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。 V`g\ja*Y
插入排序: lTV@b&
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package org.rut.util.algorithm.support; C,|nmlDN
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import org.rut.util.algorithm.SortUtil; -[zdX}x.:
/** _OJ0 < {E
* @author treeroot '<?v:pb9
* @since 2006-2-2 >J^7}J
* @version 1.0 *`+<x
*/ mh
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public class InsertSort implements SortUtil.Sort{ 'ZGT`'ri
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/* (non-Javadoc) jU]]:S4xD/
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `P ^u:
*/ &547`*
public void sort(int[] data) { j}rgOz.
int temp; XlPK3^'N)h
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); <pTQpU
}
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} aPD?Bh>JU
} J ?ztn
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} m4Phn~>Gg
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冒泡排序: L _vblUDq
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package org.rut.util.algorithm.support; pBSq%Hy:
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import org.rut.util.algorithm.SortUtil; Bmx(qE
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/** w8 ?Pb$Fe
* @author treeroot mP9cBLz
* @since 2006-2-2 qZ8|B
* @version 1.0 G0I~&?nDa
*/ TJHN/Z/
public class BubbleSort implements SortUtil.Sort{ 8%;}LK
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/* (non-Javadoc) z>cIiprX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F^.om2V|9
*/ K-2.E
public void sort(int[] data) { BW'L.*2
int temp; wXr>p)mP
for(int i=0;i for(int j=data.length-1;j>i;j--){ aL8p"iSG9
if(data[j] SortUtil.swap(data,j,j-1); zyaW3th
} c=b+g+*xd
} "bD+/\ z
} :dc"b?Ch
} c@RT$Q9j
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} p+orBw3
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选择排序: Z{Vxr*9oO
x`]Ofr'
package org.rut.util.algorithm.support; +<pVf%u5
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import org.rut.util.algorithm.SortUtil; Ef2Yl
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/** jMN)?6$=
* @author treeroot u|(Ux~O
* @since 2006-2-2 4^0d)+Ff
* @version 1.0 w+t# Yb\7
*/ 7V~
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public class SelectionSort implements SortUtil.Sort { `%$8cZ-kr
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/* `+roQX.p
* (non-Javadoc) C1h#x'k
* y\^@p=e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8<YX7e
*/ #$LH2?)
public void sort(int[] data) { rlR
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int temp; seu
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for (int i = 0; i < data.length; i++) { }sf YCz
int lowIndex = i; )HEfU31IC
for (int j = data.length - 1; j > i; j--) { ;c1relR2
if (data[j] < data[lowIndex]) { LMAmpVo
lowIndex = j; 4F}Pu<;
} M0RRmW@f.a
} tS?a){^:c
SortUtil.swap(data,i,lowIndex); t";{1.
} 2ubmsbt$
} {bT9VZ>
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} <v]z6B@9!
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Shell排序: +C'XS{K,#
t2"@Ps&1|
package org.rut.util.algorithm.support; qv
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import org.rut.util.algorithm.SortUtil; XAkK:}h
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/** 8h@q
* @author treeroot },rav]
* @since 2006-2-2 e,EK,,iY5
* @version 1.0 |)9thIQF
*/ 1hR
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public class ShellSort implements SortUtil.Sort{ OFL|RLiD
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/* (non-Javadoc) kB8
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N*Yy&[
*/ 2R~6<W+&:>
public void sort(int[] data) { ndr)3tuYu
for(int i=data.length/2;i>2;i/=2){ s8^~NX(xdy
for(int j=0;j insertSort(data,j,i); 88
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} fO6[!M(
} Nu@5 kwH
insertSort(data,0,1); G%S6$@:
} "lTZ|k^
7!pLK&_
/** rOW;yJ[
* @param data Kv}k*A% S
* @param j %MN.O-Lc
* @param i W@^J6sH
*/ O16r!6=-n
private void insertSort(int[] data, int start, int inc) { flP>@i:e6
int temp; zDB"r
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); h}h^L+4
} t)} \9^Uo
} |=O1Hn
} R"Kz!NTB
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} '99@=3AB:`
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快速排序: fYB*6Xb,w
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package org.rut.util.algorithm.support; oE1M/*myS
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import org.rut.util.algorithm.SortUtil; X]!D;7^
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/** m<{"}4'
* @author treeroot KnJx{8@z
* @since 2006-2-2 C`NmZwL
* @version 1.0 =p q:m
*/ DVh)w}v
public class QuickSort implements SortUtil.Sort{ MWs~#ReZ
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/* (non-Javadoc) oSY7IIf%L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -(9O6)Rs$
*/ 7Lg7ei2mN7
public void sort(int[] data) { }Gr&w-v
quickSort(data,0,data.length-1); d`Oe_<
} xIL#h@dz
private void quickSort(int[] data,int i,int j){ 0Gsu
int pivotIndex=(i+j)/2; i6Qb[\;
file://swap T#@{G,N
SortUtil.swap(data,pivotIndex,j); H@D;e
F.?01,J=1
int k=partition(data,i-1,j,data[j]); b/u8}
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SortUtil.swap(data,k,j); J=iRul^S
if((k-i)>1) quickSort(data,i,k-1); q jz3<`7-
if((j-k)>1) quickSort(data,k+1,j); d; =u
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} 2 z7}+lH
/** qfYG.~`5
* @param data w{`Acu
* @param i PNpu*#Z`
* @param j I8u!\F
* @return 59<hV?
*/ zsVcXBz
private int partition(int[] data, int l, int r,int pivot) { XQ?fJWLU
do{ \GL*0NJ
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); b+{r!D}~
SortUtil.swap(data,l,r); \}#@9=
} zTY;8r+
while(l SortUtil.swap(data,l,r); mj2Pk,,SA
return l; Nqcp1J"
} z)}!e,7
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} ? %(spV
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改进后的快速排序: k!3 cq)
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package org.rut.util.algorithm.support; O~PChUU*Y
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import org.rut.util.algorithm.SortUtil; &94W-zh
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/** M'2r@NR8
* @author treeroot g)R1ObpZ
* @since 2006-2-2 o=_c2m
* @version 1.0 BpH%STEN
*/ VEs5;]#<2D
public class ImprovedQuickSort implements SortUtil.Sort { G\=_e8(
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private static int MAX_STACK_SIZE=4096; g^l RG3a
private static int THRESHOLD=10; Ur!~<4GO
/* (non-Javadoc) eT[&L @l]b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %>zjGF<
*/ ('hT
public void sort(int[] data) { 6kR\xP]Kr
int[] stack=new int[MAX_STACK_SIZE]; SK
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int top=-1; 1e}8LH7
int pivot; 0<.RA%dj
int pivotIndex,l,r; "0Q1qZ
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stack[++top]=0; C:i|-te
stack[++top]=data.length-1; @i LIU}+
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while(top>0){ #xT!E:W'
int j=stack[top--]; }x :f%Z5h
int i=stack[top--]; gXy-Mpzp
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pivotIndex=(i+j)/2; ss
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pivot=data[pivotIndex]; vFQ,5n;fF
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SortUtil.swap(data,pivotIndex,j); uMmXs%9T
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file://partition M%`\P\A
l=i-1; dRaO Gm)
r=j; QlEd6^&
do{ 38IMxd9v
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); &<]<a_pw
SortUtil.swap(data,l,r); :iPym}CE
} )9L/sKz
while(l SortUtil.swap(data,l,r); 2k5/SV
X
SortUtil.swap(data,l,j); $yu?.b
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if((l-i)>THRESHOLD){ rv7{Ow_Y
stack[++top]=i; z|N3G E(.@
stack[++top]=l-1; rHz||jjU
} Q5a)}6-5
if((j-l)>THRESHOLD){ yI3kvh
stack[++top]=l+1; BRv x[u
stack[++top]=j; T
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} 1^G{tlA-
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} DjLL|jF
file://new InsertSort().sort(data); L,LNv
insertSort(data); M;.ZM<Ga
} W?Ww2Lo%Y
/** o:p
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* @param data szmmu*F,U:
*/ dl~|Izm
private void insertSort(int[] data) { se9>.}zZN
int temp; Log|%P\
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); sa&) #Z:
} bC6oqF'#
} 9`B$V##-L
} T+IF}4ed
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} rcN 9.1
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归并排序: `{Tk@A_yd
p/GVTf
package org.rut.util.algorithm.support; bPbb\|u0d
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import org.rut.util.algorithm.SortUtil; s60
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/** Hi}RZMr1
* @author treeroot $E!J:Y=
* @since 2006-2-2 |>
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* @version 1.0 ~d
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*/ v&
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public class MergeSort implements SortUtil.Sort{ [wnDHy6W
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/* (non-Javadoc) jp2Q9Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r'7LR
*/ S<wj*"|.s
public void sort(int[] data) { PoSpkJH
int[] temp=new int[data.length]; a;AzY'R
mergeSort(data,temp,0,data.length-1); Dt|)=a
} EHf\L
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private void mergeSort(int[] data,int[] temp,int l,int r){ 9 ;i\g=
int mid=(l+r)/2; 2f~($}+*
if(l==r) return ; %;xOB^H^
mergeSort(data,temp,l,mid); ~@W*r5/
mergeSort(data,temp,mid+1,r); Kg\R+i@#<
for(int i=l;i<=r;i++){ K }$&:nao
temp=data; 3L5r*fa
} U9hS<}<Ki
int i1=l; OQ&'Dti
int i2=mid+1; TFQ!7'xk)
for(int cur=l;cur<=r;cur++){ /8'S1!zc
if(i1==mid+1) 5 `/< v^
data[cur]=temp[i2++]; iEyeX0nm
else if(i2>r) Cfu=u *u
data[cur]=temp[i1++]; 0%`4px4J
else if(temp[i1] data[cur]=temp[i1++]; :mcYZPX#
else zbkMFD.{y
data[cur]=temp[i2++]; /iaf ^
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} C~%
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} ay
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} }iB|sl2J
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改进后的归并排序: !D^c3d
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package org.rut.util.algorithm.support; O[@q%&_
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import org.rut.util.algorithm.SortUtil; (5L-G{4
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/** s@4nWe
* @author treeroot B=f,QU
* @since 2006-2-2 zmuMWT;
* @version 1.0 x Gk6n4Gg
*/ o+B:#@9?
public class ImprovedMergeSort implements SortUtil.Sort { #]WqM1u
1 T<+d5[C
private static final int THRESHOLD = 10; I{'f|+1
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/* HeGYu?&
* (non-Javadoc) 6?tlU>A2s
* QF2q^[>w6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CTa#Q,
*/ .wA+S8}S
public void sort(int[] data) { E>LkJSy=
int[] temp=new int[data.length]; 5Z/7kU=I
mergeSort(data,temp,0,data.length-1); T4/fdORS
} w'4AJ Q|;
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private void mergeSort(int[] data, int[] temp, int l, int r) { B;6]NCxD
int i, j, k; 9LnN$e
int mid = (l + r) / 2; X!hIwi A,t
if (l == r) E(pF:po
return; `>(W"^
if ((mid - l) >= THRESHOLD) )m3Uar
mergeSort(data, temp, l, mid); _n8GWBi
else IA zZ1#/3
insertSort(data, l, mid - l + 1); +gd2|`#
if ((r - mid) > THRESHOLD) ^ >x|z.
mergeSort(data, temp, mid + 1, r); qVqRf.-\
else u|#>32kV
insertSort(data, mid + 1, r - mid); 4LcX<BU9
RprKm'b8x`
for (i = l; i <= mid; i++) { 2zSG&",2D
temp = data; o Pci66
} QS.>0i/7l
for (j = 1; j <= r - mid; j++) { C;+(Zp
temp[r - j + 1] = data[j + mid]; @Hb'8F
} fc=Patg
int a = temp[l]; :# E*Y8-
int b = temp[r]; @:0ddb71
for (i = l, j = r, k = l; k <= r; k++) { @!N-RQ&A
if (a < b) { bu7'oB~:V^
data[k] = temp[i++]; 2aZw[7s
a = temp; %_-zWVJ
} else { 9h90huyKF
data[k] = temp[j--]; #m{{a]zm^
b = temp[j]; B5V_e!*5F*
} WF&[HKOy/
} ^efb
5
} O%~jop7#6
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/** v44}%$
* @param data r[(xjn
* @param l Lf([dE1
* @param i @oF$LMD
*/ ]r!>{
private void insertSort(int[] data, int start, int len) { i@5[FC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HW4.zw
} o;a:Dd
} 6Tw#^;q-
} =\#%j|9N9
} GDhE[of
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堆排序: '3]p29v{
HjqB^|z
package org.rut.util.algorithm.support; ,B(7\
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import org.rut.util.algorithm.SortUtil; o}Odw;
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/** PjT=$]
* @author treeroot 1(zsOeX
* @since 2006-2-2 H7Uli]e3
* @version 1.0 p^nL&yIW,%
*/ E9|eu\
public class HeapSort implements SortUtil.Sort{ 4h!f/aF'
,/&'m13b/L
/* (non-Javadoc) l.\re"Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ECdvX0*a
*/ f'I z
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public void sort(int[] data) { $&s=68
MaxHeap h=new MaxHeap(); w;}@'GgL
h.init(data); `~eX55W
for(int i=0;i h.remove(); b `2|I {
System.arraycopy(h.queue,1,data,0,data.length); ;4M><OS!
} a07@C
tt?58dm|
private static class MaxHeap{ -7/s]9o'
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void init(int[] data){ <^b7cOFQ
this.queue=new int[data.length+1]; G2LK]
for(int i=0;i queue[++size]=data; <H1`
fixUp(size); n,eJ$2!J
} YSJy`
} F/m^?{==~*
L%v^s4@
private int size=0; ,uw132<b
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private int[] queue; ,:~0F^z
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public int get() {
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return queue[1]; lZ8CY
} #po5_dE\*
lf>*Y.!@me
public void remove() { =.]l*6WV
SortUtil.swap(queue,1,size--); yc2/~a_Gx
fixDown(1); RsU3Gi_Zdz
} kt[:@Nda9
file://fixdown wxm:7$4C
private void fixDown(int k) { tx"sH]n
int j; BQcE9~H
while ((j = k << 1) <= size) { JGC=(;
if (j < size %26amp;%26amp; queue[j] j++; *`j-i
if (queue[k]>queue[j]) file://不用交换 X1IeSMAe
break; Eh-n
SortUtil.swap(queue,j,k); +,o0-L1D
k = j; <9=9b_z
} {QBB^px
} x}U8zt)yD3
private void fixUp(int k) { ze_{=Cv&Y
while (k > 1) { Wv__ wZ
int j = k >> 1; `28};B>
if (queue[j]>queue[k]) %}86D[PF
break; M
:3u@06a
SortUtil.swap(queue,j,k); ]
2DH;
k = j; ZYf2XI(_"
} U.AjYez
} pA{ 5V9
*Nyev]8
} ^qCkt1C-M
LG~S8u
} JKer//ng4
!R*-R.%
SortUtil: Q^p|Ldj
h/x0]@M&
package org.rut.util.algorithm; $^&ig
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import org.rut.util.algorithm.support.BubbleSort; r ]W
import org.rut.util.algorithm.support.HeapSort; 7nbB^2
import org.rut.util.algorithm.support.ImprovedMergeSort; _#$*y
import org.rut.util.algorithm.support.ImprovedQuickSort; ?JV|dM
import org.rut.util.algorithm.support.InsertSort; 6"c1;P!4
import org.rut.util.algorithm.support.MergeSort; 'Dvv?>=&
import org.rut.util.algorithm.support.QuickSort; mh<=[J,%p
import org.rut.util.algorithm.support.SelectionSort; eI1GXQ%
import org.rut.util.algorithm.support.ShellSort; aNyvNEV3C
^xf<nNF:p
/** axHK_1N{
* @author treeroot ]$U xCu
* @since 2006-2-2 0-LpqX
* @version 1.0 e*+FpW@
*/ =%zLh<3v
public class SortUtil { `/Nm
2K
public final static int INSERT = 1; yq+!czlZ
public final static int BUBBLE = 2; Z/^ u
public final static int SELECTION = 3; ]"c+sMW
public final static int SHELL = 4; [-&L8Un
public final static int QUICK = 5; +(uYwdcN
public final static int IMPROVED_QUICK = 6; F}"] 92
public final static int MERGE = 7; LqdY Qd51
public final static int IMPROVED_MERGE = 8; j)t+jcMUI
public final static int HEAP = 9; & cNy
Mv c`)_Md
public static void sort(int[] data) { pfx3C*
sort(data, IMPROVED_QUICK); 0l;<5
} H+
h07\?
%
private static String[] name={ x8;`i$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8Ld:"Y#
}; D>Gt]s
!v]b(z`Y
private static Sort[] impl=new Sort[]{ #,{+3Y&5-+
new InsertSort(), )
'j:
new BubbleSort(), bCZ gcN
new SelectionSort(), SWp1|.=Sm
new ShellSort(), zqDR7+]
new QuickSort(), do uc('@
new ImprovedQuickSort(), XC7%vDIt
new MergeSort(), z} '! eCl
new ImprovedMergeSort(), *m%]zj0bo
new HeapSort() $+}+zZX5
}; FgL,k
+n}$pM|NKU
public static String toString(int algorithm){ PSawMPw
return name[algorithm-1]; )otb>w5
} DO7W}WU
~Oe Ppa\
public static void sort(int[] data, int algorithm) { u *
impl[algorithm-1].sort(data); azjEq$<M
} y2O4I'/5<
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public static interface Sort { 2xw6 5z
public void sort(int[] data); kt4d;4n
} fF*`'i=!
=h(W4scgqX
public static void swap(int[] data, int i, int j) { h;5LgAY|v
int temp = data; iJnU%
data = data[j]; uP\lCqK,
data[j] = temp; Pmi#TW3X
} /~4"No@
} %!ebO*8q