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。 )5t_tPv
插入排序: *=Fcu@
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package org.rut.util.algorithm.support; uJO*aA{K
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import org.rut.util.algorithm.SortUtil; #X8[g _d/
/** Rk=B;
* @author treeroot ]@P*&FRcZ
* @since 2006-2-2 O>Sbb2q?"
* @version 1.0 Xm4wuX"e=
*/ 96.Wfx
public class InsertSort implements SortUtil.Sort{ 9j"\Lr*o"
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/* (non-Javadoc) Yru[{h8hw`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w-"&;klV
*/ e)7)~g54
public void sort(int[] data) { ; M(}fV]
int temp; _"bx#B*
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ayD\b6Z2.
} 5Z[D(z
} C;5}/J^E
} U)!AH^{32
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} f+6l0@K2
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冒泡排序: MH?B.2
T42g4j/l~
package org.rut.util.algorithm.support; |- fx
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import org.rut.util.algorithm.SortUtil; agYKaM1N
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/** MUrY >FYgx
* @author treeroot 6{
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* @since 2006-2-2 [UH5D~Yx
* @version 1.0 ge[i&,.&z
*/ DX";v
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public class BubbleSort implements SortUtil.Sort{ I/aAx.q
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/* (non-Javadoc) [}2.CM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >I?Mi{'a
*/ =oME~oB~
public void sort(int[] data) { 4m*(D5Y=|
int temp; Ic
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for(int i=0;i for(int j=data.length-1;j>i;j--){ mz*z1`\7v\
if(data[j] SortUtil.swap(data,j,j-1); \bOjb\ w$
} Yg[IEy
} .;b>
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} ".%LBs~$
} lt4jnV2"a
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} *u/|NU&X
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选择排序: >~rd5xlk
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package org.rut.util.algorithm.support; Y:,R7EO{!
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import org.rut.util.algorithm.SortUtil; )6&\WNL-x
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/** A#X.c=
* @author treeroot
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* @since 2006-2-2 Y:%)cUxA
* @version 1.0 e@=[+iJc
*/ rx>Tc#g
public class SelectionSort implements SortUtil.Sort { C..2y4bA}
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/* l;*lPRoW,
* (non-Javadoc) rA,Y_1b *
* iBQBHF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |T$a+lHMD
*/ m{lRFKx>s
public void sort(int[] data) { 4-M6C 5#.
int temp; TFJ{fLG
for (int i = 0; i < data.length; i++) { [Yx-l;78
int lowIndex = i; c(Uj'uLc
for (int j = data.length - 1; j > i; j--) { }GNkB
if (data[j] < data[lowIndex]) { hDB`t
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lowIndex = j; C*{15!d:G
} +%e%UF@
} uF]D
SortUtil.swap(data,i,lowIndex); yA!3XUi
} nXM9Px!
} MOp=9d+N~
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} o}mhy`}
} `>J6y9
Shell排序: v E3{H
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package org.rut.util.algorithm.support; 3Y1TQ;i,wQ
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import org.rut.util.algorithm.SortUtil; +X* F<6mZ
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/** 7X9+Qj;
* @author treeroot vI
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* @since 2006-2-2 XJ
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* @version 1.0 U,%s;
*/ P|unUW(P
public class ShellSort implements SortUtil.Sort{ vKU]80T
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/* (non-Javadoc) }"%!(rx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /32Ta
*/ 4B:\
public void sort(int[] data) { ALE808;|
for(int i=data.length/2;i>2;i/=2){ E<D+)A
for(int j=0;j insertSort(data,j,i); |uQn|"U4
} 4'+d"Ok
} 9O),/SH;:
insertSort(data,0,1); vbr~<JT=
} q
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#t"9TP
/** +}Kk2Kg8
* @param data ~fyF&+ibp'
* @param j +G5'kYzJ
* @param i EHH|4;P6
*/ >[Xm|A#
private void insertSort(int[] data, int start, int inc) { &M0o&C-1/
int temp; Q;XXgX#l
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Nhjle@J<
} L\QQjI{
} c_~XL^B@
} 8pXfT%]
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} &(lMm )
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快速排序: ^bF}_CSE
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package org.rut.util.algorithm.support; ]MC/t5vC u
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import org.rut.util.algorithm.SortUtil; ;
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/** UP\8w#~
* @author treeroot cYsR0#
* @since 2006-2-2 D*|(
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* @version 1.0 7^c2e*S
*/ (&q@~
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public class QuickSort implements SortUtil.Sort{ 1UC2zM"
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/* (non-Javadoc) 1oB$MQoc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0 9tikj1
*/ $B<~0'6}
public void sort(int[] data) { CP}0Ri)
quickSort(data,0,data.length-1); )m|C8[ u
} A3xbT\xdg
private void quickSort(int[] data,int i,int j){ [`q.A`Fd
int pivotIndex=(i+j)/2; bSQ_"
file://swap X )I/%{
SortUtil.swap(data,pivotIndex,j); 3QH(4N
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int k=partition(data,i-1,j,data[j]); /#29Y^Z)=
SortUtil.swap(data,k,j);
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if((k-i)>1) quickSort(data,i,k-1); [70Y,,w
if((j-k)>1) quickSort(data,k+1,j); wbBE@RU>!
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} QDP-E[
/** SzRL}}I
* @param data 2%bhW,?I
* @param i :g&>D#{
* @param j '=$TyiU
* @return MdLj,1_T
*/ R j-jAH
private int partition(int[] data, int l, int r,int pivot) { m^z,,t9
do{ HTw#U2A;+
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); `Rrr>vj
SortUtil.swap(data,l,r); 0"hiCGm'
} ma3Qi/
while(l SortUtil.swap(data,l,r); O!o <P5X^
return l; :#qUMiu$
} r|M'TA~:
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O]\
} ^<!Ia
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改进后的快速排序: gEE9/\>%-
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package org.rut.util.algorithm.support; vXc!Zg~
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import org.rut.util.algorithm.SortUtil; av$
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/** wtq,`'B
* @author treeroot }lH;[+u3
* @since 2006-2-2 c$/<l5Uw
* @version 1.0 {JTmP `&l
*/ >)4.$#H
public class ImprovedQuickSort implements SortUtil.Sort { )4PB<[u
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private static int MAX_STACK_SIZE=4096; R !9qQn?
private static int THRESHOLD=10; t~q?lT
/* (non-Javadoc) 9g96 d-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $]Jf0_
*/ iFSJ4 W(
public void sort(int[] data) { Bf/|{@
int[] stack=new int[MAX_STACK_SIZE]; f0OgK<.>T
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int top=-1; J, r Xx:
int pivot; (VEp~BW@-R
int pivotIndex,l,r; ;e2Ij
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stack[++top]=0; TKd6MZhT
stack[++top]=data.length-1; Gj)uyjct
*]>])ms)
while(top>0){ z1#oWf{*
int j=stack[top--]; ,^HS`!s[ E
int i=stack[top--]; (N7O+3+G
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pivotIndex=(i+j)/2; SijS5irfk
pivot=data[pivotIndex]; $ND90my
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SortUtil.swap(data,pivotIndex,j); <;aJ#qT
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file://partition 9]Lo
l=i-1; `wf|u M
r=j; Ep<YCSQy$i
do{ $Vsy%gA<
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 9?$RO[vo
SortUtil.swap(data,l,r); x`#22"m
} BK*z 4m
while(l SortUtil.swap(data,l,r); moaodmt]x
SortUtil.swap(data,l,j); 1EQvcw#
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if((l-i)>THRESHOLD){ p+vh[+yp
stack[++top]=i; C>NQ-w^
stack[++top]=l-1; RNvQ
} D@:"f?K>
if((j-l)>THRESHOLD){ t|<FA#
stack[++top]=l+1; q#jEv- j.
stack[++top]=j; /e .D/;]
} S{-f$Q*
G@B*E%$9
} ^g[J*{+!W
file://new InsertSort().sort(data); i2`#
insertSort(data); }DbE4"^K7
} tq0;^L
/** i0iez9B
* @param data Y|:YrZSC
*/ xFU5\Zuw
private void insertSort(int[] data) { vcwK6G
int temp; HZ{n&iJ
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); fQP,=
} H@Q`
} puA|NT
} cFDxjX?~
+O4( a.
} ZJ9x6|q
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归并排序: 95[wM6?J
bb}?h]a
package org.rut.util.algorithm.support; IqNpLh|[
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import org.rut.util.algorithm.SortUtil; l^
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/** >gnF]<
* @author treeroot qfa}3k8et
* @since 2006-2-2 ~o i)Lf1
* @version 1.0 8?kP*tmcZ
*/ j3{HkcjJG
public class MergeSort implements SortUtil.Sort{ mTJ"l(,3
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/* (non-Javadoc) 3(C :X1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _F^$aZt?e
*/ @UV{:]f~e
public void sort(int[] data) { BKX9SL]
int[] temp=new int[data.length]; xG8`'SNY
mergeSort(data,temp,0,data.length-1); 6< >SHw
} *%I[ ke *
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private void mergeSort(int[] data,int[] temp,int l,int r){
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int mid=(l+r)/2; fx]eDA|$e
if(l==r) return ; F3Ap1-%z
mergeSort(data,temp,l,mid); OT;cfkf7
mergeSort(data,temp,mid+1,r); -zTEL(r
for(int i=l;i<=r;i++){ M!#AfIyB
temp=data; E23w *']
} NHAH#7]M&1
int i1=l; bNXAU\M^
int i2=mid+1; @C=M
UT-!
for(int cur=l;cur<=r;cur++){ #52NsVaT@
if(i1==mid+1) |by@ :@*y
data[cur]=temp[i2++]; u1N1n;#
else if(i2>r) ^aHh{BQ%
data[cur]=temp[i1++]; M%|f+u &
else if(temp[i1] data[cur]=temp[i1++]; p/3BD&6
else [Y$V\h=V
data[cur]=temp[i2++]; |(RZ/d<X\a
} ULIFSd Y
} n]v7V&mj\
{@45?L('
} ~z`/9;
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改进后的归并排序: J.W Ho
c
T/NjNEd#
package org.rut.util.algorithm.support; LXNQb6!
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import org.rut.util.algorithm.SortUtil; 79wLT\&
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/** 8%-%AWF]
* @author treeroot Hd374U<8]T
* @since 2006-2-2 BGzO!s*@j
* @version 1.0 hlC%HA
*/ ]-a{IWVN
public class ImprovedMergeSort implements SortUtil.Sort { FT(iX`YQ
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private static final int THRESHOLD = 10; l&Q!mU}
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/* 3q?5OL^$
* (non-Javadoc) )88nMH-
* vhpvO>Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )!sa)\E?
*/ e#khl9j*bt
public void sort(int[] data) { Wcn[gn<
int[] temp=new int[data.length]; [ f34a
mergeSort(data,temp,0,data.length-1); puF%=i
} "H?QqrKx
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private void mergeSort(int[] data, int[] temp, int l, int r) { :XYy7xz<
int i, j, k; JGgxAd{L
int mid = (l + r) / 2; B9^R8|V
if (l == r) jA<T p}$!
return; n_9x"m$
if ((mid - l) >= THRESHOLD) F@EJtwLd5y
mergeSort(data, temp, l, mid); >A=\8`T^
else (bvoF5%
insertSort(data, l, mid - l + 1); nB&j
if ((r - mid) > THRESHOLD) R04J3D|
mergeSort(data, temp, mid + 1, r); > 0T
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else SX_4=^
insertSort(data, mid + 1, r - mid); H(&Z:{L
t!t=|JNf{
for (i = l; i <= mid; i++) { 6v>z h
temp = data; \igaQ\~
} oCuV9dA.
for (j = 1; j <= r - mid; j++) { Hm4bN\%
temp[r - j + 1] = data[j + mid]; 2yxi= XWZ
} VDpxk$a
int a = temp[l]; c3W
BALdh
int b = temp[r]; CC#C
for (i = l, j = r, k = l; k <= r; k++) { kc Y,vl
if (a < b) { PUCx]5
data[k] = temp[i++]; ~K`1
a = temp; bjzx!OCpV
} else { Bm}iU~(Z`
data[k] = temp[j--]; nh0&'hA
b = temp[j]; agT7=hX].
} j3 P$@<
} eM }W6vIn
} 8[R1A
m8AAp1=
/** !Rqx2Q
* @param data gQ+9xT d
* @param l ]nc2/S%
* @param i ._,trb>o
*/ 50Ad,mn<
private void insertSort(int[] data, int start, int len) { FWY[=S
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); JJ-i_5\q
} U|?,N0%Z1
} kFwxK"n@C
} 9|3o<
} Z
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堆排序: |X 3">U +-
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package org.rut.util.algorithm.support; )E-E0Hl>7
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import org.rut.util.algorithm.SortUtil; ANb"oX c
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/**
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* @author treeroot +'%\Pr(
* @since 2006-2-2 afUTAP@
* @version 1.0 (Fqa][0
*/ c/'M#h)"
public class HeapSort implements SortUtil.Sort{ wko2M[
4m /TW)
/* (non-Javadoc) k%Eh{dA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h>W@U9
*/ gn.Ol/6D
public void sort(int[] data) { *l-`<.
MaxHeap h=new MaxHeap(); H&K3"Ulw
h.init(data); `
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for(int i=0;i h.remove(); &CUC{t$VHX
System.arraycopy(h.queue,1,data,0,data.length); blp=Hk
} )&z4_l8`=
.YC;zn^
private static class MaxHeap{ k*Pz&8|
1i+FL''
void init(int[] data){ kwF] TO
S
this.queue=new int[data.length+1]; qHJ'1~?q
for(int i=0;i queue[++size]=data; \u8,!) 4i
fixUp(size); G/(*foT8SE
} )E~_rDTl
} {MxnIg7'
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private int size=0; }{mG/(LX8
w+Vk3c5uI)
private int[] queue; :l`i4kx
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public int get() { h!Y?SO.b
return queue[1]; /{R3@,D[]
} {XHk6w
*-
|*E"G5WZM
public void remove() { ~d>uXrb
SortUtil.swap(queue,1,size--); ~bGnq,
.$
fixDown(1); `M)E* G
} ns26$bU
file://fixdown gQR1$n0
private void fixDown(int k) { 9FNwpL'C
int j; @>:i-5
while ((j = k << 1) <= size) { df
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if (j < size %26amp;%26amp; queue[j] j++; X'@f"= v9k
if (queue[k]>queue[j]) file://不用交换 hHEPNR[.
break; $+TYvA'N
SortUtil.swap(queue,j,k); ?`aTu:1#Z
k = j; u}m.}Mws
} bP03G=`6w
} lC2?sD$
private void fixUp(int k) { P}l#VJWp
while (k > 1) { _uJVuCc
int j = k >> 1; >HIt}Zh
if (queue[j]>queue[k]) r`[B@
break; 0\wi am-
SortUtil.swap(queue,j,k); L;Vq j]_
k = j; L~
2q1
} ngLJ@TP-
} gLx/w\l6
!EM#m@kZ{
} t9Vb~ Ubdb
YLmjEs%
} #s{aulx
(Com,
SortUtil: 1 KB7yG-#6
#B}Qt5w
package org.rut.util.algorithm; Jh^8xI,`C
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import org.rut.util.algorithm.support.BubbleSort; _25d%Ne0
import org.rut.util.algorithm.support.HeapSort; pI5_Hg
import org.rut.util.algorithm.support.ImprovedMergeSort; hb<k]-'!
import org.rut.util.algorithm.support.ImprovedQuickSort; 6}STp_x
import org.rut.util.algorithm.support.InsertSort; eQ\jZ0s;p
import org.rut.util.algorithm.support.MergeSort; !%wdn33"
import org.rut.util.algorithm.support.QuickSort; QXB|!'
import org.rut.util.algorithm.support.SelectionSort; "qgu$N4/>
import org.rut.util.algorithm.support.ShellSort; 117c,yM0
8H_l[/
/** $W*|~}F/Ap
* @author treeroot F"v:}Vy|
* @since 2006-2-2 9M]^l,
* @version 1.0 |=u96G~N
*/ 6+)x7g1PL
public class SortUtil { shNE~TA
public final static int INSERT = 1; k{{hZ/om
public final static int BUBBLE = 2; W\NG>t
public final static int SELECTION = 3; T*R{L
public final static int SHELL = 4; 44j,,k
public final static int QUICK = 5; ?DRR+n _
public final static int IMPROVED_QUICK = 6; X?R
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public final static int MERGE = 7; :t%)5:@A
public final static int IMPROVED_MERGE = 8; dEG ]riO
public final static int HEAP = 9; Fn> <q:
$NdH*
public static void sort(int[] data) { VAg68EbnF
sort(data, IMPROVED_QUICK); +nzTxpcP@K
} !%V*UR9
private static String[] name={ 1xIFvXru
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T$IUKR
}; ~ttKI4
@C07k^j=U
private static Sort[] impl=new Sort[]{ ", QPb3
new InsertSort(), >HX)MwAP
new BubbleSort(), 3AvcJ1
new SelectionSort(), z
7@ 'CJ
new ShellSort(), q}e]*]dJZ
new QuickSort(), +xq=<jy
new ImprovedQuickSort(), 9GE]<v,_[
new MergeSort(), 3@'lIV
?,q
new ImprovedMergeSort(), ^1Yo-T(R
new HeapSort() uD[^K1Ag]^
}; 0H<4+
*`K
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public static String toString(int algorithm){ @f%wd2
return name[algorithm-1]; )lOji7&e
} =nw0# '
u
X>PefR
public static void sort(int[] data, int algorithm) { w0X$rl1
impl[algorithm-1].sort(data); >R#9\/s
} Stt* 1gT
MorW\7-}
public static interface Sort { I X?@~'
public void sort(int[] data); egbb1+tY
} OFQ{9
RRNH0-D1l
public static void swap(int[] data, int i, int j) { ze
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int temp = data; n-W?Z'H{r
data = data[j]; E::<;9
data[j] = temp; j $KM9
} "s${!A)
} Ir^ BC!<2>