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。 D&6.> wt
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插入排序: ;F/s!bupCM
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package org.rut.util.algorithm.support; = d !YM6G
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import org.rut.util.algorithm.SortUtil; .]; `
/** R1/mzPG
* @author treeroot 2p*L~! iM
* @since 2006-2-2 B^j(Fq
* @version 1.0
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*/ \'B%lXh
public class InsertSort implements SortUtil.Sort{ LEAU3doK;
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/* (non-Javadoc) nd h\+7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u}jC$T>2%6
*/ |+1k7S,
public void sort(int[] data) { I.1(qbPkF+
int temp; &qm:36Y7Xg
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Eq5X/Hx
} 0}\8,U
} }jL4F$wC
} ItG|{Bo
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} "ZG2olOqLI
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冒泡排序: Jx8DVjy
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package org.rut.util.algorithm.support; $o*p#LU
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import org.rut.util.algorithm.SortUtil; jG,^~5x
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/** -B:O0;f
* @author treeroot :(4];Va
* @since 2006-2-2 i6k~j%0m
* @version 1.0 o H]FT{
*/ ::Pf\Lb>
public class BubbleSort implements SortUtil.Sort{ sP%J`L@h
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/* (non-Javadoc) wOR#sp&
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FNXVd/{M3
*/ 2VkA!o4nP
public void sort(int[] data) { K$-|7tJon
int temp; D!bi>]Yd
for(int i=0;i for(int j=data.length-1;j>i;j--){ <-!'V,c
if(data[j] SortUtil.swap(data,j,j-1); )umW-A
} h6e,w$IL
} u6/;=]0
} 0Pg@%>yb~
} V`LW~P;
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} R-\"^BV#Z
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选择排序: 4$4n9`odE
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package org.rut.util.algorithm.support; a0cW=0l=
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import org.rut.util.algorithm.SortUtil; L%f$ &
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/** 4cAx9bqA
* @author treeroot jq+:&8!8(e
* @since 2006-2-2 Z
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* @version 1.0 l4q7,%G
*/ ~#iAW@
public class SelectionSort implements SortUtil.Sort { uF]+i^+
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/* 4?~Ei[KgQn
* (non-Javadoc) d6"B_,*b
* E>qe hs,g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Bzr}+J
*/
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public void sort(int[] data) { Y\{lQMCy
int temp; 76S>xnN
for (int i = 0; i < data.length; i++) { Jry643K>:;
int lowIndex = i; GC~N$!*
for (int j = data.length - 1; j > i; j--) { +Z%8X!Q
if (data[j] < data[lowIndex]) { /Pa<I^-#
lowIndex = j; 90+Hv:wF
} V;]U]
} GI#TMFz3
SortUtil.swap(data,i,lowIndex); U,nQnD"!t&
} Ji:0J},m
} }/Y)^
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} Y^uYc}
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Shell排序: IeJ@G)
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package org.rut.util.algorithm.support; ]\:l><
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import org.rut.util.algorithm.SortUtil; Re'Ek
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/** ZQrgYeQl"
* @author treeroot O}"fhMk
* @since 2006-2-2 \ffU15@N
* @version 1.0 |-VbJd
*/ *wJ'Z4_5F
public class ShellSort implements SortUtil.Sort{ |c!lZo/
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/* (non-Javadoc) Px"K5c*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pXHeUBY.
*/ :a9$f8*b
public void sort(int[] data) { " qrL:,
for(int i=data.length/2;i>2;i/=2){ F84?Mi{r2
for(int j=0;j insertSort(data,j,i); , MU9p*
} aV?r %'~Z
} Jl,\^)DSw
insertSort(data,0,1); ]mvVX31T
} 9i#K{CkC|
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/** 6c&OR2HGqO
* @param data n0kkUc-`
* @param j g3,F+
* @param i .Dg'MMBM
*/ x$tzq+N
private void insertSort(int[] data, int start, int inc) { JZrUl^8E
int temp; v4wXa:CJ
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); UHUO9h
} 1oIu~f{`
} wenJ (0L|
} M;qV%
k
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} 9
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快速排序: L\UM12
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package org.rut.util.algorithm.support; MEn#MT/Cz
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import org.rut.util.algorithm.SortUtil; J'y*>dW
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/** N\dr_
* @author treeroot tc<t%]c
* @since 2006-2-2 )?PRG=
* @version 1.0 UQ 'U
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*/ y7#4Mcc`~
public class QuickSort implements SortUtil.Sort{ a'ODm6#
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/* (non-Javadoc) b(H)8#C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q! U'DDEP
*/ n;Etn!4M
public void sort(int[] data) { Dbo.N`
quickSort(data,0,data.length-1); !4G<&hvb
} H=k*;'
private void quickSort(int[] data,int i,int j){ v;@-bED(Qs
int pivotIndex=(i+j)/2; & A<Pf.Us
file://swap ;F<)BEXC<
SortUtil.swap(data,pivotIndex,j); h8_~ OX
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int k=partition(data,i-1,j,data[j]); Aw *:5 I[
SortUtil.swap(data,k,j); DY%#E9
if((k-i)>1) quickSort(data,i,k-1); c F(]`49(
if((j-k)>1) quickSort(data,k+1,j); }ZWeb#\
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} $R<eXDW6:
/** DweWFipyPi
* @param data 7eg//mL"6
* @param i 4';tMiz
* @param j VCvqiHn
* @return oWUDTio#[
*/ RycO8z*p
private int partition(int[] data, int l, int r,int pivot) { 8; s$?*Gi
do{ XOy#?X/`
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); bz?
*#S
SortUtil.swap(data,l,r); d.&~n`Rv!p
} O}3M+
while(l SortUtil.swap(data,l,r); %7?v='s=
return l;
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} {L8(5
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} }`9}Q
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改进后的快速排序: qlg~W/
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package org.rut.util.algorithm.support; G{ $Zg
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import org.rut.util.algorithm.SortUtil; ]X)EO49
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/** BE}qwP^
* @author treeroot Do|`wpR
* @since 2006-2-2 8Q1){M9'
* @version 1.0 Pne[>}_l/
*/ rLcQG
public class ImprovedQuickSort implements SortUtil.Sort { Pz"!8b-MN
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private static int MAX_STACK_SIZE=4096; r(yb%p+
private static int THRESHOLD=10; 2aN
/* (non-Javadoc) !2N#H~{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +:d))r=n
*/ G?/1
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public void sort(int[] data) { VMW?[j
int[] stack=new int[MAX_STACK_SIZE]; mYk5f_}
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int top=-1; n.y72-&v
int pivot; AsM""x1Ix
int pivotIndex,l,r; hGF(E*
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stack[++top]=0; N3H!ptn37
stack[++top]=data.length-1; x9HA^Rj4-
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while(top>0){ T+2I:W%
int j=stack[top--]; bct&ge7YX
int i=stack[top--]; [M2,bc8SJV
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pivotIndex=(i+j)/2; f|FQd3o)
pivot=data[pivotIndex]; _wf"E(c3D
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SortUtil.swap(data,pivotIndex,j); |P2GL3NR
^ :Q |,oy
file://partition k>n^QHM
l=i-1; =k`(!r2"#
r=j; $(}kau
do{ DD'<zL[
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); (w% hz']
SortUtil.swap(data,l,r); cuquA ~
} vVLR9"rHM
while(l SortUtil.swap(data,l,r); mI in'M
SortUtil.swap(data,l,j); cVn7jxf
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if((l-i)>THRESHOLD){ Z#;ieI\
stack[++top]=i; e= "/oo
stack[++top]=l-1; <z)MV
oa
} b)w3
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if((j-l)>THRESHOLD){ Ze Shn
stack[++top]=l+1;
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stack[++top]=j; :ykZ7X&
} i`8!Vm
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} /IV:JVT
file://new InsertSort().sort(data); Q:VD2<2
insertSort(data); ,bmTBZV
} a$t [}D2
/** nhXa&Nro
* @param data rmQGzQnun
*/ 4b3p,$BWS
private void insertSort(int[] data) { <k^9l6@
int temp; WM=kr$/3
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); >o>'@)I?e6
} -07(#>
} B{1+0k
} 6x/ X8zu
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} E4y"$U%.
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归并排序: |Be.r{l
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package org.rut.util.algorithm.support; NK#Dq&W+&
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import org.rut.util.algorithm.SortUtil; a/)TJv
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/** `O}.
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* @author treeroot <6L$:vT_
* @since 2006-2-2 N{p2@_fnB
* @version 1.0 vW)GUAF[
*/ p6}jCGJ
public class MergeSort implements SortUtil.Sort{ *%)L?*
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/* (non-Javadoc) NKd@Kp`,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) PL+fLCk,I
*/ ={L:q8v)
public void sort(int[] data) { `8'T*KU
int[] temp=new int[data.length];
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mergeSort(data,temp,0,data.length-1); )If[pw@j
} ir,Zc\C
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private void mergeSort(int[] data,int[] temp,int l,int r){ LK:|~UV?
int mid=(l+r)/2; [Q 2t,tQx
if(l==r) return ; Vj?.' (
mergeSort(data,temp,l,mid); GF/p|I D
mergeSort(data,temp,mid+1,r); UN>hJN;c
for(int i=l;i<=r;i++){ zRE7 w:
temp=data; Z p__
} D *LZ_
int i1=l; E!Fy2h>[Z
int i2=mid+1; ]&G5/]f
for(int cur=l;cur<=r;cur++){ <
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if(i1==mid+1) swLgdk{8n
data[cur]=temp[i2++]; :&or'Yi}
else if(i2>r) |g'sRTKJ
data[cur]=temp[i1++]; 8v]{ 5
else if(temp[i1] data[cur]=temp[i1++]; TyBNRnkt
else 2Vu|uZd
data[cur]=temp[i2++]; Z(}x7j zW
} )uX:f8
} ap6Vmp
fnmZJJ,Q
} LiB0]+wzj
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改进后的归并排序: *V"cu
s~]nsqLt9p
package org.rut.util.algorithm.support; l
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import org.rut.util.algorithm.SortUtil; nO|S+S_9
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/** Q^p@ 1I
* @author treeroot +tV(8h4
* @since 2006-2-2 *UyV@
* @version 1.0 TM^1{0;r5
*/ =AKW(v
public class ImprovedMergeSort implements SortUtil.Sort { ^g[])2",
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private static final int THRESHOLD = 10; HRb_ZJz
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/* a<Ns C1
* (non-Javadoc) FQ-(#[
* ]nQ$:%HP
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) rL,)Tc|"
*/ YwF6/JA0^
public void sort(int[] data) { (%P* rl
int[] temp=new int[data.length]; `r iv`+J{s
mergeSort(data,temp,0,data.length-1); Fb``&-Qm:
} TAAsV#l
Bs1-UI}+
private void mergeSort(int[] data, int[] temp, int l, int r) { =)zq%d?i;
int i, j, k; n7MS{`
int mid = (l + r) / 2; c'|MC[^A
if (l == r) 0}^-, Q,
return; DS$ _"'g%i
if ((mid - l) >= THRESHOLD) "w'YZO]>
mergeSort(data, temp, l, mid); "yz\p,
else 4KM$QHS5{
insertSort(data, l, mid - l + 1); iP!Y4F
if ((r - mid) > THRESHOLD) G/8xS=
mergeSort(data, temp, mid + 1, r); ?X9
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else asq/_`
insertSort(data, mid + 1, r - mid); Hwc{%.% ae
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for (i = l; i <= mid; i++) { hL3,/^;E ,
temp = data; 5{u6qc4FW
} FSQ&J|O
for (j = 1; j <= r - mid; j++) { 2s4=%l
temp[r - j + 1] = data[j + mid]; DdQf%W8u
} u:S@'z>
int a = temp[l]; XOeh![eMX
int b = temp[r]; hv"toszj\
for (i = l, j = r, k = l; k <= r; k++) { 6>L. )V
if (a < b) { __V]HcP;
data[k] = temp[i++]; ^2AF:(E
a = temp; D}061~zb$
} else { _5K_YhT
data[k] = temp[j--]; k,@J&
b = temp[j]; &Bp\kv
} |ber:1
} ZKR z=(
} (k5DbP[
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/** wrO>#`Z
* @param data a?Y1G3U'
* @param l i]53A0l
* @param i vl5n%m H>^
*/ O7d Fz)$
private void insertSort(int[] data, int start, int len) { OhW=F2OIV
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8@fDn(]w
} O9|'8"AF
} hY1|qp
} AslH
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} >#:/
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PD}R7[".>
堆排序: _RW[]MN3*
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package org.rut.util.algorithm.support; ).]m@g:ew
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import org.rut.util.algorithm.SortUtil; VBX#
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/** [[e |GQ
* @author treeroot p-pw*wH0
* @since 2006-2-2 -/-6Td1JY>
* @version 1.0 #8z,'~\
*/ w}Upa(dU
public class HeapSort implements SortUtil.Sort{ 2&Byq
R2$ U K
/* (non-Javadoc) ,OKM\N,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yo*iv+l
*/ K7hf m%`N
public void sort(int[] data) { }R1`ThTM
MaxHeap h=new MaxHeap(); gr
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h.init(data); j>o +}p?3I
for(int i=0;i h.remove(); bJ|?5
System.arraycopy(h.queue,1,data,0,data.length); <]'"e]
} @g75T` N
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private static class MaxHeap{ 0H3T'J%r
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void init(int[] data){ GVEWd/:X(
this.queue=new int[data.length+1]; u!uDu,y
for(int i=0;i queue[++size]=data; Y(y9l{'
fixUp(size); (oXN >^-D
} VWshFI
} DVhTb
+?iM$}8!U
private int size=0; <s-@!8*(
Uxemlp%%*
private int[] queue; 5b#6 Y
*|HZ&}
public int get() { j/9QV
return queue[1]; KupMndK
} p{a]pG+3
Ys$YI{
public void remove() { v1C.\fL
SortUtil.swap(queue,1,size--); Tq84Fn!HJ>
fixDown(1); \5P.C
} <8)s
file://fixdown F36ViN\b
private void fixDown(int k) { c[ony:6
int j; =$8@JF'
while ((j = k << 1) <= size) { [S]!+YBK
if (j < size %26amp;%26amp; queue[j] j++; d=Do@)
m|
if (queue[k]>queue[j]) file://不用交换 {TncqA
break; c,q"}nE8w
SortUtil.swap(queue,j,k); 0sd-s~;
k = j; +V9B
} sdf%
} *kQCW#y0
private void fixUp(int k) { ~B!O~nvdQ
while (k > 1) { z9 w&uZzi
int j = k >> 1; ~u0xXfv#
if (queue[j]>queue[k]) naIv=
break; .NkAD-k`
SortUtil.swap(queue,j,k); cH;TnuX
k = j; D4q>R;
} YvruK:I
} `OP>(bU0
d>, V
} 6B''9V:s
PDIclIMS'F
} 5ttMua <G?
KO|pJ3
SortUtil: "W@XP+POAY
C,r`I/;
package org.rut.util.algorithm; h4anr7g{
EF=dXm/\
import org.rut.util.algorithm.support.BubbleSort; 7"q+"0G
import org.rut.util.algorithm.support.HeapSort; ~*!u
import org.rut.util.algorithm.support.ImprovedMergeSort; x48'1&m
import org.rut.util.algorithm.support.ImprovedQuickSort; 7B(bH8
import org.rut.util.algorithm.support.InsertSort; `4%;qLxngP
import org.rut.util.algorithm.support.MergeSort; 5_)@B]~nM
import org.rut.util.algorithm.support.QuickSort; 3eTrtCe$
import org.rut.util.algorithm.support.SelectionSort; YN@6}B#1
import org.rut.util.algorithm.support.ShellSort; NLQE"\#a
'e]HP-Y<
/** @ EmGexLPM
* @author treeroot G*\abL
* @since 2006-2-2 ZCQ<%f
* @version 1.0 90s;/y(
*/ T|@#w%c''
public class SortUtil { Cqgk
public final static int INSERT = 1; %f(S'<DhC
public final static int BUBBLE = 2; JzMZB"Z?
public final static int SELECTION = 3; pDq#8*q+v
public final static int SHELL = 4; #9`r XEz
public final static int QUICK = 5; (`6%og#8
public final static int IMPROVED_QUICK = 6; B:-U`CHHQ
public final static int MERGE = 7; -@2'I++"@
public final static int IMPROVED_MERGE = 8; A)Qh
public final static int HEAP = 9; Kej|1g1f
1TNz&=e
public static void sort(int[] data) { tqf&N0*
sort(data, IMPROVED_QUICK); 0||"r&:X
}
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private static String[] name={ dC`tN5
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" _1sMY hI
}; L)F1NuR
'j,oIqx
private static Sort[] impl=new Sort[]{ !:"-:O}>=,
new InsertSort(), SY,I>-%
new BubbleSort(), yI8m%g%
new SelectionSort(), o\ngR\>
new ShellSort(), xQJIM.
new QuickSort(), VLsh=v
new ImprovedQuickSort(), XDk'2ycv
new MergeSort(), H&X:!xa5
new ImprovedMergeSort(), AJyq>0p
new HeapSort() aDL)|>"Q
}; :N@U[Wx0A
%bP~wl~
public static String toString(int algorithm){ `c"4PU^
return name[algorithm-1]; k6Ihc?HL
} gYatsFyL
53
@oP
public static void sort(int[] data, int algorithm) { (*,8KLV_i
impl[algorithm-1].sort(data); 7DtIVMiK
} <%z@
1E8H%2$ V
public static interface Sort { u7;`4P:o@
public void sort(int[] data); 99e*]')A%
} XFW5AP
4'SaEsA~
public static void swap(int[] data, int i, int j) { HG2GZ}~^1
int temp = data; [yw%i h)
data = data[j]; _Vjpw,
data[j] = temp; GQN98Y+h
} lhqQCV
} s^w\zz Yb