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。 4"kc(J`c
插入排序: klnNBo!
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package org.rut.util.algorithm.support; ]pBEoktp
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import org.rut.util.algorithm.SortUtil; e:nByzdH0[
/** hRX9Du`$
* @author treeroot y,`n9[$K\
* @since 2006-2-2 #~nXAs]Q
* @version 1.0 Ve%ua]qA
*/ ~Ze!F"
public class InsertSort implements SortUtil.Sort{ xaVX@ 3r.3
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/* (non-Javadoc) !7I07~&1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "zJ xWXI
*/ 8%m\J:eR
public void sort(int[] data) { aUZ?Ue9l>2
int temp; lqOpADLS3
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); wi7Br&bGi
} T90O.]S
} eUQmW^
} 8A&N+sT
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} }||p#R@?
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冒泡排序: ;%2+Tc-7I
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package org.rut.util.algorithm.support; *uRDB9#9,
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import org.rut.util.algorithm.SortUtil; 5*Zz_ .
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/** WuY#Kx~2
* @author treeroot ~3j+hN8<
* @since 2006-2-2 5A`>3w{3n
* @version 1.0 [>?|wQy >=
*/ ^2Cqy%x-
public class BubbleSort implements SortUtil.Sort{ W?zj^y[w
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/* (non-Javadoc) 6Zn[l,\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >l)x~Bkf$j
*/ n$SL"iezW?
public void sort(int[] data) { _@XueNU1hS
int temp; ,0h{RZKw
for(int i=0;i for(int j=data.length-1;j>i;j--){ liPrxuP`
if(data[j] SortUtil.swap(data,j,j-1); &2 Yo
} N*Q*>q
} >g!$H}\
} `;}qjm0a
} k8stXW-w
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} Kn$E{ F\
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选择排序: h!(#
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package org.rut.util.algorithm.support; =3'B$PY
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import org.rut.util.algorithm.SortUtil; wS|k3^OV%
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/** WP\kg\o
* @author treeroot cLL2
'
* @since 2006-2-2 J)Yz@0#T(;
* @version 1.0 2<J2#}+\
*/ D]iyr>V6'
public class SelectionSort implements SortUtil.Sort { y{(Dv}
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/* ckFPx l.
* (non-Javadoc) |qQ6>IZ
* qmnl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "kcix!}&
*/ 6rE8P#
public void sort(int[] data) { :yJ#yad
int temp; jt6_1^
for (int i = 0; i < data.length; i++) { w]xr
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int lowIndex = i; |a7Kn/[`,
for (int j = data.length - 1; j > i; j--) { 90abA,U@
if (data[j] < data[lowIndex]) { $HOe){G
lowIndex = j; A?n5;mvq#
} oc-&}R4=
} `Zmdlp@
SortUtil.swap(data,i,lowIndex); =YO<.(Lu
} s^PsA9EAn
} ,tZL"
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} KIY`3Fl09
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Shell排序: mBye)q$
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package org.rut.util.algorithm.support; L"1AC&~u
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import org.rut.util.algorithm.SortUtil; WaX!y$/z
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/** D{d%*hlI 3
* @author treeroot p {.6
* @since 2006-2-2 aEa.g.SZ
* @version 1.0 >@G"*le*)
*/ (8ct'Q ;
public class ShellSort implements SortUtil.Sort{ k&[6Ld0~56
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/* (non-Javadoc) mcQ
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iSOyp\E|
*/ op-\|<i
public void sort(int[] data) { ql5&&e=-
for(int i=data.length/2;i>2;i/=2){ 7nxH>.,Q>
for(int j=0;j insertSort(data,j,i); q3v5gz^t
} 7zN7PHT=$t
} 8yOhKEPX
insertSort(data,0,1); uTO%O}D N
} <7Yh<(R e^
fWIWRsy%
/** OqH3.@eK
* @param data -~J5aG[@~>
* @param j rR{KnM
* @param i PD^ 6Ywn>s
*/ !H)!b#_
private void insertSort(int[] data, int start, int inc) { SuI^8^f=
int temp; f#I#24)RH
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); `25<;@
} ][//G|9
} ?Ec{%N%
} ^HuB40
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} e^;:iJS
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快速排序: [ gR,nJH.
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package org.rut.util.algorithm.support; ;5T}@4m|r
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import org.rut.util.algorithm.SortUtil; spQr1hx<
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/** y=
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* @author treeroot &Wdi
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* @since 2006-2-2 B=r+
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* @version 1.0 ,|#biT-<T
*/ |RXXj [z
public class QuickSort implements SortUtil.Sort{ \fvm6$ rZ^
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/* (non-Javadoc) H|`D3z.c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ix(,gDN
*/ EKQ>hww8
public void sort(int[] data) { %'X7T^uE
quickSort(data,0,data.length-1); 96; gzG@1!
} Cd6th
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private void quickSort(int[] data,int i,int j){ @S5HMJ2=
int pivotIndex=(i+j)/2; bl10kI:F
file://swap r/)ZKO,
SortUtil.swap(data,pivotIndex,j); NCo!n$O1~
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int k=partition(data,i-1,j,data[j]); xd"+ &YT
SortUtil.swap(data,k,j); Bk5 ELf8pL
if((k-i)>1) quickSort(data,i,k-1); _2<UcC~
if((j-k)>1) quickSort(data,k+1,j); ~GJ;;v1b2
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} ^e$!19g
/** ?Ycl!0m
* @param data S
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* @param i ]vV)$xMX
* @param j x",ktE>9
* @return oe<@mz/
*/ 6p&uifY}tR
private int partition(int[] data, int l, int r,int pivot) { MIiBNNURX
do{ 7.)_H
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); O OABn*
SortUtil.swap(data,l,r); f|/ ,eP$
} Qs#;sy
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while(l SortUtil.swap(data,l,r); ;v.J
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return l; @FF{lK?[
} P)Oe?z;G?
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} /3sX>Rj
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改进后的快速排序: XVo+ <&
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package org.rut.util.algorithm.support; 1M55!b
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import org.rut.util.algorithm.SortUtil; z/p^C~|}
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/** ,I]]52+?4
* @author treeroot VP~%,=
* @since 2006-2-2 O@dK^o
* @version 1.0 Ul 85-p
*/ iO18FfM_
public class ImprovedQuickSort implements SortUtil.Sort { YV>&v.x0;
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private static int MAX_STACK_SIZE=4096; qwn EVjf
private static int THRESHOLD=10; Dk2Zl
/* (non-Javadoc) jJ'NYG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X%B$*y5
*/ 7*WO9R/
public void sort(int[] data) { tuY=)?
int[] stack=new int[MAX_STACK_SIZE]; 7;r3Bxa
Q
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int top=-1; O9ro{ k
int pivot; e(&u3 #7Nn
int pivotIndex,l,r; %t74*cX
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stack[++top]=0; T@zp'6\H
stack[++top]=data.length-1; 8f%OPcr&
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while(top>0){ :DuEv:;v
int j=stack[top--]; :w4N*lV-
int i=stack[top--]; J^PFhu
*;F<Q!i&v
pivotIndex=(i+j)/2; z fy(j
pivot=data[pivotIndex]; f^IB:e#j;
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SortUtil.swap(data,pivotIndex,j); a6It1%a+
[' iEw!
file://partition ^![7X'!;pt
l=i-1; i!(5y>I_
r=j; xsS;<uCD
do{ 2jkma :$'
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 4((p?jbC
SortUtil.swap(data,l,r); :RBeq,QaO
} ;Cty"H,
while(l SortUtil.swap(data,l,r); t9lf=+%s
SortUtil.swap(data,l,j); ]j$(so"
j*GS')Cm
if((l-i)>THRESHOLD){ Kf,AnKkn'
stack[++top]=i; i;IhsKO0R
stack[++top]=l-1; 0|=y#`;,Z
} /{I-gjovy
if((j-l)>THRESHOLD){ C?<-`$0
stack[++top]=l+1; 6 lEv<)cC
stack[++top]=j; M@*Y&(~
} GI:!,9
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} <R_)[{ 7
file://new InsertSort().sort(data); Jv]$@>#
insertSort(data); #nZPnc:
} cBZJ
/** cveQ6
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* @param data )N\ BC
*/ D& &71X '
private void insertSort(int[] data) { yGX5\PSo
int temp; hb}Qt Q
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); G2P:|R
} 53bVhPGv
} axN\ZXU
} Ufor>
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} @zLyG#kHY
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归并排序: 6
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package org.rut.util.algorithm.support; ^E+fmY2a
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import org.rut.util.algorithm.SortUtil; l2Rnyb<;;
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/** .>1Y-NM
* @author treeroot S{{wcH$n'i
* @since 2006-2-2 X7tBpyi
* @version 1.0 ::cI4D
*/ PZ?kv 4
public class MergeSort implements SortUtil.Sort{ EDF0q i
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/* (non-Javadoc) ?_T[]I'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M+lr [,c
*/ "2 :zWh7|
public void sort(int[] data) { 4<f^/!9w
int[] temp=new int[data.length]; e:T9f('
mergeSort(data,temp,0,data.length-1); |nqN95'u+]
} <B @z>V
W"A3$/nq^
private void mergeSort(int[] data,int[] temp,int l,int r){ _({wJ$aYC
int mid=(l+r)/2; nD!t*P
if(l==r) return ; U% ?+N
mergeSort(data,temp,l,mid); )/2TU]//
mergeSort(data,temp,mid+1,r); 4jjo%N
for(int i=l;i<=r;i++){ kD)]\
temp=data; \#F>R,
} E, oR.B
int i1=l; ^_W] @m2
int i2=mid+1; $)6M@S
for(int cur=l;cur<=r;cur++){ 4sC)hAx&f
if(i1==mid+1) 5Ux= 5a
data[cur]=temp[i2++]; -e0?1.A$
else if(i2>r) l701$>>
data[cur]=temp[i1++]; 7=qvu&{
else if(temp[i1] data[cur]=temp[i1++]; 2|NQ5OA0
else \zOsq5}
data[cur]=temp[i2++]; N-45LS@
} ' hdLQ\J
} @,LU!#y(
9eR";Wm])
} 8;,|z%rS"
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改进后的归并排序: n{M-t@r7
O.-A)S@
package org.rut.util.algorithm.support; J2Qt! -
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import org.rut.util.algorithm.SortUtil; lc]cs D
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/** ^)a j,U[
* @author treeroot 0}'/3Q
* @since 2006-2-2 a=6@} l1<
* @version 1.0 _!w69>Nj
*/ b.9[Vf_G
public class ImprovedMergeSort implements SortUtil.Sort { #wkSru&LS
b S' dXP
private static final int THRESHOLD = 10; ^SM5oK
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/* NW&2ca
* (non-Javadoc) D@]/%;
* "EE(O9q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V=YDqof
*/ <vb7X
public void sort(int[] data) { [*5hx_4%B
int[] temp=new int[data.length]; cxx8I
mergeSort(data,temp,0,data.length-1); @CoUFdbz
} +G,_|C2J
bXqTc2>=
private void mergeSort(int[] data, int[] temp, int l, int r) { &MB1'~Q,hq
int i, j, k; #nmh=G?\Sm
int mid = (l + r) / 2; 8>xd
if (l == r) pOhjq#}
return; `P$X`;SwE
if ((mid - l) >= THRESHOLD) +x~p&,w?
mergeSort(data, temp, l, mid); >\3N#S"PF
else ~ftR:F|9
insertSort(data, l, mid - l + 1); -M4VC^_
if ((r - mid) > THRESHOLD) ~(=5`9
mergeSort(data, temp, mid + 1, r); ='-/JH~
else y'z9Ya
insertSort(data, mid + 1, r - mid); /"^XrVi-
$I<\Yuy-M9
for (i = l; i <= mid; i++) { kv2 H3O
temp = data; c6iFha;db
} _x$\E
for (j = 1; j <= r - mid; j++) { W*,$0 t
temp[r - j + 1] = data[j + mid]; `BaJ >%|
} Kk|)N3AV:
int a = temp[l]; z f>(Y7M
int b = temp[r]; VJ1rU mO~
for (i = l, j = r, k = l; k <= r; k++) { (nYGN$qC9
if (a < b) {
@l&{ j
data[k] = temp[i++]; H;[?8h(
a = temp; OM`Ws5W}f
} else {
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data[k] = temp[j--]; PWO5R]
b = temp[j]; 6_:KFqc W
} _<l)4A3rS
} ~NO7@muw
} p<y\^a
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/** 8v=t-GJW
* @param data _:Jma
* @param l Sw>,Q-32
* @param i aY DM)b}
*/ H|'n|\{lt
private void insertSort(int[] data, int start, int len) { N(O*"1b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ^+kymZ
} omT^jh
} c_aj-`BKp
} #IJ6pg>K
} R~;8v1>K
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堆排序: <S12=<c?'
`1#Z9&bO
package org.rut.util.algorithm.support; o
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@ *5+ZAF
import org.rut.util.algorithm.SortUtil; |EY1$qItid
=<AG}by![
/** ~
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* @author treeroot WE+Szg(4x
* @since 2006-2-2 $^YHyfh
* @version 1.0 ?uW}
XAi
*/ 6.a|w}C`
public class HeapSort implements SortUtil.Sort{ vtc%MG1
J?1Eh14KZ
/* (non-Javadoc) AdzdYZiM_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fVi[mH0=+
*/ n-1
public void sort(int[] data) { n'1LNi
MaxHeap h=new MaxHeap(); .sb0|3&
h.init(data);
lk=[Xo
for(int i=0;i h.remove(); =6=l.qyYK
System.arraycopy(h.queue,1,data,0,data.length); Rhw+~gd*F
} %H3iX^}*
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private static class MaxHeap{ 3~LNz8Z*
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void init(int[] data){ sXY{g0%
this.queue=new int[data.length+1]; OD?y
for(int i=0;i queue[++size]=data; V5 Gy|X
fixUp(size); 4Vd[cRh2
} HaR x(p0
} Vw`%|x"Xz
yvnvI y
private int size=0; g3Ul'QJ
nk;+L
private int[] queue; K1o&(;l8G
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public int get() { fe}RmnAC
return queue[1]; kc2
8Q2
} ; NO#/
PH?<)Wj9i
public void remove() { ^}<]sjmk
SortUtil.swap(queue,1,size--); g9IIC5
fixDown(1); q35=_'\W
} <1`MjP*w
file://fixdown &7Xsn^opku
private void fixDown(int k) { xX8c>p
int j; MYVb !
while ((j = k << 1) <= size) { zv^+8h7k
if (j < size %26amp;%26amp; queue[j] j++; .73sY5hdTN
if (queue[k]>queue[j]) file://不用交换 yz)Nco]
break; [lzH%0
V
SortUtil.swap(queue,j,k); "Q{7X[$$^
k = j; bvT$/(7
} upq3)t_
} .mxc~
private void fixUp(int k) { \t? ;p-+ta
while (k > 1) { x@|10GC#:
int j = k >> 1; 8/~@3-9EK
if (queue[j]>queue[k]) T
^/\Rr
break; ;h#Q!M&e#
SortUtil.swap(queue,j,k); DP!8c
k = j; BM87f:d
} ho!qXS
} eGWwPSIp
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} ^xr &E
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} &C#?&AQ
B.);Ju
SortUtil: V]Uc@7S/
r]S"i$
package org.rut.util.algorithm; [5GzY`/m
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WM
import org.rut.util.algorithm.support.BubbleSort; tNAmA
import org.rut.util.algorithm.support.HeapSort; >=3oe.$)
import org.rut.util.algorithm.support.ImprovedMergeSort; q%XjJ -s:
import org.rut.util.algorithm.support.ImprovedQuickSort; |WgFLF~k
import org.rut.util.algorithm.support.InsertSort; yEVnG`
1
import org.rut.util.algorithm.support.MergeSort; GMpg+rK
import org.rut.util.algorithm.support.QuickSort; s|R`$+'{
import org.rut.util.algorithm.support.SelectionSort; k7 Ne(4P
import org.rut.util.algorithm.support.ShellSort; gj
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8
/** XFi9qL^
* @author treeroot 5K=>x<
* @since 2006-2-2 @2+'s;mUV
* @version 1.0 (62Sc]
*/ "rpP
public class SortUtil {
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public final static int INSERT = 1; NQN?CBFQ
public final static int BUBBLE = 2; QjTs$#eMW
public final static int SELECTION = 3; `b_n\pf]
public final static int SHELL = 4; jTqEV(
public final static int QUICK = 5; *(sv5c!0M8
public final static int IMPROVED_QUICK = 6; Y*S(uqM
public final static int MERGE = 7; Ls&-8
public final static int IMPROVED_MERGE = 8; 5 &]a8p{
public final static int HEAP = 9; _V3}F1?W
^+Vf*YY
8
public static void sort(int[] data) { iq5-eJmq
sort(data, IMPROVED_QUICK); P+rDln{
} 0aYoc-( A
private static String[] name={ )\{]4[9N
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {=+'3p
}; Z{_YH7_
\{o<-S;h
private static Sort[] impl=new Sort[]{ #_: %Yd
new InsertSort(), Yr>7c1FZi
new BubbleSort(), IkQ,#Bsb[
new SelectionSort(), WogCt,
new ShellSort(), t;t;+M|W
new QuickSort(), Iz!]LW
new ImprovedQuickSort(), )OFf nKh
new MergeSort(), = @lM*
new ImprovedMergeSort(), B06W(y,3Q>
new HeapSort() L(HAAqRnJ
}; !@FzP@
t]ID
public static String toString(int algorithm){ 9]g`VD6<v
return name[algorithm-1]; =V:Al
} 7<LCX{Uw
/7WdG)'
public static void sort(int[] data, int algorithm) { +_ $!9m
impl[algorithm-1].sort(data); N \woFrG
} Crezo?
26=G%F6
public static interface Sort { )p{,5"0u
public void sort(int[] data); 7_L$ XIa
} -E.fo._L5
:\%ZTBLL
public static void swap(int[] data, int i, int j) { g!`^!Q/($
int temp = data; 8,)<,g-/=
data = data[j]; QGnUPiD^
data[j] = temp; H^jcWwy:
} +[[^W;<.l
} wjHH%y