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。 wjTW{Bg~G
插入排序: (ylZ[M&B:
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package org.rut.util.algorithm.support; y"iK)SH
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import org.rut.util.algorithm.SortUtil; mln%Rd6u/
/** S3Fj /2Q8
* @author treeroot s~A:*2 \
* @since 2006-2-2 F5+!Gb En
* @version 1.0 a :CeI
*/ OX}ZdM!&f
public class InsertSort implements SortUtil.Sort{ V"T5<HA9
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/* (non-Javadoc) 4 g8t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ([ A%>u>h
*/ p::`1
public void sort(int[] data) { @vO~'Xxq!
int temp; Hn]6re
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ItE)h[86
} @>F`;'_*z
} !>fi3#Fi
} v?o("I[ C
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} } :T}N]
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冒泡排序: >+%p}l:<\
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package org.rut.util.algorithm.support; sUZ2A1J}
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import org.rut.util.algorithm.SortUtil; PI)uBA;
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/** <U}25AR
* @author treeroot KssIoP
* @since 2006-2-2 P u}PE-b
* @version 1.0 ;(s.G-9S
*/ ~Q)Dcit-
public class BubbleSort implements SortUtil.Sort{ 0{u#{_
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/* (non-Javadoc) 7??j}ob>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (`d _DQ
*/ ah!fQLMH
public void sort(int[] data) { /4 .]L~
int temp; 9$^v*!<z\
for(int i=0;i for(int j=data.length-1;j>i;j--){ Mvk#$:8e
if(data[j] SortUtil.swap(data,j,j-1); %p};Di[V
} T_qh_L3
} Y|<1|wGG
} ROj=XM:+
} J!:v`gb#@A
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} F5<GGEQb
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选择排序: '~7 6Y9mv
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package org.rut.util.algorithm.support; $I a-go2W
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import org.rut.util.algorithm.SortUtil; NmV][0(BS
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/** ]2xoeNF/W{
* @author treeroot {N0ky=ud
* @since 2006-2-2 [,qb)
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* @version 1.0 DO?
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*/ cx4'rK.
public class SelectionSort implements SortUtil.Sort { 1F?ylZ|~
8;P_KRaE
/* uzL IllVX*
* (non-Javadoc) W97
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* +e)RT<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dYhLk2
*/ mW U*}-M
public void sort(int[] data) { 0Y\7A
int temp; |)Sx"B)
for (int i = 0; i < data.length; i++) { tA9(N>[*
int lowIndex = i; 1;9 %L@
for (int j = data.length - 1; j > i; j--) { >V3pYRA
if (data[j] < data[lowIndex]) { 4JjO.H
lowIndex = j; qzu%Pp6If
} ++0xa%:
} l7GLN1#m
SortUtil.swap(data,i,lowIndex); ^i~'aq
} O[#B906JB
} <*&2b
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} _xXDvBU
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Shell排序: bq`0$c%hN
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package org.rut.util.algorithm.support; LL=nMoS
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import org.rut.util.algorithm.SortUtil; "a>a
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/** 610hw376B
* @author treeroot \JEI+A PY*
* @since 2006-2-2 Gex%~';+q
* @version 1.0 (
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*/ VUGVIy.
public class ShellSort implements SortUtil.Sort{ 5>[j^g+@
>a1ovKF
/* (non-Javadoc) g,cl|]/\d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h3:dO|Z
*/ |CjE}5Op>
public void sort(int[] data) {
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for(int i=data.length/2;i>2;i/=2){ ^<O:`c6_
for(int j=0;j insertSort(data,j,i); cc$+"7/J^c
} REwZ41
} )*3sE1
insertSort(data,0,1); VR_ bX|
} jR&AQ-H&
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/** r` (U3EgP
* @param data 18U
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* @param j O}_Z"y
* @param i >|So`C3:e
*/ kzLtI w&.
private void insertSort(int[] data, int start, int inc) { %z:;t
int temp; [Lo}_v&
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); rhe;j/ /`
} c\pPwG
} H@xIAL
} c/E6}OWA
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} ua
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快速排序: +EBoFeeIG
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package org.rut.util.algorithm.support; bbU{ />yW
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import org.rut.util.algorithm.SortUtil; qZ7/d,w
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/** 2 9=L7
* @author treeroot KI="O6 h
* @since 2006-2-2 f
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* @version 1.0 K
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*/ i3} ^j?jA2
public class QuickSort implements SortUtil.Sort{ ul$YV9[\
,fwN_+5
/* (non-Javadoc) ?pv}~>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) DHV#PLbN$
*/ T9+ ?A
l
public void sort(int[] data) { +}@HtjM
quickSort(data,0,data.length-1); VJeN
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} nP >*0Fq
private void quickSort(int[] data,int i,int j){ >K9uwUi|b]
int pivotIndex=(i+j)/2; :#QYwb~
file://swap h4^
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SortUtil.swap(data,pivotIndex,j); NwdA@"YQ|
8PV`4=,OI
int k=partition(data,i-1,j,data[j]); <99Xg_e
SortUtil.swap(data,k,j); 3J{`]v5`
if((k-i)>1) quickSort(data,i,k-1); ]S~Z8T-[
if((j-k)>1) quickSort(data,k+1,j); Dyj5a($9"{
\5_7!.
} bG0t7~!{E
/** #`mo5
* @param data dviL5Eaj
* @param i mu/O\'5
* @param j ,]'?Gd
* @return ZAPT5
*/ ~sQN\]5VW
private int partition(int[] data, int l, int r,int pivot) { ;?i(WV}ee
do{ YQ_3[[xT
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); y$At$i>u
SortUtil.swap(data,l,r); XY8s \DK
} 5u\si4 BL{
while(l SortUtil.swap(data,l,r); 5"5D(
return l; ( {H5k''
} B;?"R
(Ia} ]q
} ,"u-V<>6O
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改进后的快速排序: HhaUC?JtSK
!\H!9FR
package org.rut.util.algorithm.support; _e=R[
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import org.rut.util.algorithm.SortUtil; cRX0i;zag
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/** >'@yq
* @author treeroot 3I?? K)Yl
* @since 2006-2-2 _1`*&k
JL~
* @version 1.0 Z2WAVSw
*/ HZdmL-1Z^+
public class ImprovedQuickSort implements SortUtil.Sort { _Va!Ky
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private static int MAX_STACK_SIZE=4096; yk9|H)-z
private static int THRESHOLD=10; .Mw'P\GtM
/* (non-Javadoc) b$nXljV4?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) OCF\*Sx
*/ |Q^ZI
public void sort(int[] data) { 3Bz0B a
int[] stack=new int[MAX_STACK_SIZE]; RV|: mI
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int top=-1; +n]U3b
int pivot; ZN|DR|cUY
int pivotIndex,l,r; qbkvwL9
@M?N[LG
stack[++top]=0; A:1O:LB=!
stack[++top]=data.length-1; t#~r'5va
nv(Pwb3B
while(top>0){ N
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int j=stack[top--]; |$":7)eH!
int i=stack[top--]; AU}P`fT!
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pivotIndex=(i+j)/2; 'N],d&fu^^
pivot=data[pivotIndex]; Uq&ne1
@YP\!#"8
SortUtil.swap(data,pivotIndex,j); uYS?# g
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file://partition pc5-'; n
l=i-1; TdP_L/>|J
r=j; E) >~0jv
do{ G.O0*E2V
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 0,(U_+n
SortUtil.swap(data,l,r); -@G|i$!
} rB}UFS)
while(l SortUtil.swap(data,l,r); [syuoJ
SortUtil.swap(data,l,j); I~MBR2$9
yE-&TW_q:>
if((l-i)>THRESHOLD){ @dcT8 YC
stack[++top]=i; _Q/D%7[pa
stack[++top]=l-1; (^Xp\dyZL
} pK4I?=A'
if((j-l)>THRESHOLD){ {!xPq%
stack[++top]=l+1; &~U8S^os
stack[++top]=j; er^z:1'
} t-lWvxXe
%$I\\qq>{
} dx[<@f2c
file://new InsertSort().sort(data); (hd^
insertSort(data); :N%cIxrqP
} 52tIe|KwL
/** }
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* @param data OibW8A4Z1
*/ }+QgRGQ
private void insertSort(int[] data) { /]T#@>('
int temp; 31wact^
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); =+97VO(w]G
} NDU,9A.P
} 'rRo2oTN
} rOB-2@-
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;<
} YU[93@mCh
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归并排序: t</rvAH E
`Qv7aY
package org.rut.util.algorithm.support; O qY8\>f-
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import org.rut.util.algorithm.SortUtil; O:RPH{D
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/** 8=T;R&U^M
* @author treeroot pQ*9)C
* @since 2006-2-2 %]>c4"H
* @version 1.0 WhSQ>h!@s
*/ 0X`Qt[
public class MergeSort implements SortUtil.Sort{ u=jF\W9
9]VUQl9gh
/* (non-Javadoc) ~kYUp5f
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;)5d
wq
*/ X7{ueP#L
public void sort(int[] data) { z*YkD"]B
int[] temp=new int[data.length]; 1s=M3m&H
mergeSort(data,temp,0,data.length-1); q0.+ F4
} X(?.*m@+TB
d[w 'j/{
private void mergeSort(int[] data,int[] temp,int l,int r){ B1JdkL 3h
int mid=(l+r)/2; 0lF[N.!\9
if(l==r) return ; 4!d&Zc>C4
mergeSort(data,temp,l,mid); Q{UR3U'Q
mergeSort(data,temp,mid+1,r); 26yv w
for(int i=l;i<=r;i++){ 234OJ?
temp=data; j@v*q\X&
} IaH8#3+a
int i1=l; C&,&~^_F
int i2=mid+1; #!OCEiT_
for(int cur=l;cur<=r;cur++){ KFdV_e5lU
if(i1==mid+1) nyi}~sB
data[cur]=temp[i2++]; Av^{$9yl
else if(i2>r)
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data[cur]=temp[i1++]; h$DFp
else if(temp[i1] data[cur]=temp[i1++]; OlK3xdg7
else ~+A?!f;-J
data[cur]=temp[i2++]; 2Auhv!xV
} gtyo~f
} I(#Y\>DG
Z2(z,pK
} pB&3JmgR$)
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改进后的归并排序: _:Tjq)
M3o dyO(
package org.rut.util.algorithm.support; BZ">N
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import org.rut.util.algorithm.SortUtil; 4v33{sp
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/**
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* @author treeroot 3DV';
* @since 2006-2-2 .|JJyjRA+
* @version 1.0 v98=#k!F
*/ Mhm3u
public class ImprovedMergeSort implements SortUtil.Sort { }\:3}'S.$
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private static final int THRESHOLD = 10; 1Zx|SBF
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/* \-0@9E<D
* (non-Javadoc) `L`qR,R
* Ah;2\0|t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^G[xQcM73
*/ -X'HZ\)
public void sort(int[] data) { bvuoGG*
int[] temp=new int[data.length]; gYA|JFi
mergeSort(data,temp,0,data.length-1); &8_]omuNV
} ]iRE^o6
|Up+Kc:z/n
private void mergeSort(int[] data, int[] temp, int l, int r) {
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int i, j, k; 8B JxD<
int mid = (l + r) / 2; J_C<Erx[O
if (l == r) (8TB*BhQ_
return; NKvBNf|D
if ((mid - l) >= THRESHOLD) =${]j
mergeSort(data, temp, l, mid); h$)(-_c3
else ah1d0eP
insertSort(data, l, mid - l + 1); }=z_3JfO
if ((r - mid) > THRESHOLD) 'C8VD+p
mergeSort(data, temp, mid + 1, r); "=@b>d6U+
else n .ZLR=P4
insertSort(data, mid + 1, r - mid); 8>x!n/z)
'3 w=D
)
for (i = l; i <= mid; i++) { "^F#oo%L
temp = data; NeAkJG=<
} j2c -01}
for (j = 1; j <= r - mid; j++) { S_/9eI~X
temp[r - j + 1] = data[j + mid]; <`i"5`J
} 15+>W4v
int a = temp[l]; |!E>I
int b = temp[r]; dqnH7okZ
for (i = l, j = r, k = l; k <= r; k++) { y >r7(qg
if (a < b) { z}.y
?#
data[k] = temp[i++]; lqn7$
a = temp; Umjt~K^Z
} else { 0vuL(W8)
data[k] = temp[j--]; RbzSQr>a\
b = temp[j]; /:3:Ky3
} 0?KXQD
} -G e5gQ=
} rZ2X$FO@
b6:A-jb*I
/** PElC0qCn[
* @param data <cNXe4(
* @param l P?p>'avP
* @param i 'bJ!~ML&
*/ _*7h1[,{f
private void insertSort(int[] data, int start, int len) { rl4B(NZi}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7zXFQ|TP
} v#0F1a?]D
} 8^\}\@
} {STOWuY
} h6<abT@I
.)
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堆排序: B4 yU}v
*GleeJWz
package org.rut.util.algorithm.support; |x@)%QeC
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import org.rut.util.algorithm.SortUtil; NAjY,)>'K
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/** Rt:k4Q
* @author treeroot Yv k
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* @since 2006-2-2 [zv>Wlf,%
* @version 1.0 !l|vO(
*/ 2_ M+akqy^
public class HeapSort implements SortUtil.Sort{ rqW[B/a{
Ls{z5*<FM
/* (non-Javadoc) b&[9m\AX`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aSdh5?
*/ HeABU(o4
public void sort(int[] data) { !>fYD8Ft,
MaxHeap h=new MaxHeap(); yTzP{I
h.init(data); LOQoi8j
for(int i=0;i h.remove(); c.-h'1
System.arraycopy(h.queue,1,data,0,data.length); A}WRpsA9
} _a1 =?
WA}<Zme3[
private static class MaxHeap{ OzY55
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void init(int[] data){ mkgGX|k;
this.queue=new int[data.length+1]; 6hDK;J J&
for(int i=0;i queue[++size]=data; b?9c\-}
fixUp(size); o#3?")>|
} y_EkW
f
} uw!
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private int size=0; u$ [R>l9
+13h*
private int[] queue; MJNY#v3
:K.%^ag=j
public int get() { R}Pw#*B
return queue[1]; zvjVM"=G
} 0q'd }D W
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public void remove() { rMXIw
SortUtil.swap(queue,1,size--); ,:g.B\'Q
fixDown(1); $$ %4,\{l
} y_O [r1MF
file://fixdown 5tPBTS<<"L
private void fixDown(int k) { K$OxeJP?F
int j; -c-af%xD
while ((j = k << 1) <= size) { . K`OEdr<
if (j < size %26amp;%26amp; queue[j] j++; wKF #8Y
if (queue[k]>queue[j]) file://不用交换 -
s[=$pDU
break; Gr9/@U+
SortUtil.swap(queue,j,k); vSty.:bY\p
k = j; X"WKgC g$
} T=r-6eN
} r=GF*i[3
private void fixUp(int k) { q/y4HT,x
while (k > 1) { MuNM)pyxp
int j = k >> 1; #qkokV6`
if (queue[j]>queue[k]) ZeewGa^r
break; A4LGF
SortUtil.swap(queue,j,k); Z$qFjWp
k = j; 3t<XbHF9
} U'^AJ2L8
} +5J "G/f
'J^ M`/
} bwh7.lDAl
kN3 T/96
} tP; &$y.8
)|;*[S4
SortUtil: yMdEH-?/
`$og]Dn;
package org.rut.util.algorithm; zNSix!F
iVq4&X_x
import org.rut.util.algorithm.support.BubbleSort; WrK!]17or
import org.rut.util.algorithm.support.HeapSort; rZRcy9$y>
import org.rut.util.algorithm.support.ImprovedMergeSort; eXJt9olI
import org.rut.util.algorithm.support.ImprovedQuickSort; >!+.M9
import org.rut.util.algorithm.support.InsertSort; xlPUum-o
import org.rut.util.algorithm.support.MergeSort; TDI8L\rr
import org.rut.util.algorithm.support.QuickSort; wMy$T<:
import org.rut.util.algorithm.support.SelectionSort; 6#~"~WfPQ
import org.rut.util.algorithm.support.ShellSort; &`>[4D*
#Mo`l/Cwp
/** n8(B%KF
* @author treeroot p7(Pymkd
* @since 2006-2-2 '\%c"?
* @version 1.0 V:F;Nq%+j
*/ w0QN5?
public class SortUtil { wX}N===
public final static int INSERT = 1; ;\`~M
public final static int BUBBLE = 2; Enee\!@v
public final static int SELECTION = 3; ~;St,Fw<<
public final static int SHELL = 4; +EJwWDJ!%
public final static int QUICK = 5; #PnuR2s7.
public final static int IMPROVED_QUICK = 6; S,T?(lSl
public final static int MERGE = 7; }* iag\
public final static int IMPROVED_MERGE = 8; ?wE@9g A
public final static int HEAP = 9; Zu(eYH=Q
8@%Xd^
public static void sort(int[] data) { j,Sg?&"%=
sort(data, IMPROVED_QUICK); [c4.E"
} :V2"<]
private static String[] name={ `-zdjc d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *]2LN$
}; $>E\3npV
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private static Sort[] impl=new Sort[]{ qGMM3a)Q
new InsertSort(), ';`fMcN
new BubbleSort(), Ke-Q>sm2Q
new SelectionSort(), M0!;{1
new ShellSort(), +3.Ik,Z}zq
new QuickSort(), N[4v6GS
new ImprovedQuickSort(), }HS:3Dt
new MergeSort(), ?]gZg[
new ImprovedMergeSort(), @C)O[&Sk
new HeapSort() lhg3
}dW
}; Li ,B,
E_&Hje|J_[
public static String toString(int algorithm){ ".L+gn}u-
return name[algorithm-1]; 9fD4xkRS
} )/k0*:OMyO
0z?b5D;
public static void sort(int[] data, int algorithm) { QFoZv+|
impl[algorithm-1].sort(data); n<MMO=+bg
} XfA3Ez,}
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public static interface Sort { 3_=~7B)
8
public void sort(int[] data); CCKg,v
} WtI1h `Fo
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public static void swap(int[] data, int i, int j) { :QgC Zq
int temp = data; Mq) n=M
data = data[j]; R_h(Z{d
data[j] = temp; E
[JXQ76
} m1_?xU
} N_<sCRd]9