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。 ih;]nJ]+-
插入排序: 9\DQ>V TQ
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package org.rut.util.algorithm.support; `kJ^zw+
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import org.rut.util.algorithm.SortUtil; aUtnR<6
/** uF3qD|I\
* @author treeroot t0T"@t#c
* @since 2006-2-2 @$+ecaVW
* @version 1.0 qhz]Wm P
*/ Z LD}a:s
public class InsertSort implements SortUtil.Sort{ >:|q&|x-
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/* (non-Javadoc) ez6EjUk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) EB8\_]6XJ
*/ 1[vi.
public void sort(int[] data) { oTuOw|[
int temp; [`):s= FC
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); #gcF"L||
} =Yt
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} '&|=0TDd+
} _Iv6pNd/
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} 8UVmv=T
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冒泡排序: sK5r$Dbr
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package org.rut.util.algorithm.support; b^$|Nz;
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import org.rut.util.algorithm.SortUtil; 2FW\O0U
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/** `6xkf&Kt
* @author treeroot lh;:M-b9
* @since 2006-2-2 >M/V oV
* @version 1.0 ixT:)|'i
*/ )}?#
public class BubbleSort implements SortUtil.Sort{ B,=H@[Fj
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/* (non-Javadoc) &mtJRfnu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Yn G_m]
*/ 2mGaD\?K
public void sort(int[] data) { %eO0wa$a
int temp; ]3l 9:|
for(int i=0;i for(int j=data.length-1;j>i;j--){ k>g_Z`%<
if(data[j] SortUtil.swap(data,j,j-1); j_.5r&w
} t8+X%-r
} ]@Uq=?%
} |VNnOM
} t?'!$6
~S7D>D3S
} aiu5}%U
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选择排序: l|k`YC x
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package org.rut.util.algorithm.support; F
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import org.rut.util.algorithm.SortUtil; Gvr@|{k
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/** P IwFF}<(
* @author treeroot Y*vW!yu
* @since 2006-2-2 ,~]tg77
* @version 1.0 %s(k_|G+4
*/ 57&b:0`p
public class SelectionSort implements SortUtil.Sort { S-|)QGxV6
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/* vz7J-CH
* (non-Javadoc) j4R(B
* 5X:*/FuS@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xM&Wgei]10
*/ 8;+B*+%@n
public void sort(int[] data) { 'GS"8w~j
int temp; @dPTk"P
for (int i = 0; i < data.length; i++) { y3o25}"
int lowIndex = i; io{@^1ab
for (int j = data.length - 1; j > i; j--) { 8Y7Q+p|O
if (data[j] < data[lowIndex]) { >^*+iEe
lowIndex = j; 0p}D(m2B
} 2
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} YLzx<~E4a
SortUtil.swap(data,i,lowIndex); 2-Ej4I~
} W1|0Yd ;P
} zIu
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} < F.hZGss7
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Shell排序: !~rY1T~
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package org.rut.util.algorithm.support; P<a)25be/
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import org.rut.util.algorithm.SortUtil; O%5
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/** HTS%^<u
* @author treeroot E4~<V=2l
* @since 2006-2-2 l^pA2yh|
* @version 1.0 li}1S
*/ z;|A(*Y
public class ShellSort implements SortUtil.Sort{ `</ff+Q6
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/* (non-Javadoc) |w<H!lGe!$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2;DuHO1
*/ D)m5
public void sort(int[] data) { =06gj)8
for(int i=data.length/2;i>2;i/=2){ UVd 7 JGR
for(int j=0;j insertSort(data,j,i); U<_3^
} =pS5uR~
} 5',8 ziJQ
insertSort(data,0,1); )W;o<:x3
} 4;0lvDD
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/** ]);%wy{Ho
* @param data uP~@U" !
* @param j Vt".%d/`7
* @param i yl7&5)b#9
*/ "2)H'<
private void insertSort(int[] data, int start, int inc) { ]dGw2y
int temp; lTV'J?8!-a
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); CkoLTY
} sP;nGQ.eN
} NnDxq%l%
} ?&63#B,iZ
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} CzRc%%BA
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快速排序: Of[XKFn_
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package org.rut.util.algorithm.support; _lGdUt 2
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import org.rut.util.algorithm.SortUtil; iB%gPoDCL@
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/** o7sT=x9
* @author treeroot ->y J5smtY
* @since 2006-2-2 }NzpiY9
* @version 1.0 N D(/uyI
*/ di6QVRj1
public class QuickSort implements SortUtil.Sort{ XBb~\p3y
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/* (non-Javadoc) C9n?@D;S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }%'?p<^M
*/ M42Ssn)
public void sort(int[] data) { U |Jo{(Y
quickSort(data,0,data.length-1); @Z\,q's
} ][9%Kl*%@p
private void quickSort(int[] data,int i,int j){ JGsx_V1t
int pivotIndex=(i+j)/2; 1DE<rKI
file://swap 2.l Z:VLN
SortUtil.swap(data,pivotIndex,j); qB0E_y)a
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int k=partition(data,i-1,j,data[j]); !'&n-Q
SortUtil.swap(data,k,j); jv%kOovj
if((k-i)>1) quickSort(data,i,k-1);
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if((j-k)>1) quickSort(data,k+1,j); {=!b/l;@
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} t>urc
/** :U3kW8;UMP
* @param data qln3 k`
* @param i |"/8XA
* @param j %_RQx2
* @return x7:s]<kE
*/ C)@y5. G;
private int partition(int[] data, int l, int r,int pivot) { a!<8\vzg
do{ si`A:14R
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ,9}h
SortUtil.swap(data,l,r); ES.fOdx
} aI6$? wus
while(l SortUtil.swap(data,l,r); h]5C|M|
return l; GqaDL3Niqs
} 7=TF.TW)
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} H%UL%l$
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改进后的快速排序: TMlP*d#
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package org.rut.util.algorithm.support; {mZC$U'
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import org.rut.util.algorithm.SortUtil; gQxbi1!;9
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/** #fM#p+v
* @author treeroot xLNtIzx
* @since 2006-2-2 E:JJ3X|
* @version 1.0 aqRhh=iS
*/ yp KUkH/
public class ImprovedQuickSort implements SortUtil.Sort { hb zC#@q
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private static int MAX_STACK_SIZE=4096; \ 3wfwu.q
private static int THRESHOLD=10; j9?}j#@
/* (non-Javadoc) EQb7-vhg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5!DBmAB
*/ wQP^WzNE
public void sort(int[] data) { e vrXo"3
int[] stack=new int[MAX_STACK_SIZE]; u frW\X
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int top=-1; ~]pE'\D7Ad
int pivot; )uj Ex7&c
int pivotIndex,l,r; OGde00
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stack[++top]=0; &x[E;P*Fg
stack[++top]=data.length-1; }!"A! ~&
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while(top>0){ v 1z
int j=stack[top--]; \K@'Z
int i=stack[top--]; Cjqklb/
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pivotIndex=(i+j)/2; C([phT;
pivot=data[pivotIndex]; Vr6@>@SC
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SortUtil.swap(data,pivotIndex,j); *.sVr7=j
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file://partition %W%9j#!aN
l=i-1; 10<x.8fSP
r=j; !46RGU:I
do{ 0E,8R{e
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); cik!GA
SortUtil.swap(data,l,r); Pz>s6 [ob
} !c}O5TI|#
while(l SortUtil.swap(data,l,r); Hyb3 ;yQ
SortUtil.swap(data,l,j); _/uFsYC
K/tRe/t}
if((l-i)>THRESHOLD){ 6-yd]("
stack[++top]=i; OMWbZ>jB
stack[++top]=l-1; U1DXeh~V
} lD^]\;?
if((j-l)>THRESHOLD){ ROg(U8
N
stack[++top]=l+1; 0fb`08,^
stack[++top]=j; u.d).da
} pP*zq"o
C\/xl#e<@
} C~nzH,5
file://new InsertSort().sort(data); ^B(V4-|
insertSort(data); !/}O>v~o
} =Z P%mW&;}
/** WM| dKF
* @param data wfU7G[
*/ eqP&8^HP
private void insertSort(int[] data) { "^w]_^GD$d
int temp; w[9|cgCY
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Bg&i63XL$$
} /2UH=Q!x4E
} :*ing
} 0y
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} xIxn"^'
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归并排序: 5b!vgm#])
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package org.rut.util.algorithm.support; uJFdbBDSh
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import org.rut.util.algorithm.SortUtil; yRSTk2N@
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/** MaRi+3F
* @author treeroot N}pw74=1
* @since 2006-2-2 [q/Abz'i
* @version 1.0 2"Ecd
*/ @6{~05.p
public class MergeSort implements SortUtil.Sort{ cxA ^:3
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/* (non-Javadoc) lDOCmdt@N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :p]'32FA!
*/ b4E:Wn9x
public void sort(int[] data) { lV1G<qP
int[] temp=new int[data.length]; [`^a=:*
mergeSort(data,temp,0,data.length-1); (yF:6$:#
} zA$k0p
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private void mergeSort(int[] data,int[] temp,int l,int r){ l^|UCgRn
int mid=(l+r)/2; Sz^
veh?
if(l==r) return ; k 8UO9r[
mergeSort(data,temp,l,mid); 1u:
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mergeSort(data,temp,mid+1,r); 6^]!gR#B
for(int i=l;i<=r;i++){ txiP!+3OWB
temp=data;
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} RRRCS]y7$t
int i1=l; MYla OT
int i2=mid+1; ^Wc@oa`
for(int cur=l;cur<=r;cur++){
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if(i1==mid+1) FrTi+& <
data[cur]=temp[i2++]; AWP"b?^G|
else if(i2>r) ]|MEx{BG-
data[cur]=temp[i1++]; A%`[mc]4#
else if(temp[i1] data[cur]=temp[i1++];
k\WR ]
else 1#.>a$>
data[cur]=temp[i2++]; G'6@+$ppS
} Qp/QaVQ+
} Tav*+
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} 9?0^ap,T
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改进后的归并排序: vg3=8>#
W_kHj}dj,p
package org.rut.util.algorithm.support; kPVO?uO
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import org.rut.util.algorithm.SortUtil; lrv3fPIW
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/** Zrvz;p@~
* @author treeroot !q9+9 *6
* @since 2006-2-2 2
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* @version 1.0 ~kZ G{
*/ ~ vJ,`?
public class ImprovedMergeSort implements SortUtil.Sort { W7 Cc
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private static final int THRESHOLD = 10; VO$
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/* MrDc$p W G
* (non-Javadoc) %kdEun
* 0URji~?|x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c
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*/ 4WJ.^ (
public void sort(int[] data) { qMLD)rL
int[] temp=new int[data.length]; dR"@`
mergeSort(data,temp,0,data.length-1); d5oIH
} Y8o)FVcyNy
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private void mergeSort(int[] data, int[] temp, int l, int r) { Z/t+8;TMR,
int i, j, k; Jh
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int mid = (l + r) / 2; Cq%IE^g<
if (l == r) )rekY;
return; D|Q#gcWp o
if ((mid - l) >= THRESHOLD) ,6om\9.E@
mergeSort(data, temp, l, mid); {buo^kgj`]
else @}@Z8$G^
insertSort(data, l, mid - l + 1); O*0l+mop
if ((r - mid) > THRESHOLD) YhDtUt}?
mergeSort(data, temp, mid + 1, r); G&4&-<
else M+w=O!dq
insertSort(data, mid + 1, r - mid); !"\80LP
J[4mLU
for (i = l; i <= mid; i++) { i70wrW#k
temp = data; ]=>F.GE
} &ge "x{,?
for (j = 1; j <= r - mid; j++) { 4scNSeW
temp[r - j + 1] = data[j + mid]; i[?Vin
} >AcrG]
int a = temp[l]; Ib+Y~
XYR
int b = temp[r]; V+VkY3
for (i = l, j = r, k = l; k <= r; k++) { 4<k9?)~(J
if (a < b) { /+@p7FqlE
data[k] = temp[i++]; }Q=!Y>Tc
a = temp; e A#;AQm
} else { T3k#VNH
data[k] = temp[j--]; vvKEv/pN7
b = temp[j]; Y?(r3E^x
} b/C`Jp
} {=F/C,-
} QNpqdwu%h
S/4^ d &Gr
/** QWzB6H]
* @param data Sgp;@4`M
* @param l px}|Mu7z~
* @param i >_|O1H./4
*/ EUN81F?
private void insertSort(int[] data, int start, int len) { [%77bv85.G
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x
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} P] UJ0b
} "4uS3h2r
} C/TF-g-_Y
} e>(<eu~P
TWQG591
堆排序: SjwyLc
E0MGRI"me
package org.rut.util.algorithm.support; _nbBIaHN{
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import org.rut.util.algorithm.SortUtil; bO'Sgc[]
@I_8T$N=
/** =8; {\
* @author treeroot aC%m- m
* @since 2006-2-2 uF1~FKB
* @version 1.0 D"ND+*Q[X
*/ b\-&sM(W"
public class HeapSort implements SortUtil.Sort{ f]JM /
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/* (non-Javadoc) rL+!tH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]3KhgK%c8
*/ CS==A57I
public void sort(int[] data) { li0i"
MaxHeap h=new MaxHeap(); &8l%T'gd
h.init(data); eS<lwA_
for(int i=0;i h.remove(); @8;W \L$~1
System.arraycopy(h.queue,1,data,0,data.length); /J:bWr
} BV>\ McI+
.pN`;*7`
private static class MaxHeap{ 0},PJ$8x
[&&1j@LQ*
void init(int[] data){ m0c P (
this.queue=new int[data.length+1]; rzh#CnL3
for(int i=0;i queue[++size]=data; !+L/Khw/C
fixUp(size); ]y,==1To
} rld67'KcE
} rmE" rf
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private int size=0; {
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Gcig*5
private int[] queue; ~ ; -! n;
N1|$$9G+
public int get() { ZE2$I^DY-
return queue[1]; 0IfKJ*]M
} XI22+@d6
IFDZfx
public void remove() {
'+$EhFwD
SortUtil.swap(queue,1,size--); }lfnnK#
fixDown(1); dVsE^jsL
} $D}{]MN.
file://fixdown /XhIx\40l
private void fixDown(int k) { =u+d_'P7-R
int j; 2UFv9
while ((j = k << 1) <= size) { )e a :Q?
if (j < size %26amp;%26amp; queue[j] j++; (Nx;0"5IX
if (queue[k]>queue[j]) file://不用交换 h\PHKC2
break; J,AR5@)1
SortUtil.swap(queue,j,k); _c,'>aH=
k = j; 1. rj'
} L(khAmm
} l PK
+$f$
private void fixUp(int k) { ,=|ZB4HA
while (k > 1) { }w1~K'ck}>
int j = k >> 1; QoG cWJ
if (queue[j]>queue[k]) 1;mW,l'`
break; 72oF ,42y
SortUtil.swap(queue,j,k); p\JfFfC
k = j; Um: Hrjw
} dO4{|(z
}
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!kE-_dY6)
} ;ByOth|9P
/6h(6 *JI
} CC@.MA@9N
_h":>
SortUtil: 9Iz%ht
hb^7oq"a
package org.rut.util.algorithm; "V$Bnz\n
w*|7!iM
import org.rut.util.algorithm.support.BubbleSort; uvV;Mlo]
import org.rut.util.algorithm.support.HeapSort; v0YG,)_
import org.rut.util.algorithm.support.ImprovedMergeSort; opJMS6%r
import org.rut.util.algorithm.support.ImprovedQuickSort; bIEhgiH
import org.rut.util.algorithm.support.InsertSort; !X<~-G2)l
import org.rut.util.algorithm.support.MergeSort; cdG|m[
import org.rut.util.algorithm.support.QuickSort; kjtjw1\o
import org.rut.util.algorithm.support.SelectionSort; 9M1d%jT
import org.rut.util.algorithm.support.ShellSort; "sl1vzRN
]@0NO;bK>F
/** :P@rkT3Q t
* @author treeroot ]- 4QNc=
* @since 2006-2-2
NsJ(`zk:
* @version 1.0 a(v>Q*zNP
*/ !}r%
u."
public class SortUtil { NN1$'"@NL
public final static int INSERT = 1; ?HV`|
Cw
public final static int BUBBLE = 2; X_g 3rv1J
public final static int SELECTION = 3; {FG|\nPw
public final static int SHELL = 4; EoxQ
*/
public final static int QUICK = 5; e&qh9mlE
public final static int IMPROVED_QUICK = 6; kJ-*fe'S
public final static int MERGE = 7; aBw2f[mo
public final static int IMPROVED_MERGE = 8; * C6a?]
public final static int HEAP = 9; rn=m\Gv
e
sSQs#+&=[
public static void sort(int[] data) { `A,g] 1C:
sort(data, IMPROVED_QUICK); A%{W{UP8N
} |R#"Th6mH!
private static String[] name={ n Ml%'[u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mK [0L
}; -atGlu2
_Jt 2YZdA
private static Sort[] impl=new Sort[]{ i6 (a@KRY
new InsertSort(), ZU9c 5/J
new BubbleSort(), OKvPL=~
new SelectionSort(), y:vxE8$Q
new ShellSort(), DANw1_X\
new QuickSort(), BZXUwqEh
new ImprovedQuickSort(), =T7A]U]
new MergeSort(), Z t&6Ua[Y}
new ImprovedMergeSort(), @bnG:np
new HeapSort() K&U7H:
}; z ly unJD(
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public static String toString(int algorithm){ DVkB$2]
return name[algorithm-1]; v^_mFp-}\
} {|yob4N
"n=vN<8(o
public static void sort(int[] data, int algorithm) { n]u<!.X
impl[algorithm-1].sort(data); yH<$k^0r*
} OHflIeq#@
$Tb G+Eb8
public static interface Sort { a<A+4uXyD
public void sort(int[] data); Ii^5\v|C
} %O<%UmR
8B#GbS
K
public static void swap(int[] data, int i, int j) { = 07]z@s
int temp = data; 4L73]3&
data = data[j]; bug
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data[j] = temp; gt7VxZ
} 0^8)jpL$<9
} W.1As{