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。 Hj!)S&y,$
插入排序: jz)H?UuDY
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package org.rut.util.algorithm.support; ,uv$oP-
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import org.rut.util.algorithm.SortUtil; --9mTqx
/** =%3nKSg
* @author treeroot _=8+_OEk
* @since 2006-2-2 X=3@M_Jzo
* @version 1.0 #^9;<@M
*/ cC4T3]4l'
public class InsertSort implements SortUtil.Sort{ Zx_m?C_2_
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/* (non-Javadoc) ff#-USK^R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cabN<a
l
*/ ^6+x0[13
public void sort(int[] data) { #jX>FXo
int temp; @I&"P:E0F;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); xeI{i{8
} ;i9CQ0e?
} a3;.{6el)H
} V|AE~R^
}$-VI\96
} MjpJAV/84
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冒泡排序: =CoT{LRQ_
'm|m+K83
package org.rut.util.algorithm.support; gNwXOd u
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import org.rut.util.algorithm.SortUtil; o$O,#^
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/** GHy#D]Z
* @author treeroot 'T[zh#v>S
* @since 2006-2-2 kgz{m;R
* @version 1.0 G)&'8W F5o
*/ qx)k1 QY
public class BubbleSort implements SortUtil.Sort{ o(P:f)B
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/* (non-Javadoc) g1~I*!p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hptuTBD
*/ PlZiTP
public void sort(int[] data) { K_QCYS.
int temp; [Ni4[\
for(int i=0;i for(int j=data.length-1;j>i;j--){ Y9;Mey*oW
if(data[j] SortUtil.swap(data,j,j-1); ?_aR-[XRg
} spJ(1F{|V
} I*}#nY0+
} C t)MvZ
} sh ;uKzQ
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} >K
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选择排序: ?N*0S'dY
QCR-l xO1
package org.rut.util.algorithm.support; !9,
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import org.rut.util.algorithm.SortUtil; 0>iFXw:fn
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/** U[b;#Y1X
* @author treeroot _m],(J=,z
* @since 2006-2-2 )\-";?sYky
* @version 1.0 (L$~zw5gr
*/ |8 bO5l:
public class SelectionSort implements SortUtil.Sort { @@IA35'tc
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/* Wq(l :W'
* (non-Javadoc) R`2A-c
* L]d@D0.Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N;'HR)
*/ s.` d<(X?
public void sort(int[] data) { T3./V0]\I
int temp; 8[)]3K x
for (int i = 0; i < data.length; i++) { vo(NB
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int lowIndex = i; |QLX..
for (int j = data.length - 1; j > i; j--) { aMQjoamz
if (data[j] < data[lowIndex]) { A Vm{#^p[(
lowIndex = j; N?;o_^C
} `mjx4Lb
} 7[g;|(G0
SortUtil.swap(data,i,lowIndex); rxj@NwAno
} ).C!
} Wk\@n+Q{]
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} T[-c|
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Shell排序: q9Sz7_K
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package org.rut.util.algorithm.support; 1?|6odc
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import org.rut.util.algorithm.SortUtil; 9K':Fn2,
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/** j yRSEk$
* @author treeroot =nx:GT3&[
* @since 2006-2-2 -'[(Uzj
* @version 1.0 Wi[m`#
*/ -I-Uh{)j
public class ShellSort implements SortUtil.Sort{ *3O >J"
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/* (non-Javadoc) =kh>s$We
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1Xr"h:U_X
*/ u\R`IZ&O
public void sort(int[] data) { lhoq3A
for(int i=data.length/2;i>2;i/=2){ d-;9L56{P
for(int j=0;j insertSort(data,j,i); .l+~)$
} d:hL
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} sD8m<
insertSort(data,0,1); NOr
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}
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/** qzA]2'~Q
* @param data 8ts+'65|F
* @param j vA"niO
* @param i \c~{o+UD-
*/ knOnUU
private void insertSort(int[] data, int start, int inc) { ,p!B"#
ot
int temp; -
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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); ~sIGI?5f
} [z% ?MIT
} zk5=Opmvh
} "6N~2q,SW
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} s`=/fvf.
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快速排序: MJ*]fC3/
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package org.rut.util.algorithm.support; oU0
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import org.rut.util.algorithm.SortUtil; ;DD>k bd
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/** >u5g?yzw
* @author treeroot 58&{5YpS
* @since 2006-2-2 qX{X4b$
* @version 1.0 ?#m<\]S<
*/ AL]h|)6QpC
public class QuickSort implements SortUtil.Sort{ pSQCT
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/* (non-Javadoc) a,~D+s;^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) sr+gD*@h
*/ 5BHOHw D{
public void sort(int[] data) {
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quickSort(data,0,data.length-1); 3G%wZ,)C
} |'c4er/;#
private void quickSort(int[] data,int i,int j){ ?Z Rkn+;
int pivotIndex=(i+j)/2; e(~'pk"mZ
file://swap :YqQlr\
SortUtil.swap(data,pivotIndex,j); LiZdRr
kxm:g)`=[
int k=partition(data,i-1,j,data[j]); 1GG>.RCP
SortUtil.swap(data,k,j); ^r>f2 x
if((k-i)>1) quickSort(data,i,k-1); x^)g'16`
if((j-k)>1) quickSort(data,k+1,j); ^p 2.UW
g={]Mzh
} N&fW9s}
/** *O+R|Cdp/
* @param data >;
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* @param i PNbcy!\U
* @param j #9D/jYK1X
* @return *#lBQBH|.
*/ @%OPy|=,{
private int partition(int[] data, int l, int r,int pivot) { & =73D1A
do{ X<~k =qwA
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 7-".!M
SortUtil.swap(data,l,r); 6[*;M
} 4[TS4p
while(l SortUtil.swap(data,l,r); VyecTU"W
return l; C5es2!^-]O
} K/vxzHSl
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} q Vm"f,ruo
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改进后的快速排序: =`qRu
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package org.rut.util.algorithm.support; #)^^_
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import org.rut.util.algorithm.SortUtil; rH$eB/#F
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/** uW}Hvj;0a*
* @author treeroot URYZV8=B~
* @since 2006-2-2 q.=^iz&m
* @version 1.0 =oE_.ux\
*/ 5LQk8NPh
public class ImprovedQuickSort implements SortUtil.Sort { JFkN=YR8
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private static int MAX_STACK_SIZE=4096; :7p9t.R<$h
private static int THRESHOLD=10; UrO=!G k
/* (non-Javadoc) [D3+cDph
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bz{^ h'
*/ #V.ZdLo(
public void sort(int[] data) { PXw|
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int[] stack=new int[MAX_STACK_SIZE]; [ rQMD^:M$
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int top=-1; C=N!z
int pivot; ^Xs%.`Gv/
int pivotIndex,l,r; )|y#OZHR
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stack[++top]=0; $!!R:Wn/R
stack[++top]=data.length-1; \U/v;Ijf
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while(top>0){ ,~(|p`
int j=stack[top--]; QVIcb;&:}
int i=stack[top--]; C,o:
A LXUaE.
pivotIndex=(i+j)/2; Q |
pivot=data[pivotIndex]; ,{k<JA{
~?#~ Ar
SortUtil.swap(data,pivotIndex,j); 8r,9OM
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file://partition -=>sTMWpr
l=i-1; Hx$.9'Oq\Q
r=j; L-#e?Y}$J
do{ (O$}(Tn
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); D =$4/D:;
SortUtil.swap(data,l,r); }@d>, 1DU
} pe|X@o
while(l SortUtil.swap(data,l,r); 'gCJ[ ce
SortUtil.swap(data,l,j); gs?8Wzh90*
:'Zx{F`
if((l-i)>THRESHOLD){ LU%#mY
stack[++top]=i; c$9sF@K?
stack[++top]=l-1; R7lYu\mA
} WFouoXlG0
if((j-l)>THRESHOLD){ Te# ]Cn|
stack[++top]=l+1; PPEq6}
stack[++top]=j; >-!r9"8@
} +A@m9
lbRzx4=\y
} {$;2HbM(
file://new InsertSort().sort(data); @B?FE\
insertSort(data); _ w/_(k
} tl|ijR
/** w4UD/zO
* @param data >w9sE8i
*/ Q| ?'(J+
private void insertSort(int[] data) { W!t{rI7 2
int temp; iQqqs`K
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); tww=~!
} $]C=qM28-
} wh%xkXa[ur
} lr,q{;
Z:!IX^q;}n
} Mm5c8[
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归并排序: cS4DN
x|8^i6xB
package org.rut.util.algorithm.support; .46#`4av
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import org.rut.util.algorithm.SortUtil; }MP>]8Aq
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/** )IHG6}<
* @author treeroot Nb0Ik/:<
* @since 2006-2-2 O$^xkv5.
* @version 1.0 OZf6/10O/
*/ Zae.MO^C!
public class MergeSort implements SortUtil.Sort{ k0JW[04j
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/* (non-Javadoc) %)?`{O~ h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @Gt`Ds9=
*/ V@[rf<,
public void sort(int[] data) { m^<p8KZ
int[] temp=new int[data.length]; :5J_5,?;`
mergeSort(data,temp,0,data.length-1); p}uncIod
} pr_>b`p6
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private void mergeSort(int[] data,int[] temp,int l,int r){ eeM?]J-
int mid=(l+r)/2; 8] `Ru5nd
if(l==r) return ; / 2xSNalC
mergeSort(data,temp,l,mid); :|rPT)yT]
mergeSort(data,temp,mid+1,r); )n>+m|IqY(
for(int i=l;i<=r;i++){ cMaOM}mS
temp=data; 7\Co`J>p2
} ,[* ;UR
int i1=l; *$S#o#5
int i2=mid+1; ^ *0'\/N&
for(int cur=l;cur<=r;cur++){ <`)iA-Df;9
if(i1==mid+1) L_Q S0_1
data[cur]=temp[i2++]; (!3;X"l
else if(i2>r) BgM%+b8u
data[cur]=temp[i1++]; -}P7$|O&
else if(temp[i1] data[cur]=temp[i1++]; ]W/>Ldv
else 9gy(IRGq/
data[cur]=temp[i2++]; le8 #Z}p
} 2Q@Y^t
} y \D=Z
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} 1Ipfw
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改进后的归并排序: D<>@
%"%
XRxj W
package org.rut.util.algorithm.support; `:p1&OS
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import org.rut.util.algorithm.SortUtil; |
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/** _[t8rl
* @author treeroot ?T!)X)A#
* @since 2006-2-2 yz8jU*H
* @version 1.0 $,ikv?"L
*/ 4t*so~
public class ImprovedMergeSort implements SortUtil.Sort { 2: SO_O4C
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private static final int THRESHOLD = 10; '#.#$8l
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/* 0
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* (non-Javadoc) Hr^3`@}#1
* g9~]s9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pDl3!m
*/ D=+NxR[
public void sort(int[] data) { IeP
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int[] temp=new int[data.length]; TB!(('
mergeSort(data,temp,0,data.length-1); T^:fn-S}=
} 4CrLkr
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private void mergeSort(int[] data, int[] temp, int l, int r) { `\CVV*hP
int i, j, k; SwW['c'*]B
int mid = (l + r) / 2; b?T
if (l == r) oyvKag
return; n}?wVfEy
if ((mid - l) >= THRESHOLD) \)/yC74r7(
mergeSort(data, temp, l, mid); !5Sd2<N
else y >+mc7n
insertSort(data, l, mid - l + 1); ?!'ZfQ:zK
if ((r - mid) > THRESHOLD) Nd@~>&F
mergeSort(data, temp, mid + 1, r); Ef)yQ
else *F`A S>
insertSort(data, mid + 1, r - mid); "@/62b
-LW[7s$
for (i = l; i <= mid; i++) { g[[;w*;z
temp = data; Ii&7rdoxe
} t:)ERT")
for (j = 1; j <= r - mid; j++) { e<cM[6H'D
temp[r - j + 1] = data[j + mid]; !.TLW
} +>\id~c(
int a = temp[l]; MTOy8 Im
int b = temp[r]; 1:M@&1LYp
for (i = l, j = r, k = l; k <= r; k++) { 2%u;$pj
if (a < b) { V[nQQxWp=
data[k] = temp[i++]; T~4N+fK
a = temp; Qk1xUE
} else { hA1-){aw3q
data[k] = temp[j--]; .(CP. d
b = temp[j]; /i]y$^
} 8}s.Fg@tE
} Qf $|_&|
} x@Hd^xH`
cC'x6\a
/** yR;{
* @param data Y>+y(ck
* @param l N!2Rl
* @param i U#&7p)4(
*/ Ch \&GzQ
private void insertSort(int[] data, int start, int len) { m3<+yz$!r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); oXXC@[??}N
} 2*iIjw3g
} $*R/tJ.
} T~_/Vi
} uxaYCa?
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堆排序: A:l@_*C..
H<EQu|f&x
package org.rut.util.algorithm.support; k%]=!5F
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import org.rut.util.algorithm.SortUtil; 9ZXlR?GA
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/** }a
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* @author treeroot ig}A9j?]
* @since 2006-2-2 \p{5D`HY
* @version 1.0 \*f;X aa
*/ e[_m<e
public class HeapSort implements SortUtil.Sort{ qMt++*Ls
R:Q0=PzDi#
/* (non-Javadoc) L2Pujk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uvP2Wgt
*/ YjOs}TD lx
public void sort(int[] data) { Rp7ntI:
MaxHeap h=new MaxHeap(); rE9I>|tX
h.init(data); 5NoI~X=
for(int i=0;i h.remove(); /zDi9W*~1
System.arraycopy(h.queue,1,data,0,data.length); }v:jncp
} %wcSM~w
:+Om]#`Vls
private static class MaxHeap{ :0& X^]\
z4M9M7)"
void init(int[] data){ h\v'9
this.queue=new int[data.length+1]; ,to+oSZE
for(int i=0;i queue[++size]=data; Tm_B^W}
fixUp(size); b2b?hA'k
} <Rh6r}f
} !l]dR@e
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private int size=0; &nBa=Enf
J]f3CU,<N
private int[] queue; e@:sR
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public int get() { l2N]a9bq@
return queue[1]; iY"l}.7)
} \%^%wXfp
]BR,M4
public void remove() { sVG(N.y
SortUtil.swap(queue,1,size--); =] *.ZH#h
fixDown(1); mU}F!J#6
} 4jD2FFG-
G
file://fixdown {43>m)8+
private void fixDown(int k) { Y%`xDI
int j;
Uf}\p~;
while ((j = k << 1) <= size) { C4TE-OM8
if (j < size %26amp;%26amp; queue[j] j++; s(X;Eha
if (queue[k]>queue[j]) file://不用交换 P(F+f`T
break; |$5[(6T|
SortUtil.swap(queue,j,k); 3U_2! zF3_
k = j; a7N!B' y
} 3Zi@A4Wu
} k'0Pi6
private void fixUp(int k) { -B86U6^s
while (k > 1) { ^%O]P`$
int j = k >> 1; xhcK~5C
if (queue[j]>queue[k]) \=_{na_
break; Y ')x/H
SortUtil.swap(queue,j,k); 0}_[DAd6
k = j; giz7{Ai
} qucq,Yw
} x c{hC4^V
x?&$ ci
} Q7W>qe%4
GnvL'ESa@M
} bw\@W{a%q
O)vp~@|
SortUtil: b0oMs=uBn
C*P7-oE2rh
package org.rut.util.algorithm; B(M6@1m_
..rOsg{
import org.rut.util.algorithm.support.BubbleSort;
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import org.rut.util.algorithm.support.HeapSort; n=[/Z!
import org.rut.util.algorithm.support.ImprovedMergeSort; Yk=PS[f
import org.rut.util.algorithm.support.ImprovedQuickSort; 7hsGu a
import org.rut.util.algorithm.support.InsertSort; hdrm!aBd
import org.rut.util.algorithm.support.MergeSort; hP15qKy
import org.rut.util.algorithm.support.QuickSort; W*2U="t
import org.rut.util.algorithm.support.SelectionSort; |P%Jw,}]9
import org.rut.util.algorithm.support.ShellSort; }sxYxn~
%n*-VAfE\
/** D-c`FG'
* @author treeroot 'q`^3&E
* @since 2006-2-2 cFJY^A
* @version 1.0 E~6c -Lw
*/ vh$%9ed
public class SortUtil { %f]:I
public final static int INSERT = 1; <_7*67{
public final static int BUBBLE = 2; P'_H/r/#
public final static int SELECTION = 3; 0\e IQp
public final static int SHELL = 4; wp&=$Aa)'
public final static int QUICK = 5; 9g<7i
public final static int IMPROVED_QUICK = 6; =zz~kon9
public final static int MERGE = 7; #"B\UN
public final static int IMPROVED_MERGE = 8; ^jx7@LgS=
public final static int HEAP = 9; P?k0zwOlBl
]UmFhBR-
public static void sort(int[] data) { sIy^m}02
sort(data, IMPROVED_QUICK); >6?__v]9G
} ,k;^G><
=
private static String[] name={ [EKQR>s)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RNe^;
B
}; 76`8=!]R
}9FSO9*&}
private static Sort[] impl=new Sort[]{ 3U0`,c\ao*
new InsertSort(), [C'JH//q*t
new BubbleSort(), ?U2<
new SelectionSort(), 3qf
Ym}d
new ShellSort(), r [*Vqcz
new QuickSort(), <_-hRbS
new ImprovedQuickSort(), ~Yy>zUH^X
new MergeSort(), bJX)$G
new ImprovedMergeSort(), ,=[?yJy
new HeapSort() `9BROZnq
}; o6uJyCO
~GZY 5HF
public static String toString(int algorithm){ ):[7E(F=
return name[algorithm-1]; H["`Mn7j2
} MB~=f[cUnd
A|<jX}
public static void sort(int[] data, int algorithm) { C@'h<[v`1v
impl[algorithm-1].sort(data); 7Mg=b%IYs
} ci?qT,&
0|{u{w@!`
public static interface Sort {
@fl-3q
public void sort(int[] data); ~
Q. 7VDz
} bAx-"Lu
SMpH._VFeE
public static void swap(int[] data, int i, int j) { zo4qG+>o
int temp = data; Y!nJg1
data = data[j]; 3`t%g[D1
data[j] = temp; PoxK{Y
} ^rifRY-,yO
} xe^Gs]fm