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。 <cl$?].RE!
插入排序: !Zs;m`j&9
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package org.rut.util.algorithm.support; \O^=
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import org.rut.util.algorithm.SortUtil; o77HRX
/** '-
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* @author treeroot 9J>DLvl;
* @since 2006-2-2 +oyc9PoXF
* @version 1.0 &AoWT:Ea
*/ TzIgEn~
public class InsertSort implements SortUtil.Sort{ x.d9mjLN8m
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/* (non-Javadoc) p1 o?^A&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wo?C7,-x
*/ i4- >XvC
public void sort(int[] data) { au GN~"n^
int temp; E[$['0
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); @
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} T*$uc,
} %D&FnTa
} /]YK:7*98
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} jSddjs
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冒泡排序: $+?6U
7}nOF{RH]
package org.rut.util.algorithm.support; /A_
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import org.rut.util.algorithm.SortUtil; )of_"gZ$3A
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/** ,x_g|J _Y
* @author treeroot <q_H 3|
* @since 2006-2-2 (=p}b:Z
* @version 1.0 *yt/
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*/ `RjcJ?r
public class BubbleSort implements SortUtil.Sort{ H-I*;
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/* (non-Javadoc) [V1gj9t=,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {(t (}-:Z
*/ f(9w FT
public void sort(int[] data) { &*0!${B
int temp; of(Nq@
for(int i=0;i for(int j=data.length-1;j>i;j--){ Ir]b.6B
if(data[j] SortUtil.swap(data,j,j-1); Y \j &84
} /0(4wZe~?
} XbHcd8N T
} Bw{W-&$o
} &qo'ge8p
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} o]jo R3
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选择排序: :pNZQX
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package org.rut.util.algorithm.support; Q>X ;7nt0
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import org.rut.util.algorithm.SortUtil; 8_KXli}7=
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/** 5|AZ/!rb
* @author treeroot /AWHG._
* @since 2006-2-2 2y,~i;;_
* @version 1.0 89WuxCFS
*/ jkfI,T
public class SelectionSort implements SortUtil.Sort { 2wu
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/* B:9Z;g@&
* (non-Javadoc) &npf
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* CNP?i(Rk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q.MM|;_u`
*/ !CEF@J
public void sort(int[] data) { xv1$,|^ts
int temp; $'e.bh
for (int i = 0; i < data.length; i++) { QO|ODW+D
int lowIndex = i; -'ZP_$sA
for (int j = data.length - 1; j > i; j--) { |QHWX^pO
if (data[j] < data[lowIndex]) { Q,jlKgB5:
lowIndex = j; w $2-t
} \2~.r/`1
} sz}Nal$AC
SortUtil.swap(data,i,lowIndex); DNL
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} _&yQW&vH#
} 4N*^%
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} HLk/C[`u,
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Shell排序: g|2D(J
Xst&QKU
package org.rut.util.algorithm.support; .%D] z{''
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import org.rut.util.algorithm.SortUtil; _Hkc<j/e~
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/** @Wdnc/o]
* @author treeroot bv|v9_i
* @since 2006-2-2 `GH6$\:
* @version 1.0 ULsz<Hj
*/ c L84}1QD
public class ShellSort implements SortUtil.Sort{ f *)t<1f
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/* (non-Javadoc) FUMAvVQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6`EyzB%.$
*/ [rGR1>U?i
public void sort(int[] data) { [D/q%
for(int i=data.length/2;i>2;i/=2){ Z73 ysn}
for(int j=0;j insertSort(data,j,i); oq;}q
} <f:b%Pm7
} 8B\,*JGY2
insertSort(data,0,1); $k}+,tHtJO
} +>/Q+nh
en#W<"_"
/** X~W5Z(w(O
* @param data A7ck-9dT/L
* @param j #bf^Pq'8
* @param i 1eKJ46W
*/ V
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private void insertSort(int[] data, int start, int inc) { 5MiWM2"X\
int temp; ?ILNp`k
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); >Utn[']~
} e3',? 5j
} "BEU%,w
} C%G-Ye|@
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} P]INYH
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快速排序: Qg1LT8
2R.YHj
package org.rut.util.algorithm.support; 4|x5-m+T
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import org.rut.util.algorithm.SortUtil; hLO nX<%a
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/** jj.)$|`
* @author treeroot d0|Q1R+3
* @since 2006-2-2 4}96|2L5
* @version 1.0 x+%lNR
*/ ,ad~6.Z_)
public class QuickSort implements SortUtil.Sort{ >uxak2nM-
vzy/Rq
/* (non-Javadoc) IHf
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -3haLdRk6
*/ 0]NjsOU=
public void sort(int[] data) { EYMwg_
quickSort(data,0,data.length-1); A qE,zW
} +U@P+;
private void quickSort(int[] data,int i,int j){ i Ri1E;
int pivotIndex=(i+j)/2; m;8_A|$A
file://swap R"K{@8b
SortUtil.swap(data,pivotIndex,j); W~R_-
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int k=partition(data,i-1,j,data[j]); lD\lFN(:
SortUtil.swap(data,k,j); #& Rx(
if((k-i)>1) quickSort(data,i,k-1); rHN>fySn7
if((j-k)>1) quickSort(data,k+1,j); %`%1W
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} D[yaAG<
/** W9.ZhpM
* @param data kU4Zij-O
* @param i ;Mw9}Reh@
* @param j -O. MfI+
* @return pHKj*Y
*/ )Z"7^i
private int partition(int[] data, int l, int r,int pivot) { k'
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do{ (#7pGGp*E
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); nn5S 7!
SortUtil.swap(data,l,r); rcNM,!dZ
} ^ !E;+o' t
while(l SortUtil.swap(data,l,r); :P;#Y7}Y$
return l; 21G]d
} +qjW;]yxP
nM\Wa
} Q8T4_p[-o
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改进后的快速排序: a]$KI$)e
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package org.rut.util.algorithm.support; o y}(
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import org.rut.util.algorithm.SortUtil; x&8fmUS:@;
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/** UV@<55)K
* @author treeroot ?RrJYj1
* @since 2006-2-2 ?9 2+(s
* @version 1.0 Y~gpi L3u
*/ K\=bpc"Fy
public class ImprovedQuickSort implements SortUtil.Sort { bbS'ZkB\
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private static int MAX_STACK_SIZE=4096; LlnIn{C
private static int THRESHOLD=10; i8u9~F
/* (non-Javadoc) G8f7N;D
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rTW1'@E
*/ [ZDJs`h!`
public void sort(int[] data) { bAt!9uFn
int[] stack=new int[MAX_STACK_SIZE]; u;1#eP\;
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int top=-1; d<fS52~l
int pivot; hW
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int pivotIndex,l,r; +1F@vag7
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stack[++top]=0; oa1&9
stack[++top]=data.length-1; l&U3jeW-o
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while(top>0){ [uZU p*.V
int j=stack[top--]; />.&
int i=stack[top--]; 7u o4F=%
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pivotIndex=(i+j)/2; f}nGWV%,
pivot=data[pivotIndex]; (;C_>EL&u
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SortUtil.swap(data,pivotIndex,j); .#rI9op
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file://partition z}OY'}sk8
l=i-1; &!KJrQ
r=j; # |w,^tV
do{
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while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); H*; J9{
SortUtil.swap(data,l,r); - stSl*
} ur9 -F^$
while(l SortUtil.swap(data,l,r); lr,hF1r&Y
SortUtil.swap(data,l,j); {%b>/r
ra$_#HY
if((l-i)>THRESHOLD){ u\smQhQGE
stack[++top]=i; [sACPn$f
stack[++top]=l-1; {l\v J#r:
} o NJ/AT
if((j-l)>THRESHOLD){ {RwwSqJ
stack[++top]=l+1; S#2'Jw
stack[++top]=j; B>YrDJUN
} 9Ni$nZN
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} DCP"
file://new InsertSort().sort(data); (J$JIPF
insertSort(data); 3l5q?" $
} $N:m
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/** 8Bo'0
* @param data _S@s
*/ dpGaI
private void insertSort(int[] data) { Hagj^8
int temp; ?8YHz
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); c\]h YKA
} 89+m?H]K
} 9FH=Jp
} 93[`1_q7\
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} ^Q2K0'm5
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归并排序: ;)cSdA9
~A>3k2N/e
package org.rut.util.algorithm.support; {lx^57v
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import org.rut.util.algorithm.SortUtil; Lr40rLx;u
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/** 3U1xKF
* @author treeroot oA_AnD?G+
* @since 2006-2-2 |F9/7 z\5+
* @version 1.0 B@.U\.
*/ mZMLDs:
public class MergeSort implements SortUtil.Sort{ tUz!]P2BUO
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/* (non-Javadoc) f<0-'fGJd
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CZ|Y o
*/ &eK8v]|"W
public void sort(int[] data) { jO!!. w
int[] temp=new int[data.length]; y4P mL
mergeSort(data,temp,0,data.length-1); j~Rh_\>Q
} 6i{W=$RQ
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private void mergeSort(int[] data,int[] temp,int l,int r){ Ms^,]Q1{
int mid=(l+r)/2; 3u+~!yz
if(l==r) return ; {jggiMwo.v
mergeSort(data,temp,l,mid); 1=W>zC
mergeSort(data,temp,mid+1,r); c_HYB/'
for(int i=l;i<=r;i++){ oAv L?2
temp=data; cz&FOP+!
}
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int i1=l; 0Oe@0L%^3"
int i2=mid+1; Z</$~
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for(int cur=l;cur<=r;cur++){
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if(i1==mid+1) 7NoB
data[cur]=temp[i2++]; 0dXZd2oK@
else if(i2>r) xqM R[W\x
data[cur]=temp[i1++]; 'rq
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else if(temp[i1] data[cur]=temp[i1++]; oy/#,R_n%
else z4_>6sf{
data[cur]=temp[i2++]; j.AAY?L
} <7?MutHM-
} H[!by)H
m:X;dcq'3
} d&.)Dw
Y
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改进后的归并排序: T9N /;3
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package org.rut.util.algorithm.support; Y~fds#y0
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import org.rut.util.algorithm.SortUtil; ]e)<CE2
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/** ;Fp"]z!Qh+
* @author treeroot '.d el7s
* @since 2006-2-2 au0)yg*V1
* @version 1.0 Jr\4x7a;`~
*/ v=9:N/sW
public class ImprovedMergeSort implements SortUtil.Sort { ,%>/8*
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private static final int THRESHOLD = 10; FW=oP>f]w
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/* /,GDG=ra
* (non-Javadoc) 95?$O~I
* gbQrSJs!Zh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ix*n<lCoC
*/ dM#\h*:=
public void sort(int[] data) { o!\Vk~Vi&
int[] temp=new int[data.length]; ~hYG%
mergeSort(data,temp,0,data.length-1); 0j_`7<,:
} a|lcOU
^MQ7*g6o
private void mergeSort(int[] data, int[] temp, int l, int r) { 9M<qk si
int i, j, k; ]NG`MZ
int mid = (l + r) / 2; <E!M<!h
if (l == r) <|s|6C
return; *,@dt+H!y
if ((mid - l) >= THRESHOLD) ] 6M- s
mergeSort(data, temp, l, mid); kCLz@9>FQ
else XQHvs{Po
insertSort(data, l, mid - l + 1); A;q}SO%b
if ((r - mid) > THRESHOLD) |brl<*:
mergeSort(data, temp, mid + 1, r); tE=P9 \4
else 6\/C]![%
insertSort(data, mid + 1, r - mid); ZIkXy*<(
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for (i = l; i <= mid; i++) { $(.[b][S
temp = data; ZU7,=B=
} /&cb`^"U^
for (j = 1; j <= r - mid; j++) { rFdq \BSi
temp[r - j + 1] = data[j + mid]; wUW+S5"K
} \ec,=7S<Zf
int a = temp[l]; 7 45Uo'
int b = temp[r]; JX`+b
for (i = l, j = r, k = l; k <= r; k++) { DY0G;L3
if (a < b) { zF3fpEKe
data[k] = temp[i++]; |jO&qT]{
a = temp; OUS@)Tyh
} else { GC~Tf rf=r
data[k] = temp[j--]; qZG "{8
b = temp[j]; vfcj,1
} UIovv%7zZ
} YPFjAQ
} |SQ5 Sb
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/** ixE72bX
* @param data d%u|)
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* @param l \h,S1KmIBD
* @param i /\_0daUx
*/ oCXBek?\
private void insertSort(int[] data, int start, int len) { rRly0H
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wh[XJ_xY
} 11Pm lzy
} mJ)o-BV
} j%#n}H
} <p-R{}8
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堆排序: `N]!-=o
u-f_,],p
package org.rut.util.algorithm.support; al(t-3`<
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import org.rut.util.algorithm.SortUtil; Z Z\,iT
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/** -c~nmPEG6
* @author treeroot {: T'2+OH>
* @since 2006-2-2 gH(,>}{^K
* @version 1.0 K8ecSs}}J
*/ b'3w.%^
public class HeapSort implements SortUtil.Sort{ 'Oyz/P(p
E#Smi507p
/* (non-Javadoc) Z)~.OqRw]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aP>%iRk'J!
*/ )lTkqz8v
public void sort(int[] data) { Z455g/=ye
MaxHeap h=new MaxHeap(); $NWXn,Y'
h.init(data); N3!x7J7A
for(int i=0;i h.remove(); ^} %OqP
System.arraycopy(h.queue,1,data,0,data.length); >Ke4lO"
}
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private static class MaxHeap{ V{HP8f91
g0:mm,t\
void init(int[] data){ _%?}e|epy
this.queue=new int[data.length+1]; '+hiCX-_
for(int i=0;i queue[++size]=data; qfd/t<?|D
fixUp(size); Cb%?s
} oe=^CeW"
} 4. 7m*
_{_ybXG|
private int size=0; 1
`hj]@.]
/EZF5_`bT
private int[] queue; MN}@EQvW==
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public int get() { 4onRO!G,
return queue[1]; w4\b^iJz
} f R$E*Jd
{0 IEizQ|i
public void remove() { h# c.HtVE
SortUtil.swap(queue,1,size--); %AwR 4"M
fixDown(1); suC]
} _VLc1svv
file://fixdown )$p<BL U
private void fixDown(int k) { MDZ,a0?4t
int j; D1}Bn2BM$
while ((j = k << 1) <= size) { Rq-BsMX!A
if (j < size %26amp;%26amp; queue[j] j++; hX#y7m
if (queue[k]>queue[j]) file://不用交换 66NJ&ac
break; U p=J&^.
SortUtil.swap(queue,j,k); O8%+5l`T!
k = j; =;#+8w=^
} 3xj
?}o
} JL5
)
private void fixUp(int k) { C_mPw
while (k > 1) { a/A$
MXZ_
int j = k >> 1; J!b
v17H"
if (queue[j]>queue[k]) Q*u4q-DE
break; )kfj+/
SortUtil.swap(queue,j,k); NokAP|<y
k = j; zy"wQPEE
} ;m`k#J?
} uH!uSB2
JKN0:/t7Q
} klmRU@D
=~}\g;K1Q
} KSe`G;{
P1tc*2Z
SortUtil: fs_6`Xt
UIPi<_Xa
package org.rut.util.algorithm; mxt fKPb
$9k7A 8K
import org.rut.util.algorithm.support.BubbleSort; G;#-CT
import org.rut.util.algorithm.support.HeapSort; BQmHYar
import org.rut.util.algorithm.support.ImprovedMergeSort; CV&+^_j'k
import org.rut.util.algorithm.support.ImprovedQuickSort; s
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import org.rut.util.algorithm.support.InsertSort; b9b384Q1O
import org.rut.util.algorithm.support.MergeSort; gmtp/?>e
import org.rut.util.algorithm.support.QuickSort; Jn!-Wa,
import org.rut.util.algorithm.support.SelectionSort; f86h"#4
import org.rut.util.algorithm.support.ShellSort; = m]|C1x
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/** ye!}hm=w
* @author treeroot lJ1_Zs `
* @since 2006-2-2 ZZ|a`U
* @version 1.0 E:'TZ4Z
*/ /qM:;:N%j
public class SortUtil { N.R,[K
public final static int INSERT = 1; ?"-%>y@w
public final static int BUBBLE = 2; ElLDSo@WvR
public final static int SELECTION = 3; -]HPDN,OB
public final static int SHELL = 4; j:ze5F A+
public final static int QUICK = 5; s~(!m. R
public final static int IMPROVED_QUICK = 6; Hs,pY(l^
public final static int MERGE = 7; 6%?bl{pNn
public final static int IMPROVED_MERGE = 8; r1dP9MT\8
public final static int HEAP = 9; pD;'uEFBQ
AT*J '37
public static void sort(int[] data) { 7L2$(d4
sort(data, IMPROVED_QUICK); |&!04~s;E
} 0*G
=~:
private static String[] name={ 6?GR+;/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" r:.3P
}; b'F#Y9
R{={7.As+
private static Sort[] impl=new Sort[]{ 8NU <lV`
new InsertSort(), I2"F2(>8K
new BubbleSort(), ;>%@
new SelectionSort(), P|c[EUT
new ShellSort(), $d\]s]}`
new QuickSort(), ^I2+$
new ImprovedQuickSort(), mY!os91KoO
new MergeSort(), =SMI,p&
new ImprovedMergeSort(), -CePtq`
new HeapSort() .&Tcds
}; oTS/z\C"<u
zb<YYJ]
public static String toString(int algorithm){ OAx5 LTd
return name[algorithm-1]; `?@7T-v
} b/^i
oZVq}}R
public static void sort(int[] data, int algorithm) { nKxu8YAJe
impl[algorithm-1].sort(data); YKCd:^u
} :g@H=W
,gY bi-E
public static interface Sort { NHI(}Ea|]
public void sort(int[] data); Js{X33^Ju
} KYe@2 6
r5#8Vzr
public static void swap(int[] data, int i, int j) { vSyR%
j
int temp = data; YS$42J_T
data = data[j]; S:b-+w|*
data[j] = temp; ]dvNUD
} m[l[yUw#
} 8nKZ