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。 vZTX3c:,1
插入排序: f/&Dy'OV7
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package org.rut.util.algorithm.support; R4_4 FEo
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import org.rut.util.algorithm.SortUtil; iPa!pg4m
/** 8 %Lq~lk
* @author treeroot
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* @since 2006-2-2 Cl6y:21]K
* @version 1.0 1[[`
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*/ u<]-%ha$
public class InsertSort implements SortUtil.Sort{ bkceR>h%
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/* (non-Javadoc) @7"xDgA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yj `b-^$?
*/ M9_
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public void sort(int[] data) { a,#f%#J\
int temp; I$n 0aR6
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); zob^z@2
} ^a[7qX_B
} aM9^V MOb
} \%KJ+PJ
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} r'7;:
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冒泡排序: {e/12q
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package org.rut.util.algorithm.support; ]-bA{@tP.
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import org.rut.util.algorithm.SortUtil; 0 oEw1!cY
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/** (WVN*OR?
* @author treeroot "
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* @since 2006-2-2 m[LIM}Gu
* @version 1.0 rG:IS=
*/ *%:p01&+
public class BubbleSort implements SortUtil.Sort{ ZC_b`q<
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/* (non-Javadoc) Tt`|26/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x4CrWm
*/ J*-m!0 5
public void sort(int[] data) { 38L8AJqD
int temp; E&Pv:h,pV&
for(int i=0;i for(int j=data.length-1;j>i;j--){ 1/jJ;}
if(data[j] SortUtil.swap(data,j,j-1); al F*L
} GLB7h9>
} 9jDV]!N4
} +6B(LPxgP
} 6^H64jM
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} ^'lx5+-
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选择排序: UAFl+d!
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package org.rut.util.algorithm.support; R61.!ql%w
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import org.rut.util.algorithm.SortUtil; u_dTJ,m
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/** yH;=Y1([
* @author treeroot ` Xhj7%>
* @since 2006-2-2 -N<s =
* @version 1.0 ax[-907
*/ D?44:'x+-
public class SelectionSort implements SortUtil.Sort { SpdQ<]
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/* %C" wUAY
* (non-Javadoc) i~@e}=
* 5n"b$hMF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MRxzOs
*/ b] DF7 U
public void sort(int[] data) { X~*1
int temp; b6RuYwHWV0
for (int i = 0; i < data.length; i++) { F-R4S^eV
int lowIndex = i; G%Hr c
for (int j = data.length - 1; j > i; j--) { cgNK67"(
if (data[j] < data[lowIndex]) { .}&bE1
lowIndex = j; jutEb@nog
} ]OL
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} Rb
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SortUtil.swap(data,i,lowIndex); OIGu`%~js
} ry\Nm[SQ
} 8~YhT]R=
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gX
} @Hw#O33/'
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Shell排序: \L>3E#R-Q
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package org.rut.util.algorithm.support; sMlY!3{Ix
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import org.rut.util.algorithm.SortUtil;
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/** ekND>Qjj
* @author treeroot 8iaP(*J
* @since 2006-2-2 y!&6"l$K]
* @version 1.0 .aV#W@iyK
*/ .|^L\L(!
public class ShellSort implements SortUtil.Sort{ 1v)ur\>R
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/* (non-Javadoc) \2KwF}[m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &\#If:
*/ I(y:Td
public void sort(int[] data) { 4/vQ/>c2j
for(int i=data.length/2;i>2;i/=2){ C ?JcCD2
for(int j=0;j insertSort(data,j,i); FBJw (.Jr
} ZjF5*A8l
} -L%tiz`_
insertSort(data,0,1); 3qwi)nm
} w/BaaF.0
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/** :l~Wt7R
* @param data _;/onM
* @param j LI1OocY.]
* @param i i eQQ{iGJH
*/ *WdnP.'Y
private void insertSort(int[] data, int start, int inc) { C +S
int temp; FC[8kq>Hk
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); j;}!Yn
} d+[GMIxg
} i,|2F9YH
} `d]D=DtH
;}"!|
} vncLB&@7
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快速排序: CzDJbvv]
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package org.rut.util.algorithm.support; zV {_dO
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import org.rut.util.algorithm.SortUtil; t M?3oO
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/** tk=~b}8
* @author treeroot Af y\:&j
* @since 2006-2-2 'b(V8x
* @version 1.0 4UP#~
*/ FbO\ #p s
public class QuickSort implements SortUtil.Sort{ h[HFZv~{
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/* (non-Javadoc) q$IgkL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Jd#g"a>zZ
*/ "g}m xPe
public void sort(int[] data) { x[L/d"Wf
quickSort(data,0,data.length-1); P5,X,-eG
} <g9@iUOI
private void quickSort(int[] data,int i,int j){ ]$7dkP
int pivotIndex=(i+j)/2; 'PiQ|Nnb|
file://swap bDK%vx!_
SortUtil.swap(data,pivotIndex,j); *O6q=yg;K:
{Aq2}sRl{
int k=partition(data,i-1,j,data[j]); ))Q3;mI"
SortUtil.swap(data,k,j); ~Psv[b=]
if((k-i)>1) quickSort(data,i,k-1); uRIa
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if((j-k)>1) quickSort(data,k+1,j); !<'0
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} o m9zb&{tu
/** Nr6[w|Tzd
* @param data oY Y?`<N#
* @param i * F[;D7sZ~
* @param j 3pQ^vbQ"
* @return Qmbl_#
*/ 9qe< bds1
private int partition(int[] data, int l, int r,int pivot) { JSKAlw
do{ &.D#OnRh9
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); %#gHa
SortUtil.swap(data,l,r); ?VM4_dugf
} 8":O\^i
while(l SortUtil.swap(data,l,r); _pZ2^OO@
return l; gxa@da
} 2o5Pbdel
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} (Qf"|3R4
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改进后的快速排序: -%I 0Q
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package org.rut.util.algorithm.support; U_\3preF
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import org.rut.util.algorithm.SortUtil; JY6&CL`C
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/** Cx,)$!1
* @author treeroot dJ/(u&N
* @since 2006-2-2 ik:fq&=
* @version 1.0 )TH~Tq:
*/ h
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public class ImprovedQuickSort implements SortUtil.Sort { T1Gy_ G/
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private static int MAX_STACK_SIZE=4096; fG{ 9doUD
private static int THRESHOLD=10; d]bM,`K* 6
/* (non-Javadoc) H6fR6Kr4j
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) XMJ EIG
*/ sD_"
public void sort(int[] data) { .PAR
int[] stack=new int[MAX_STACK_SIZE]; 4I %/}+Q
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int top=-1; ICbT{Mla
int pivot; ]Sl]G6#Iwv
int pivotIndex,l,r; IJnh@?BC
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stack[++top]=0; 4=b{k,kzgA
stack[++top]=data.length-1; V(/=0H/ F
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while(top>0){ P. V #
int j=stack[top--]; qjc8 $#zXS
int i=stack[top--]; qYi<GI*|@
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pivotIndex=(i+j)/2; <;T$?J9
pivot=data[pivotIndex]; -( d,AX
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SortUtil.swap(data,pivotIndex,j); ? FlV<nE"J
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file://partition zc,kHO|
l=i-1; oJ<Wh @
r=j; fD>0
do{ _mi(:s(
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); Xfq]vQ/{
SortUtil.swap(data,l,r); ?n]e5R(cj
} ,pc\
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while(l SortUtil.swap(data,l,r); BUp,bJpO
SortUtil.swap(data,l,j); @['4 X1pqt
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if((l-i)>THRESHOLD){ hhZUE]
stack[++top]=i; XyM?Dc5,
stack[++top]=l-1; +ISXyGu
} C/sDyv$
if((j-l)>THRESHOLD){ 0'{`"QD\IW
stack[++top]=l+1; e.Y*=P}D
stack[++top]=j; nV$ctdusQ
} T -'B-g
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} K% Gbl#
file://new InsertSort().sort(data); y
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insertSort(data); `6t3D&.u0
} 1|PmZPKq9n
/** #h#Bcv0 Z
* @param data x>$!R\Cj
*/ qL \*rYe<
private void insertSort(int[] data) { GA8cA)]zOD
int temp; Ul EP;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); k*;2QED
} [H3~b=
} Q I.*6-(
} ,;_D~7L
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} 0 CJ4]mYl
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归并排序: )kE(%q:*P$
rI[Lg0S
package org.rut.util.algorithm.support; ]:Q7Gys
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import org.rut.util.algorithm.SortUtil; ,0~/ Cn
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/** SwDUg}M~
* @author treeroot {mlJ E>~%
* @since 2006-2-2 i>M*ubWE4@
* @version 1.0 ? }k~>. \
*/ 7 -(LWH
public class MergeSort implements SortUtil.Sort{ YS_9M Pi
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/* (non-Javadoc) Kk^tQwj/QE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jaoGm$o>"F
*/ iZ`1Dzxgk
public void sort(int[] data) { us.+nnd
int[] temp=new int[data.length]; N1V qK
mergeSort(data,temp,0,data.length-1); Q&rf&8iH
} J)l]<##
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private void mergeSort(int[] data,int[] temp,int l,int r){ VH{SE7
int mid=(l+r)/2; y %k`
if(l==r) return ; '(/ZJ88JP
mergeSort(data,temp,l,mid); {d;eZt
`
mergeSort(data,temp,mid+1,r); .2xp.i{
for(int i=l;i<=r;i++){ SZ9xj^"g
temp=data; =f)S=0U F
} VesO/xG<
int i1=l; o3;u*f0rWn
int i2=mid+1; X-Sso9/q.
for(int cur=l;cur<=r;cur++){ EO|r
if(i1==mid+1) ))n7.pB9/
data[cur]=temp[i2++]; o(W|BD!
else if(i2>r) @" ~Mglgw
data[cur]=temp[i1++]; %qzpt{'?<
else if(temp[i1] data[cur]=temp[i1++]; u+]v.Mt
else |wf:|%
data[cur]=temp[i2++]; zS:89y<
} lPS A
} t9&z|?Vz
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} TsPO+x$l
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改进后的归并排序: M} IRagm
6'Sc=;;:
package org.rut.util.algorithm.support; Po[u6K2&
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import org.rut.util.algorithm.SortUtil; X$O,L[] 4
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/** @= c{GAj
* @author treeroot ?lxI&
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* @since 2006-2-2 eiZv|?^0
* @version 1.0 auP:r
*/ i3.8m=>
public class ImprovedMergeSort implements SortUtil.Sort { [Cz.K?+#M
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private static final int THRESHOLD = 10; KJa?TwnC
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/* 3zb;q@JV
* (non-Javadoc) y+RT[*bX5o
* VI%879Z\e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /Q"nQSG
*/ M* W=v
public void sort(int[] data) { p[e|N;W8A
int[] temp=new int[data.length]; ^zGgvFf>
mergeSort(data,temp,0,data.length-1); " 7!K'i
} |}*k|
/UjRuUC]
private void mergeSort(int[] data, int[] temp, int l, int r) { NQ<~$+{
int i, j, k; I}Z[F,}*J
int mid = (l + r) / 2; -A9 !Y{Z
if (l == r) Y#PbC
return; ,{c9Lv%@J
if ((mid - l) >= THRESHOLD) #VC^><)3
mergeSort(data, temp, l, mid); (j u-r*0
else RR:m<9l
insertSort(data, l, mid - l + 1); FTt7o'U
if ((r - mid) > THRESHOLD) DR9M8E
mergeSort(data, temp, mid + 1, r); h*hV
else 9AJ!7J#v"
insertSort(data, mid + 1, r - mid); gFJ&t^yL
-e%=Mpq.
for (i = l; i <= mid; i++) { fHf+!
temp = data; Cc]s94
} 2 c'=^0:
for (j = 1; j <= r - mid; j++) { @yaBtZUp3
temp[r - j + 1] = data[j + mid]; w2~(/RgO
} o lNL|WJ`w
int a = temp[l]; `h S<F"
j
int b = temp[r]; 8N(bLGUG
for (i = l, j = r, k = l; k <= r; k++) { %_1~z[Dv
if (a < b) { /-$`GT?l
data[k] = temp[i++]; Fm-W@
a = temp; 3h";
2
} else { O6;>]/`
data[k] = temp[j--]; m7kDxs(KO
b = temp[j]; U:MkA(S%c
} <_ */
} _\"P<+!
} hzPx8sO
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/** "h7-nwm
* @param data hC]c
=$=7
* @param l jjvm<;lv
* @param i .,,?[TI
*/ 5%?La`C9[
private void insertSort(int[] data, int start, int len) { P,iLqat
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )X\.Xr-6q
} 5DyN=[b
} F4Ft~:a
} U3lr<(r*
} |i?AtOt@f
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堆排序: |gxU;"2`5~
Xk]5*C]6<
package org.rut.util.algorithm.support; .2
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import org.rut.util.algorithm.SortUtil; vG\]xM'u
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/** A
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* @author treeroot K;6K!6J:[
* @since 2006-2-2 tb/u@}")
* @version 1.0 *&UVr
*/ y%TR2CvT
public class HeapSort implements SortUtil.Sort{ Jkm\{;
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/* (non-Javadoc) 1a4QWGpq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +@%9pbM"z
*/ V.Xz
n
public void sort(int[] data) { ~JLqx/[|s
MaxHeap h=new MaxHeap(); cw"x0 RS
h.init(data); _gC<%6#V`r
for(int i=0;i h.remove(); EemKYcE@Nr
System.arraycopy(h.queue,1,data,0,data.length); D{'Na5(
} T,7Y7MzF
lu(G3T8
private static class MaxHeap{ (P`{0^O"}
8ZG'?A+{
void init(int[] data){ #4na>G|
this.queue=new int[data.length+1]; TWx<)
for(int i=0;i queue[++size]=data; YXIDqTA+
fixUp(size); ^ ?tAt3dMI
} mkE*.I0=
} IH~H6US
2z0HB+Y}x
private int size=0; (m04Z2#
mZ/B:)_
private int[] queue; 1LPfn(
'b661,+d
public int get() { }lpcbm
return queue[1]; niy@'
} 4#2iL+
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public void remove() { ~iwEhF
SortUtil.swap(queue,1,size--); AF3t#)q
fixDown(1); M8cLh!!
} _"0n.JQg
file://fixdown y\0^c5}
private void fixDown(int k) { t_]UseP$RF
int j; CdaB.xk
while ((j = k << 1) <= size) { >D:S)"
if (j < size %26amp;%26amp; queue[j] j++;
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if (queue[k]>queue[j]) file://不用交换 XIjSwR kYJ
break; G~B
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SortUtil.swap(queue,j,k); >P0AGZ
k = j; ]NFDE-Jz]
}
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} !%s7I^f*
private void fixUp(int k) { 6J|f^W-fs
while (k > 1) { mu{%%b7|^
int j = k >> 1; X2@o"xU
if (queue[j]>queue[k]) $}KYpSV
break; @{CpC
SortUtil.swap(queue,j,k); :>3&"T.
k = j; c(Ha"tBJ
} &PgdCijGq;
} v$tS2N2
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} 4tuEC-oh
\~?s= LT
} E?9_i
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SortUtil: 8OFrW.>[
ZcWl{e4
package org.rut.util.algorithm; Y}?@Pm drz
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import org.rut.util.algorithm.support.BubbleSort; rk. UW
import org.rut.util.algorithm.support.HeapSort; \FKIEg+(2
import org.rut.util.algorithm.support.ImprovedMergeSort; 6op\g].P
import org.rut.util.algorithm.support.ImprovedQuickSort; RDqC$Gu
import org.rut.util.algorithm.support.InsertSort; @H_LPn
import org.rut.util.algorithm.support.MergeSort; zcZw}
import org.rut.util.algorithm.support.QuickSort; sQ)4kF&,
import org.rut.util.algorithm.support.SelectionSort; F`-[h)e.
import org.rut.util.algorithm.support.ShellSort; kcOpO<oE
@B^'W'&C
/** ]yIy~V
* @author treeroot {a_L
/"7
* @since 2006-2-2 ):|)/ZiC'
* @version 1.0 ?Jr<gn^D
*/ =[jBOx&
public class SortUtil { 7J;.T%4l
public final static int INSERT = 1; =f|>7m.p
public final static int BUBBLE = 2; hy]AH)?pR
public final static int SELECTION = 3; fZ376Z:S$
public final static int SHELL = 4; KJ#c(yb9zR
public final static int QUICK = 5; d:wAI|
public final static int IMPROVED_QUICK = 6; 2 sOc]L:9
public final static int MERGE = 7; 4dok/ +Ec
public final static int IMPROVED_MERGE = 8; Qdn:4yk
public final static int HEAP = 9; -qEr-[z
W
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public static void sort(int[] data) { NkJ^ecn%)
sort(data, IMPROVED_QUICK); \c\=S
} ueg X
private static String[] name={ iB,*X[}EqG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" U^YPL,m1
}; 8)tyn'~i
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private static Sort[] impl=new Sort[]{ 7,4x7!
new InsertSort(), Rd$<R
new BubbleSort(), <'B^z0I,
new SelectionSort(), c"$_V[m
new ShellSort(), -)Vj08aP
new QuickSort(), [<`+9R
new ImprovedQuickSort(), Aa Ma9hvT!
new MergeSort(), 0x &^{P~
new ImprovedMergeSort(), 'oEmbk8Hg
new HeapSort() $+);!?^|:
}; >@%!r
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public static String toString(int algorithm){ l^"G \ZVI
return name[algorithm-1]; GGuLxc?(
} 3TtW2h>M
h
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public static void sort(int[] data, int algorithm) { #.='dSj
impl[algorithm-1].sort(data); gi6_la+
} K%k,-
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public static interface Sort { gf=*m"5
public void sort(int[] data); Pn#Lymxh_a
} pZjFpd|
[~o3S$C&7
public static void swap(int[] data, int i, int j) { -+=8&Wa
int temp = data; Ygl!fC
4b
data = data[j]; '8JaD6W9S
data[j] = temp; 'YeJGzsJp
} OG+ $F
} b2Hpuej