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。 U2
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插入排序: lL,0IfC,
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package org.rut.util.algorithm.support; #&Rx?V
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import org.rut.util.algorithm.SortUtil; W$J@|i
/** AG|:mQO
* @author treeroot !O4)YM
* @since 2006-2-2 TiKfIv
* @version 1.0 h#Z~x
*/ cvC 7#i[G
public class InsertSort implements SortUtil.Sort{ @[#)zO
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/* (non-Javadoc) e
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \"9ysePI
*/ #Eqx Eo;
public void sort(int[] data) { 6M[OEI5
int temp; Bqw/\Lxwlf
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); SP4(yJy&
} P&Wf.qr{:
} SmV}Wf
} 'jYKfq~_cJ
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} xu@+b~C\
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冒泡排序: MC1&X'
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package org.rut.util.algorithm.support; j2oU1' b
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import org.rut.util.algorithm.SortUtil; #e[igxwi
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/** e"ClG/M_XS
* @author treeroot gRwRhA/
* @since 2006-2-2 lr=quWDY
* @version 1.0 cHJ4[x=
*/ Y8/&1s_
public class BubbleSort implements SortUtil.Sort{ A~;+P
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/* (non-Javadoc) |AS9^w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =<Ss&p>
*/ ,vB nr_D#
public void sort(int[] data) { a``Q}.ST
int temp; pwl7aC+6d
for(int i=0;i for(int j=data.length-1;j>i;j--){ VP^{-mDph
if(data[j] SortUtil.swap(data,j,j-1); o97*3W]
} vb$i00?
} {w]L'0ES[
} J"fv5{
} PQ"v
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} 8aVj@x$'
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选择排序: 1~S''[
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package org.rut.util.algorithm.support; :MGIp%3
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import org.rut.util.algorithm.SortUtil; }ok'd=M
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/** /a\]Dwj5
* @author treeroot k;HI-v
* @since 2006-2-2 gyobq'o-
* @version 1.0 >1q:-^
*/ 5KW
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public class SelectionSort implements SortUtil.Sort { 6>[J^k%~w)
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/* \cQ+9e)
* (non-Javadoc) bLO^5` 6
* ?}No'E1!I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ygxaT"3"=
*/ (]$&.gE.F
public void sort(int[] data) { Fyc":{Jd
int temp; pz]KUQ
for (int i = 0; i < data.length; i++) { <q=]n%nX
int lowIndex = i; }BiA@n,
for (int j = data.length - 1; j > i; j--) { d6A+pa'2
if (data[j] < data[lowIndex]) { 72dd%
lowIndex = j; *enT2Q
}
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} @e+qe9A|
SortUtil.swap(data,i,lowIndex); 8|Wl|@1(
} nr%P11U\c
} c22L]Sxo
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} wdRk+
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Shell排序: |^O3~!JP(>
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package org.rut.util.algorithm.support; JR|P]}
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import org.rut.util.algorithm.SortUtil; uy([>8uu
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/** p+Fh9N<F9
* @author treeroot D;Y2yc[v
* @since 2006-2-2 hmv*IF.
* @version 1.0 D\ P-|}
*/ BWzo|isv
public class ShellSort implements SortUtil.Sort{ GX N:=
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/* (non-Javadoc) >n5Kz]]%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6}:(m#+
*/ q ;e/gP2
public void sort(int[] data) { /Mw0<#
for(int i=data.length/2;i>2;i/=2){ oMKG M@V
for(int j=0;j insertSort(data,j,i); .FvIT]k-
} IDp2#qg_
} LF!S`|FF
insertSort(data,0,1); MYUL y2)
} dDqT#N?Y
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/** XpdjWLO]C<
* @param data $~T|v7Y%
* @param j 2l +t-
* @param i xsg55`
*/ kj`h{Wc[)
private void insertSort(int[] data, int start, int inc) { T>m|C}yy
int temp; 1fV\84m^
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); -\g@s@5
} xgWVxX^)
} D}?JX5.
} t=n@<1d
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} {QT:1U\.
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快速排序: tS[@?qP
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package org.rut.util.algorithm.support; w=ZK=@
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import org.rut.util.algorithm.SortUtil; j`-9.
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/** |k)Nf+(}W
* @author treeroot k'K 1zUBj
* @since 2006-2-2 }Q_ }c9?
* @version 1.0 ;uqi
*/ |@dY[VK>
public class QuickSort implements SortUtil.Sort{ (E \lLlN
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/* (non-Javadoc) }M${ _D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l8d }g
*/ dhi9=Co;
public void sort(int[] data) { G V% @A
quickSort(data,0,data.length-1); y{QF#&lW
} -aIB_
private void quickSort(int[] data,int i,int j){ hFDo{yI
int pivotIndex=(i+j)/2; <2fvEW/#v
file://swap i$z*~SuM#
SortUtil.swap(data,pivotIndex,j); z?(QM:
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int k=partition(data,i-1,j,data[j]); S[RVk=A1
SortUtil.swap(data,k,j); I>@Qfc
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if((k-i)>1) quickSort(data,i,k-1); 9S{0vc/2@
if((j-k)>1) quickSort(data,k+1,j); [?F]S:/i
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} j8ag}%
/** zG~nRt{4
* @param data KOD%>+vG$
* @param i Wq*W+7=.
* @param j #mc6;TRZO
* @return qZX\riR
*/ +qmV|$rmM
private int partition(int[] data, int l, int r,int pivot) { j.UO>1{7
do{ YJBf~0r
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); mA6Nmq%{ F
SortUtil.swap(data,l,r); LS4E.Xdn
} .Yxf0y?uv
while(l SortUtil.swap(data,l,r); $e,'<Jl
return l; $%5!CD1)
} DZV U!J
# |,c3$
} NV9H"fI
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改进后的快速排序: 7R>Pk9J
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package org.rut.util.algorithm.support; IHj9n>c)[
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import org.rut.util.algorithm.SortUtil; CI@qT}Y_
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/** W.
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* @author treeroot tCr?!Y~
* @since 2006-2-2 jUy$aGX
* @version 1.0 u'aWvN y+
*/ >w|2 ~oK
public class ImprovedQuickSort implements SortUtil.Sort { IoWK 8x
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private static int MAX_STACK_SIZE=4096; @'FO M
private static int THRESHOLD=10; /7Ft1f
/* (non-Javadoc) IJofbuzw:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Nrk/_0^
*/ sQ%gf
public void sort(int[] data) { K?acRi
int[] stack=new int[MAX_STACK_SIZE]; S$ 91L
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int top=-1; S$i3/t
int pivot; w-?Cg8bq<
int pivotIndex,l,r; x-@6U
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stack[++top]=0; +zSdP2s
stack[++top]=data.length-1; 6#1:2ZHKG
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while(top>0){ S&;D
int j=stack[top--]; |=ljN7]!
int i=stack[top--]; .l~g`._
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pivotIndex=(i+j)/2; +AL(K:
pivot=data[pivotIndex]; 7|q _JdKoU
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SortUtil.swap(data,pivotIndex,j); - x]gp5
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file://partition is}Y+^j.
l=i-1; T>pz?e^5&
r=j; !<j)D_
do{ '1Q [&
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); =bB7$#al
SortUtil.swap(data,l,r); 73kL>u
} v(z2,?/4
while(l SortUtil.swap(data,l,r); XGMO~8 3
SortUtil.swap(data,l,j); 'Mm=<Bh
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h
if((l-i)>THRESHOLD){ #"aL M6Cfs
stack[++top]=i; LkIbvJCV
stack[++top]=l-1; [5QbE$
} nN!R!tJPa
if((j-l)>THRESHOLD){ ?FwjbG<
stack[++top]=l+1; {-)*.l=
stack[++top]=j; x>~.cey
} =CjN=FM
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} UvM_~qo
file://new InsertSort().sort(data); dLy-J1h\
insertSort(data); {]dH+J7
} M[,G#GO
/** z+6%Ya&ls
* @param data DU1\ K
*/ Gu@Znh-D
private void insertSort(int[] data) { bdkxCt
int temp; 1PjqXgN5p
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); lF.yQ
} !0
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} '7TT4~F
} d3K-|
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} ,7|Wf
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归并排序:
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mL[Y{t#N
package org.rut.util.algorithm.support; *IBCThj
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import org.rut.util.algorithm.SortUtil; F 5FzT^
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/** m kHcGB!~
* @author treeroot 3Mt Alc0xp
* @since 2006-2-2 x$Tf IFy
* @version 1.0 W05>\Rl
*/ &[|P/gj#>
public class MergeSort implements SortUtil.Sort{ 5 ]v]^Y'?
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/* (non-Javadoc) hz~jyH.h_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *]RCfHo\=
*/ a#4 'X*
public void sort(int[] data) { SebJ}P1x
int[] temp=new int[data.length]; N_),'2
mergeSort(data,temp,0,data.length-1); Ig M_l=
} F(#~.i
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private void mergeSort(int[] data,int[] temp,int l,int r){ "/}cV5=Z
int mid=(l+r)/2; J{bNx8.&
if(l==r) return ; #Bgq]6G2
mergeSort(data,temp,l,mid); _F9O4Q4
mergeSort(data,temp,mid+1,r); .WT^L2l%
for(int i=l;i<=r;i++){ kw.IVz<
temp=data; mFXkrvOf,
} K7N.gT*4
int i1=l; a5xmIp@6
int i2=mid+1; q^k]e{PD
for(int cur=l;cur<=r;cur++){ @ME
.
if(i1==mid+1) N_Y*Z`Xb
data[cur]=temp[i2++]; /l@h[}g+d-
else if(i2>r) 2>!?EIE7
data[cur]=temp[i1++]; U?d4 ^
else if(temp[i1] data[cur]=temp[i1++]; Y94/tjt
else jJDYl( [
data[cur]=temp[i2++]; s55t>t,g6
} xRU ~hQ
} 4%L-3Ij
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} l`A4)8Y@
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改进后的归并排序: ,dO$R.h
)mb RG9P
package org.rut.util.algorithm.support; Z2x%
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import org.rut.util.algorithm.SortUtil; Qo;#}%}^^
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/** eX@7f!uz
* @author treeroot J\ V.J/
* @since 2006-2-2 GxR, 3
* @version 1.0 {BlKVsQ
*/ U\\nSU
public class ImprovedMergeSort implements SortUtil.Sort { ,@'M'S
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private static final int THRESHOLD = 10; Udh!%QP%[w
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/* w(xRL#%
* (non-Javadoc) 5Si\hk:o
* 'o*:~n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IAJYD/Y&?
*/ |rbl sL2?Z
public void sort(int[] data) { ax)j$
int[] temp=new int[data.length]; :9Vd=M6,
mergeSort(data,temp,0,data.length-1); +e6c4Tw/
} a|v}L,
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private void mergeSort(int[] data, int[] temp, int l, int r) { +.b@rU6H
int i, j, k; S"z cSkF
int mid = (l + r) / 2; ]$vJK
if (l == r) N3`W%ws`~
return; 2%DleR'i
if ((mid - l) >= THRESHOLD) gxku3<S
mergeSort(data, temp, l, mid); EdPN=
else F|DKp[<]8
insertSort(data, l, mid - l + 1); "n3i(sZ
if ((r - mid) > THRESHOLD) ;5.o;|w?!
mergeSort(data, temp, mid + 1, r); 6!3Jr
else I:qfB2tL)O
insertSort(data, mid + 1, r - mid); n6a*|rE
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for (i = l; i <= mid; i++) { iC{~~W6
temp = data; G{cTQH|
} r_kw "9
for (j = 1; j <= r - mid; j++) { ab=s+[r1
temp[r - j + 1] = data[j + mid]; hR$lX8
} IHg)xZ
int a = temp[l]; L#`9# Q
int b = temp[r]; v0dFP0.;&
for (i = l, j = r, k = l; k <= r; k++) { f~.w2Cna
if (a < b) { /~LXY<-(
data[k] = temp[i++]; ^!*?vHx:
a = temp; Z-{!Z;T)z
} else { (&6C,O~n^.
data[k] = temp[j--]; /I'n]
b = temp[j]; ?]=fC{Rh
} lK?
Z38
} / h6(!-"
} Z`?<A da
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/** $<UX/a\sH
* @param data 0)8QOTeT
* @param l ItTIU
* @param i JL9d&7-
*/ lbES9o5
private void insertSort(int[] data, int start, int len) { O^]I>A#d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8dw]i1t<
} FNDLqf!j
} sQA{[l!aj
} {1GW,T!#
} LC/w".oq?
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堆排序: tH:K6^oR
}eX_p6bBw
package org.rut.util.algorithm.support; X*~NE\
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import org.rut.util.algorithm.SortUtil; +fhyw{
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/** R0<ka[+
* @author treeroot n;"4`6L~
* @since 2006-2-2 |zu>G9m
* @version 1.0 K)qbd~<\
*/ sQ^>.yG
public class HeapSort implements SortUtil.Sort{ Y\T*8\h_[
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/* (non-Javadoc) ~zz |U!TG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ru`;cXa,
*/ T^a {#B
public void sort(int[] data) { 13Z6dhZu
MaxHeap h=new MaxHeap(); ;f-|rC_"
h.init(data); W4CI=94
for(int i=0;i h.remove(); $/C<^}A
System.arraycopy(h.queue,1,data,0,data.length); 71tMX[x
} ]tZ5XS
h6x+.}}
private static class MaxHeap{ &1Fcwj
EGwY|+3
void init(int[] data){ K74oRKv
this.queue=new int[data.length+1]; GtO5,d_
for(int i=0;i queue[++size]=data; !9"R4~4
fixUp(size); {I 7pk6Qd
} P:k(=CzZ@J
} w c%
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private int size=0; (W/jkm
#|XEBOmsQ
private int[] queue; 0iXqAa
=X X_Cnn
public int get() { V8Q#%#)FHe
return queue[1]; 5?kA)!|UB
} Wsz='@XvB
<J-OwO a-1
public void remove() { 8"LaP3U
SortUtil.swap(queue,1,size--); %FFw!eVi
fixDown(1); :,q3?l6
}
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/
file://fixdown QBsDO].J<
private void fixDown(int k) { w#mnGD
int j; sW2LNE
while ((j = k << 1) <= size) { `^J~^Z7Y-
if (j < size %26amp;%26amp; queue[j] j++; %Y Rg1UKY
if (queue[k]>queue[j]) file://不用交换 &`L5UX
break; \N#)e1.0P
SortUtil.swap(queue,j,k); xN"KSQpu
k = j; \Di~DN1
} pjj
5
} )dL?B9d:
private void fixUp(int k) { rF0zGNH
while (k > 1) { ^RWt
int j = k >> 1; P'9aZd
if (queue[j]>queue[k]) om_&|9B)
break; 4_.k Q"'DH
SortUtil.swap(queue,j,k); J|FyY)_
k = j; &<Gq-IN
} 1]>KuXd
r
} j|G-9E
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} g41Lh3dj
gy =`c MS@
} ` 4EOy:a
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u@N9M
SortUtil: @I"Aet'XV
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R
package org.rut.util.algorithm; C-Fp)Zs{0
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import org.rut.util.algorithm.support.BubbleSort; 8]?1gDS|9O
import org.rut.util.algorithm.support.HeapSort; W=EO=}l#
import org.rut.util.algorithm.support.ImprovedMergeSort; UiZ61lw
import org.rut.util.algorithm.support.ImprovedQuickSort; Gm2rjpZeq
import org.rut.util.algorithm.support.InsertSort; UdI>x 4bI
import org.rut.util.algorithm.support.MergeSort; 1M;)$m:
import org.rut.util.algorithm.support.QuickSort; .sG,TLE[<
import org.rut.util.algorithm.support.SelectionSort; ONjc},_
import org.rut.util.algorithm.support.ShellSort; O[L8(+Sn
'6 'XBL?
/** >Au<y,Tw
* @author treeroot >A,WXzAK}S
* @since 2006-2-2 3N*Shzusbt
* @version 1.0 G>RYQ{O
*/ C(0Iv[~y/
public class SortUtil { ^p7(
public final static int INSERT = 1; =hs@W)-O
public final static int BUBBLE = 2; PRz oLzr
public final static int SELECTION = 3; %xZ.+Ff%
public final static int SHELL = 4; F{"%ey">
public final static int QUICK = 5; kN$70N7I;
public final static int IMPROVED_QUICK = 6; >(*jbL]p
public final static int MERGE = 7; f<;9q?0V F
public final static int IMPROVED_MERGE = 8; -KNJCcBJ
public final static int HEAP = 9; a;S^<8
UUU^YT \
public static void sort(int[] data) { ppnj.tLz;r
sort(data, IMPROVED_QUICK); p 5o;Rvr
} &V:dcJ^Q
private static String[] name={ ]czy8n$+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )[K3p{4
}; ibuI/VDF
#]
GM#.
private static Sort[] impl=new Sort[]{ U KJY.W!w4
new InsertSort(), Q]7Q
new BubbleSort(), 2DC#PX)i
new SelectionSort(), `P5"5N\h
new ShellSort(), .~U9*5d
new QuickSort(), l46F3C|
new ImprovedQuickSort(), 0/gcSW
b
new MergeSort(), ;?o C=c
new ImprovedMergeSort(), Kmnr}Lp9
new HeapSort() K?tk&0
}; /<
:;^B
"QF083$
public static String toString(int algorithm){ W^N"y&
return name[algorithm-1]; +i>q;=~
} @ubz?5
\fz
j fZ1n
public static void sort(int[] data, int algorithm) { 5VTbW
impl[algorithm-1].sort(data); []]3"n
} g7P1]CZ}
|:#mw1
public static interface Sort { E nvs[YZe
public void sort(int[] data); 9>#|~P&FE
} JJ~?ON.H
_)l %-*Z7p
public static void swap(int[] data, int i, int j) { gCJ'wv)6|%
int temp = data; W$JA4O>b
data = data[j]; XJzXxhk2
data[j] = temp; dc>y7$2
} itF+6wv~
} ?W
n(ciO