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。 1M`>;fjYa
插入排序: SOG(&)b
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package org.rut.util.algorithm.support; 1$DcE>
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import org.rut.util.algorithm.SortUtil; }Nn+Ny
/** pF6u3]
* @author treeroot ]+`K\G ^X
* @since 2006-2-2 ue3 ].:
* @version 1.0 |};d:LwX
*/ Z5'^Hj1,
public class InsertSort implements SortUtil.Sort{ gm5%X'XL
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/* (non-Javadoc) 4w|t|?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dlyGgaV*X
*/ PO5,lcBD<
public void sort(int[] data) { j+'ua=T3
int temp; v1i-O'
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); CSjd&G*ZB
} %_n%-Qn
} #3ZAMV
} gHh(QRA
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} 'O 7:=l
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冒泡排序: ~c&sr5E
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; ?$)a[UnqX
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/** VO1
* @author treeroot `[E-V
* @since 2006-2-2 C<C^7-5
* @version 1.0 2ia&c@P-
*/ kqZRg>1A
public class BubbleSort implements SortUtil.Sort{ 4D5Wse
@lM-+q(tl
/* (non-Javadoc) ,;YNI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x]Nx,tt
*/ [<
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public void sort(int[] data) { vp&.
int temp; 9T2_2
for(int i=0;i for(int j=data.length-1;j>i;j--){ +5-|6
if(data[j] SortUtil.swap(data,j,j-1); YG?4DF
} ^^k9Acd~p
} *EO*Gg0d
} _UP 9b@Z"
} vx6lud0k}
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} WJ8osWdLu
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选择排序: EBWM8~Nm#
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package org.rut.util.algorithm.support; * >2FcoN;
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import org.rut.util.algorithm.SortUtil; -#<{3BJTrz
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/** @D["#pe,}
* @author treeroot rkh%[o9"/
* @since 2006-2-2 G{|"WaKW
* @version 1.0 S+Ia2O)BA
*/ ( ,mV6U%
public class SelectionSort implements SortUtil.Sort { zZ Y1E@~
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/* >'m&/&h
* (non-Javadoc) W}7Uh
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* li{<F{7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) jL)Y'
*/ ze
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public void sort(int[] data) { 7On.y*
int temp; iz [IK%K
for (int i = 0; i < data.length; i++) { EHl~y=9
int lowIndex = i; 0%|)=T3Slu
for (int j = data.length - 1; j > i; j--) { <)_#6)z:
if (data[j] < data[lowIndex]) { 03 iy[~Y2
lowIndex = j; ,9F3~Ryt(
} #PC*l\
)
} xIb{*)BUwc
SortUtil.swap(data,i,lowIndex); [P6A$HC<
} I@Yk &aU
} F}F{/
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} /r&4< @
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Shell排序: :: GW
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package org.rut.util.algorithm.support; yk^2<?z>2
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import org.rut.util.algorithm.SortUtil; F7=\*U
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/** u^2/:L
* @author treeroot )\W}&9 >
* @since 2006-2-2 i$:yq. DW
* @version 1.0 "cOBEhn%l
*/ %rl<%%T#.M
public class ShellSort implements SortUtil.Sort{ g<w1d{Td
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/* (non-Javadoc) Fy>g*3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8@6*d.+e
*/ ]g%HU%R-m
public void sort(int[] data) { D51O/.:U2
for(int i=data.length/2;i>2;i/=2){ a_D K"8I
for(int j=0;j insertSort(data,j,i); e-xT.RnQ
} '7@Dw;
} h9nh9a(2
insertSort(data,0,1); >Fe=PRs
} ^Y8G}Z|
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/** M%!j\}2A
* @param data ZxDh!_[s
* @param j @}%kSn5y:
* @param i 0'zjPE#
*/ !l9#a{#6l
private void insertSort(int[] data, int start, int inc) { g ZES}]N
int temp; CWD
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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); l`:-B'WM
} $ Fy)+<
} ZS&lXgo
} [eDRghK
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} 1@+&6UC
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快速排序: Ax4;[K\Q
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package org.rut.util.algorithm.support; E/d\ebX|
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import org.rut.util.algorithm.SortUtil; 8nSw7:z
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/** <1U *{y
* @author treeroot ?Xp+5{
* @since 2006-2-2 NVDvd6
* @version 1.0 hSk
*/ !:D,|k\m
public class QuickSort implements SortUtil.Sort{ \JF 2'm\M
<FvljKuq+
/* (non-Javadoc) ZgzYXh2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7{[i)
*/ XfwH1n/o#
public void sort(int[] data) { c+<gc:#jy
quickSort(data,0,data.length-1); Z1DF )
} DEenvS`,P
private void quickSort(int[] data,int i,int j){ g^k=z:n3,
int pivotIndex=(i+j)/2; S|BS;VY
file://swap N)YoWA>#bF
SortUtil.swap(data,pivotIndex,j);
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int k=partition(data,i-1,j,data[j]); []H0{a2{<
SortUtil.swap(data,k,j); wq#'o9s,
if((k-i)>1) quickSort(data,i,k-1); uU8L 93
if((j-k)>1) quickSort(data,k+1,j); 0h"uJco,
7"k\i=
} 9Cw !<
/** o@|kq1m8
* @param data m^a0JR}u9
* @param i GF*E+/
;
* @param j I8:G:s:
* @return ~#JX
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*/ UeSPwY
private int partition(int[] data, int l, int r,int pivot) { 1++ Fs
do{ bY=Yb
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); l8N5}!N
SortUtil.swap(data,l,r); KRj3??b
} rj;~SC{
while(l SortUtil.swap(data,l,r); El3Ayd3
return l; U{-[lpd
}
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} 7o`pNcabtz
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改进后的快速排序:
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package org.rut.util.algorithm.support; %J|xPp)
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import org.rut.util.algorithm.SortUtil; '5SO3/{b
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/** bn"z&g
* @author treeroot *",
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* @since 2006-2-2 gd\b]L?>O
* @version 1.0 #.~lt8F
*/ kZvh<NFh_
public class ImprovedQuickSort implements SortUtil.Sort { C)qP9uW
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private static int MAX_STACK_SIZE=4096; jQ\/R~)O
private static int THRESHOLD=10; oJ)v6"j
/* (non-Javadoc) aOo;~u2-=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t M{U6k
*/ 55|.MXzq
public void sort(int[] data) { G@Vz
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int[] stack=new int[MAX_STACK_SIZE]; ~m@w p
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int top=-1; t%>x}b"2T
int pivot; i"C?6R
int pivotIndex,l,r; 'QEQyJ0EB
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stack[++top]=0; QCk(qlN'h9
stack[++top]=data.length-1; Q\<^ih51
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while(top>0){ Y=N; Bj
int j=stack[top--]; f Tc,"{
int i=stack[top--]; #pw=HHq*(
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pivotIndex=(i+j)/2; 66~]7w
pivot=data[pivotIndex]; ]&/KAk
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SortUtil.swap(data,pivotIndex,j); 9ApGn!`
#T8$NZA
file://partition VpMPTEZ*L
l=i-1; We*)RXm%
r=j; !56gJJ-r
do{ RDu'N
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); g"Z X1X
SortUtil.swap(data,l,r); 5U/1Z{
} |+MV%QG;
while(l SortUtil.swap(data,l,r); {1ic*cZS
SortUtil.swap(data,l,j); |E)IJj
3
mjqVP.
if((l-i)>THRESHOLD){ U'acVcD
stack[++top]=i; ;Q =EI%_tv
stack[++top]=l-1; z3[0BWXs
} Uwqm?]
if((j-l)>THRESHOLD){ ?geEq'
stack[++top]=l+1; J12ZdC'O
stack[++top]=j; rn?:utP
} k(;c<Z{?1
zSiSZMP"
} QAy9RQ0
file://new InsertSort().sort(data); RZ[r XV5
insertSort(data); I!;# Nk>
} Tx7YHE6{
/** -'|pt,)
* @param data $bU|'}QR
*/ ya'@AJS
private void insertSort(int[] data) { iM Xl}3
int temp; >, &6zj
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ~qiSkG
} -hP@L ++D
} 4565U
} |^ml|cb
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} e.0vh?{\
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归并排序: BV&}(9z
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package org.rut.util.algorithm.support; VB 8t"5
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import org.rut.util.algorithm.SortUtil; T!hU37g h?
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/** ujcNSX*
* @author treeroot 'sm+3d
* @since 2006-2-2 t?v0ylN
* @version 1.0 jK&kQ
*/ flLC\
public class MergeSort implements SortUtil.Sort{ KW.S)+<H&
O;:8mm%(
/* (non-Javadoc) 0X)'8N
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~"5WQK`@
*/ "$#x+|PyC
public void sort(int[] data) {
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int[] temp=new int[data.length]; XTyn[n
mergeSort(data,temp,0,data.length-1); fh
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} Ckvm3r\i2
/
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private void mergeSort(int[] data,int[] temp,int l,int r){ {61NLF\0H
int mid=(l+r)/2; o"v>
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if(l==r) return ; -Tk~c1I#`
mergeSort(data,temp,l,mid); @yB!? x
mergeSort(data,temp,mid+1,r);
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for(int i=l;i<=r;i++){ Xt8;Pl
temp=data; tZ=BK:39\
} [(`T*c.#.X
int i1=l; |zvxKIW;wd
int i2=mid+1; tGd9Cs9D<
for(int cur=l;cur<=r;cur++){ /Yx 1S'5
if(i1==mid+1) G_[|N>
data[cur]=temp[i2++]; "^<:7 _Y
else if(i2>r) 5<a)SP 0
data[cur]=temp[i1++]; _hMVv&$
else if(temp[i1] data[cur]=temp[i1++]; ~@bCSOIy
else G+'MTC_
data[cur]=temp[i2++]; 9))%tYN
} _e8@y{/~Fd
} PKfxL}:"8
oRy?Dx+H
} eJ%~6c`@!
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改进后的归并排序: BaiC;&(
\p@,+ -gX
package org.rut.util.algorithm.support; n4k.tq
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import org.rut.util.algorithm.SortUtil; F^T7u?^)
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/** / vje='[!
* @author treeroot \E?1bc{\f
* @since 2006-2-2 zmf5!77
* @version 1.0 \#2,1W@
*/ Fdu0?H2TL
public class ImprovedMergeSort implements SortUtil.Sort { P!B\:B%4~]
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private static final int THRESHOLD = 10; wXXv0OzK
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/* lUCdnp;w'
* (non-Javadoc) )@1_Dm@0b
* *qY`MW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "@GopD
*/ Zf]d'oW{/
public void sort(int[] data) { )5d&K8@
int[] temp=new int[data.length]; Gk799SDL
mergeSort(data,temp,0,data.length-1); IH[/fd0
} 1x M&"p:
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private void mergeSort(int[] data, int[] temp, int l, int r) { JYm@Llf)$
int i, j, k; X-oou'4<
int mid = (l + r) / 2; ]4uIb+(S
if (l == r) ]wa?~;1^&
return; @%ChPjN
if ((mid - l) >= THRESHOLD) NqhRJa63
mergeSort(data, temp, l, mid); \+Qx}bS{
else 4w]u: eU
insertSort(data, l, mid - l + 1); Ha)w*1&w"
if ((r - mid) > THRESHOLD) }4_izKS
mergeSort(data, temp, mid + 1, r); cQgmRHZ]
else %tUJ >qYU
insertSort(data, mid + 1, r - mid); 3iH!;`i
Zn#ri 8S
for (i = l; i <= mid; i++) { @YpA'cX7
temp = data; u4z]6?,"e
} @] )a
for (j = 1; j <= r - mid; j++) { u"pn'H
temp[r - j + 1] = data[j + mid]; j]Rl1~+M
} JkQ4'$:
int a = temp[l];
@tDVW*!
int b = temp[r]; w4(DR?[nC
for (i = l, j = r, k = l; k <= r; k++) { `'Z ;+h]
if (a < b) { 6G@_!i*2F
data[k] = temp[i++]; T`a [~:
a = temp; {v;Y}o-p
} else { q G=`'%,m
data[k] = temp[j--]; TrkoLJmB
b = temp[j]; x0Tb7y`
} tJHzhH)
} J&8l1{gd
} VCbnS191*
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/** [2)Y0; ["
* @param data bmt2~!
* @param l jew?cnRmd
* @param i Z"e|DP`
*/ dBobVT'
private void insertSort(int[] data, int start, int len) { De4+4&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P}?,*'b
} A`X$jpAn&
} =H!u4
} 9-bDgzk
} 5Z`f)qE
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堆排序: Qs;bVlp!H
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package org.rut.util.algorithm.support; )5&w
6"jq/Pu
import org.rut.util.algorithm.SortUtil; v
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/** !\?? [1_e
* @author treeroot (MNbABZQ
* @since 2006-2-2 7U?x8%H*
* @version 1.0 sEhdkN}6
*/ 7z F29gC
public class HeapSort implements SortUtil.Sort{ q1NAKcA<U
bX5>qqB]
/* (non-Javadoc) oEKLuy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4V<s"
*/ _Y}(v((;
public void sort(int[] data) { %Vive2j C
MaxHeap h=new MaxHeap(); P"3{s+ r
h.init(data); uWi+F)GS^K
for(int i=0;i h.remove(); w(.k6:e
System.arraycopy(h.queue,1,data,0,data.length); Bv!j.$0d{
} 1_GUi
v0=^Hym
private static class MaxHeap{ }1d
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PN0:,.4
void init(int[] data){ ]hv4EL(zi
this.queue=new int[data.length+1]; oD~VK,.
for(int i=0;i queue[++size]=data; 8n);NZ
fixUp(size); obaJT"1
} KQQR"[z&V
} <P}{0Y~@*W
-br/
private int size=0; !*+~R2&b
[^~Fu9+"
private int[] queue; 'S@C,x%2,
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public int get() { 7(Y!w8q&^
return queue[1]; u -CY-
} 2-]gHAw%
MCL5a@BX)
public void remove() { /`}C~
SortUtil.swap(queue,1,size--); .CrahV1G
fixDown(1); m3P%E8<Q#
} YG"P:d;s
file://fixdown &7|=8Z[o
private void fixDown(int k) { q.uIZ
int j; wgzjuTqwBF
while ((j = k << 1) <= size) { 73 D|gF*
if (j < size %26amp;%26amp; queue[j] j++; 2/qfK+a
if (queue[k]>queue[j]) file://不用交换 O2ety2}?f
break; Fu{[5uv
SortUtil.swap(queue,j,k); X: @nROL^7
k = j; |giK]Z
} 9IC"p<D
} AEOo]b*&d
private void fixUp(int k) { 5JIa?i>B
while (k > 1) { `!>zYcmT
int j = k >> 1; 'hf-)\Ylf
if (queue[j]>queue[k]) YeYFPi#
break; zZ
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SortUtil.swap(queue,j,k); _"##p
k = j; Qh%7RGh_
} }qi6K-,oU
} s|%mGt &L
j?[fpN$
}
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.oN<c]iqE
} >2vl & (
r >u0Y
SortUtil: 6=MejT
dkLc"$(O
package org.rut.util.algorithm; `f8{^Rau
9k& lq$
import org.rut.util.algorithm.support.BubbleSort; E6y/,s^~S_
import org.rut.util.algorithm.support.HeapSort; (ZT*EFhb(
import org.rut.util.algorithm.support.ImprovedMergeSort; ~EpMO]I
import org.rut.util.algorithm.support.ImprovedQuickSort; V0c*M>V
import org.rut.util.algorithm.support.InsertSort; aq0J }4U
import org.rut.util.algorithm.support.MergeSort; XDz![s
import org.rut.util.algorithm.support.QuickSort; ,#`gwtFG
import org.rut.util.algorithm.support.SelectionSort; e7>)Z
import org.rut.util.algorithm.support.ShellSort; D0us<9q
Bwn9ZYu#r
/** -TjYQ
* @author treeroot "7l p|0I
* @since 2006-2-2 @@'zMV%
* @version 1.0 [/6$P[
*/ iG6 ^s62z7
public class SortUtil { t \Fc <
public final static int INSERT = 1; ipw _AC~
public final static int BUBBLE = 2; aVO5zR./)
public final static int SELECTION = 3; `a3q)}*Y
public final static int SHELL = 4; QKE$>G
public final static int QUICK = 5; w`c9_V
public final static int IMPROVED_QUICK = 6; J,4]du$
public final static int MERGE = 7; 43A6B
public final static int IMPROVED_MERGE = 8; /-8v]nRB
public final static int HEAP = 9; X>wB=z5PXK
G>YJ3p7
public static void sort(int[] data) { 9c=Y+=<
sort(data, IMPROVED_QUICK); (|bMtT?"x
} n-}:D<\7
private static String[] name={ l:z:tJ#(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" VahR nD
}; B5 C]4
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private static Sort[] impl=new Sort[]{ "of (,p
new InsertSort(), ^ B=x-G.
new BubbleSort(), Q7N4@w;e
new SelectionSort(), OcQ_PE5\
new ShellSort(), B(:Kw;r?
new QuickSort(), "SNsOf
new ImprovedQuickSort(), K.*?\)&
new MergeSort(), 0`h[|FYV
new ImprovedMergeSort(), P9B@2#
new HeapSort() )XnG.T{0|
}; +&4PGv53J
QTz{ZNi!
public static String toString(int algorithm){ 2 8f-8B
return name[algorithm-1]; 7. G
} PUltn}M
eG"iJ%I
public static void sort(int[] data, int algorithm) { 8!VjXj"
impl[algorithm-1].sort(data); "f!*%SR:
1
} d;mQ=k
1
@7u4v%,wB
public static interface Sort { "2HRuqf
public void sort(int[] data); ~9kvC&/{[
} ,^26.p$
@Sq=#f/=
public static void swap(int[] data, int i, int j) { wju~ 5
int temp = data; `DG6ollp{
data = data[j]; at,Xad\j
data[j] = temp;
#7lkj:j4
} thipfS
} iJ?8)}