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。 (|_N2R!
插入排序: \&.]!!Q
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package org.rut.util.algorithm.support; LS{t7P9K
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import org.rut.util.algorithm.SortUtil; .7v
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/** PA<<{\dp
* @author treeroot =#K$b *#
* @since 2006-2-2 `2.2; Vk
* @version 1.0 k-XE|v
*/ n2(@uT&>
public class InsertSort implements SortUtil.Sort{ KL4vr|i,
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/* (non-Javadoc) U6
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ i!DO
public void sort(int[] data) { \aB>Q"pS
int temp; +ht{ARX2(
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); `D9AtN] R
} ^*A8 NdaB
} ncCgc5uP
} OjRJyhzS*
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} OD`?BM
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冒泡排序: 76j5
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package org.rut.util.algorithm.support; DU=rsePWE
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import org.rut.util.algorithm.SortUtil; Qkq9oZ
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/** Mz#<Vm4
* @author treeroot +?[,{WtV
* @since 2006-2-2 fBRU4q=^T
* @version 1.0 B`i5lD
*/ q#!]5
public class BubbleSort implements SortUtil.Sort{ JOvRUDZ
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/* (non-Javadoc) w] =q>p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s+l3]Hd
*/ %9lx)w
public void sort(int[] data) { Vp~c$y+
int temp; OPP^n-iPr
for(int i=0;i for(int j=data.length-1;j>i;j--){ ">D7wX,.>
if(data[j] SortUtil.swap(data,j,j-1); WjVj@oC
} mf\eg`'4?
} GfMCHs
} TqN4OkCm/
} @Wb_Sz4`
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} X
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选择排序: S#wy+*
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package org.rut.util.algorithm.support; N+M^e`H
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import org.rut.util.algorithm.SortUtil; V.U9Q{y"
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/** wSwDhOX=
* @author treeroot YN >k5\M_v
* @since 2006-2-2 MrGq{,6C
* @version 1.0 >*FH JCe
*/ XwNJHOaF
public class SelectionSort implements SortUtil.Sort { 5B76D12
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/* DtrR< &m
* (non-Javadoc) ~vMdIZ.h
* g!*5@k|C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7Fd`MTo
*/ p,'Z{7HG
public void sort(int[] data) { aF
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int temp; !|@hU/
for (int i = 0; i < data.length; i++) { IVblSiFF
int lowIndex = i; -4IHs=`;I
for (int j = data.length - 1; j > i; j--) { /suW{8A(E
if (data[j] < data[lowIndex]) { eKw!%97>
lowIndex = j; #lld*I"d
} b)1v:X4Bv=
} F\G-. 1
SortUtil.swap(data,i,lowIndex); k6b0&il
} @V>BG8Y
} !/;/ X\d
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} :psP|7%|
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Shell排序: b2<((H
P56B~M_
package org.rut.util.algorithm.support; *@1(!A
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import org.rut.util.algorithm.SortUtil; k/;%{@G)
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/** PDi]zp9>H
* @author treeroot xB<^ar
* @since 2006-2-2 q<Sb>M/\,
* @version 1.0 NZW)$c'
*/ .%x%b6EI
public class ShellSort implements SortUtil.Sort{ :Ou[LF.O
b:6NVHb%
/* (non-Javadoc) f2f2&|7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (.Th?p%>7
*/ vi1
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public void sort(int[] data) { )oU%++cdo
for(int i=data.length/2;i>2;i/=2){ Wq}Y|0c
for(int j=0;j insertSort(data,j,i); 818,E
} RNMd,?dj
} SE7mn6,%\
insertSort(data,0,1); \a7caT{
} B}U:c]
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/** 2.>aL
* @param data M8{J
* @param j {IgLH`@
* @param i =lOdg3#\a
*/ FMNT0
private void insertSort(int[] data, int start, int inc) { e\7AtlW"
int temp; y:Ne}S*ncE
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); n)t'?7
} uK;&L?WB
} -2/&i
} ]H$Trf:L
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} $2J[lt?%
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快速排序: qe<xH#6
kIwq%c;
package org.rut.util.algorithm.support; &ra2(S45
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import org.rut.util.algorithm.SortUtil; :6[G;F7s
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/** !+V."*]l
* @author treeroot a9N$I@bi]
* @since 2006-2-2 =!N,{V_
* @version 1.0 "969F(S$
*/ Z(Z$>P&4
public class QuickSort implements SortUtil.Sort{ >.1d1#+b
mTU[khEmL=
/* (non-Javadoc) e,DRQ2AU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5I>a|I!j
*/ dIq*"Ry+~
public void sort(int[] data) { jb83Y>
quickSort(data,0,data.length-1); K3.z>.F'h
} k@
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private void quickSort(int[] data,int i,int j){ `P/87=h
int pivotIndex=(i+j)/2; ^9zlxs`<d
file://swap ZuNUha&a
SortUtil.swap(data,pivotIndex,j); 9
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int k=partition(data,i-1,j,data[j]); -2qI2Z
SortUtil.swap(data,k,j);
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if((k-i)>1) quickSort(data,i,k-1); 9
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if((j-k)>1) quickSort(data,k+1,j); &ev#C%Nu
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} fJK;[*&Y
/** G{u(pC^
* @param data a^eR~efdu@
* @param i ">v-CSHY
* @param j o\N^Uu
* @return Egi(z9|Pp
*/ 9ePR6WS4
private int partition(int[] data, int l, int r,int pivot) { r*kz`cJ
do{ ^~kfo|
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 9|l6.$Me/
SortUtil.swap(data,l,r); d04fj/B
} UWW'[gEP1
while(l SortUtil.swap(data,l,r); -#`tS
return l; 3U9leY'2N
} L~!Lq4]V\g
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} |21YED
} (YY!e2
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改进后的快速排序: %4x,^ K]
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package org.rut.util.algorithm.support; d;g]OeF
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import org.rut.util.algorithm.SortUtil; p>1Klh:8.'
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/** nn8uFISb
* @author treeroot gg&Dej2{
* @since 2006-2-2 M!Ywjvw*)3
* @version 1.0 }+fBJ$
*/ ,T8fo\a4
public class ImprovedQuickSort implements SortUtil.Sort { )(h<vo)-zX
H)pB{W/
private static int MAX_STACK_SIZE=4096; V>"NVRY
private static int THRESHOLD=10; d(q2gd@
/* (non-Javadoc) asJ t6C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }w5`Oig[
*/ yHs'E4V`$
public void sort(int[] data) { GiKmB-HO
int[] stack=new int[MAX_STACK_SIZE]; l:(?|1_
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int top=-1; DcsQ 6
int pivot; ',s{N9
int pivotIndex,l,r; 6)1xjE#
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stack[++top]=0; uz@lz +
stack[++top]=data.length-1; 4`p[t;q
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while(top>0){ I@uin|X
int j=stack[top--]; ,A9{x\1!
int i=stack[top--]; l<p6zD$l
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pivotIndex=(i+j)/2; r?R!/`f
pivot=data[pivotIndex]; n:[LsbTk
7!q.MOYm
SortUtil.swap(data,pivotIndex,j); ka<rlh<h
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file://partition t Z]b0T(e
l=i-1; ,%]xT>kH
r=j; H1 e^/JD)
do{ Za'}26
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); XB+Juk&d
SortUtil.swap(data,l,r); q&@q/9kz
} .xg, j{%(
while(l SortUtil.swap(data,l,r); {3G2-$yb
SortUtil.swap(data,l,j); 9m}c2:p
=~ ="#
if((l-i)>THRESHOLD){ aZL
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stack[++top]=i; .!Os'Y9[,
stack[++top]=l-1; G;;iGN
} w6.J&O
if((j-l)>THRESHOLD){ 29k\}m7l<*
stack[++top]=l+1; JDm7iJxc_
stack[++top]=j; UP@-@syGw
} g({dD;
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} K ZQ
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file://new InsertSort().sort(data); ^vr`t9EE
insertSort(data); }zqYn`ffD
} uDG#L6
/** u|8yV.=R
* @param data (Q6}N'T
*/ LE@`TPg$R
private void insertSort(int[] data) { QiQO>r
int temp; usOIbrQ
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); $jNp-5+Q;
} ['_G1_p
} Q~G>=J9
} ]z5gC`E0
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} roE*8:Y
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归并排序: &ajpD sz;
e X q}0-*f
package org.rut.util.algorithm.support; #ZPy&GIr
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import org.rut.util.algorithm.SortUtil; $_NP4V8|z/
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/** ]BBL=$*
* @author treeroot gTwxmp.,
* @since 2006-2-2 aC=D_JJ\
* @version 1.0 Irnfr\l.
*/ BjIKs~CT
public class MergeSort implements SortUtil.Sort{ >6"u{Qmr
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/* (non-Javadoc) =)9@rV&~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "8h7"WR
*/ 0N19R 5NN8
public void sort(int[] data) { yZ]u{LJS
int[] temp=new int[data.length]; TEi~X2u
mergeSort(data,temp,0,data.length-1); c;pv< lX'
} V_Oj?MMpn
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private void mergeSort(int[] data,int[] temp,int l,int r){ l gzA) (
int mid=(l+r)/2; @>sZ'M2mq
if(l==r) return ; b 6B5
mergeSort(data,temp,l,mid); (5(TbyWwD
mergeSort(data,temp,mid+1,r); P\R#!+FgW8
for(int i=l;i<=r;i++){ N9A#@c0O
temp=data; a@&P\"k
} ;VAHgIpx;
int i1=l; K6l{wyMb|
int i2=mid+1; vMB`TpZ
for(int cur=l;cur<=r;cur++){ p 3*y8g-
if(i1==mid+1) @?r[
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data[cur]=temp[i2++]; rr=e
else if(i2>r) ij<6gv~ n"
data[cur]=temp[i1++]; Gn8'h
TM
else if(temp[i1] data[cur]=temp[i1++]; yMoV|U6
else A\v(!yg
data[cur]=temp[i2++]; qu:nV"~_
} V"`t*m$
} byTTLs,}d
!ENDQ?1
} J*} warf&
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改进后的归并排序: d^sm;f
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]7 =]
package org.rut.util.algorithm.support; )Z0bMO<
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import org.rut.util.algorithm.SortUtil; hvO
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/** 5v`[c+@F
* @author treeroot 9 cwy;au
* @since 2006-2-2 :K)7_]y
* @version 1.0 k:qS'
*/ Fb0r(vQ^
public class ImprovedMergeSort implements SortUtil.Sort { 4fyds< f
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private static final int THRESHOLD = 10; ;n~-z5)
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/* Lq6R_udp
* (non-Javadoc) !Enq2
* 8h%oJ4da
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~stJO]) a
*/ S4hv7.A
public void sort(int[] data) { !5}u \
int[] temp=new int[data.length]; P\lEfsuR
mergeSort(data,temp,0,data.length-1); N a$eeM
} !JGe
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R0A|}Ee*
private void mergeSort(int[] data, int[] temp, int l, int r) { TF1,7Qd
int i, j, k; ^tTASK
int mid = (l + r) / 2; N r,Qu8
if (l == r) A 6IrA/b
return; bQlv b
if ((mid - l) >= THRESHOLD) `i:DmIoz
mergeSort(data, temp, l, mid); [^S(SPL
else @$aGVEcU$
insertSort(data, l, mid - l + 1); tg%#W`
if ((r - mid) > THRESHOLD) 6D&{+;
mergeSort(data, temp, mid + 1, r); wr-/R"fX
else uSgR|b;R]
insertSort(data, mid + 1, r - mid); 2t[P-on
srCpgs]h
for (i = l; i <= mid; i++) { Mm)yabP
temp = data; !y\r.fm!A
} L}a-c(G+8
for (j = 1; j <= r - mid; j++) { kfV}ta'^S
temp[r - j + 1] = data[j + mid]; .<Rw16O
} B{ A b#
int a = temp[l]; :*} -,{uX
int b = temp[r]; 'EHtA9M
for (i = l, j = r, k = l; k <= r; k++) { YWFq&II|Z
if (a < b) { uo8[,'
data[k] = temp[i++]; VtN1 [}
a = temp; \'Q rJ ?D
} else { CBr(a'3{Z
data[k] = temp[j--]; !sG#3sUe[
b = temp[j]; (hJ&`Tt
} 4OaU1Y[
} J6I:UML
} [} zzG@g,J
kz\Ss|jl
/** \47djmG-
* @param data r@a]fTf
* @param l YO'aX
* @param i bEKh U\@=J
*/ %b[>eIJU#
private void insertSort(int[] data, int start, int len) { 21$E.x 6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); nSv@FT'~z
} D"V(A \sZ
} s(Bcw`'#
} )Yu
} er8T:.Py
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堆排序: ?Kt F!:_C
=(]Z%Q-V
package org.rut.util.algorithm.support; &,l(2z[
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l
import org.rut.util.algorithm.SortUtil; "g,`K s ];
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/** mCyn:+
* @author treeroot D3B]
* @since 2006-2-2 45?%D}
* @version 1.0 ;_=N
YG.
*/ PU,%Y_xR
public class HeapSort implements SortUtil.Sort{ 1Q/=s,{u
Kh$Q9$
/* (non-Javadoc) r~z'QG6v/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iInWw"VbKe
*/ W cGg
public void sort(int[] data) { Bd]k]v+
MaxHeap h=new MaxHeap(); ]|-sZ<?<i
h.init(data); xg}Q~,:
for(int i=0;i h.remove(); bksv2@ar
System.arraycopy(h.queue,1,data,0,data.length); ?I[*{}@n"
} ", p5}}/
%tMx48'N
private static class MaxHeap{ lSg[7lt
!:PiQ19
'u
void init(int[] data){ lA pZC6Iwk
this.queue=new int[data.length+1]; P8(hHuO
for(int i=0;i queue[++size]=data; wRvh/{xB
fixUp(size); =EYWiK77a
} z2>LjM)
#
} [l3ys
s+?2oPa
private int size=0; gBky ZK
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private int[] queue; &7i&"TNptP
1ysQvz
public int get() { ?-zuy US
return queue[1]; &+n9T?+b
} P)kJ[Zv>f
!
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public void remove() { \BuyJskE
SortUtil.swap(queue,1,size--); ^)wKS]BQ..
fixDown(1); zak|* _
} a'-u(Bw
file://fixdown d:kn%L6k_
private void fixDown(int k) { QtwQVOK
int j; pI:,Lt1B
while ((j = k << 1) <= size) { .faf!3d
if (j < size %26amp;%26amp; queue[j] j++; Y
hQ)M5
if (queue[k]>queue[j]) file://不用交换 ?=ffv]v|
break; J#48c'
SortUtil.swap(queue,j,k); >.6|\{*sG
k = j; f~F{@),acZ
} _1NK9dp:
} 'zM=[#!B
private void fixUp(int k) { PcBD;[cn
while (k > 1) { 7o0zny3?
int j = k >> 1; !b"?l"C+u
if (queue[j]>queue[k]) sO`
oapy
break; )S
7+y6f&*
SortUtil.swap(queue,j,k); r\d(*q3B
k = j; 43pe6 ^.
} |mP};&b
} ^$50[
V^,eW!
} gfs ;?vP
zGFD71=#
} a%e`
hbOXR.0z
SortUtil: J*[@M*R;&
4Wp5[(bg
package org.rut.util.algorithm; #R{>@]x`
3*&
Y'/!
import org.rut.util.algorithm.support.BubbleSort; 0:`|T jf_
import org.rut.util.algorithm.support.HeapSort; KW(a@X
import org.rut.util.algorithm.support.ImprovedMergeSort; 0|RofL&o
import org.rut.util.algorithm.support.ImprovedQuickSort; ?+))J~@t
import org.rut.util.algorithm.support.InsertSort; D3yTN"
import org.rut.util.algorithm.support.MergeSort; g_1#if&
import org.rut.util.algorithm.support.QuickSort; fO$){(]^
import org.rut.util.algorithm.support.SelectionSort; dYwkP^KB
import org.rut.util.algorithm.support.ShellSort; m/1FVC@*
b?l>vUgAg
/** GPGE7X'
* @author treeroot 4SZ,X^]I>
* @since 2006-2-2 1vxRhS&FY
* @version 1.0 P+0'^:J
*/ Lxwi"ndP
public class SortUtil { +U2lwd!j
public final static int INSERT = 1; "~5cz0
H3v
public final static int BUBBLE = 2; E`UkL*Q
public final static int SELECTION = 3; ;U|(rM;
public final static int SHELL = 4; Xva(R<W7d<
public final static int QUICK = 5; a(|6)w-
public final static int IMPROVED_QUICK = 6; _"ciHYHBQ
public final static int MERGE = 7; HbegdbTJ
public final static int IMPROVED_MERGE = 8; Z^:_,aJ?
public final static int HEAP = 9; )A$"COM4
D xV=S0P
public static void sort(int[] data) { =3.dgtH
sort(data, IMPROVED_QUICK); b)<WC$"
} .`}TND~
private static String[] name={ 3uocAmY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" z.Ic?Wz7
}; bGCC?}\
3'Y-~^ml|
private static Sort[] impl=new Sort[]{ ^Hv&{r77
new InsertSort(), px<psR5
new BubbleSort(), pL"{Uqi
new SelectionSort(), x
;|HT
new ShellSort(), :QGkYJ
new QuickSort(), $<v4c5r]O
new ImprovedQuickSort(), dS ojq6M
new MergeSort(), 2%sZaM
new ImprovedMergeSort(), (dq_,LI
new HeapSort() =/Gd<qz3
}; nzC *mPX8
uQIPnd(V
public static String toString(int algorithm){ Jy)=TJ!y
return name[algorithm-1]; w'K7$F51
} CefFUqo4
TQ]gvi|m
public static void sort(int[] data, int algorithm) { +@Qr GY
impl[algorithm-1].sort(data); gx.\H3y
} In1W/?
;OlnIxH(W
public static interface Sort { 1'qXT{f/~
public void sort(int[] data); ~.:{
Ik]
} :C*}Yg
]E-/}Ysz
public static void swap(int[] data, int i, int j) { V: D;?$Jl
int temp = data; a9-Mc5^'n
data = data[j]; p^pd7)sBr
data[j] = temp; M0w Uis:`
} = LNU%0m
} qWhW4$7x