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。 [hS?d.D
插入排序: p\8cl/~
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package org.rut.util.algorithm.support; E `)p,{T
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import org.rut.util.algorithm.SortUtil; 0n,5"B
/** [j0I}+@4H
* @author treeroot BifA&o%
* @since 2006-2-2 ~&~%q u
* @version 1.0 .so{ RI
*/ ?8(`tS(_?
public class InsertSort implements SortUtil.Sort{ S~F:%@,*
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/* (non-Javadoc) As (C8C<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h& (@gU`A
*/ 2`vCQV
public void sort(int[] data) { Q[p0bD:
int temp; Md
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for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); G6eC.vU]j
} xM;gF2
} asW1GZO
} FV$= l
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} fwAN9zs
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冒泡排序: ),\>'{~5&
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package org.rut.util.algorithm.support; }]zmp/;a
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import org.rut.util.algorithm.SortUtil; {zUc*9
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/** n/8Kb.Vf
* @author treeroot Xx|&%b{{r
* @since 2006-2-2 ^l^_ K)tw*
* @version 1.0 #s#z@F
*/ G-3.-
public class BubbleSort implements SortUtil.Sort{ #K!Df%,<
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/* (non-Javadoc) *!9/`zW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :/vB,JC
*/ U&3*c+B4
public void sort(int[] data) { !icpfxOpjQ
int temp;
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for(int i=0;i for(int j=data.length-1;j>i;j--){ R/^JyL
if(data[j] SortUtil.swap(data,j,j-1); cT0utR&
} X_'.@q<!CV
} Z{p6Q1u
} Sc6wC H
} X=\#n-*
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} I I>2\d|
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选择排序: $xu?zd"
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package org.rut.util.algorithm.support; % C
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import org.rut.util.algorithm.SortUtil; @5?T]V g
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/** Ve8!
* @author treeroot ImV54h'
* @since 2006-2-2 J.<%E[
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* @version 1.0 oo Z-T>$
*/ #dpt=
public class SelectionSort implements SortUtil.Sort { .897Z|$VB
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/* s3+O=5
* (non-Javadoc) f]'@Vt>
* g?>AY2f[5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Vw{Ys6q
*/ T?\CAk>
public void sort(int[] data) { @zJI0_Bp
int temp; Nr[Rp
for (int i = 0; i < data.length; i++) { ?UfZ VyHv+
int lowIndex = i; sN
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for (int j = data.length - 1; j > i; j--) {
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if (data[j] < data[lowIndex]) { sd[QtK^
lowIndex = j; 6#KI?
6
} poe Xi\e!(
} 2YN`:"
SortUtil.swap(data,i,lowIndex); P+b^;+\1s
} n21$57`4
}
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} `{wku@
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Shell排序: g\-3c=X
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package org.rut.util.algorithm.support; OV/FQH;V
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import org.rut.util.algorithm.SortUtil; dI!/:x
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/** +wUhB\F
*
* @author treeroot 0l6iv[qu5w
* @since 2006-2-2 ? g{,MP5
* @version 1.0 v 2 GhR*
*/ NNE,|
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public class ShellSort implements SortUtil.Sort{ 1hviT&
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/* (non-Javadoc) :'dc=C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IA^)`l 7H
*/ [~<',,tA0|
public void sort(int[] data) { z{g<y^Im+E
for(int i=data.length/2;i>2;i/=2){ k@aP&Z~
for(int j=0;j insertSort(data,j,i); \Ep/'Tj&
} H ZLOn
} #(IMRdUf
insertSort(data,0,1); mG~y8nUtp
} t60/f&A#7H
y:OywIi(
/** I|IlFu?O=
* @param data ZY!pw6R1>*
* @param j is?&%VY
* @param i k6-n.Rl01
*/ 0o|,& K
private void insertSort(int[] data, int start, int inc) { =+h!JgY/L
int temp; E@jl: -*E
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ,;P`Mf'YC
} IA`8ie+
} ~fp+@j-A
}
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} Hs}"A,V
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快速排序: TcLaWf!c5
9H}iX0O
package org.rut.util.algorithm.support; x\hn;i<
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import org.rut.util.algorithm.SortUtil; %H}Y]D~R
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/** K}=8:BaUL
* @author treeroot a^T4\
* @since 2006-2-2 R,w54},
* @version 1.0 <oaBh)=7
*/ Px7g\[]
public class QuickSort implements SortUtil.Sort{ &/hr-5k
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/* (non-Javadoc) aho<w+l@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ ]AC!R{H
public void sort(int[] data) { @oqi@&L'C
quickSort(data,0,data.length-1); v6P~XK}G
} r{!"%03H_
private void quickSort(int[] data,int i,int j){ Ddl% V7
int pivotIndex=(i+j)/2; v8vh~^X%P
file://swap g.Caapy
SortUtil.swap(data,pivotIndex,j); ~2A$R'x b
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int k=partition(data,i-1,j,data[j]); [OoH5dD
SortUtil.swap(data,k,j); ,Z*3,/a
if((k-i)>1) quickSort(data,i,k-1); svq9@!go
if((j-k)>1) quickSort(data,k+1,j); u};]LX\E
:YJ7J4
} %AEK[W+0
/** ;vv!qBl|@
* @param data x:n9dm
* @param i 3^A/`8R7K
* @param j itC *Z6^
* @return `m@]
*/ ]~
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private int partition(int[] data, int l, int r,int pivot) { lq\'
do{ _> |R-vQ8
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); o9T@uWh+
SortUtil.swap(data,l,r); (|36!-(iK
} c6Yf"~TD0
while(l SortUtil.swap(data,l,r); KXx@
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return l; PK2Rj%
} j""y2c1
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} Pi"~/MGP$
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改进后的快速排序: ph8Jn+|E
p'Y&Z?8
package org.rut.util.algorithm.support; {7K'<ti
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import org.rut.util.algorithm.SortUtil; u>t|X}JH
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/** \`P2Yq
* @author treeroot w;yiX<t<
* @since 2006-2-2 o%/-5-
* @version 1.0 \8>
*/ -40'[a9E
public class ImprovedQuickSort implements SortUtil.Sort { q:2aPfo&
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private static int MAX_STACK_SIZE=4096; Ism^hyL
private static int THRESHOLD=10; [)Z'N/;0
/* (non-Javadoc) KMxNH,5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3~[`[4n^
*/ O8K@&V p
public void sort(int[] data) { #D|!
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int[] stack=new int[MAX_STACK_SIZE]; =_$XP
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int top=-1; krQl^~@
int pivot; 18DTv6?QG
int pivotIndex,l,r; XKz;o^1a^
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stack[++top]=0; 4zo4H~@gk
stack[++top]=data.length-1; D~G5]M,}$
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while(top>0){ _u:>1]
int j=stack[top--]; (v|r'B9b
int i=stack[top--]; q[{:
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pivotIndex=(i+j)/2; +3M$3w{2
pivot=data[pivotIndex]; ^=eq .(>
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SortUtil.swap(data,pivotIndex,j); t{/hkXq]
u]
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file://partition hnp`s%e,
l=i-1; j2RRSz&9
r=j; BQyvj\uJ
do{ YniZ(
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while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); IZv~[vi_
SortUtil.swap(data,l,r); aQ(`6DQv
} nqZA|-}
while(l SortUtil.swap(data,l,r); 7m@
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SortUtil.swap(data,l,j); ,/i_QgP
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if((l-i)>THRESHOLD){ 54<6Dy f
stack[++top]=i; oS~}TR:}
stack[++top]=l-1; q^Z~IZ8IT
} K1:a]aU?Iu
if((j-l)>THRESHOLD){ D`~JbKV5@^
stack[++top]=l+1; wb]*u7G
t/
stack[++top]=j; -u6}T!
} 7N>oY$&)
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} Q(lku"U'
file://new InsertSort().sort(data); %moJF1
insertSort(data); tC2N>C[N
} c\M#5+ 1j
/** >[a FOA
* @param data 5 d+<EF+N
*/ HeCcF+
private void insertSort(int[] data) { [_h%F,_ A
int temp; SC'BmR"ox
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); CoJ55TAW
} Xq|nJ|h
} !L77y^oV
} Y[Es
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} aM), M]m[
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归并排序: T j`y J!0
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package org.rut.util.algorithm.support; yIOLs}!SF
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import org.rut.util.algorithm.SortUtil; B
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/** ob'n{T+lZ
* @author treeroot @;m$ua*|:
* @since 2006-2-2 6yI}1g
* @version 1.0 >\ZR*CS
*/ l)Zs-V!M^\
public class MergeSort implements SortUtil.Sort{ =2,0Wo]$
i&A%"lOI9
/* (non-Javadoc) u?kD)5Nk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YdI0E
*/ < A?<N?%o
public void sort(int[] data) { noC?k }M
int[] temp=new int[data.length]; )r9b:c\
mergeSort(data,temp,0,data.length-1); Sj)}qM-y#
} YX*0?S
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private void mergeSort(int[] data,int[] temp,int l,int r){ <qhBc:kc
int mid=(l+r)/2; }E; F)=E
if(l==r) return ; 8Mu;U3cIW
mergeSort(data,temp,l,mid); ,)h)5o(?
mergeSort(data,temp,mid+1,r); Q2/.6O8
for(int i=l;i<=r;i++){ ;LRW
8Wd
temp=data; 1zjaR4Tf
} KFDS q"j
int i1=l; g_w&"=.jBq
int i2=mid+1; i-W
for(int cur=l;cur<=r;cur++){ EvE,Dm?h
if(i1==mid+1) =Ikg.jYq&F
data[cur]=temp[i2++]; \cQ .|S
else if(i2>r) g{>^`JtP
data[cur]=temp[i1++]; K=6UK%y
A
else if(temp[i1] data[cur]=temp[i1++]; 3]U]?h
else sG,+
data[cur]=temp[i2++]; >qR~'$,$
} #U=;T]!'$
} }"zC
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} 8g*hvPc
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改进后的归并排序: }nud
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package org.rut.util.algorithm.support; d~*TIN8Ke~
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import org.rut.util.algorithm.SortUtil; 6)e5zKW!?
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/** 0JY WrPR
* @author treeroot 4nkE IZ
* @since 2006-2-2 &uM^0eM
* @version 1.0 I^3:YVR&
*/ :0^s0l
public class ImprovedMergeSort implements SortUtil.Sort { (/h5zCc/v
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private static final int THRESHOLD = 10; v6uxxsI>Hm
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/* Qw)9r{f
* (non-Javadoc) 8#LJ* o
* Zk?
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i0pU!`0
*/ wW`}VKu
public void sort(int[] data) { .q;ED`G
int[] temp=new int[data.length]; Q\kub_I{@
mergeSort(data,temp,0,data.length-1); ]hTb@.
} YaY8 `M{
UUtbD&\
private void mergeSort(int[] data, int[] temp, int l, int r) { IFuZ]CBz
int i, j, k; u oVNK
int mid = (l + r) / 2; Hs0pW5oZ
if (l == r) r;qzo.
return; tRfm+hqRZ
if ((mid - l) >= THRESHOLD) ;D2E_!N
dt
mergeSort(data, temp, l, mid); !3}deY8;#
else j"7
JLe*
insertSort(data, l, mid - l + 1); smU4jh9S
if ((r - mid) > THRESHOLD)
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mergeSort(data, temp, mid + 1, r); >+9JD%]x]
else 8 i0
insertSort(data, mid + 1, r - mid); h##WA=1QZ
[}o~PN:sT(
for (i = l; i <= mid; i++) { z,f=}t[.Y
temp = data; uV]ULm#,i
} %3=J*wj>D
for (j = 1; j <= r - mid; j++) { SUdm 0y
temp[r - j + 1] = data[j + mid]; <$E6oZ
} TKI$hc3|L
int a = temp[l]; U;^[$Aq
int b = temp[r]; )]Ti>R O7
for (i = l, j = r, k = l; k <= r; k++) { d*]Ew=^L
if (a < b) { mLwY]2T"
data[k] = temp[i++]; OtUrGQP
a = temp; %|"Qi]c d
} else { sH!O0WL
data[k] = temp[j--]; hR)2xz
b = temp[j]; | {P|.
} zV.pol
} 1]OSWCEm*[
} )pgrl
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/** %w"nDu2Gcv
* @param data F9Z@x)
* @param l e>H:/24
* @param i k DsIp=
*/ ;!u;!F!i
private void insertSort(int[] data, int start, int len) { |!*Xl)
]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); mh`|=M]8E
} hU {-a`
} =,/D/v$m'2
} =nxKttmU0
} vv5i? F
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堆排序: Ill[]O
ST',4Oph5
package org.rut.util.algorithm.support; ]> G&jd7
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import org.rut.util.algorithm.SortUtil; b-<HXn_Fd
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/** t&RruwN_;
* @author treeroot )|]dmQ-
* @since 2006-2-2 (4+1lOd
* @version 1.0 +!O-kd
*/ YD_]!HK}
public class HeapSort implements SortUtil.Sort{ y\PxR708
b:MG@Hxc
/* (non-Javadoc) ^%[F8\}XPJ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o$J6 ~dn
*/ wGLF%;rRe4
public void sort(int[] data) { q)I|2~Q c^
MaxHeap h=new MaxHeap(); ?d-70pm
h.init(data); U}AX0*S
for(int i=0;i h.remove(); NPJ.+ph
System.arraycopy(h.queue,1,data,0,data.length); A WJWtUa
} U[8{_h<#
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private static class MaxHeap{ ;VzMU ;j
b1^cD6sT+
void init(int[] data){ `deYi 2z
this.queue=new int[data.length+1]; Y1\K;;X
for(int i=0;i queue[++size]=data; w~@[r4W
fixUp(size); 32>x^>G=>
} A,XfD} +:Z
} =*MR(b>
\
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private int size=0; [)|+F
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private int[] queue; ]+%=@mWYs
uHvaZMu
public int get() { ExrY>*v
return queue[1]; MOHHZApt
} pj|X]4?wdI
@ss):FwA
public void remove() { uqZ3Hyb
SortUtil.swap(queue,1,size--); a$}6:E
fixDown(1); V
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} buYDl
file://fixdown u,9q<&,
private void fixDown(int k) { v33T @
int j; dR[o|r
while ((j = k << 1) <= size) { 7),*3c ')
if (j < size %26amp;%26amp; queue[j] j++; 8S>>7z!U
if (queue[k]>queue[j]) file://不用交换 U[fSQ`&D
break; r8v:|Q1"
SortUtil.swap(queue,j,k); 0wvU?z%WK
k = j; VGJDqm!
} +by|
} h48 bb.p2
private void fixUp(int k) { a4by^
while (k > 1) { Qj!d ^8
int j = k >> 1; 9dYOH)f
if (queue[j]>queue[k]) `|,tCM&-
break; fsI`DjKi)
SortUtil.swap(queue,j,k); @:gl:mc
k = j; /v$]X4 S`
} (xUFl@I!
} i'HST|!j
7}07Pit
} cYD1~JX.
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} }AAbhr9d}
V8v,jS$l4
SortUtil: q]l\`/R%u
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package org.rut.util.algorithm; ?>TbTfmR
Dauo(Uhuo
import org.rut.util.algorithm.support.BubbleSort; ee\Gl?VN
import org.rut.util.algorithm.support.HeapSort; >I:9'"`
import org.rut.util.algorithm.support.ImprovedMergeSort; ~ i'C/[P
import org.rut.util.algorithm.support.ImprovedQuickSort; LOt#1Qv
import org.rut.util.algorithm.support.InsertSort; .m'N7`VB
import org.rut.util.algorithm.support.MergeSort; _<Vg[-:1
import org.rut.util.algorithm.support.QuickSort; %\ _h7:
import org.rut.util.algorithm.support.SelectionSort; FJlsWh4,6=
import org.rut.util.algorithm.support.ShellSort; c0hdLl;5
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j
/** >oB ?
* @author treeroot ugRV5bUk
* @since 2006-2-2 ]Y$&78u8t
* @version 1.0 IjgBa-o/V
*/ A1 b6Zt
public class SortUtil { qG*_w
RF
public final static int INSERT = 1; .Btv}b
public final static int BUBBLE = 2; B~e7w 4
public final static int SELECTION = 3; uRs9}dzv
public final static int SHELL = 4; k0=|10bi
public final static int QUICK = 5; >sB=\
public final static int IMPROVED_QUICK = 6; 0-lPhnrp
public final static int MERGE = 7; =b|)Wnt2f
public final static int IMPROVED_MERGE = 8; <vO8_2,V-
public final static int HEAP = 9; b^;N>zx
O]4W|WI3
public static void sort(int[] data) { Ho:}Bn
g
sort(data, IMPROVED_QUICK);
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} :v''"+\
private static String[] name={ aB7d(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +}`p"<'u
}; |UABar b
aJ% e'F[
private static Sort[] impl=new Sort[]{ `W
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new InsertSort(), -aTg>Q|g&
new BubbleSort(), {Nzmb|&
new SelectionSort(), (4E.Li<O
new ShellSort(), }u38:(^`ai
new QuickSort(), <7@mg/T
new ImprovedQuickSort(), q^Q|.&_k /
new MergeSort(), tP/GDC;
new ImprovedMergeSort(), qT&S
new HeapSort() qYQUr8{
}; ~Q3WBOjn
,dGFX]P
public static String toString(int algorithm){ |% la
return name[algorithm-1]; rin >r0o
} rHA/
H@ 1[SKBl
public static void sort(int[] data, int algorithm) { 'Y,+D`&i)
impl[algorithm-1].sort(data); 9}? 5p]%
} \H"/2o%l")
l{B<"+8
public static interface Sort { Q#d+IIR0gK
public void sort(int[] data); 3D[:Rf[
} N9fUlXhR
q[Sp|C6x
public static void swap(int[] data, int i, int j) { Y2ah zB
int temp = data; ^D>/wX\u
data = data[j]; XPR:_
data[j] = temp; z22|Kv;w
} -wG[>Y
} Wb*T