.rut.util.algorithm.support.ImprovedMergeSort; (Rd$VYuf
import org.rut.util.algorithm.support.ImprovedQuickSort; `A)"%~
import org.rut.util.algorithm.support.InsertSort; h<x4YB5Mj
import org.rut.util.algorithm.support.MergeSort; wCCV2tk
import org.rut.util.algorithm.support.QuickSort;
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y 1
import org.rut.util.algorithm.support.SelectionSort; 2@khSWV
import org.rut.util.algorithm.support.ShellSort; 4kl Ao$
i9 A ~<
/** [4Q"#[V&9
* @author treeroot :O-1rD
* @since 2006-2-2 $yu?.b
9H#
* @version 1.0 ub K7B |p
*/ rv7{Ow_Y
public class SortUtil { z|N3G E(.@
public final static int INSERT = 1; rHz||jjU
public final static int BUBBLE = 2; Q5a)}6-5
public final static int SELECTION = 3; yI3kvh
public final static int SHELL = 4; BRv x[u
public final static int QUICK = 5; d@ Ja}`
public final static int IMPROVED_QUICK = 6; |E3X
public final static int MERGE = 7; ynwG\V
public final static int IMPROVED_MERGE = 8; X}A'Cg0y
public final static int HEAP = 9; ST dNM\+
~Z)/RT/
public static void sort(int[] data) { GTl
xq%?b
sort(data, IMPROVED_QUICK); ](jFwxU
} =#xK=pRy;
private static String[] name={ '0Q,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap"
QLKK.]
}; HM9fjl[
ej(ikj~j
private static Sort[] impl=new Sort[]{ <AoXEuD
new InsertSort(), @n+=vC.xO
new BubbleSort(), >m6&bfy\q
new SelectionSort(), y 1\'(1
new ShellSort(), &
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new QuickSort(), z=Cr7-
new ImprovedQuickSort(), mUoIJ3fv_,
new MergeSort(), 5:.{oSy7n
new ImprovedMergeSort(), vbG]mMJ
new HeapSort() |j~lkzPnV
}; ~bK9R0|<
p&b5% 4P
public static String toString(int algorithm){ PnYBy| yl
return name[algorithm-1]; H17-/|-;0!
} .qv'6G
+&=?BC}L9^
public static void sort(int[] data, int algorithm) { m#7*:i&@Y
impl[algorithm-1].sort(data); }6u2*(TmD
} 8|^CK|m6*
{*m ?Kc7k
public static interface Sort { SPkn3D6
public void sort(int[] data); OFU/gaO~
} {KL5GowH
, X{>
public static void swap(int[] data, int i, int j) { Z u*K-ep"
int temp = data; sW@krBxMv
data = data[j]; 6<76H
data[j] = temp; ~NcQ1.
} @.C{OSHE
} BMyzjteS+