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。 <A<{,:5C
插入排序: 6BY-^"W5`
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; 3 j!3E
/** b_,|>U
* @author treeroot uXI_M)
* @since 2006-2-2 &K[_J
* @version 1.0 3t`P@nL0;
*/ J cg,#@
public class InsertSort implements SortUtil.Sort{ @En^wN
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/* (non-Javadoc)
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aHs^tPg
*/ {n(b{ibl
public void sort(int[] data) { =CK4.
int temp; 5j:0Yt
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); w<C#Bka
} h"Xg;(K
} g+DzscIT
} 9!f/aI
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} #%`|~%`{:
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冒泡排序: 'Hc-~l>D
y]2qd35u_A
package org.rut.util.algorithm.support; D5$wTI
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import org.rut.util.algorithm.SortUtil; 5 elw~u
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/** 6^%UU
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* @author treeroot LL] zT H0
* @since 2006-2-2 @WJgWJm
* @version 1.0 /nyUG^5#{
*/ /4t j3B,
public class BubbleSort implements SortUtil.Sort{
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/* (non-Javadoc) 4 d;|sI@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |w_7_J2
*/ WEFlV4/
public void sort(int[] data) { t]>Lh>G
int temp; &Q+Ln,(&L
for(int i=0;i for(int j=data.length-1;j>i;j--){ e@c0WlWa
if(data[j] SortUtil.swap(data,j,j-1); \x)n>{3C
} :Mb%A
} anIAM
} E8>Rui@9
} >G);j@Q
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} S7=Bd[4
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选择排序: el2bd
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package org.rut.util.algorithm.support; A{UULVp
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import org.rut.util.algorithm.SortUtil; {8 8 )~
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/** kdCUORMK
* @author treeroot kspTp>~
* @since 2006-2-2 thV>j9'
* @version 1.0 RMX:9aQ3F
*/ Sczc5FG
public class SelectionSort implements SortUtil.Sort { UQ'\7OS
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/* 8dV=[+
* (non-Javadoc) y|CP;:f;
* EPS={w$'s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :{qv~&+C
*/ ~vs}.kb
public void sort(int[] data) { sW)Zi
int temp; t0z!DOODZP
for (int i = 0; i < data.length; i++) { ~(x;5{
int lowIndex = i; T;@;R%
for (int j = data.length - 1; j > i; j--) { HHiT]S9
if (data[j] < data[lowIndex]) { W- i&sUgy
lowIndex = j; |3F02
} A6GE,FhsG
} 7w
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SortUtil.swap(data,i,lowIndex); f:ZAG4B
} ?g?L3vRK
} )\sc83L
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} hfnN@Kg?B}
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Shell排序: w:s]$:MA8
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package org.rut.util.algorithm.support; Y3r%B9~
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import org.rut.util.algorithm.SortUtil; NLS%S q
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/** m_=$0m J$
* @author treeroot ^dP KDrKxh
* @since 2006-2-2 RRmLd/(
* @version 1.0 T?:glp[4I
*/ d@ Y}SWTB
public class ShellSort implements SortUtil.Sort{ ]04e1F1J
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/* (non-Javadoc) \cC%!4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AK\$i$@6
*/ +|bmT
public void sort(int[] data) { AgV G`q
for(int i=data.length/2;i>2;i/=2){ ZZcEt
for(int j=0;j insertSort(data,j,i); R&|mdY8
} t<~ $
} D|rFu
insertSort(data,0,1); dY@WI[yog
} a["2VY6Eq@
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/** /rq VB|M
* @param data F;=4vS]\
* @param j "`M?R;DH
* @param i >tO`r.5u9
*/ nA
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private void insertSort(int[] data, int start, int inc) { L,mQ
int temp; Q2zjZC*'%
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); }
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} `D`sr[3n
} [[>wB[w
} x%+aKZ(m)
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} 2WtRJi?b|
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快速排序: >Y_*%QGH_
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package org.rut.util.algorithm.support; A,\6nO67
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import org.rut.util.algorithm.SortUtil; )Psb>'X
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/** KN7^:cC
* @author treeroot FDVcow*] n
* @since 2006-2-2 l5\"9 ,<
* @version 1.0 UNPezHaz
*/ 2zVJ vn7
public class QuickSort implements SortUtil.Sort{ 1AG=%F|.
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/* (non-Javadoc) AZa6Cw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F%i^XA]a*
*/ |tv"B@`
public void sort(int[] data) { jy giG&H
quickSort(data,0,data.length-1); =+-Yxh|*
} jeGj<m
private void quickSort(int[] data,int i,int j){ ]wKz E4Z/
int pivotIndex=(i+j)/2; "I=\[l8t
file://swap w3=%*<
SortUtil.swap(data,pivotIndex,j); AtF3%Zv2
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int k=partition(data,i-1,j,data[j]); ?[)}l9
SortUtil.swap(data,k,j); x~GQV^(l3
if((k-i)>1) quickSort(data,i,k-1); {"&SJt[%X
if((j-k)>1) quickSort(data,k+1,j); K'X2dG*
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} P(XaTU&-
/** s3]?8hXd
* @param data 9G{;?c
* @param i *xON W
* @param j Pu"R,a
* @return K4]g[z
*/ rS4@1`/R
private int partition(int[] data, int l, int r,int pivot) { vG;zJ#c
do{ IkrF/$r
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); hGbj0
SortUtil.swap(data,l,r); VQ0fS!5'
} +hE(Ra#
while(l SortUtil.swap(data,l,r); hSFn8mpXT
return l; 4O;OjUI0a
} _~rI+l A
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} ^|/](
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改进后的快速排序: ~=KJzOS,S
Ee@4 %/v
package org.rut.util.algorithm.support; >nw++[K_
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import org.rut.util.algorithm.SortUtil; ~(pmLZ<GW}
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/** 'v\L @"
* @author treeroot 7zHh@ B:]
* @since 2006-2-2 "TUe%o
* @version 1.0 W-.pmU e2
*/ :$_6SQ<?
public class ImprovedQuickSort implements SortUtil.Sort { -S$1Yn
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private static int MAX_STACK_SIZE=4096; $&<uT
private static int THRESHOLD=10; j'aHF#_
/* (non-Javadoc) +V{7")px6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8E4mA5@
*/ "=6v&G]U4
public void sort(int[] data) { E\IlF 6
int[] stack=new int[MAX_STACK_SIZE]; n+BJxu?
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int top=-1; 2*N_5&9mE
int pivot; om |"S
int pivotIndex,l,r; 4<cz--g
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stack[++top]=0; -0_d/'d
stack[++top]=data.length-1; IBQ@{QB
+&Hr4@pgW
while(top>0){ jMbC Y07v
int j=stack[top--]; o$[z],RO
int i=stack[top--]; Pl<;[cB
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pivotIndex=(i+j)/2; E[O<S B
I
pivot=data[pivotIndex]; n @?4b8"
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SortUtil.swap(data,pivotIndex,j); t9Y=m6
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file://partition b:R-mg.VT{
l=i-1; k51Eyy50(
r=j; ZkIgL
do{ +8v9flh
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); = <j"M85.
SortUtil.swap(data,l,r); N gLU$/y;
} _=q!
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while(l SortUtil.swap(data,l,r); wtT}V=_
SortUtil.swap(data,l,j); H)aQ3T4N5
etoo
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if((l-i)>THRESHOLD){ kl"+YF5/
stack[++top]=i; "*;;H^d
stack[++top]=l-1; /sr 2mt-Q
} @h*fFiY&{
if((j-l)>THRESHOLD){ HLBkR>e
stack[++top]=l+1; ?%VI{[y#>
stack[++top]=j; Ov#=]t5
} I+!:K|^
/s-A?lw^2
} >yXN,5d[
file://new InsertSort().sort(data); 2P]L9'N{Y
insertSort(data); CH
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} :>aQ~1f>]
/** `xz<>g9e
* @param data /
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*/ }lK3-2Pk
private void insertSort(int[] data) { gJ;_$`
int temp; L:(1ZS
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); .<z!3O&L
} dgDy5{_
} A].>.AI
} (ZL sB{r^
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} n39t}`WIl
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归并排序: R/^u/~<
`+t.!tv!
package org.rut.util.algorithm.support; l~D N1z6`
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import org.rut.util.algorithm.SortUtil; |A%<Z(
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/** J*l4|^i<
* @author treeroot (_4;') 9
* @since 2006-2-2 H"Klj_<dH0
* @version 1.0 ?=VOD #)
*/ p~ .8\bI=
public class MergeSort implements SortUtil.Sort{ hoT/KWD,
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/* (non-Javadoc) +525{Tj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Kf_z5tm:
*/ be e5
public void sort(int[] data) { /T,Z>R
int[] temp=new int[data.length]; RUr=fEH
mergeSort(data,temp,0,data.length-1); []0mX70N
} /)xlJUq
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private void mergeSort(int[] data,int[] temp,int l,int r){ BS&;n
int mid=(l+r)/2; Cda!Mk:
if(l==r) return ; \uME+NF
mergeSort(data,temp,l,mid); +[J/Zw0{
mergeSort(data,temp,mid+1,r); EZ.!rh~+
for(int i=l;i<=r;i++){ &20P,8@
temp=data; N)S!7%ne
} 341?0%=
int i1=l; 0wFH!s/B
int i2=mid+1; 2Bk$ lx7
for(int cur=l;cur<=r;cur++){ ;Nr ]X
if(i1==mid+1) AH4EtZC=W
data[cur]=temp[i2++]; -`f04_@>d
else if(i2>r) _U{([M>;
data[cur]=temp[i1++]; #{9G sD
else if(temp[i1] data[cur]=temp[i1++]; |!q$_at
else
@HBEt^!
data[cur]=temp[i2++]; ^E6d`2w-
} 'a^{=+
} pG^}Xf2a
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} =`Y.=RL+'n
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改进后的归并排序: ^uS/r#l
OG3/-K 8R
package org.rut.util.algorithm.support; b dJ+@r
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import org.rut.util.algorithm.SortUtil; @<M*qK1h
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/** -[OXSaf6
* @author treeroot Omi^>c4G
* @since 2006-2-2 ?EU\}N J
* @version 1.0 N~pIC2Woo
*/ r}u%#G+K,
public class ImprovedMergeSort implements SortUtil.Sort { I
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private static final int THRESHOLD = 10; tn|,O.t
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/* PuxK?bwC
* (non-Javadoc) k>E`s<3
* |3K)$.6~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .$",
*d
*/ x'Pi5NRE
public void sort(int[] data) { JaWv]@9*
int[] temp=new int[data.length]; 7n)&FXK`
mergeSort(data,temp,0,data.length-1); Fg/dS6=n`?
} wA`"\MWm
WxbsD S;
private void mergeSort(int[] data, int[] temp, int l, int r) { .[DthEF
int i, j, k; i`)!X:j
int mid = (l + r) / 2; tvX>{-M
if (l == r) Fv?=Z-wk
return; j%<}jw[2
if ((mid - l) >= THRESHOLD) 6AN)vs}
mergeSort(data, temp, l, mid); yBLUNIr
else }<MR`h1
insertSort(data, l, mid - l + 1); Pw@olG'Ah
if ((r - mid) > THRESHOLD) 5&CDHc7Oj
mergeSort(data, temp, mid + 1, r); rZ_>`}O2
else -~)OF
insertSort(data, mid + 1, r - mid); E?PGu!&u
.Qt4&B
for (i = l; i <= mid; i++) { Bn]K+h\E
temp = data; 7:h!Wj-a]
} ,J mbqOV?!
for (j = 1; j <= r - mid; j++) { !C:r b
temp[r - j + 1] = data[j + mid]; Q\{x)|{$
} &"uV~AM
int a = temp[l]; w W$(r-
int b = temp[r]; ovf/;Q/}
for (i = l, j = r, k = l; k <= r; k++) { WW@"Z}?k
if (a < b) { &jV_"_3n
data[k] = temp[i++]; ~9D~7UR
a = temp; ^_p%Yv
} else { }tST)=M`
data[k] = temp[j--]; ^T4Ay=~{
b = temp[j]; 2
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} h5|.Et
} 2aNT#J"_
} F5gObIJtuY
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/** WV kR56
* @param data iO!6}yJ*V
* @param l ++[5q+b
* @param i d]0a%Xh[
*/ W( *V2<$o
private void insertSort(int[] data, int start, int len) { Em13dem
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); N~=A
} [A~G-
} i cUT<@0
} *QE<zt
} Z&!!]"I
j?(!^ _!m
堆排序: 0?bA$y
9w;?-
package org.rut.util.algorithm.support; 5b#QYu
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import org.rut.util.algorithm.SortUtil; H5wb_yBQ+
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/** g?/XZ5$a5
* @author treeroot ){Mu~P
* @since 2006-2-2 SKXBrD=-
* @version 1.0 x.DzViP/
*/ "Q+83adY4x
public class HeapSort implements SortUtil.Sort{ s<T?pH
h.tY 'F
/* (non-Javadoc) Q]JX`HgPaU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &hZwZgV+3
*/ B(HT.%r^A
public void sort(int[] data) { <"&'>?8j
MaxHeap h=new MaxHeap(); t
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h.init(data); &m{'nRU}c
for(int i=0;i h.remove(); aSaAC7sFk
System.arraycopy(h.queue,1,data,0,data.length); u@ N~1@RT|
} k1N$+h
;\
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private static class MaxHeap{ gb-{2p>}
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void init(int[] data){ @Gjny BJ
this.queue=new int[data.length+1]; X,fu!
for(int i=0;i queue[++size]=data; eG]a zt
fixUp(size); p6 xPheD
} v"1Po_`
} =fG:A(v%}
J=WB6zi
private int size=0; setLdEi
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private int[] queue; cqL(^R.
8:g!w:$x
public int get() { -wr(vE,
return queue[1]; FRyPeZR
} -Wo15O"
Y_H/3?b%
public void remove() { Ky9W/dCR
SortUtil.swap(queue,1,size--); !sIwFv)
fixDown(1); ]rX9MA6
} sB7" 0M
file://fixdown o)]FtL:mm
private void fixDown(int k) { y$oW!
int j; i2F(GH?p[
while ((j = k << 1) <= size) { aw$Y`6,S
if (j < size %26amp;%26amp; queue[j] j++; xks?y.wA
if (queue[k]>queue[j]) file://不用交换 |4SW[>WT:
break; VuWib+fT
SortUtil.swap(queue,j,k); }C~]=Z
k = j; fD6GQ*
} emWGIo
} q.oLmX
private void fixUp(int k) { W);W.:F
while (k > 1) { ,{<Fz%
int j = k >> 1; ToU.mM?f^
if (queue[j]>queue[k]) #8?^C]*{0
break; };SV!'9s?~
SortUtil.swap(queue,j,k); YOw?'+8
k = j; :EB,{|m
} dB)[O9K)
} %,? vyY
#<#%>Y^
} ZgF/;8!~V-
76MsrOv55
} B7 c[4
vgk9b!Xd
SortUtil: 8eX8IR!K9
05)|"EX)
package org.rut.util.algorithm; l{EU_|q
`p|[rS>
import org.rut.util.algorithm.support.BubbleSort; (T;9us0
import org.rut.util.algorithm.support.HeapSort; |\{Nfm=:%
import org.rut.util.algorithm.support.ImprovedMergeSort; R+Lk~X^*l'
import org.rut.util.algorithm.support.ImprovedQuickSort; >l2w::l%
import org.rut.util.algorithm.support.InsertSort; >UN vkQ:
import org.rut.util.algorithm.support.MergeSort; hWxT !
import org.rut.util.algorithm.support.QuickSort; 84Zgo=P}
import org.rut.util.algorithm.support.SelectionSort; 5;
f\0<-
import org.rut.util.algorithm.support.ShellSort; Tk+DPp^
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/** )>$^wT
* @author treeroot ,>S+-L8
* @since 2006-2-2 b;{h?xc6
* @version 1.0 RZ6~c{
*/ @XBH.A^7r
public class SortUtil {
q)oN2-
public final static int INSERT = 1; cHEz{'1m
public final static int BUBBLE = 2; >Z"9rF2SW
public final static int SELECTION = 3; +S0u=u65
public final static int SHELL = 4; ,>w}xWSYpG
public final static int QUICK = 5; sRi %1r7
public final static int IMPROVED_QUICK = 6; \^s2W:c
public final static int MERGE = 7; 1*c>I@I;
public final static int IMPROVED_MERGE = 8; |Mlh;
public final static int HEAP = 9; A\g%
)[
b#g(Y(
public static void sort(int[] data) { @LC~*_y
sort(data, IMPROVED_QUICK); UT;4U;a,m
} ~,Mr0
private static String[] name={ xppkLoPK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ; +9(;
}; EE9vk*[@C
3{q[q#"
private static Sort[] impl=new Sort[]{ `oPLl0
new InsertSort(), aH^{Vv$]M@
new BubbleSort(), tQf!|]#J
new SelectionSort(), j@SYXKL~
new ShellSort(), 4tnjXP8
new QuickSort(), g-eq
new ImprovedQuickSort(), T0?uC/7H
new MergeSort(), nrbazyKm
new ImprovedMergeSort(), x/_dW
new HeapSort() oVEAlBm^v
}; <4$YO-:E
X#7}c5^Y
public static String toString(int algorithm){ PvuAg(?
return name[algorithm-1]; *k[kV
} _Z.;u0Zp8
khS/'b
public static void sort(int[] data, int algorithm) { /x
O{
.dr
impl[algorithm-1].sort(data); Vku#;:yUb^
} Un\Ubqi0
\gP. \
public static interface Sort { /pU|ZA.z'2
public void sort(int[] data); i\vpGlx
} Z?C4a}
w Oj88J)
public static void swap(int[] data, int i, int j) { >\&= [C
int temp = data; NkoofhZ
data = data[j]; W/a,.M
data[j] = temp; 7y>(H<^>
} pMDH
} $>(9~Yh0