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。 7uA\&/
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插入排序: rBD2Si=
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package org.rut.util.algorithm.support; 500>
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import org.rut.util.algorithm.SortUtil; Av[Ud
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/** X=#It&m%s
* @author treeroot 2@5A&b
* @since 2006-2-2 ywe5tU
* @version 1.0 w?/f Z x
*/ 64b<0;~
public class InsertSort implements SortUtil.Sort{ mCG;[4gM
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/* (non-Javadoc) )?9\$^I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U>1b9G"_
*/ VX&WlG`wa
public void sort(int[] data) { l"?]BC~
int temp; pNSst_!>
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); L3g9b53\
} V:QdQ;c
} ?AT(S
} A_]D~HH
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} TL]bY'%
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冒泡排序: YjL
t&D:IZ
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package org.rut.util.algorithm.support; [Q=4P*G}X
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import org.rut.util.algorithm.SortUtil; z2ds8-z
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/** 2\,e
* @author treeroot CY5w$E
* @since 2006-2-2 oM2|]ew)
* @version 1.0 *n;>p_#
*/ ` )]lUvR
public class BubbleSort implements SortUtil.Sort{ Slo9#26
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/* (non-Javadoc) p ^](3Vi(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) R^|!^[WE
*/ 8Y7 @D$=w
public void sort(int[] data) { srhFEmgN7)
int temp; -S7RRh'p
for(int i=0;i for(int j=data.length-1;j>i;j--){ ` -yhl3si
if(data[j] SortUtil.swap(data,j,j-1); cJ2y)`
} %5`r-F
} +fkP+RVY
} QT7_x`#J~o
} \y@ eBW
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} Pb3EnNqYbM
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选择排序: |E?
,xWN
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package org.rut.util.algorithm.support; J/L)3y
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import org.rut.util.algorithm.SortUtil; g&q^.7c}
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/** yg`E22
* @author treeroot /%-o.hT
* @since 2006-2-2 X1O65DMr`g
* @version 1.0 f>p; siR)
*/ /#@LRN<oCq
public class SelectionSort implements SortUtil.Sort { o}d2N/T
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/* QXsfp
* (non-Javadoc) +BU0 6lLD
* ysL0hwir
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) j-j'ph K
*/ ,!jR:nApE
public void sort(int[] data) { <` #,AVH
int temp; f(^33k
for (int i = 0; i < data.length; i++) { ^NY+wR5Sn
int lowIndex = i; <\+Po<)3j
for (int j = data.length - 1; j > i; j--) { fmtuFr^a1
if (data[j] < data[lowIndex]) { bGhhh/n
lowIndex = j; 3Gj(z:)b
} /7.wQeL9
} tP&{ J^G
SortUtil.swap(data,i,lowIndex); 7 FEzak'
} gQu\[e%mVo
} eB)UXOu1
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} )hePN4edj
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Shell排序: 5%EaX?0h+
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package org.rut.util.algorithm.support; >3<&V{<K
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import org.rut.util.algorithm.SortUtil; WW)_Wh
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/** qxRT1B]{Wx
* @author treeroot D7%^Ly
* @since 2006-2-2 muW`pm
* @version 1.0 Bi'I18<
*/ ,oC={^l{
public class ShellSort implements SortUtil.Sort{ 5hlJbWJa
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/* (non-Javadoc) ?aP1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q]2}UuM|U
*/ Sr4dY`V*:z
public void sort(int[] data) { UDhwnGTq(l
for(int i=data.length/2;i>2;i/=2){ _HSTiJVr
for(int j=0;j insertSort(data,j,i); 8 h55$j
} mMel,iK=
} /%2:+w
insertSort(data,0,1); \Sz4Gr0g3Z
} \Mobq
---Ks0\V
/** BnY\FQ)K
* @param data V5hp
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* @param j ?FkQe~FN{
* @param i N:m@D][/sW
*/ JrY"J]/
private void insertSort(int[] data, int start, int inc) { 9{auleu
R
int temp; R^n*
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for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 8#[%?}tK
} ~nLkn#Z
} T2c_vY
} .Y=Z!Q
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} pZni,<Q
SQz$kIZR
快速排序: g?k#wj1uH
WM~J,`]J
package org.rut.util.algorithm.support; }TXp<E"\
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import org.rut.util.algorithm.SortUtil; u *#-7
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/** A>rW Go.{E
* @author treeroot EZgxSQaPH
* @since 2006-2-2 Pf^Ly97
* @version 1.0 O=4ceEmz
*/ TWl(\<&+)
public class QuickSort implements SortUtil.Sort{ ]%vGC^
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/* (non-Javadoc) Z<$E.##
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8`R +y
*/ D}k-2RM2k
public void sort(int[] data) { r7]?g~zb
quickSort(data,0,data.length-1); iA1;k*)q
} W(]E04
private void quickSort(int[] data,int i,int j){ Mp DdJ,
int pivotIndex=(i+j)/2; < e7<t9
file://swap "(HA9:
SortUtil.swap(data,pivotIndex,j); |wyJh"4!
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int k=partition(data,i-1,j,data[j]); Ppi- skT
SortUtil.swap(data,k,j); q9g[+*9]$
if((k-i)>1) quickSort(data,i,k-1); V'f&JQA
if((j-k)>1) quickSort(data,k+1,j); rU2YMghE
R
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} [~Z'xY
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/** Lk8W&|;0|
* @param data v"G%5pq*\
* @param i E)rOlh7
* @param j O,V6hU/ *
* @return x):k#cu[L
*/ 76u/WC>B
private int partition(int[] data, int l, int r,int pivot) { Bsih<`KF^
do{ Mo?t[]L
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); D-2v>l_
SortUtil.swap(data,l,r); Bp=oTCG
} priT7!
while(l SortUtil.swap(data,l,r); <?=mLOo=
return l; n'0$>Q
} 5pKvNLy.t
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} kL2Zr
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改进后的快速排序: `lV
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package org.rut.util.algorithm.support; ~T p8>bmSR
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import org.rut.util.algorithm.SortUtil; c],frhmyd
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/** b[&,%Sm+6
* @author treeroot yjM@/b
* @since 2006-2-2 vS24;:f
* @version 1.0 cA (e"N
*/ +|}K5q \
public class ImprovedQuickSort implements SortUtil.Sort { P(YG@
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private static int MAX_STACK_SIZE=4096; ftI+#0?[!
private static int THRESHOLD=10; 0F0Q=dZ
/* (non-Javadoc) t}c}@i_c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;ow~vO,x
*/ n.)[MC}
public void sort(int[] data) { Fv7%TK{oe
int[] stack=new int[MAX_STACK_SIZE]; ou,=MpXx*
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int top=-1; #pm-nU%|_j
int pivot; *?R\[59
int pivotIndex,l,r; !=h|&Vta
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stack[++top]=0; 057G;u/
stack[++top]=data.length-1; /i~^LITH
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while(top>0){ SJ WP8+
int j=stack[top--]; M~{P',l*
int i=stack[top--]; s2kZZP8-
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pivotIndex=(i+j)/2; #()cG
pivot=data[pivotIndex]; k1$2a8ja
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SortUtil.swap(data,pivotIndex,j); 2dd:5L,
G=bP<XF
file://partition 8HRPJSO~g
l=i-1; pJ*#aH[ySP
r=j; Mn }Z9S[
do{ ("JV:u.L+
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); uZiY<(X
SortUtil.swap(data,l,r); gt t$O
} w#G=Z_Tt
while(l SortUtil.swap(data,l,r); j~L1~@
SortUtil.swap(data,l,j); %[\Ft
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if((l-i)>THRESHOLD){ c]>&6-;rf
stack[++top]=i; &6^W%r
stack[++top]=l-1; PVkN3J
} u0oYb_Yv
if((j-l)>THRESHOLD){ 6nWx>R<
stack[++top]=l+1; :rs\ydDUF
stack[++top]=j; /4B4IT
} N7I71q|
1={Tcq\]
} )Y,?r[4{
file://new InsertSort().sort(data); {EoyMJgz
insertSort(data); noUZ9M|hz
} cVHE}0Xd(
/** %}ApO{
* @param data YT(1
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*/ 9X{nJ"
private void insertSort(int[] data) { % 6hw
int temp; Y7t{4P
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); hte9l)
} T;[c<gc/
} , w'$T)
} ~h^}W$pO
if!`Qid
} ~j&:)a'^
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归并排序: 7+!7]'V
Y\z\{JW
package org.rut.util.algorithm.support; cV_IG}LJ
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import org.rut.util.algorithm.SortUtil; 5f*'wA
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/** lQ<n
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* @author treeroot zI:5I @ X
* @since 2006-2-2 F3 l^^Mc
* @version 1.0 dbUZGn~
*/ |^k1hX2?W
public class MergeSort implements SortUtil.Sort{ nC!^,c
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/* (non-Javadoc) @ Rb1)$~#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TX
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*/ ^YJ^+:D(
public void sort(int[] data) { -b>O4_N
int[] temp=new int[data.length]; n`T[eb~
mergeSort(data,temp,0,data.length-1); %FWfiFV|<
} (F
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private void mergeSort(int[] data,int[] temp,int l,int r){ )>M@hIV5>
int mid=(l+r)/2; '-]BSU
if(l==r) return ; qddT9U|8~
mergeSort(data,temp,l,mid); %V1T!<
mergeSort(data,temp,mid+1,r); ~W *j^+T"
for(int i=l;i<=r;i++){ &aAo:pj
temp=data; -%V-'X5
} I.0P7eA-
int i1=l; ;$L!`"jn
int i2=mid+1; >\.[}th}
for(int cur=l;cur<=r;cur++){ jKV?!~/F
if(i1==mid+1) U6'haPlOk%
data[cur]=temp[i2++]; PM<LR?PLc
else if(i2>r) U4L=3T+:[
data[cur]=temp[i1++]; sAN:C{
else if(temp[i1] data[cur]=temp[i1++]; v?TJ!o
else G1^!e j
data[cur]=temp[i2++]; %PdYv _5
} MVv^KezD
} /^eemx
8Pdnw/W
} rHBjR_L.2
VrE5^\k<a
改进后的归并排序: 1LIV/l^}f
ftH%, /,
package org.rut.util.algorithm.support; v_h*:c
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import org.rut.util.algorithm.SortUtil; Eg29|)qsz
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/** wVJFA1
* @author treeroot Ml/p{ *p
* @since 2006-2-2 J+NK+,_*M
* @version 1.0 Ry S{@=si
*/ \Y[)bo6s
public class ImprovedMergeSort implements SortUtil.Sort { (4f9wrK
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private static final int THRESHOLD = 10; MVd
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/* pvU oed\
* (non-Javadoc) :Sn3|`HDm
* 2\tjeg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) htrj3$q(4
*/ 6SO7iFS
public void sort(int[] data) { 6%INNIyAWa
int[] temp=new int[data.length]; +*{5ORq=
mergeSort(data,temp,0,data.length-1); Od]xIk+E
} \` ^Tbn:
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private void mergeSort(int[] data, int[] temp, int l, int r) { V"jnrNs3
int i, j, k; s'Q^1oQM2h
int mid = (l + r) / 2; l'%R^
if (l == r) z ;Nk& <?
return; R./ 6Q1
if ((mid - l) >= THRESHOLD) {1DYXKe
mergeSort(data, temp, l, mid); jF_I4H
else c+/C7C o
insertSort(data, l, mid - l + 1); &E`Z_}~
if ((r - mid) > THRESHOLD) "$pgmf2
mergeSort(data, temp, mid + 1, r); U?j> 28
else PSR`8z n
insertSort(data, mid + 1, r - mid); Y(Ezw !a
(b}7Yb]#c
for (i = l; i <= mid; i++) { H^:|`T|,
temp = data; T5_Cu9>ax
} RAbq_^Q
for (j = 1; j <= r - mid; j++) { %<|KJb4?
temp[r - j + 1] = data[j + mid]; m e{SVG{
} HWOH8q{f!
int a = temp[l]; K61os&K
int b = temp[r]; " z'!il#
for (i = l, j = r, k = l; k <= r; k++) { BQ0\+
if (a < b) { R>&/n/l
data[k] = temp[i++]; M
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a = temp; J4 #]8!A
} else { xumv I{
data[k] = temp[j--];
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b = temp[j]; 8mLU ~P
|
} 4PM`hc
} `3oP^#
} :?k=Yr
mJR
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/** @\}36y
* @param data M)^9e?
* @param l q:sR zX
* @param i Vp{2Z9]}
*/ "<a|Q ,!
private void insertSort(int[] data, int start, int len) { Yb{t!KL
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &ru0i@?)
} Rj`Y X0?+
} S`w)b'B!M
} !PIdw~YC
} <j3HT"^[D
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堆排序: *S_Iza #&x
y<d#sv(s
package org.rut.util.algorithm.support; Asu"#sd
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import org.rut.util.algorithm.SortUtil; Vnb#N4vR
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/** )6+W6:
* @author treeroot AI; =k
* @since 2006-2-2 F
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* @version 1.0 ~U+'3.Wo
*/ s9Z2EjQV
public class HeapSort implements SortUtil.Sort{ 8:fiO|~%
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/* (non-Javadoc) U~t(YT
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cpnwx1q@
*/ ,m]q+7E
public void sort(int[] data) { 6|}mTG^
MaxHeap h=new MaxHeap(); #?6RoFgMe
h.init(data); ]!:Y]VYN)\
for(int i=0;i h.remove(); rtE,SN
System.arraycopy(h.queue,1,data,0,data.length); h
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} B{ "<\g
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private static class MaxHeap{ nTKfwIeg5
zUqDX{I8
void init(int[] data){ rSn7(3e4^
this.queue=new int[data.length+1]; q8>Q,F`BA
for(int i=0;i queue[++size]=data; |Wk
G='02
fixUp(size); 3k^jR1
} m5{SPa,y
} !F)oX7"
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^4
private int size=0; }*.*{I
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private int[] queue; >.\E'e5^C
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public int get() { 9 To6Rc;
return queue[1]; "QS7?=>*F
} ||aU>Wj4
`0:@`)&g1
public void remove() { 9lV'3UG-?
SortUtil.swap(queue,1,size--); 4PQWdPv;
fixDown(1); .vMi<U;
} %A3Jd4DH
file://fixdown 9#!tzDOtD
private void fixDown(int k) { nT"z(\i.!J
int j; {+Yo&F}n
while ((j = k << 1) <= size) { }}_l@5
if (j < size %26amp;%26amp; queue[j] j++; &)-?=M
if (queue[k]>queue[j]) file://不用交换 H
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break; BYU.ptiJJ
SortUtil.swap(queue,j,k); ]U%Tm>s.
k = j; A4' aB0^
} @jKB!z9{
} (.o'1'
private void fixUp(int k) { W( YJz#]6_
while (k > 1) { "#jKk6{I0
int j = k >> 1; 7ZZt|bl
if (queue[j]>queue[k]) K#r`^aUc
break; I]X<L2
SortUtil.swap(queue,j,k); kZQ;\QL1}
k = j; UhK,H
} GWKefH
} r$5!KO
51x,[y+Xe
} :cTi$n
qv\yQ&pj
} v*3:8Y,
wn`budH?c8
SortUtil: O5
SX"A
?*,q#ZkA9W
package org.rut.util.algorithm; ^MUM04l
:%{7Q$Xv<
import org.rut.util.algorithm.support.BubbleSort; z/b*]"g,
import org.rut.util.algorithm.support.HeapSort; 4<|u~n*JF
import org.rut.util.algorithm.support.ImprovedMergeSort; {SV$fl;
import org.rut.util.algorithm.support.ImprovedQuickSort; zdCt#=QV?R
import org.rut.util.algorithm.support.InsertSort; Za w+
import org.rut.util.algorithm.support.MergeSort; X!Q"p$D4(
import org.rut.util.algorithm.support.QuickSort; qb&*,zN
import org.rut.util.algorithm.support.SelectionSort; t
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import org.rut.util.algorithm.support.ShellSort; kWFR(J&R
Lrq&k40y
/** V
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* @author treeroot o;fQ,rP%
* @since 2006-2-2 ^-ZqS
* @version 1.0 o/R-1\Dn
*/ Wm 61
public class SortUtil { s/V[tEC*z
public final static int INSERT = 1; t&_lpffv
public final static int BUBBLE = 2; [z\*Zg
public final static int SELECTION = 3; :[doYizk:
public final static int SHELL = 4; lV8Mr6m
public final static int QUICK = 5; N5^:2ag
public final static int IMPROVED_QUICK = 6; +Q.[W`goV
public final static int MERGE = 7; M:x(_Lu
public final static int IMPROVED_MERGE = 8; v;SJgZK
public final static int HEAP = 9; zw?6E8$h
C$8=HM3
public static void sort(int[] data) { e
6*=Si}V
sort(data, IMPROVED_QUICK); *3|KbCX
} NQmDm!-4
private static String[] name={ zx27aZ[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Ax
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}; \;}dSSB1
"T PMSx&Ei
private static Sort[] impl=new Sort[]{ o%:eYl
new InsertSort(), -UO$$)Q
new BubbleSort(), o&=m]hKpQl
new SelectionSort(), 6o!"$IH4
new ShellSort(), ^IpS 3y
new QuickSort(), mYCGGwD
new ImprovedQuickSort(), RaAq>B
WPr
new MergeSort(), pS0T>r
new ImprovedMergeSort(), b> |oU
new HeapSort() -Db(
}; g(1'i 1
Uu
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public static String toString(int algorithm){ ~c4Y*]J
return name[algorithm-1]; Ae1},2py
} "'%x|nB
xfb%bkr
public static void sort(int[] data, int algorithm) { J#\/znT
impl[algorithm-1].sort(data); ~jgd92`{z
} "='|c-x
wjkN%lPfvj
public static interface Sort { p~t$ll0s
public void sort(int[] data); rie1F,
} \C#Vh7z"2&
'2NeuK -KD
public static void swap(int[] data, int i, int j) { YV+e];s
int temp = data; @I%m}>4Jm
data = data[j]; b+kb7
data[j] = temp; X:YxsZQ5Y
} Z=#!FZ{
} ^VA)vLj@