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。 uo:J\ E
插入排序: 299H$$WS,Z
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package org.rut.util.algorithm.support; b1q"!+8y
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import org.rut.util.algorithm.SortUtil; >IafUy
/** te`$%NRl
* @author treeroot |T /ZL!
* @since 2006-2-2 yZ7&b&2nLn
* @version 1.0 (y'hyJo
*/ zC:ASt
public class InsertSort implements SortUtil.Sort{ b)#hSjWO#
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/* (non-Javadoc) 5&g@3j]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oamg]ST
*/ wVXS%4|v
public void sort(int[] data) { &<g|gsG`
int temp; f^ZRT@`O
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Rr$-tYy6
} 1UgEI"#a6g
} `cn#B
BV
} 2ACCh4(/P
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} Eh`7X=Z7E
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冒泡排序: ,^r9n[M4M
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package org.rut.util.algorithm.support; o#)C^xlQ
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import org.rut.util.algorithm.SortUtil; T.F!+
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/** ~Gp[_ %K
* @author treeroot .<?GS{6
N
* @since 2006-2-2 CT@ jZtg0
* @version 1.0 8,Z_{R#|
*/ ;a!S!%.h
public class BubbleSort implements SortUtil.Sort{ Rh2+=N<X
M7\szv\Zc=
/* (non-Javadoc) fm%t^)E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A|[?#S((]
*/ @u+]aI!`-
public void sort(int[] data) { FZQP%]FX
int temp; r r %V.r;2
for(int i=0;i for(int j=data.length-1;j>i;j--){ G>_*djUf
if(data[j] SortUtil.swap(data,j,j-1); LP^$AAy
} H'5)UX@LP
} uC vj!
} "!P3R1;%
} ~NgA
b6M[q_
} tFn)aa~L
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选择排序: `7Q<'oK
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package org.rut.util.algorithm.support; +^ac'Y)A
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import org.rut.util.algorithm.SortUtil; \w>y`\6mX
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/** Q} JOU
* @author treeroot Kn{4;Xk\
* @since 2006-2-2 QZwNw;$k*
* @version 1.0 hag$GX'2k
*/ c]-<vkpV
public class SelectionSort implements SortUtil.Sort { Ny7 S
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/* /<k/7TF`
* (non-Javadoc) (/YHk`v2
* 0o4XUW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Paq4
*/ $Wol?)z
public void sort(int[] data) { j_[tu!~
int temp; +E+p"7
for (int i = 0; i < data.length; i++) { z9Mfd#5?>P
int lowIndex = i; E~T-=ocKE
for (int j = data.length - 1; j > i; j--) { n6>#/eUH
if (data[j] < data[lowIndex]) { ]cvwIc">
lowIndex = j; 0auYG><=
} 9RL`<,Q
} aK~8B_5k8
SortUtil.swap(data,i,lowIndex); 8`{:MkXP
} :kV#y
} }#+^{P3 ;
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} {WS;dX4
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Shell排序: rXq.DvQ
c#]4awHU
package org.rut.util.algorithm.support; 3`?7<YJ
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import org.rut.util.algorithm.SortUtil; E=Bf1/c\
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/** B mb0cFQ
* @author treeroot ttQGoUkj
* @since 2006-2-2 MJ)RvNF
* @version 1.0
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*/ I][*j
public class ShellSort implements SortUtil.Sort{ v/plpNVp>
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/* (non-Javadoc) hfB%`x#akQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }v{LRRi
*/ $wa{~'
public void sort(int[] data) { Vp\,CuQ
for(int i=data.length/2;i>2;i/=2){ S13nL^=i
for(int j=0;j insertSort(data,j,i); G!##X: 6'
} 6|=f$a
} +=h:Vb8
insertSort(data,0,1); pllGB6X
} =XQ%t
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/** DCa^
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* @param data -i|}m++
* @param j Gz0]}]A
* @param i IP pN@
*/ `}\
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private void insertSort(int[] data, int start, int inc) { 8Fh)eha9f
int temp; U/M>?G~
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); q?:dCFw$x5
} &-w
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} tOD6&<
} /N.b%M]!
M_f:A
} 6@!`]tSCK
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快速排序: 0mVNQxHI
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package org.rut.util.algorithm.support; V0YZp
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import org.rut.util.algorithm.SortUtil; H?Wya.7
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/** kD%( _K5
* @author treeroot B6 ;|f'e!
* @since 2006-2-2 } OR+Io
* @version 1.0 j (d~aqW
*/ Ml5w01O
public class QuickSort implements SortUtil.Sort{ \)[j_^
& .j&0WE
/* (non-Javadoc) ^ytrK
Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JbbzV>
*/ ,0 sm
public void sort(int[] data) { qDIZJh
quickSort(data,0,data.length-1); U)gH}0n&
} e*C(q~PQ
private void quickSort(int[] data,int i,int j){ _VN?#J)o
int pivotIndex=(i+j)/2; 3"i-o$P
file://swap ]6`%
SortUtil.swap(data,pivotIndex,j); O bS3
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int k=partition(data,i-1,j,data[j]); ITBE|b
SortUtil.swap(data,k,j); p
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if((k-i)>1) quickSort(data,i,k-1); 3$R1ipb
if((j-k)>1) quickSort(data,k+1,j); e !Y~Qy
!pW0qX\1n
} T^KKy0ZGM
/** }0z)5c
* @param data SH$PwJ U
* @param i ~mxO7cy5Cg
* @param j 7}>E J
* @return ki!0^t:9
*/ =T@1@w
private int partition(int[] data, int l, int r,int pivot) {
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do{
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while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); \b x$i*
SortUtil.swap(data,l,r); kJ}`V
} ~0$&3a<n1
while(l SortUtil.swap(data,l,r); CTa57R
return l; oc`H}Wvn
} F41=b4/
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} yf+)6D -9n
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改进后的快速排序: o*H<KaX
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package org.rut.util.algorithm.support; +0Y&`{#Z
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import org.rut.util.algorithm.SortUtil; TeM|:o
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/** Xv^qVn4
* @author treeroot C'x&Py/#
* @since 2006-2-2 e"<OELA
* @version 1.0 i_%_ x*
*/ !|(NgzDP/
public class ImprovedQuickSort implements SortUtil.Sort { N6:`/f+A>T
1+s;FJ2}
private static int MAX_STACK_SIZE=4096; g-
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private static int THRESHOLD=10; 4hj|cCrO
/* (non-Javadoc) 4r}51 N\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?@86P|19
*/ ;Y, y 4{H3
public void sort(int[] data) { ~DwpoeYX
int[] stack=new int[MAX_STACK_SIZE]; e^voW"?%
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int top=-1; 2+XAX:YD
int pivot; ;V!D:5U
int pivotIndex,l,r; WyiQoN'q
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stack[++top]=0; 2>%=U~5
stack[++top]=data.length-1; HRA|q
x%B%f`]8
while(top>0){ GbI/4<)l}
int j=stack[top--]; a7opCmL
int i=stack[top--]; !nnC3y{G
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pivotIndex=(i+j)/2; $&c*'3
pivot=data[pivotIndex]; *.[.
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SortUtil.swap(data,pivotIndex,j); tw@X>
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file://partition ~n_HP_Kf?
l=i-1; He@KV=
r=j; UN#S;x*
do{ TWTb?HP
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); ccxNbU
SortUtil.swap(data,l,r);
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} i%?* @uj
while(l SortUtil.swap(data,l,r); *;FdD{+
SortUtil.swap(data,l,j); a<e[e>
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if((l-i)>THRESHOLD){ ~xTt204S
stack[++top]=i; Lg hfM"g
stack[++top]=l-1; u ga_T
} vY3h3o
if((j-l)>THRESHOLD){ A#,ZUOPGH
stack[++top]=l+1; fz_r7?
stack[++top]=j; .}+}8[p4l
} *-X[u:
%BODkc Zh
} PA*5Bk="q
file://new InsertSort().sort(data); !4!~Lk=
insertSort(data); bN.Pex
} -{vD:Il=6
/** kJR`:J3DJ
* @param data L~3Pm%{@A
*/ lB4WKn=?Kl
private void insertSort(int[] data) { 6S#Cl>v
int temp; 4qa.1j(R/
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); U<XG{<2
} "dlVk~
} x{n=;JD
} 7_t'( /yu
zQ PQ
} #-J>NWdt
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归并排序: e3\T)x&=
!,PWb3S
package org.rut.util.algorithm.support; !VpoZ
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import org.rut.util.algorithm.SortUtil; -?a 26o%e
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/** zuCSj~
* @author treeroot K sCyFp
* @since 2006-2-2 :!QAC@
* @version 1.0 L/[K"
*/ X8\GzNE~R
public class MergeSort implements SortUtil.Sort{ An@t?#4gxi
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/* (non-Javadoc) xSu >
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) B5QFK
*/ 5V-I1B&
public void sort(int[] data) { wIgS3K
int[] temp=new int[data.length]; Bw.i}3UT6
mergeSort(data,temp,0,data.length-1); 4p wH>1
} -\MG}5?!
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private void mergeSort(int[] data,int[] temp,int l,int r){ d(K+);!
int mid=(l+r)/2; v[<T]1=LRC
if(l==r) return ; Vvo7C!$z
mergeSort(data,temp,l,mid); 6u%&<")4HP
mergeSort(data,temp,mid+1,r); 4M T 7 `sr
for(int i=l;i<=r;i++){ 7p[n
temp=data; qP
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} '"Nr, vQo
int i1=l; ~ri5zb20
int i2=mid+1; naNghGQ
for(int cur=l;cur<=r;cur++){
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if(i1==mid+1) 2<6UwF
data[cur]=temp[i2++]; p7~!z.)o
else if(i2>r) +[ZY:ZQ
data[cur]=temp[i1++]; #9s,#
}
else if(temp[i1] data[cur]=temp[i1++]; (k P9hcV
else (m$Y<{)2
data[cur]=temp[i2++]; e+|sSp A
} p<%d2@lp
} _0I@xQj-
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} @VI@fN
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改进后的归并排序: SrJE_~i
QV8g#&z
package org.rut.util.algorithm.support; -g<oS9
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import org.rut.util.algorithm.SortUtil; &&%H%9
A}^mdw9
/** {{1G`;|v9
* @author treeroot =MWHJ'3-/
* @since 2006-2-2 3c%caK
* @version 1.0 g2]Qv@nxw
*/ _v:SP
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public class ImprovedMergeSort implements SortUtil.Sort { `@%LzeGz
` %}RNC
private static final int THRESHOLD = 10; ]###w;
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/* y>LBl]
* (non-Javadoc) 06jQE2z2R
* tX[WH\(xI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bd`P0f?
*/ F[MFx^sT{
public void sort(int[] data) { T4F/w|Q
int[] temp=new int[data.length]; SfR%s8c`
mergeSort(data,temp,0,data.length-1); _dU\JD
} Xc.`-J~Il
sRfcF`7
private void mergeSort(int[] data, int[] temp, int l, int r) { zeRyL3fnmb
int i, j, k; }a/Cro.~4
int mid = (l + r) / 2; @]0%L0u
if (l == r) (%9$! v{3
return; 0 {mex4
if ((mid - l) >= THRESHOLD) k=^xVQuI
mergeSort(data, temp, l, mid); ?cZlN!
else [Qr"cR^
insertSort(data, l, mid - l + 1); !m$jk2<
if ((r - mid) > THRESHOLD) ,,TnIouy
mergeSort(data, temp, mid + 1, r); $Q0n
else 31)&vf[[
insertSort(data, mid + 1, r - mid); ]'S^]
6B-16
for (i = l; i <= mid; i++) { t,'<gI
temp = data; h];I{crh
} cCX*D_kCB
for (j = 1; j <= r - mid; j++) { (sj,[
temp[r - j + 1] = data[j + mid]; [-&Zl(9&
} ]^]wP]R_
int a = temp[l]; kVL.PY\K
int b = temp[r]; `X8F`5&U\f
for (i = l, j = r, k = l; k <= r; k++) { p[cX O=
if (a < b) { WhDJ7{D
data[k] = temp[i++]; %)wjR/o
a = temp; D{!IW!w
} else { v0y(58Rz.
data[k] = temp[j--]; e(yh[7p=
b = temp[j]; ;d?R:Uw8
} _4f;<FL
} hOeRd#AQK
} 8i pez/
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/** snJ129}A
* @param data g78^9Y*1
* @param l uq{beC
* @param i uw7zWJ
n
*/ _G0x3
private void insertSort(int[] data, int start, int len) { s @C}P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); `{Ul!
} \Cj B1]I
} 8_F1AU? u
} )X!,3Ca{43
} A=4OWV?
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堆排序: 0aAoV0fMDz
o}!PQ#`M
package org.rut.util.algorithm.support; cu6Opq9
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import org.rut.util.algorithm.SortUtil; [gB+C84%%
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/** u4j5w
* @author treeroot XilS!,
* @since 2006-2-2 ix$bRdl
* @version 1.0 _j3f Ar(V
*/ M`>E|"<
public class HeapSort implements SortUtil.Sort{ 1"g<0
W
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/* (non-Javadoc) :-'qC8C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]{iQ21`a-
*/ #*}+J3/
public void sort(int[] data) { "}!G!k:
MaxHeap h=new MaxHeap(); #`IN`m|
h.init(data); MJvp6n
for(int i=0;i h.remove(); Vc2`b3"Br
System.arraycopy(h.queue,1,data,0,data.length); Jb(H %NJ
} nwWJ7M,A
3u;oQ5<(v
private static class MaxHeap{ =}*0-\QG
<qSC#[xu
void init(int[] data){ Dj +f]~
this.queue=new int[data.length+1]; 3 Y &d=
for(int i=0;i queue[++size]=data; 1qch]1
^G
fixUp(size); 0mnw{fE8_
} ]!
dTG
} / +\9S
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private int size=0; (?c-iKGc
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private int[] queue; G9lUxmS<
7"mc+QOp
public int get() { Zh,71Umz
return queue[1]; g ?k=^C
} IU[ [H#
#jk_5W
public void remove() { >bxS3FCX
SortUtil.swap(queue,1,size--); `g,..Ns-r
fixDown(1); NgwbQ7)
} WM{=CD
file://fixdown R@0R`Zs
private void fixDown(int k) { p[-O( 3Y
int j; G"6 !{4g
while ((j = k << 1) <= size) { rZF*q2?
if (j < size %26amp;%26amp; queue[j] j++; :t[_:3@
if (queue[k]>queue[j]) file://不用交换 KP"+e:a%
break; Rv=YFo[B
SortUtil.swap(queue,j,k); Vj-h;rB0z
k = j; Th%zn2R B
} >V937
} 0erNc'e
private void fixUp(int k) { IcEdG(
while (k > 1) { j [a(#V{
int j = k >> 1; ZoeD:xnh[
if (queue[j]>queue[k]) TV:9bn?r)
break; Mhu*[a=;x
SortUtil.swap(queue,j,k); XuTD\g3)
k = j; O8o3O
6[Y
} p 'k0#R$
} (mOtU8e
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} 5\v3;;A[
CAe!7HiR
} &L:!VL{I
GVz6-T~\>
SortUtil: Zc yc*{DS
*_e3 @g
package org.rut.util.algorithm; N;R^h? '
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import org.rut.util.algorithm.support.BubbleSort; 43w}qY1
import org.rut.util.algorithm.support.HeapSort; lMt=|66
import org.rut.util.algorithm.support.ImprovedMergeSort; O2+ 6st
import org.rut.util.algorithm.support.ImprovedQuickSort; edD)TpmE,
import org.rut.util.algorithm.support.InsertSort; No$3"4wk
import org.rut.util.algorithm.support.MergeSort; .d*8C,
import org.rut.util.algorithm.support.QuickSort; FsPw1A$y
import org.rut.util.algorithm.support.SelectionSort; :DNjhZ
import org.rut.util.algorithm.support.ShellSort; RNL9>7xV
D=$)n_F
/** #z(]xI)"
* @author treeroot ;|RTx
* @since 2006-2-2 Q/?$x*\>
* @version 1.0 [K Qi.u
*/ {_}I!`opr$
public class SortUtil { 8(De^H lO
public final static int INSERT = 1; df=f62
public final static int BUBBLE = 2; ~~.}ah/_d
public final static int SELECTION = 3; ta0|^KAA
public final static int SHELL = 4; xG 1nGO
public final static int QUICK = 5; [WJ+h~~
o
public final static int IMPROVED_QUICK = 6; Ni>[D"|
public final static int MERGE = 7; Smh,zCc>s
public final static int IMPROVED_MERGE = 8; vI?, 47Hj+
public final static int HEAP = 9; [7-?7mp!B
h;Qk@F
public static void sort(int[] data) { sT.ss$HY9,
sort(data, IMPROVED_QUICK); TvM~y\s
} 2eogY#
private static String[] name={ q)GdD==
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" maZ)cW?
};
y7{?Ip4[
IBGrt^$M
private static Sort[] impl=new Sort[]{ "MsIjSu
new InsertSort(), l] vm=7:
new BubbleSort(), _aphkeqd
new SelectionSort(), xk5]^yDp
new ShellSort(), _{>vTBU4F
new QuickSort(), wL1MENzp*z
new ImprovedQuickSort(), 4| f*eO
new MergeSort(), Y2TtY;
new ImprovedMergeSort(), ,6/V"kqIP
new HeapSort() u
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}; s.rm7r@#
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public static String toString(int algorithm){ km(Po}
return name[algorithm-1]; Wqnc{oq|$
} x;S @bY
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public static void sort(int[] data, int algorithm) { +q4O D$}
impl[algorithm-1].sort(data); [^)g%|W
} OI*H,Z"
wkq 66?
public static interface Sort { y-k.U%
public void sort(int[] data); [0of1eCSl
} v19-./H^
j
4*L_)z&4;
public static void swap(int[] data, int i, int j) { x2EUr,7
int temp = data; F
[M,]?
data = data[j]; +vH4MwG$.&
data[j] = temp; J,hCvm
} mw!F{pw
} PCvWS.{