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。 |Iq\ZX%q
插入排序: :WN*wd
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package org.rut.util.algorithm.support; @1 )][r-7
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import org.rut.util.algorithm.SortUtil; pS)/yMlVj
/** pd}af iF
* @author treeroot
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* @since 2006-2-2 N7qSbiRf<
* @version 1.0 lV<j?I~?Q
*/ '[Ch8Yf\
public class InsertSort implements SortUtil.Sort{ E.rfS$<1
ob>2SU[Y
/* (non-Javadoc) jQ?6I1o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I =yy
I
*/ z4c{W~}`
public void sort(int[] data) { nrI-F,1
int temp; QW}N,j$
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 'd=B{7k@
} &r!*Y&
} ]1n
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} mE_?E&T`|
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} S4(lC%$|
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冒泡排序: Ja#ti y
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package org.rut.util.algorithm.support; ukRbSJ5a5
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import org.rut.util.algorithm.SortUtil; HrQft1~N
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/** th(<S
* @author treeroot WMd5Y`y
* @since 2006-2-2 >`c-Fqk
* @version 1.0 |Orp:e!
*/ Q>emyij
public class BubbleSort implements SortUtil.Sort{ ibskce{H
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/* (non-Javadoc) N!:&Xz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {kgV3 [%>
*/ 2_lb+@[W
public void sort(int[] data) { ey>V^Fj
int temp; r5N.Qt8
for(int i=0;i for(int j=data.length-1;j>i;j--){ ^<O=<tN\
if(data[j] SortUtil.swap(data,j,j-1); hbv>Jjd
} Kr'5iFK7
} $&iw (BIq
} -%^KDyZ<&
} 8yV?l7
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} YYUWBnf30G
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选择排序: 8(c,b
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package org.rut.util.algorithm.support; VdV18-ea
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import org.rut.util.algorithm.SortUtil; 48 `k"Uy
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/** B'Ll\<mq@
* @author treeroot +
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* @since 2006-2-2 {\+!@?
* @version 1.0 R3SAt-IE
*/
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public class SelectionSort implements SortUtil.Sort { EpCsJ08K
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/* "eiZZSz
* (non-Javadoc) 9'|NF<
* =N%;HfUD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?tLBEoUmKT
*/ fQ[ GN}k
public void sort(int[] data) { 5&\%
int temp; Spossp`|
for (int i = 0; i < data.length; i++) { <Prz>qL$
int lowIndex = i; ,f;YJHEx8
for (int j = data.length - 1; j > i; j--) { :Ojsj_Z;;
if (data[j] < data[lowIndex]) { xG^6'<
lowIndex = j; DPE]<oM
} pO.+hy
} gE>_:s
SortUtil.swap(data,i,lowIndex); 3"Y
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}
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} xu _:
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} ?UlAwxn
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Shell排序: b]Xc5Dp{
ny:4L{)
package org.rut.util.algorithm.support; { ke}W
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import org.rut.util.algorithm.SortUtil; @3hA\3ot^
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/** "Y Z B@
* @author treeroot {>E`Zf:
* @since 2006-2-2 &cEQ6('H
* @version 1.0 wua`e <"
*/ INFbj8T
public class ShellSort implements SortUtil.Sort{ O]SjShp
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/* (non-Javadoc) !z7j.u`Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i,DnXgmz@
*/ k<098F
public void sort(int[] data) { }&Gt&Hm>K
for(int i=data.length/2;i>2;i/=2){ SW
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for(int j=0;j insertSort(data,j,i); G G]4g)O5
} k/&~8l.$
} 7n,*3;I
insertSort(data,0,1); Vnu*+
} <lj;}@qQ<
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/** *-gd k9
* @param data _%` )cOr
* @param j tw/~z2G
* @param i G{,X_MZ%
*/ tp-PE?
private void insertSort(int[] data, int start, int inc) { ~9Nn8g6
int temp; gi|j! m
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); u/5^N^@^
} b42"Y,sbB
} [/B$cH
} df=G}M(
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} y my/`%
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快速排序: M PhG:^g
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package org.rut.util.algorithm.support; %z}{jqD&:X
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import org.rut.util.algorithm.SortUtil; @pcmVsIp
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/** qHT_,\l2
* @author treeroot Q:6i
3 Nr/
* @since 2006-2-2 aXAV`%b
* @version 1.0 'rZYl Qm
*/ Cy'0O>v5
public class QuickSort implements SortUtil.Sort{ 3]=j!_yJf
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/* (non-Javadoc) 95
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7q2G/_
*/ K'6dlwn).
public void sort(int[] data) { uAd4Zz
quickSort(data,0,data.length-1); z@Klj qN
} 8J}gj7^8
private void quickSort(int[] data,int i,int j){ osS?SuQT E
int pivotIndex=(i+j)/2; JVPl\I
file://swap r &<sSE;5
SortUtil.swap(data,pivotIndex,j); W+v7OSd92
9A@/5Z:v5W
int k=partition(data,i-1,j,data[j]); 8U98`#
i
SortUtil.swap(data,k,j); jA&ZO>4
if((k-i)>1) quickSort(data,i,k-1); 3oH .1M/
if((j-k)>1) quickSort(data,k+1,j); T}%8Vlt]
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Y
} +K6j p
/** r5h+_&v,M
* @param data 5%+M:B
* @param i [8F1rZ&
* @param j D"x;/I
* @return u@V|13p<
*/ @WmEcX|
private int partition(int[] data, int l, int r,int pivot) { s4RqY*VK
do{ bi^[Eh
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); rHzwSR@}1
SortUtil.swap(data,l,r); &!|' EW
} ?<YQ
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while(l SortUtil.swap(data,l,r); z}'-gv\,
return l; F/91Es
} l[Hgh,
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} 5crd.1@^
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改进后的快速排序: #le1
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package org.rut.util.algorithm.support; L_TM]0D>7
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import org.rut.util.algorithm.SortUtil; #H0-Fwo
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/** MLbmz\8a
* @author treeroot 3}:(.K
* @since 2006-2-2 xSnkv,my<
* @version 1.0 k0@b"y*
*/ P2U^%_~
public class ImprovedQuickSort implements SortUtil.Sort { `7v"(
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private static int MAX_STACK_SIZE=4096; fi|k)
private static int THRESHOLD=10; +7<W.Zii
/* (non-Javadoc) zEHX:-f8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <'{*6f@n
*/ 6ol*$Q"z
public void sort(int[] data) { `%%/`Qpj;
int[] stack=new int[MAX_STACK_SIZE]; zSJSus
uq.!{3)8
int top=-1; J>@T'#
int pivot; Y(a0*fh
int pivotIndex,l,r; >s5i
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stack[++top]=0; 16J"QUuG
stack[++top]=data.length-1; 'AU:[eyUV
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while(top>0){ /0.m|Th'm
int j=stack[top--]; thT2U8%T
int i=stack[top--]; 8h,>f#)0c
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pivotIndex=(i+j)/2; $N; Nvp2
pivot=data[pivotIndex]; <$"
*H2@lrc
SortUtil.swap(data,pivotIndex,j); 9oe=*#Ig1m
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file://partition wFe?0u
l=i-1;
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r=j; Gr),o6}p
do{ S.4gfY
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); DlMT<ld
SortUtil.swap(data,l,r); H
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} bS1?I@
while(l SortUtil.swap(data,l,r); {5GXN! f
SortUtil.swap(data,l,j); ~AvB5
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if((l-i)>THRESHOLD){ C2X$ bX"
stack[++top]=i; HX)oN8
stack[++top]=l-1; TJ_<21a
} }0y2k7^]
if((j-l)>THRESHOLD){ |c<h&p
stack[++top]=l+1; bR\Oyd~e
stack[++top]=j; [}mx4i
} JZl"k
i9RAbt Q}
} ,8tk]W[C
file://new InsertSort().sort(data); ro%Jg
insertSort(data); _~QiQDq
} 8q}955Nl
/** V6L0\
* @param data ZC99/NWN
*/ V*Q!J{lj^#
private void insertSort(int[] data) { h /iL/Q=
int temp; Ha)Vf +W
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); v@&UTU
} |ee A>z"I
} J,W<vrKOcN
} '{ $7Dbo
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} *!m\%*y{
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归并排序: I2&R+~ktR
}!`_Bz:
package org.rut.util.algorithm.support; at
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import org.rut.util.algorithm.SortUtil; ;%ng])w=;
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/** S/2lK*F
* @author treeroot CVAX?c{
* @since 2006-2-2 N 4!18{/2
* @version 1.0 r.JM!x8
*/ p0|PVn.^h
public class MergeSort implements SortUtil.Sort{ Jv8JCu"eky
u6t%*''
/* (non-Javadoc) )w_hbU_Pb&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A!:R1tTR;S
*/ 75"&"*R/*G
public void sort(int[] data) { "XB6k0.#
int[] temp=new int[data.length]; o..iT:f;n
mergeSort(data,temp,0,data.length-1); L!c.1Rf_
} !>8/Xz~-
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private void mergeSort(int[] data,int[] temp,int l,int r){ w;wgh`ur
int mid=(l+r)/2; CZzgPId%x
if(l==r) return ; f;`7}7C
mergeSort(data,temp,l,mid); 2Kmnt(>
mergeSort(data,temp,mid+1,r); riu_^!"Z_
for(int i=l;i<=r;i++){ Xt%y>'.
temp=data; qydRmi
} U>-GM>
int i1=l; h`@z61UI
int i2=mid+1; p[8H!=`K
for(int cur=l;cur<=r;cur++){ Y(<(!TJ-
if(i1==mid+1) ]}Jb'(gMO4
data[cur]=temp[i2++]; J5zKwt
else if(i2>r) tt0 3gU`
data[cur]=temp[i1++]; {5NE jUu{j
else if(temp[i1] data[cur]=temp[i1++]; Jwtt&" c0.
else 3P|z`}Ka
data[cur]=temp[i2++]; 5L 0w!q'W
} *km!<L7Y
} q&nEodv>+
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} aJzyEb
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改进后的归并排序: 5{|tE!
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package org.rut.util.algorithm.support; ($X2SIZh
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import org.rut.util.algorithm.SortUtil; NcyE_T
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/** Fp(-&,L0fc
* @author treeroot zLSha\X
* @since 2006-2-2 VD90JU]X<
* @version 1.0 m5%E1k$=
*/ vWZ?*0^
public class ImprovedMergeSort implements SortUtil.Sort { iI$;%uY3g
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private static final int THRESHOLD = 10; \GdsQAF"
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/* [+wLy3_
* (non-Javadoc) 8=,?Bh".
* ~(-df>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;8Ts
*/ YfUo=ku
public void sort(int[] data) { XNr8,[c
int[] temp=new int[data.length]; 9`Y\`F#}q
mergeSort(data,temp,0,data.length-1); rebWXz7
} ZRP[N)Ld$
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private void mergeSort(int[] data, int[] temp, int l, int r) { ^5Ob(FvU
int i, j, k; 4vMjVbr
int mid = (l + r) / 2; /_V4gwb}|-
if (l == r) Is(ZVI
return; 'EO"0,
if ((mid - l) >= THRESHOLD) qpX`ZY^
mergeSort(data, temp, l, mid); k&pV`.Imi
else %g7B*AX]
insertSort(data, l, mid - l + 1); 3a?dNwM@
if ((r - mid) > THRESHOLD) .|/VD'xV"
mergeSort(data, temp, mid + 1, r); [u;>b?[{
else ]owcx=5q%'
insertSort(data, mid + 1, r - mid); ~kOXMLRg
2SXy)m
!
for (i = l; i <= mid; i++) { OP98 sd&T
temp = data; UW],9r/PD@
} 4v#A#5+O E
for (j = 1; j <= r - mid; j++) { =PmIrvr'[5
temp[r - j + 1] = data[j + mid]; Tilw.z
} feT.d +Fd
int a = temp[l]; . sv
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int b = temp[r]; rds0EZ4 W
for (i = l, j = r, k = l; k <= r; k++) { h9cx~/7,_)
if (a < b) { )vD|VLV
data[k] = temp[i++]; W744hq@P%
a = temp; ?Vc/mO2X
} else { *|S{%z9>
data[k] = temp[j--]; 7,2#0Z`ge
b = temp[j]; >_u5"&q
} DxzNg_E]
} "64D.c(r$
}
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<(x!P=NM-
/** nzl3<Ar
* @param data :Y[?@/m4
* @param l xX\A&9m
* @param i w!/|aZ~*
*/ x-HR [{C
private void insertSort(int[] data, int start, int len) { %!V =noo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T-.Bof(?w
} jWGX:XB
} wQrD(Dv(yA
} RO.bh#A$
} : G0^t
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堆排序: dRXdV7-!
;s w3MRJ
package org.rut.util.algorithm.support; 'ExTnv ~
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import org.rut.util.algorithm.SortUtil; B0ZLGB
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/** T#=&oy7
* @author treeroot M<3m/l%`Y
* @since 2006-2-2 r=ht:+m
* @version 1.0 cE3V0voSw1
*/ Y@'ahxF
public class HeapSort implements SortUtil.Sort{ r&O:Bt}x
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/* (non-Javadoc) 3.?B')
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E>N L/[1d
*/ v$EgVcK
public void sort(int[] data) {
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MaxHeap h=new MaxHeap(); G-G\l?R(
h.init(data); Wfj*)j
Q
for(int i=0;i h.remove(); 3R[,,WAj$
System.arraycopy(h.queue,1,data,0,data.length); (d}z>?L
} (!dwUB
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private static class MaxHeap{ c7/fQc)h4d
@^K_>s9B
void init(int[] data){ [p 8fg!|
this.queue=new int[data.length+1]; d>jRw
for(int i=0;i queue[++size]=data; T`r\yl}
fixUp(size); ZsL-vlv
} Q=.j>aM+_
} -LMO
f[v?
.6y(ox|LL
private int size=0; x#TWZ;
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private int[] queue; -%g{{'9B
o>ZlA3tv
public int get() { =f-.aq(G/
return queue[1]; #{Gojg`5O
} gTqtTd~L
N0']t Gh2
public void remove() { m|cT)-
SortUtil.swap(queue,1,size--); tC'@yX
fixDown(1); ^|h})OHV
} DX4"}w
file://fixdown #wL8=QTcNC
private void fixDown(int k) { I,YP{H 4
int j; GeCyq%dN
while ((j = k << 1) <= size) { Zmr*$,v<y
if (j < size %26amp;%26amp; queue[j] j++; gj<Y+Dv>
if (queue[k]>queue[j]) file://不用交换 t 4tXLI;'
break; pk2}]jx"
SortUtil.swap(queue,j,k); S1a}9Z|
k = j; 4XsKOv
} 2Uq4PCx!
} I\oI"\}U
private void fixUp(int k) { %.n 7+
while (k > 1) { F/zbb
int j = k >> 1; o&vODs
if (queue[j]>queue[k]) f/K:~#k
break; Z|dng6ck
SortUtil.swap(queue,j,k); 4.0JgX
k = j; B:QAG
} O)WduhlGQ
} kpt0spp
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} 7s-ZRb[)1
]U,f}T"e
} K h;jiK !
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SortUtil: .j_YVYu1&
iPoDesp
package org.rut.util.algorithm; (>gAnebN
L
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import org.rut.util.algorithm.support.BubbleSort; om'DaG`A
import org.rut.util.algorithm.support.HeapSort; +:fr(s!OE
import org.rut.util.algorithm.support.ImprovedMergeSort; ??.9`3CYo
import org.rut.util.algorithm.support.ImprovedQuickSort; C!r9+z)<
import org.rut.util.algorithm.support.InsertSort; 6Jf\}^4@k
import org.rut.util.algorithm.support.MergeSort; _&
qM^
import org.rut.util.algorithm.support.QuickSort; {=GWQn6cc
import org.rut.util.algorithm.support.SelectionSort; fb||q-E
import org.rut.util.algorithm.support.ShellSort; 6su^yt
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/** ]$gBX=
* @author treeroot @(_M\>!%M
* @since 2006-2-2 fooQqWC)
* @version 1.0 Q-LDFnOFwp
*/ .|g67PH=
public class SortUtil { A(>kp=~
public final static int INSERT = 1; ]jL`*tI\S
public final static int BUBBLE = 2; 3d0Yq
public final static int SELECTION = 3; zHsWj^m"
public final static int SHELL = 4; (1my9k5C
public final static int QUICK = 5; Q~p[jQ,4wZ
public final static int IMPROVED_QUICK = 6; ]C
me)&hX
public final static int MERGE = 7; umD[4aP~;
public final static int IMPROVED_MERGE = 8; A&~<qgBTp
public final static int HEAP = 9; E6NrBPm
>9v?p=
public static void sort(int[] data) { Pxn;]!Z#
sort(data, IMPROVED_QUICK); \x_fP;ma=_
} G~\ SI.
private static String[] name={ '/"x MpN 4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $2j?Z.yEG
}; yIdM2#`u
Ltt+BUJc
private static Sort[] impl=new Sort[]{ ^?3e?Q?
new InsertSort(), ird
q51{G
new BubbleSort(), I3ZbHb-)_,
new SelectionSort(), >^Zyls
new ShellSort(), )~X*&(7RR}
new QuickSort(), O]Mz1 ev|
new ImprovedQuickSort(), '<YVDB&-d,
new MergeSort(), _(<D*V[
new ImprovedMergeSort(), 9-9:]2~g!
new HeapSort() cNd2XQB9=
}; FGP~^Dr/
68^5X"OGF
public static String toString(int algorithm){ Dx-G0 KIG
return name[algorithm-1]; zkt+"P{az[
} m8|&z{
H' [#x2
public static void sort(int[] data, int algorithm) { +|w-1&-
impl[algorithm-1].sort(data); Z=vzF0
} jBvZ>H+w~
/}Z0\,
public static interface Sort { -
:0{
public void sort(int[] data); lTh}0t
} G
39
N8>;BHBV!
public static void swap(int[] data, int i, int j) { ktr l |
int temp = data; Hlw0ia
data = data[j]; v<`1z?dch
data[j] = temp; EQ j2:9f
} f
V|Zh
} vh~:{akR