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。 zc-.W2"Hu
插入排序: e c`3Qw
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package org.rut.util.algorithm.support; /F 1mYq~
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import org.rut.util.algorithm.SortUtil; 3AD^B\<gB
/** tpi63<N
* @author treeroot "n@=.x
* @since 2006-2-2 iP JZ%
* @version 1.0 8[;U|SR"
*/ _nj?au(@`Y
public class InsertSort implements SortUtil.Sort{ fKAG+ t
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/* (non-Javadoc) `ja**re
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "-TIao#
*/
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public void sort(int[] data) { 52#@.Qa
int temp; s&$Zgf6Z
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); aOj5b>>
} X"{s"Mc0G
} U(=cGA.$
} -pR1xsG
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} 1]v.Qu<
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冒泡排序: rT
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package org.rut.util.algorithm.support; @cF
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import org.rut.util.algorithm.SortUtil; IXf@YV
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/** w_I}FPT<(:
* @author treeroot Aj4i}pT
* @since 2006-2-2 o^},L?
* @version 1.0 X Jy]d/
*/ _A\c 6#
public class BubbleSort implements SortUtil.Sort{ }T+pd#>
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/* (non-Javadoc) G?d28p',.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z6R<*$4
*/ }45&s9m=
public void sort(int[] data) { U:xr['
int temp; DP*[t8
for(int i=0;i for(int j=data.length-1;j>i;j--){ W 6~B~L
if(data[j] SortUtil.swap(data,j,j-1); 7@rrAs-"Z
} fN>o465I6
} j4Cad
} H6*d#!
} C
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} qGgT<Rd~1
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选择排序: e?G] fz
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package org.rut.util.algorithm.support; c0jC84*v
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import org.rut.util.algorithm.SortUtil; dM 7-,9Vc
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/** \ey3i((L
* @author treeroot t*^Q`V wQ
* @since 2006-2-2 +B%ZB9
* @version 1.0 nYMdYt04sl
*/ ^'C1VQ%
public class SelectionSort implements SortUtil.Sort { ;
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/* }S$]MY,*
* (non-Javadoc) !B(6
* m4|9p{E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A3 bE3Fk$
*/ uQ{ &x6.1
public void sort(int[] data) { 2rf-pdOvG
int temp; D'#Wc#b
for (int i = 0; i < data.length; i++) { 5+'1 :Sa(i
int lowIndex = i; Rg,pC.7;
for (int j = data.length - 1; j > i; j--) { _w=si?q
if (data[j] < data[lowIndex]) { 'cT R<LVo
lowIndex = j; 3ePG=^K^
} L*1C2EL/q
} PSNrY e
SortUtil.swap(data,i,lowIndex); &jf :7y
} ~k4S~!(U0
} ,)nO
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} Lu6!W
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Shell排序: k 0z2)3L
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package org.rut.util.algorithm.support; ZPY#<^WOzr
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import org.rut.util.algorithm.SortUtil; [L"(flY(E
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/** J O`S
* @author treeroot Lt.a@\J'_
* @since 2006-2-2 jX!,xS%(
* @version 1.0 ,D3?N2mB
*/ mHUQtGAVQ
public class ShellSort implements SortUtil.Sort{ Pp6(7j
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/* (non-Javadoc) vu;pILN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -S
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*/ P|_>M SO1'
public void sort(int[] data) { !&Vp5]c
for(int i=data.length/2;i>2;i/=2){ ,[%KSyH
for(int j=0;j insertSort(data,j,i); |#Bz&T
} M;,Q8z%
} ]i)m
insertSort(data,0,1); ,n}X,#]
} xg k~y,F
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/** a1_7plg
* @param data OW\r }
* @param j gh|TlvnA
* @param i m@R!o
*/ )Y+n4UL3NK
private void insertSort(int[] data, int start, int inc) { X<m#:0iD
int temp; [*Nuw_l
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); VChNDHiH
} )"2)r{7:
} U@!e&QPn
} +LCpE$H
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} Wqy|Y*$qT
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快速排序: >fJY
Lqb9gUJ:U
package org.rut.util.algorithm.support; #!l\.:h%
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import org.rut.util.algorithm.SortUtil; x}$SB%9/
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/** ) RS*MEgA
* @author treeroot 4R0'$Ld4
* @since 2006-2-2 A'HFpsa
* @version 1.0 Eq=~S O%
*/ //n$#c_}u
public class QuickSort implements SortUtil.Sort{ c"Ddw'?e
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/* (non-Javadoc) ov*?[Y7|~
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9&}$C]`
*/ sygxV
public void sort(int[] data) { /]zn8d
quickSort(data,0,data.length-1); %wWJVq}jx
} jT>G8}h
private void quickSort(int[] data,int i,int j){ ^<49NUB>
int pivotIndex=(i+j)/2; 3DRJl,v
file://swap z{Z4{&M
SortUtil.swap(data,pivotIndex,j); hkB/
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int k=partition(data,i-1,j,data[j]); #d2XVpO[0
SortUtil.swap(data,k,j); RC'4%++Nz
if((k-i)>1) quickSort(data,i,k-1); ^3"~
T
if((j-k)>1) quickSort(data,k+1,j); 9.u}<m
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} h|qTMwPr
/** R8|H*5T?+
* @param data @yp#k>
* @param i L/\s~*:M
* @param j ])F*)U
* @return *?bOH5$@Nw
*/ >G7dw1;
private int partition(int[] data, int l, int r,int pivot) { E/[>#%@i
do{ q@k/"ee*?
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); }z%fQbw
SortUtil.swap(data,l,r); tQ =3Oa[u
} 'EzKu~*
while(l SortUtil.swap(data,l,r); 'KvSI=$
return l; U )kl!
} >T84NFdz+
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} NULew]:5
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改进后的快速排序: _y:-_q
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package org.rut.util.algorithm.support; 9o%k [n
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import org.rut.util.algorithm.SortUtil; HiAj3
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/** )
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* @author treeroot 6Qtyv
* @since 2006-2-2 jW]Q-
* @version 1.0 BoJpf8e'-e
*/ bu0i#
public class ImprovedQuickSort implements SortUtil.Sort { atr0hmQ
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private static int MAX_STACK_SIZE=4096; +;r1AR1)x
private static int THRESHOLD=10; U]/iPG&_
/* (non-Javadoc) "x1?T+j4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Me;XG?`
*/ /q1k)4?E
public void sort(int[] data) { YV%y
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int[] stack=new int[MAX_STACK_SIZE]; eX`wQoV%
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int top=-1; e= { ?d6
int pivot; BD.&K_AW
int pivotIndex,l,r; arK(dg~S
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stack[++top]=0;
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stack[++top]=data.length-1; \
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while(top>0){ t@X{qm:%Z
int j=stack[top--]; 8'WoG]E_
int i=stack[top--]; r+=%Ag
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pivotIndex=(i+j)/2; ?)NgODU
pivot=data[pivotIndex]; [0bp1S~
^8.s"4{
SortUtil.swap(data,pivotIndex,j); h`i*~${yg
*.us IH2
file://partition ;t~Y>,
l=i-1; _tlr8vL
r=j; vVhSl$mW
do{ 8|JPQDS7
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 8I8{xt4
SortUtil.swap(data,l,r); z`H|]${X
}
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while(l SortUtil.swap(data,l,r); 5J-slNNCQ
SortUtil.swap(data,l,j); |@W|nbAfX
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if((l-i)>THRESHOLD){ .R^R32ln
stack[++top]=i; QXI#gA
=
stack[++top]=l-1; q}PUwN6
} mX/'Fta
if((j-l)>THRESHOLD){ 0g8ykGyx
stack[++top]=l+1; \B4f5L8k
stack[++top]=j; ,NAwSmocVP
} xWK0p'E0
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} wY]ejK$0R
file://new InsertSort().sort(data); `\beQ(g
insertSort(data); bblEZ%
} t5CJG '!ql
/** .TeGA;
* @param data /&N\#;kK?b
*/ 5X PoQ^
private void insertSort(int[] data) { 5Lm-KohT'
int temp; ;.66phe
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); dvE~EZcS
} 42f\]R,
} TO&^%d
} |F4)&xN\
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} <<DPer2
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归并排序: %0p9\I
`*o ko[\3
package org.rut.util.algorithm.support; (fYYcpd,k
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import org.rut.util.algorithm.SortUtil; ,\-4X
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/** wG&Z7C b
* @author treeroot ug_c}Nv=Y
* @since 2006-2-2 i,zZJ=a$
* @version 1.0 a8YFH$Xh
*/ !a4`SjOgu
public class MergeSort implements SortUtil.Sort{ ')T*cLQ><
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/* (non-Javadoc) tUksIUYD\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cp?6vu|RA
*/ >u\'k+=
public void sort(int[] data) { \WqC^Di
int[] temp=new int[data.length]; x"7PnN|~
mergeSort(data,temp,0,data.length-1); B?db`/G9
} aECpe'!m4
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private void mergeSort(int[] data,int[] temp,int l,int r){ e= XC$Jv
int mid=(l+r)/2; e6>[Z C
if(l==r) return ; Jt:)(&-t
mergeSort(data,temp,l,mid); >E7s}bL"
mergeSort(data,temp,mid+1,r); 4~AY:
ib|
for(int i=l;i<=r;i++){ >uo=0=9=
temp=data; i# fvF)
} A 4*D3\>%u
int i1=l; D;h JK-Y
int i2=mid+1; 6>3zD)tG
for(int cur=l;cur<=r;cur++){ de9e7.(2
if(i1==mid+1) zjTCq; G
data[cur]=temp[i2++]; peew<SX
else if(i2>r) WOeG3jMz?
data[cur]=temp[i1++]; (Z0.H3
else if(temp[i1] data[cur]=temp[i1++]; Vp1 Q^`a{G
else 9.:&u/e
data[cur]=temp[i2++]; ^?:
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} 2q
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} u/CR7Y
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} 8.&P4u i
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改进后的归并排序: =eR#]d
.zy2_3:
package org.rut.util.algorithm.support; /uPMzl
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import org.rut.util.algorithm.SortUtil; &gP1=P,!
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/** sHPlNwyy
* @author treeroot +f}w+
* @since 2006-2-2 oore:`m;
* @version 1.0 "AlR%:]24~
*/ _dc,}C
public class ImprovedMergeSort implements SortUtil.Sort { 4^*Z[6nt|
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private static final int THRESHOLD = 10; /VFQbJ+`
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/* MH]?:]K9V
* (non-Javadoc) 'X\C/8\
* 5>:p'zI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Va4AE)[/*
*/ -j^G4J
public void sort(int[] data) { ; m:I
int[] temp=new int[data.length]; PWV+M@
mergeSort(data,temp,0,data.length-1); !95Q4WH-@
} 3W[Ps?G
- v=ndJ.
private void mergeSort(int[] data, int[] temp, int l, int r) { 1`1Jn*|TI
int i, j, k; lrgvY>E0
int mid = (l + r) / 2; 6|Crc$4l
if (l == r) "Z"`X3,-z
return; BPy pA$
if ((mid - l) >= THRESHOLD) AY]rQ:I
mergeSort(data, temp, l, mid); )LL.fPic
else ;`Sn66&
insertSort(data, l, mid - l + 1); ?U,Xy xN
if ((r - mid) > THRESHOLD) yn2k!2]&T<
mergeSort(data, temp, mid + 1, r); m~@Lt~LZs
else G&yF9s)Lvs
insertSort(data, mid + 1, r - mid); YCBUc<)
>qdRqy)DC
for (i = l; i <= mid; i++) { +p-S36K~,7
temp = data; yg%T{hyzH
} (OG>=h8?
for (j = 1; j <= r - mid; j++) { CelM~W$=u
temp[r - j + 1] = data[j + mid]; 5(DnE?}vo
} rD>q/,X=\
int a = temp[l]; /b{Ufo3v
int b = temp[r]; [5]*
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for (i = l, j = r, k = l; k <= r; k++) { Ct0%3]<J
if (a < b) { G)=+Nt\*
data[k] = temp[i++]; ^56#{~%^?
a = temp; ?o d*"M
} else { 1!R:}r3t
data[k] = temp[j--]; QjsN7h&%
b = temp[j]; p S!N<;OWr
} b~+\\,q}
} F '55BY*!
} ([ hd
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/** r+nhm"9
* @param data =V^8RlBi
* @param l a]x\e{
* @param i HmpV;
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*/ ^p~ 3H
private void insertSort(int[] data, int start, int len) { (!<G` ;}u
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =YR+`[bfI
} EkP(]F
} )<L?3Jjt5
} "oCXG`.k&
} B)ibxM(n*
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堆排序: (PnrY~9
=(,dI[v
package org.rut.util.algorithm.support; \'x?VVw
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import org.rut.util.algorithm.SortUtil; T)cbpkH4
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/** YifTC-Q;
* @author treeroot 1<f,>BQ+
* @since 2006-2-2 ^^( 4xHN
* @version 1.0 Xx=.;FYk
*/ GnW_^$Fs
public class HeapSort implements SortUtil.Sort{ -KCQ!0\F
V7>{,
/* (non-Javadoc) <V*M%YWs
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ;<v9i#K5
*/ oFS)3.
public void sort(int[] data) { Z9lfd6MU,
MaxHeap h=new MaxHeap(); OSCe TkR
h.init(data); MtK5>mhZI`
for(int i=0;i h.remove(); ;gW?Fnry;
System.arraycopy(h.queue,1,data,0,data.length); nB ,&m&
} JZ0u/x5
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private static class MaxHeap{
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@RS|}M^4
void init(int[] data){ CA ,0Fe3
this.queue=new int[data.length+1]; M{~KT3c
for(int i=0;i queue[++size]=data; 4N{^niq7
fixUp(size); b~m|mb$
} rxAb]~MMp
} "ZFK-jn/
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private int size=0; ESv&x6H
wz5*?[4
private int[] queue; (yi{<$U*
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public int get() { 3+ r8yiY
return queue[1]; Uzd\#edxJ
} MQGR-WV=5
mkt%|Kb.
public void remove() { /bv4/P
SortUtil.swap(queue,1,size--); {AqPQeNgz
fixDown(1); $F86Dwd
} 5J<ghv>\P
file://fixdown S%m$LM]NCg
private void fixDown(int k) { eI*o9k$Qs
int j; ~@bh[o~rF
while ((j = k << 1) <= size) { Zae$M0)
if (j < size %26amp;%26amp; queue[j] j++; HWT^u$a"
if (queue[k]>queue[j]) file://不用交换 XqTDLM&
break; |0/~7l
SortUtil.swap(queue,j,k); ~!W{C_*N
k = j; _8"%nV
} qU,u(El
} 3.s.&^
private void fixUp(int k) { ]
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while (k > 1) { [D%5Fh\0
int j = k >> 1; uVw|fT
if (queue[j]>queue[k]) -?68%[4lm_
break; -.X-02
SortUtil.swap(queue,j,k); }e* OprF
k = j; X,h"%S<c#H
} K PSHBv-#
} *_7%n-k
V0x;*)\PYm
} rSvQarT
&?#G)suP
} vmZyvJSE
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SortUtil: nB1[OB{
aM|^t:
package org.rut.util.algorithm; s!j[Ovtx
11(:#4Y,
import org.rut.util.algorithm.support.BubbleSort; %^$7z,>;
import org.rut.util.algorithm.support.HeapSort; %0!!998
import org.rut.util.algorithm.support.ImprovedMergeSort; td#B$$[
import org.rut.util.algorithm.support.ImprovedQuickSort; S @MO
import org.rut.util.algorithm.support.InsertSort; <wZ2S3RNA
import org.rut.util.algorithm.support.MergeSort; N3J;_=<4
import org.rut.util.algorithm.support.QuickSort; |B;tv#mKD
import org.rut.util.algorithm.support.SelectionSort; B#T4m]E/
import org.rut.util.algorithm.support.ShellSort; 8vLaSZ="[
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/** VgO:`bDF
* @author treeroot @H^Yf
* @since 2006-2-2 <,!e*V*U
* @version 1.0 AsW!GdIN
*/ hc;8Vsa
public class SortUtil { RrGFGn{
public final static int INSERT = 1; Xo:!U=m/#
public final static int BUBBLE = 2; 0qj:v"~Q
public final static int SELECTION = 3; #r}O =izi
public final static int SHELL = 4; _3YuPMaN
public final static int QUICK = 5; M3U*'A\
public final static int IMPROVED_QUICK = 6; sV))Z2sq
public final static int MERGE = 7; U\
Et
public final static int IMPROVED_MERGE = 8; xQ=sZv^M
public final static int HEAP = 9; |99/?T-QW
eZMDt B
public static void sort(int[] data) { OIMsxXF\J
sort(data, IMPROVED_QUICK); 1]i{b/ 4
} bZ$;`F5})
private static String[] name={ dyz)22{\!`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" F5|6* K
}; \qAg]-
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private static Sort[] impl=new Sort[]{ N%k6*FBp~
new InsertSort(), M(alc9tn
new BubbleSort(), ju-tx
:
new SelectionSort(), Oist>A$Z
new ShellSort(), S}Q/CT?au
new QuickSort(), VM1`:1Z:$
new ImprovedQuickSort(), ebSG|F
new MergeSort(), TM1isZ
new ImprovedMergeSort(), M6 W{mek
new HeapSort() ?W*{%my
}; Nj<}t/e
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public static String toString(int algorithm){ 4Y)rgLFj
return name[algorithm-1]; *,:>EcDr
} q*|H*sS
Sd!!1as
public static void sort(int[] data, int algorithm) { XvU^DEfW
impl[algorithm-1].sort(data); PtUea
} `*J;4Ju@
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public static interface Sort { v\3:R,|'
public void sort(int[] data); arR9uxP
} _R,VNk
Pd<s#
public static void swap(int[] data, int i, int j) { &p)]Cl/`
int temp = data; xpWx6
data = data[j]; X2?
^t]-N
data[j] = temp; ZH:-.2*cj
} mUmU_L u8
} *v}8n95*2