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。 ,b2O^tJF#
插入排序: 1*c0\:BQ;z
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package org.rut.util.algorithm.support; e+]YCp[(
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import org.rut.util.algorithm.SortUtil; f:)K
/** tZJ
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* @author treeroot i?P]}JENM
* @since 2006-2-2 z-{"pI
* @version 1.0 W~W?<%@
*/ *aSR KY
public class InsertSort implements SortUtil.Sort{ &CPe$'FYI
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/* (non-Javadoc) eAenkUBz6,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q) zu}m
*/ 45!`g+)
public void sort(int[] data) { S+e-b'++?
int temp; 0SGczgg
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); w
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} ZT3jxwe
} U_zpLpm^
} x""Mxn]gD
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} HzO0K=Z=R0
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冒泡排序: )}zA,FOA*
Qbe{/
package org.rut.util.algorithm.support; j:vD9sdQ
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import org.rut.util.algorithm.SortUtil; ,XF6Xsg2
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/** lw/
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* @author treeroot 4*ty&s=5OJ
* @since 2006-2-2 c,u$tnE)
* @version 1.0 {F{[!.
*/ @Ig,_i\UY:
public class BubbleSort implements SortUtil.Sort{ &55uT;7] a
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/* (non-Javadoc) ogh2kht
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0,i+
*/ -7A!2mRiz
public void sort(int[] data) { []]LyWk
int temp; hzf}_1
for(int i=0;i for(int j=data.length-1;j>i;j--){ , K"2tb
if(data[j] SortUtil.swap(data,j,j-1); `A}{
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} eJwii
} ^Qb!k/$3y
} e\bF_
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} qz_TcU'
s-YV_
} _o=`-iy9
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选择排序: n6-!@RYr
9#=IrlV4
package org.rut.util.algorithm.support; 5x L,~"
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import org.rut.util.algorithm.SortUtil; `&&6-/
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/** oR%E_g?mI~
* @author treeroot )F9%^a(
* @since 2006-2-2 zj$Z%|@$
* @version 1.0 a0v1LT6
*/ =<tJAoVV
public class SelectionSort implements SortUtil.Sort { -:1Gr8
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/* t+Tg@~K2[>
* (non-Javadoc) (^OC%pc
* I{P$B-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P)o[p(
*/ I7-PF?
public void sort(int[] data) { \=:g$_l
int temp; 98%a)s)(a
for (int i = 0; i < data.length; i++) { ^O\1v
int lowIndex = i; z%-"'Y]
for (int j = data.length - 1; j > i; j--) { b*%WAVt2T
if (data[j] < data[lowIndex]) { <k8rSxn{
lowIndex = j; f\%X7.
} xVmUmftD
} <P)%Ms
SortUtil.swap(data,i,lowIndex); orN2(:Ct7
} FU3IK3}
} <8}9s9Nk
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} _:z;j{@4
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Shell排序: PYRwcJ$b\d
!"qEB2r
package org.rut.util.algorithm.support; ~d1RD
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import org.rut.util.algorithm.SortUtil; peP:5WB
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/** \V7x3*nA
* @author treeroot Dl!'_u
* @since 2006-2-2 P_}_D{G
* @version 1.0 k/f_@8
*/ ZkG##Jp\>
public class ShellSort implements SortUtil.Sort{ 4w
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/* (non-Javadoc) P6Ol+SI#m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lu(Omds+
*/ +/^q"/f F
public void sort(int[] data) { d=Ihl30m
for(int i=data.length/2;i>2;i/=2){ PzG:M7
for(int j=0;j insertSort(data,j,i); @!tmUme1c
} M)It(K8R
} 2FtEt+A+'
insertSort(data,0,1); Vf2!0
} wZolg~dg
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/** RB
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* @param data O&1p2!Bk4
* @param j "e?#c<p7
* @param i Y+PxV*"a
*/ f;I"tugO
private void insertSort(int[] data, int start, int inc) { R(#;yn
int temp; KuAGy*:4T
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); +mel0ZStS
} R}YryzV5
} kxiyF$
9
} (W6\%H2u
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} ' <jp.sZQ
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快速排序: {twf7.eY
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package org.rut.util.algorithm.support; t z>X'L
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import org.rut.util.algorithm.SortUtil; :)S4MoG
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/** r]vBr^kq
* @author treeroot &l)v'
* @since 2006-2-2 0iq$bT|
* @version 1.0 z~;qDf|I
*/ 57%cN-v*
public class QuickSort implements SortUtil.Sort{ O-m}P
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/* (non-Javadoc) P =Gb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zTzG&B-
*/ ^E,UcK;
public void sort(int[] data) { aj~@r3E;
quickSort(data,0,data.length-1); ;^SgV
} 3W00,f^9
private void quickSort(int[] data,int i,int j){ ijSYQ
int pivotIndex=(i+j)/2; Vc<n6
file://swap DdW8~yI&
SortUtil.swap(data,pivotIndex,j); 745PCC'FK
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int k=partition(data,i-1,j,data[j]); M0\[hps~X
SortUtil.swap(data,k,j); S5p\J!k\B
if((k-i)>1) quickSort(data,i,k-1); ^ @cX0_
if((j-k)>1) quickSort(data,k+1,j); 9%veUvY
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T;
} D($UbT-v
/** )W#g@V)>
* @param data 1e%Xyqb
* @param i Vi~+C@96
* @param j MH(g<4>*
* @return Y&%0 eI!
*/ SQvB)NOw
private int partition(int[] data, int l, int r,int pivot) { 4IpFT; `q
do{ ,)m-nZ5
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); *38\&"s4_
SortUtil.swap(data,l,r); ;\0RXirk
} 2,`mNjHh
while(l SortUtil.swap(data,l,r); 7hE=+V8
return l; H*<dte<
} NV ~i4R*#
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} e6a8ad
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改进后的快速排序: G*V
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package org.rut.util.algorithm.support; At:C4>HE@
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import org.rut.util.algorithm.SortUtil; 1z!Lk*C)
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/** :RG6gvz
* @author treeroot p8bTR!rvz
* @since 2006-2-2 TR7TF]itb
* @version 1.0 A>S2BL#=
*/ l0)6[yXK
public class ImprovedQuickSort implements SortUtil.Sort { ZmF32Ir
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private static int MAX_STACK_SIZE=4096; 6f1Y:qK'@
private static int THRESHOLD=10; *GnO&&m'B
/* (non-Javadoc) >@W#@W*I@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XS@6jbLE
*/ A}O9e
public void sort(int[] data) { +[qy HTcG
int[] stack=new int[MAX_STACK_SIZE]; #{PNdINoU
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int top=-1; Nzt1JHRS
int pivot; ;bmd<1
int pivotIndex,l,r; Ml
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stack[++top]=0; o$;x[US
stack[++top]=data.length-1; 6jA Q
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while(top>0){ "[,XS`
int j=stack[top--]; -JkO[IF
int i=stack[top--]; 0}!lN{m?
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pivotIndex=(i+j)/2; T!r7RS
pivot=data[pivotIndex]; Dbd5d]]n3
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SortUtil.swap(data,pivotIndex,j); s6IuM )x
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file://partition uLht;-`{n
l=i-1; r6<}S(
r=j; ,@MPzpH
do{ %hh8\5l.:
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (6b%;2k
SortUtil.swap(data,l,r); C7:Ry)8'I
} Vy VC#AK,
while(l SortUtil.swap(data,l,r); /PlsF
SortUtil.swap(data,l,j); xR3A4m
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if((l-i)>THRESHOLD){ ;o=mL_[
stack[++top]=i; ce\-oT
stack[++top]=l-1; I_Qnq4Sk(
} I
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if((j-l)>THRESHOLD){ vhW'2<(
stack[++top]=l+1; ^W*/!q7H
stack[++top]=j; N:.bnF(
} !h~\YE)
{,ljIhc,
} 7BnP,Nd"W
file://new InsertSort().sort(data); {DR+sE
insertSort(data); b6ddXM\Z
} 9#7zjrB
/** h9mR+ng*oD
* @param data WF7RMQ51j
*/ Z^3Risi
private void insertSort(int[] data) { ?CC6/bE-{
int temp; TMrmyvv
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); '}=M~
} pOXEM1"2A
} W*2SlS7
} 9"e!0Q4 0
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} wl4yNC
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归并排序: ]Yy
Sf
P!/8
package org.rut.util.algorithm.support; uQlV zN.?
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import org.rut.util.algorithm.SortUtil; QK\z-'&n
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/** w~`P\i@
* @author treeroot ZJqmD
* @since 2006-2-2 (~~=<0S
* @version 1.0 //(c 1/s
*/ .6*A~%-=[d
public class MergeSort implements SortUtil.Sort{ v3B
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/* (non-Javadoc) 9b0Z
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) NZ#z{JI=+
*/ e)M1$
public void sort(int[] data) { MD,-<X)Qy
int[] temp=new int[data.length]; `^/Q"zH
mergeSort(data,temp,0,data.length-1); sYL+;(#t
} =J,:j[D(
z'm;H{xf
private void mergeSort(int[] data,int[] temp,int l,int r){ 5BZ5Gl3
int mid=(l+r)/2; d@<XR~);
if(l==r) return ; '"&?u8u)
mergeSort(data,temp,l,mid); A8?>V%b[Y
mergeSort(data,temp,mid+1,r); [":x
for(int i=l;i<=r;i++){ 3f3?%9
temp=data; Y 4U $?%j
} .*Z]0~ &|
int i1=l; .IqS}Rh
int i2=mid+1; nsPM`dz/
for(int cur=l;cur<=r;cur++){ {_Y\Y
if(i1==mid+1) \,WPFV
data[cur]=temp[i2++]; cG<?AR?wDT
else if(i2>r) GZ1>]HB>r^
data[cur]=temp[i1++]; ^%nAx| 4xQ
else if(temp[i1] data[cur]=temp[i1++]; IpWl;i`__
else q#Bdq8
data[cur]=temp[i2++]; W<2-Q,>Y
} fu`oDi
} QxK%ZaFZA
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} SF6n06UZu
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改进后的归并排序: |qBo*OcO
'&`Zy pq
package org.rut.util.algorithm.support; K
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import org.rut.util.algorithm.SortUtil; uJ[dO}
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/** :KQ<rLd
* @author treeroot uwbj`lpf
* @since 2006-2-2 oyUf/Sl
* @version 1.0 6|zA,-=
*/ qU"+0t4
public class ImprovedMergeSort implements SortUtil.Sort { d-Sm<XHu.
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private static final int THRESHOLD = 10; c9Cp!.#*E
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@2JS/!
/* 51~:t[N|
* (non-Javadoc) @~"0|,6VC
* /as1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) d+_qBp
*/ yJ^}uw
public void sort(int[] data) { }{[F+|\>,e
int[] temp=new int[data.length]; P%1s6fjU
mergeSort(data,temp,0,data.length-1); xHf
l>C'
} noacnQ_I$
L"IdD5`7T
private void mergeSort(int[] data, int[] temp, int l, int r) { rn(T
Z}
int i, j, k; E]68IuP@'
int mid = (l + r) / 2; s>kzt1,x
if (l == r) \=.iM?T
return; !nTq"d%(W
if ((mid - l) >= THRESHOLD) W<~(ieu:K~
mergeSort(data, temp, l, mid); 6`4=!ZfI
else j}y"
insertSort(data, l, mid - l + 1); V< J~:b1V
if ((r - mid) > THRESHOLD) k}/0B
mergeSort(data, temp, mid + 1, r); ,ujoGSx}
else lOVsp#
insertSort(data, mid + 1, r - mid); %zWtPxAf
rwU[dqBRhc
for (i = l; i <= mid; i++) { =!Ok079{[
temp = data; U5" C"+
3
} /
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for (j = 1; j <= r - mid; j++) { =|H/[",gg
temp[r - j + 1] = data[j + mid]; $} ~:x_[
} eOS#@6U=u
int a = temp[l]; N/Z<v* i"
int b = temp[r]; mp}ZHuf G
for (i = l, j = r, k = l; k <= r; k++) { !.9NJ2'8
if (a < b) { u{HB5QqK
data[k] = temp[i++]; daaurT
a = temp; O4 [[9
} else { *vht</?J
data[k] = temp[j--]; Ur_~yX]Mo
b = temp[j]; m+CvU?)gJ
} [N{Rd[{QTL
} z55P~p
} H1+G:TM
sq*sb dE
/** kFeuKSa^d
* @param data hMdsR,Iq
* @param l OD{Rh(Id
* @param i h" j{B
*/ 1SQ&mH/
private void insertSort(int[] data, int start, int len) { U)N;=gr\
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rNdap*.
} B+,Z 3*
} 41$7P[M;
} [9X1;bO#f
} mim]nRd2v
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堆排序: gwNv;g
eQA89 :j,
package org.rut.util.algorithm.support; xCGvLvFn
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import org.rut.util.algorithm.SortUtil; f ~9ADb
@va6,^)
/** 7|*|xLrVY
* @author treeroot ]^R;3kU4Q
* @since 2006-2-2 Jgb{Tl:r
* @version 1.0 '\P6NszY~
*/ VDBP]LRF
public class HeapSort implements SortUtil.Sort{ *joM[ML` 6
iN<Tn8-YH6
/* (non-Javadoc) a>6!?:Rj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *SLv$A
*/ 5s`NR<|2L
public void sort(int[] data) { @32JMS<
MaxHeap h=new MaxHeap(); yPKeatH]
h.init(data); g?)9zJ9
for(int i=0;i h.remove(); >tYptRP
System.arraycopy(h.queue,1,data,0,data.length); YEQ}<\B\&
} [
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y1B3F5
private static class MaxHeap{ J1hc :I<;
*o`bBdZ
void init(int[] data){ Jk 0;<2j
this.queue=new int[data.length+1]; ^I@43Jy/
for(int i=0;i queue[++size]=data; [{L4~(uU8
fixUp(size); %3|0_
} !Hxx6/
} P'R!"
#
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private int size=0; ?FxxH*>"
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private int[] queue; (ybKACx
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public int get() {
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return queue[1]; ?=$a6o
} ,_D`0B6o
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public void remove() { <T,vIXwu+
SortUtil.swap(queue,1,size--); kO+Y5z6=
fixDown(1); 8 W79
} zvL;.U
file://fixdown ]`b/_LJN$F
private void fixDown(int k) { M1-n
int j; Y7{IF X
while ((j = k << 1) <= size) { K]1A,Q
if (j < size %26amp;%26amp; queue[j] j++; mY+Jju1
if (queue[k]>queue[j]) file://不用交换 km|;T!
break; ] K3^0S/
SortUtil.swap(queue,j,k); /q0[T{Wz$
k = j; M|w;7P}
} ]%!:'#
} M| :wC
private void fixUp(int k) { _Y?p =;
while (k > 1) { KC[ql}JP
int j = k >> 1; qk<(iVUO
if (queue[j]>queue[k]) kFg@|#0v9
break; gG!L#J?
SortUtil.swap(queue,j,k); c_"]AhV~Mg
k = j; 9LI#&\lba
} |7LhE+E
} .Ks%ar
L'iENZI$
} @G@,)`p4?
J^m#984
} G~5EAeG
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SortUtil: .B_LQ;0:
jdqVS @SD
package org.rut.util.algorithm; UzTFT:\
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}
import org.rut.util.algorithm.support.BubbleSort; {OtD+%
import org.rut.util.algorithm.support.HeapSort; ?Z9C}t]
import org.rut.util.algorithm.support.ImprovedMergeSort; _bRd2k,
import org.rut.util.algorithm.support.ImprovedQuickSort; DO`
K_B
import org.rut.util.algorithm.support.InsertSort; ^K.
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import org.rut.util.algorithm.support.MergeSort; XHKiz2Pc1
import org.rut.util.algorithm.support.QuickSort; j")#"& m
import org.rut.util.algorithm.support.SelectionSort; I]+xerVd
import org.rut.util.algorithm.support.ShellSort; Wn6~x2 LaV
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/** 6O"?wN%$
* @author treeroot |Ii[WfFA|J
* @since 2006-2-2 Aru=f~!
* @version 1.0 FOV%\=Hl
*/ C-O~Oi l
public class SortUtil { <#/r.}.x
public final static int INSERT = 1; (&t741DN|
public final static int BUBBLE = 2; #;~`+[y?\
public final static int SELECTION = 3; ?-C=_eZJ
public final static int SHELL = 4; g?&_5)&
public final static int QUICK = 5; 1?%Q"*Y&
public final static int IMPROVED_QUICK = 6; ;n]GHqzY_
public final static int MERGE = 7; 5-qk"@E W
public final static int IMPROVED_MERGE = 8; v<CZ.-r\j
public final static int HEAP = 9; Zq1ZrwPF
B?n
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public static void sort(int[] data) { {| ~
sort(data, IMPROVED_QUICK); Kcf1$`F24
} J< Ljg<t+
private static String[] name={ *9Ta0e*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" IC"lsNq52
}; r:;nv D
2MY-9(no
private static Sort[] impl=new Sort[]{ F/O5Z?C?
new InsertSort(), &BTgISYi
new BubbleSort(), i82sMN1jl7
new SelectionSort(), 9BR/zQ2
new ShellSort(), R. :~e
new QuickSort(), $.HZz
new ImprovedQuickSort(), ,'!x9 `
new MergeSort(), Rn?Yz^
1q
new ImprovedMergeSort(), 3lr9nBR
new HeapSort() u*}[fQ`aF
}; ]6s7?07m4
8.JFQ/)i
public static String toString(int algorithm){ $[(amj-;l
return name[algorithm-1]; 'C[{cr.`
} eV(nexE
[u*-~(
public static void sort(int[] data, int algorithm) { 0ndk=V
impl[algorithm-1].sort(data); Hreu3N
} Yx#?lA2gx
im,H|u_f4
public static interface Sort { n$Nb,/o
public void sort(int[] data); 9d kuvk}:
} <e&88{jJ
''D\E6c\
public static void swap(int[] data, int i, int j) { yBKEw(1
int temp = data; s|HpN
data = data[j]; lB)%s~P:s
data[j] = temp; +9 gI^Gt
} =bKz$
_W
} XS#Jy
n