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。 *pJGp:{6V?
插入排序: A%.mIc.
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package org.rut.util.algorithm.support; >J:=)1`
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import org.rut.util.algorithm.SortUtil; 1^WGJ"1
/** R}=5:)%w
* @author treeroot C!5A,| DX
* @since 2006-2-2 8~o']B;lJ
* @version 1.0 7a'yO+7-)
*/ C.92FiC
public class InsertSort implements SortUtil.Sort{ !lgL=Ys(
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/* (non-Javadoc) TBBnsj6e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SU ~a()"
*/ SO0\d0?u
public void sort(int[] data) { $~G,T
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int temp; (E0
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); .r<aPy$
} :jl*Y-mM
} C:J;'[,S
} fkzSX8a9}
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} /e '3\,2_
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冒泡排序: =*,SD
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package org.rut.util.algorithm.support; 'K,\
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import org.rut.util.algorithm.SortUtil; Q*smH-Sw
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/** j~qm$ 'H
* @author treeroot nHm}^.B*+
* @since 2006-2-2 `$6o*g>:
* @version 1.0 &n k)F<
*/ Lj1l]OD
public class BubbleSort implements SortUtil.Sort{ ;?2)[a
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/* (non-Javadoc) 4qOzjEQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !wy _3a
*/ i<Vc~!pT
public void sort(int[] data) { m@2E ~m
int temp; \cIN]=#
for(int i=0;i for(int j=data.length-1;j>i;j--){ gpV4qDXV
if(data[j] SortUtil.swap(data,j,j-1); EjR(AqZY
} Uk?G1]$mL
} uYUFxm
} XQ]K,# i
} Yr9'2.%Q
y*i&p4Y*
} 2zBk#c+
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选择排序: 2Xt4Rqk $
u;`]U$Qq9
package org.rut.util.algorithm.support; OpUfK4U)
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import org.rut.util.algorithm.SortUtil; 7AqgX0)
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/** 7*5B
* @author treeroot *4cuWkQ,
* @since 2006-2-2 ^{+ry<rS>
* @version 1.0 ;'"'|} xn
*/ vhrf 89-q
public class SelectionSort implements SortUtil.Sort { <>] DcA
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/* HbKE;N
* (non-Javadoc) +MoUh'/u
* hhTtxC<:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E=s h^Q(A
*/ TjW!-s?S
public void sort(int[] data) { `fBQ?[05.
int temp; 5PeS/%uT@
for (int i = 0; i < data.length; i++) { ;,4*uU'vq
int lowIndex = i; }%< ?]
for (int j = data.length - 1; j > i; j--) { Dp'urf\*$
if (data[j] < data[lowIndex]) { uC'-: t#
lowIndex = j; Ln&pe(c
} ;sB=f
} Th)
SortUtil.swap(data,i,lowIndex); 5
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} DSrU7#
} Q
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} UUt"8]@[
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Shell排序: e=sc$1|4=
mxv?PP
package org.rut.util.algorithm.support; }je<^]a
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import org.rut.util.algorithm.SortUtil; ]*2),H1
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/** ? x%s
j
* @author treeroot b;i*}4h!
* @since 2006-2-2 jBLTEb
* @version 1.0 22l'kvo4"
*/ !dqC6a
public class ShellSort implements SortUtil.Sort{ xWLvx'8W
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/* (non-Javadoc) PucNu8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QK-aH1r
*/ W5|{A])N
public void sort(int[] data) { %BI8m|6
for(int i=data.length/2;i>2;i/=2){ P3oYk_oW
for(int j=0;j insertSort(data,j,i); &[ })FI
} D;,p?]mgO~
} `Skvqo(5:
insertSort(data,0,1); )PYPlSQ*V
} y,D9O/VP
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/** (m/:B=K
* @param data JX59n%$@
* @param j K9<8FSn
* @param i a5a
;Fp
*/ r:QLU]
private void insertSort(int[] data, int start, int inc) { ;z:Rj}l
int temp; v{" nyW6#
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); SoIK<*J
} $fb%?n{
} jFSR+mP!
} ]cRvdUGv
zEQ]5>mG
} ?^&ih:"
A c_P^
快速排序: -laH^<jm5
HhbBt'fH
package org.rut.util.algorithm.support; $(1t~u<17
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import org.rut.util.algorithm.SortUtil; mR0`wrt
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/** @-q,%)?0}=
* @author treeroot )]>t(
* @since 2006-2-2 ,N$Q']Td
* @version 1.0 NEBhVh
*/ Qf:e;1F!
public class QuickSort implements SortUtil.Sort{ c &c
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/* (non-Javadoc) re/-Yu$'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }9OMXLbRv
*/ Xu{y5N
public void sort(int[] data) { X9*n[ev
quickSort(data,0,data.length-1); OTy!Q,0$.
} zw<<st Bp
private void quickSort(int[] data,int i,int j){ uP9b^LEoN
int pivotIndex=(i+j)/2; 2CC"Z
file://swap c)EYXo
SortUtil.swap(data,pivotIndex,j); E~y8X9HZ)
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int k=partition(data,i-1,j,data[j]); {4+/0\
SortUtil.swap(data,k,j); '(K4@[3t
if((k-i)>1) quickSort(data,i,k-1); dsIbr"m
if((j-k)>1) quickSort(data,k+1,j); 5<Kt"5Z%7
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} 3W'fEh5
/** ;MfqI/B{
* @param data |$
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* @param i < F5VJ
* @param j _a&gbSQv
* @return &v:zS$m>
*/ rfDGS%!O%
private int partition(int[] data, int l, int r,int pivot) { e N`+ r
do{ CI*JedO]
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 0Gu77&
SortUtil.swap(data,l,r); A
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} EW$drY@
while(l SortUtil.swap(data,l,r); Uz ;^R@
return l; Q<>u)%92@
} TG=A]--_a
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} N[@~q~v
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改进后的快速排序: bUgg2iFS
w5Fk#zJv
package org.rut.util.algorithm.support; C6ql,hR^h`
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import org.rut.util.algorithm.SortUtil; \J:+Wl.9A
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/** 8wWp+Hk
* @author treeroot #19O5
* @since 2006-2-2 #X]*kxQ<
* @version 1.0 xxGm T.&
*/ x& _Y( bHA
public class ImprovedQuickSort implements SortUtil.Sort { wPU5L*/*i
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private static int MAX_STACK_SIZE=4096; $mxG-'x%K
private static int THRESHOLD=10; :{<|,3oNdR
/* (non-Javadoc) bfeTf66c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wPI!i K@Ro
*/ **P P
public void sort(int[] data) { zd$'8/Cq
int[] stack=new int[MAX_STACK_SIZE]; {GtX:v#
j*>]HNo&
int top=-1; "OwM'
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int pivot; :U\*4l
int pivotIndex,l,r; |kmP#`P~
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stack[++top]=0; Gd!_9S`68
stack[++top]=data.length-1; km>ZhsqD
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while(top>0){ )EMlGM'2q
int j=stack[top--]; 5CnNp?.t^
int i=stack[top--]; `U0XvWPr[
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pivotIndex=(i+j)/2; 9ad`q+kY
pivot=data[pivotIndex]; xkf2;
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SortUtil.swap(data,pivotIndex,j); p#c41_?'e
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file://partition <=CABWO.
l=i-1; -sHX
r=j; _"*vj-{-y
do{ |i
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while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 8Z}%,G*n
SortUtil.swap(data,l,r); 3]S_w[Q4
} / 8O=3
while(l SortUtil.swap(data,l,r); )h ,v(Rxa
SortUtil.swap(data,l,j); /y1+aTiJ
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if((l-i)>THRESHOLD){ ="G2I\
stack[++top]=i; 7j|CWurvq
stack[++top]=l-1; i&(1<S>P
} L0VZ>!*o
if((j-l)>THRESHOLD){ H8g6ZCU~
stack[++top]=l+1; .Z]hS7t
stack[++top]=j; ;u`8pF!_eE
} !,$K;L
=
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} iB99.,o-&
file://new InsertSort().sort(data); zw'%n+5m
insertSort(data); V+D <626o
} Y'1
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/** L5UZ@R,
* @param data !Th5x2
*/ bOU"s>?
private void insertSort(int[] data) { _zbIS&4
int temp; ,J 2qLH1
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Q~.t8g/
} ~(*tcs]hY
} x+~!M:fAc9
} 8@ f!,!Wn
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} T!?tyW
XR VZU~ZV
归并排序: {Zw;<1{E
z3[J
sE%
package org.rut.util.algorithm.support; 1tO96t^d%
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import org.rut.util.algorithm.SortUtil; 6wT ])84
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/** jD<xpD
* @author treeroot .dYv.[?hL
* @since 2006-2-2 5{W Aw !
* @version 1.0 erv94acq
*/ nN.Gn+Cl
public class MergeSort implements SortUtil.Sort{ Yt =)=n
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/* (non-Javadoc) g/l:q&Q<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XXm7rn
*/ x?A<X2
public void sort(int[] data) { *Dq ++
int[] temp=new int[data.length]; | )
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mergeSort(data,temp,0,data.length-1); )Vy0V=
} dHAT($QG
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private void mergeSort(int[] data,int[] temp,int l,int r){ Qm7];,
int mid=(l+r)/2; Uufig)6
if(l==r) return ; ?zP
2
mergeSort(data,temp,l,mid); t+d7{&B
mergeSort(data,temp,mid+1,r); |d~'X%b%
for(int i=l;i<=r;i++){ vaQsG6q[
temp=data; rF}Q(<Y86
} U<F|A!Fg
int i1=l; 6.tA$#6HP
int i2=mid+1; gT=pO`a
for(int cur=l;cur<=r;cur++){ zqt%x?l
if(i1==mid+1) 3H<%\SYp
data[cur]=temp[i2++]; bLWY Tj
else if(i2>r) I%:?f{\
data[cur]=temp[i1++]; 4dN <B U
else if(temp[i1] data[cur]=temp[i1++]; T)<^S(57
else 96;5
data[cur]=temp[i2++]; sk07|9nU
} A[@koLCL
} 6d5J*y2
RX{}
UmU<
} kWa5=BW2f
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改进后的归并排序: trjpq{,[U
I.Catm2
package org.rut.util.algorithm.support; z3 ^_C`(F
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import org.rut.util.algorithm.SortUtil; 5~UW=
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/** .>r3ZwrE'
* @author treeroot V=&M\58
* @since 2006-2-2 _U LzA
* @version 1.0 8kcMgCO
*/ %MGt3)
public class ImprovedMergeSort implements SortUtil.Sort { 2[=3-1c
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private static final int THRESHOLD = 10; Yh^8
!
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/* kf<c[ su
* (non-Javadoc) CvZ\Z472.j
* N3lz-vP-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o(DG 3qk
*/ DC/Czkv9
public void sort(int[] data) { {U>N*&_`
int[] temp=new int[data.length]; qe(gKKA%q
mergeSort(data,temp,0,data.length-1); 7@g0>1Fz
} RhB)AUAj
QL7.QG
private void mergeSort(int[] data, int[] temp, int l, int r) { qs\Cwn!
int i, j, k; y]PuY\+
int mid = (l + r) / 2; ?+yM3As9_V
if (l == r) N<b2xT
return; IUEpE9_
if ((mid - l) >= THRESHOLD)
mT -[I<
mergeSort(data, temp, l, mid); $aU.M3
else JvvN>bg
insertSort(data, l, mid - l + 1); j[R.UB3J
if ((r - mid) > THRESHOLD) L#'XN H"
mergeSort(data, temp, mid + 1, r); Gt?l 2s
else 32HF&P+0%
insertSort(data, mid + 1, r - mid); .`_iWfK
i5Sya]FN
for (i = l; i <= mid; i++) { :
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temp = data; |cnps$fk~
} 9.xRDk
for (j = 1; j <= r - mid; j++) { #C.
temp[r - j + 1] = data[j + mid]; #Ff8_xhP 2
} _x""-X~OL
int a = temp[l]; sG_/E-%5'
int b = temp[r]; EN[T3 Y
for (i = l, j = r, k = l; k <= r; k++) { } LC
if (a < b) { (K8Ob3zN_
data[k] = temp[i++]; ![Gn0X?]
a = temp; 4'`P+p"A
} else { i\^4EQ
data[k] = temp[j--]; 1|w@f&W"
b = temp[j]; k]$oir
} P%Vq#5
} ))Z>$\<:
} vR!g1gI23
Wq+GlB*
/** yZ[g2*1L
* @param data N>*+Wg$Ne
* @param l U/kQw rM
* @param i zdU46|!u
*/ 6@8t>"}
private void insertSort(int[] data, int start, int len) { O<V 4j,
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %1jcY0zEQ
} pZ\7!rON
} -@_v@]:
} Q 318a0
} eBxm
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堆排序: (&Lt&i _
1,;zX^
package org.rut.util.algorithm.support; _iq62[i3^
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import org.rut.util.algorithm.SortUtil; :8oJG8WH
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/** ojlyW})$%
* @author treeroot 4P1}XYD-2
* @since 2006-2-2 A&Aj!#
* @version 1.0 0mUVa=)D
*/ g;p}
-=
public class HeapSort implements SortUtil.Sort{ 6MY<6t0a
hchG\i
/* (non-Javadoc) @>VVB{1@,]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jy2gR1~
*/ pk.\IKlG]
public void sort(int[] data) { ^5Lk}<utw
MaxHeap h=new MaxHeap(); 51y"#\7
h.init(data); <nqv)g"u0
for(int i=0;i h.remove(); mrnPZf i
System.arraycopy(h.queue,1,data,0,data.length); 1F5KDWtE
} :zKMw=
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private static class MaxHeap{ R^/SBrWve
0stc$~~v
void init(int[] data){ HBOyiIm Q
this.queue=new int[data.length+1]; D%yY&q;
for(int i=0;i queue[++size]=data; bz#]>RD
fixUp(size); =iKl<CqI$E
} Pb8@owG8
} "#o..?K
`wt so
private int size=0; 77)WNL/
x
RM `qC
private int[] queue; $+7uB-KsU
'-RacNY
public int get() { q{Z#}|km#
return queue[1]; m?<E >-bI
} ~o%igJ
}.C
xH*X5?
public void remove() { HVHv,:bPo
SortUtil.swap(queue,1,size--); qJdlZW<
fixDown(1); \_8wU'7
} xxu
file://fixdown jO&*E'pk
private void fixDown(int k) { 9ET1Er{4
int j; 0(eaVi-%D
while ((j = k << 1) <= size) { vsj4?0=
if (j < size %26amp;%26amp; queue[j] j++; ^r&)@R$V
if (queue[k]>queue[j]) file://不用交换 mvZ#FF1,J
break; s<FBr,
SortUtil.swap(queue,j,k); l^Rb%?4Z
k = j; LQ# E+id&
} C{zp8 A(Dh
} \|S!g_30m
private void fixUp(int k) { _/I">/ivlM
while (k > 1) { P$z_A8}
int j = k >> 1; {k)gDJU
if (queue[j]>queue[k]) \\FT.e6
break; .N
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SortUtil.swap(queue,j,k); DHWz, M
k = j; , [|aWT%9
} z6ObX
} Ck
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a9.yuSzL
} _rwJ:r
aaFT
} ;Nj9,Va(t
aE`d[dSG
SortUtil: +GI906K
6UeY Z g
package org.rut.util.algorithm; R{H[< s+n
e(?w h
import org.rut.util.algorithm.support.BubbleSort; K@O^\
import org.rut.util.algorithm.support.HeapSort; 7pyzPc#_
import org.rut.util.algorithm.support.ImprovedMergeSort; !=YKfzE
import org.rut.util.algorithm.support.ImprovedQuickSort; fu^W# "{
import org.rut.util.algorithm.support.InsertSort; BHUI1y5t
import org.rut.util.algorithm.support.MergeSort; A#=TR_@:
import org.rut.util.algorithm.support.QuickSort; <:}nd:l1
import org.rut.util.algorithm.support.SelectionSort; H3D<"4Q>
import org.rut.util.algorithm.support.ShellSort; XnQR(r)pR2
Ku75YFO,5
/** qcj {rG18
* @author treeroot -d\sKc
* @since 2006-2-2 CBEf;Ig
* @version 1.0 pUXoSnIq:
*/ \#_ymM0
public class SortUtil { gYB!KM *v
public final static int INSERT = 1; W[\6h Zv
public final static int BUBBLE = 2; G@k]rwub
public final static int SELECTION = 3; Dw%'u'HG
public final static int SHELL = 4; sE pI)9
public final static int QUICK = 5; !ajBZ>Q
public final static int IMPROVED_QUICK = 6; } a9Ah:.7/
public final static int MERGE = 7; &<PIm
public final static int IMPROVED_MERGE = 8; P]43FPb
public final static int HEAP = 9; V\;Xa0
_B0(1(M<2
public static void sort(int[] data) { \wK&wRn)
sort(data, IMPROVED_QUICK); f"ndLX:'}
} q!ZM Wg
private static String[] name={ |58HPW9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !ZYPz}&N_
}; `x[Is$
6O7s^d&K
private static Sort[] impl=new Sort[]{ Wo1xZZ
new InsertSort(), 4dX{an]Cz
new BubbleSort(), X7},|cmD_
new SelectionSort(), mM,HMrgLqK
new ShellSort(), q>$MqKWM
new QuickSort(), 51jgx,-|$
new ImprovedQuickSort(), KewW8H~tb
new MergeSort(), X4
Arn,
new ImprovedMergeSort(), AE0uBv
new HeapSort() ~L)~p%rbi
}; ~3F'X
uuC ["Z
public static String toString(int algorithm){ Jka>Er
return name[algorithm-1]; {zwH3)|Hn
} ngo> ^9/8
n)e2?
public static void sort(int[] data, int algorithm) { LhJUoX
impl[algorithm-1].sort(data); srGOIK.
} 0MW W(
;
!T{+s
T
public static interface Sort { QyD0WC}i
public void sort(int[] data); 'hpOpIsHa
} +%JBr+1#\
5=pE*ETJ
public static void swap(int[] data, int i, int j) { Q^(CqQo!<
int temp = data; P.Z:`P)
data = data[j]; $w0TEO!
data[j] = temp; $DY#04Je\=
} Jo5B mh0
} YM}a>o