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。 s ;3k#-w
插入排序: 7aF'E1e'3
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package org.rut.util.algorithm.support; y?6J%~\WP
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import org.rut.util.algorithm.SortUtil; {l
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/** '99rXw
* @author treeroot d}RU-uiW
* @since 2006-2-2 Yvi.l6JL
* @version 1.0 ?-Qq\D^+
*/ w3n6md
public class InsertSort implements SortUtil.Sort{ VyMFALSe]h
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/* (non-Javadoc) pZ`^0#Fo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dguN<yS-E
*/ BvnNAi
public void sort(int[] data) { ]$7yB3S,B
int temp; >P9|?:c
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); |e QwI&
} 3>T2k }
} [g/ &%n0^
} 7&hhKEA
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} !MyCxM6
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冒泡排序: 0Yk$f1g
NiSyb yR$
package org.rut.util.algorithm.support; mgd)wZNV
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import org.rut.util.algorithm.SortUtil; b Y2:g )
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/** V[;^{,;
* @author treeroot D_Zt:tzO
* @since 2006-2-2 O<`N0
* @version 1.0 ysH'X95
*/ l9Av@|
public class BubbleSort implements SortUtil.Sort{ LOEiV
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/* (non-Javadoc) oFi_
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `'E(L&
*/ rqWD#FB=z
public void sort(int[] data) { mVd%sWD
int temp; pf`vH`r
for(int i=0;i for(int j=data.length-1;j>i;j--){ S}3?
if(data[j] SortUtil.swap(data,j,j-1); szs.B|3X@*
} STL+tLJ
} "rnVPHnQR
} u#+Is4Vh
} [{q])P;
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} 0TqIRUz "C
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选择排序: 2AXf'IOqE
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package org.rut.util.algorithm.support; n
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import org.rut.util.algorithm.SortUtil; ,: Ij@u>)
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/** y-uSpW
* @author treeroot !8I80:e_~
* @since 2006-2-2 W+i&!'
* @version 1.0 }BWT21'-Y
*/ 5i-VnG
public class SelectionSort implements SortUtil.Sort { .wPI%5D
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/* y`Zn{mQ@[
* (non-Javadoc) Tq,dlDDOR
* S|O#KE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >W6?!ue_
*/ fuT Bh6w&
public void sort(int[] data) { d^Rea8
int temp; l\37/Z
for (int i = 0; i < data.length; i++) { EGzlRSgO
int lowIndex = i; _ZE&W
for (int j = data.length - 1; j > i; j--) { !8|?0>3)
if (data[j] < data[lowIndex]) { m$VCCDv
lowIndex = j; i,mZg+;w
} Pp.]/;
} V6&6I
SortUtil.swap(data,i,lowIndex); &hJQHlyJM0
} oxug
} _~ 3r*j
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} Y o\%53w/
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Shell排序: $ncP#6
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package org.rut.util.algorithm.support; U2
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import org.rut.util.algorithm.SortUtil; Nv=&gOy=
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/** A#gy[.Bb
* @author treeroot usw(]CnH
* @since 2006-2-2 \eXuNv_
* @version 1.0 F.AP)`6+*
*/ jP.dQj^j&
public class ShellSort implements SortUtil.Sort{ Qp-P[Tc
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/* (non-Javadoc) 7 iQa)8,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %<1_\N7
*/ g6@^n$Y
public void sort(int[] data) { QC(ce)Y
for(int i=data.length/2;i>2;i/=2){ >+@EU)
for(int j=0;j insertSort(data,j,i); 9O\yIL
} \^dYmU
} :ay`Id_tm
insertSort(data,0,1); ctR^"'u
} =WK's8FB;8
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/** :H/Rhx=
* @param data d!y_N&z|(
* @param j I.p"8I;
* @param i q&esI
*/ 'JJ :
private void insertSort(int[] data, int start, int inc) { WL;2&S/{@
int temp; vb$i00?
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); " ,]A.,
} >[<f\BN|
} 8aVj@x$'
} WyUa3$[gO
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} oTveY
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快速排序: )Mh5q&ow
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package org.rut.util.algorithm.support; .K+5k`kd
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import org.rut.util.algorithm.SortUtil; /U="~{*-R
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/** pEY zB;
* @author treeroot `&J=3x
* @since 2006-2-2 PUC:Pl77
* @version 1.0 nM`pnR_
*/ Ju_(,M-Vgr
public class QuickSort implements SortUtil.Sort{ B
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/* (non-Javadoc) \o5/, C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 'E cd\p
*/ bK|nxL
public void sort(int[] data) { j^ttTq|l
quickSort(data,0,data.length-1); G4"n`89LK
} 2lxA/.f
private void quickSort(int[] data,int i,int j){ [k=LX+w@
int pivotIndex=(i+j)/2; c
file://swap JiGS[tR
SortUtil.swap(data,pivotIndex,j); sbV_h;<
QS<)*
int k=partition(data,i-1,j,data[j]); !
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SortUtil.swap(data,k,j); >n5Kz]]%
if((k-i)>1) quickSort(data,i,k-1); "gt*k#
if((j-k)>1) quickSort(data,k+1,j); @XH@i+{B
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} F "-GhjK
/** SKVQ !^o
* @param data (~^KXJ{->
* @param i 6g"qwWZp
* @param j ORt)sn&~d
* @return kj`h{Wc[)
*/ qO>A6
private int partition(int[] data, int l, int r,int pivot) { &IFXU2t}
do{ r,ep{
p
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ?aU-Y_pMe
SortUtil.swap(data,l,r); OmaG|2u
} f1I/aR V:+
while(l SortUtil.swap(data,l,r); V.w!]{xm
return l; 67 wq8|
} @Cl1G
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} ,sn
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改进后的快速排序: ^/7Y3n!|3
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package org.rut.util.algorithm.support; 27UnH: =
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import org.rut.util.algorithm.SortUtil; N)X51;+
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/** } BnPNc[I
* @author treeroot :Q>{Y
* @since 2006-2-2 S[RVk=A1
* @version 1.0 19i [DR
*/ -nk0Q_7N
public class ImprovedQuickSort implements SortUtil.Sort { `^
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private static int MAX_STACK_SIZE=4096; |$c~Jq
private static int THRESHOLD=10; M;E$ ]Z9
/* (non-Javadoc) vFsl]|<;8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '];=1loD
*/ >>0c)uC|W
public void sort(int[] data) { ^vo]bq7
int[] stack=new int[MAX_STACK_SIZE]; 3mXRLx=0>
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int top=-1; +JY]J89
int pivot; e `Tssa+
int pivotIndex,l,r; x$24Nc1a'
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stack[++top]=0; 79>_aD9
stack[++top]=data.length-1; N"2P]Zr
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while(top>0){ ~)iQbLI
int j=stack[top--]; 1)ZdkTF@H
int i=stack[top--]; X8(WsN
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pivotIndex=(i+j)/2; IJofbuzw:
pivot=data[pivotIndex]; mf)E%qo
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SortUtil.swap(data,pivotIndex,j); iPt{v5}]
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file://partition 0vcM+ }rw
l=i-1; A@JZK+WB}
r=j; D2Dk7//82Y
do{ p`3$NCJN
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); C07 U.nzh
SortUtil.swap(data,l,r); *]* D^'
} `i3fC&?C
while(l SortUtil.swap(data,l,r); [USE&_RN
SortUtil.swap(data,l,j); ah0
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if((l-i)>THRESHOLD){ w1
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stack[++top]=i; /&G )IY]g
stack[++top]=l-1; kS$m$
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} 'Mm=<Bh
if((j-l)>THRESHOLD){ ]$?\,`
stack[++top]=l+1; =E'
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stack[++top]=j; +@5*_n\e`
} dE|luN~
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} +
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file://new InsertSort().sort(data); =hB0p^a
insertSort(data); 2Jc9}|,
} ouR(l;
/** ELQc:
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* @param data -[.A6W
*/ #gY|T|
private void insertSort(int[] data) { {aq}Q|?/
int temp; !0
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for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); "N*i!h
} keL!;q|r-)
} c9)5G+
} ~Y'j8W
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} ##clReS
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归并排序: 7T}r]C.
52d8EGC
package org.rut.util.algorithm.support; caC(KK#<
(YH/#n1"{
import org.rut.util.algorithm.SortUtil; gTjhD(
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/** E5F0C]hq
* @author treeroot I`8jJpGA
* @since 2006-2-2 '`fz|.|cbB
* @version 1.0 UAq%Y8KA
*/ J{bNx8.&
public class MergeSort implements SortUtil.Sort{ p7kH"j{xD
*QT|J6ng
/* (non-Javadoc) JOm6Zc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ' 5%`[&
*/ K]Onb{QY
public void sort(int[] data) { ;5wr5H3
int[] temp=new int[data.length]; &b7i> ()
mergeSort(data,temp,0,data.length-1); gaXKP1m^
} <UMT:`h1MZ
<OC|z3na_
private void mergeSort(int[] data,int[] temp,int l,int r){ &\/b(|>
int mid=(l+r)/2; ~M4@hG!
if(l==r) return ; u t4+c0
mergeSort(data,temp,l,mid); dn)pVti_
mergeSort(data,temp,mid+1,r); )mb RG9P
for(int i=l;i<=r;i++){ 1_z6O!rx
temp=data; Lc:DJA
} eX@7f!uz
int i1=l; @ dF]X
int i2=mid+1; /P3s.-sL
for(int cur=l;cur<=r;cur++){ 0{
;[k
if(i1==mid+1) tuiQk=[c
data[cur]=temp[i2++]; $=-Q]ld&]
else if(i2>r) bG6<=^
data[cur]=temp[i1++]; >)IXc<"wq
else if(temp[i1] data[cur]=temp[i1++]; ;y{VdT
else J|BZ{T}d
data[cur]=temp[i2++]; @~l?hf
} FTg4i\Wp
}
j{;RuNt
GqrOj++>
} |_P-
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改进后的归并排序: <?I s ~[2
j_r7oARL
package org.rut.util.algorithm.support; <XHS@|
*I(g~p
import org.rut.util.algorithm.SortUtil; f @cs<x
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/** l?/.uNw
* @author treeroot 0kD8w j%
* @since 2006-2-2 VnJ-nfA
* @version 1.0 yeCR{{B/'
*/ dLSnhZ
public class ImprovedMergeSort implements SortUtil.Sort { ;^,2
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private static final int THRESHOLD = 10; ^!*?vHx:
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/* 47iwb
* (non-Javadoc) ikGH:{
* ~Lc>~!!t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x,Cc$C~YP
*/ y%H;o?<WX
public void sort(int[] data) { >t"]gQHtx
int[] temp=new int[data.length]; )6?.; B
mergeSort(data,temp,0,data.length-1); rI:KZ}GZ
} 3"gifE
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private void mergeSort(int[] data, int[] temp, int l, int r) { ?CS
jn
int i, j, k;
:*M\z3`k
int mid = (l + r) / 2; wE75HE`gW
if (l == r) bH41#B
return; |zu>G9m
if ((mid - l) >= THRESHOLD) (%>Sln5hq
mergeSort(data, temp, l, mid); >:]fN61#
else yvxC/Jo4
insertSort(data, l, mid - l + 1); er5}=cFZ
if ((r - mid) > THRESHOLD) B-[SUmHr
mergeSort(data, temp, mid + 1, r); 'KGY;8<x]
else O#7ldF(
insertSort(data, mid + 1, r - mid); ]tZ5XS
8m A6l0
for (i = l; i <= mid; i++) { N,ik&NIWy
temp = data; H/V%DO
} P:k(=CzZ@J
for (j = 1; j <= r - mid; j++) { ~,e!t.339
temp[r - j + 1] = data[j + mid]; s/[i>`g/9
} i,")U)b
int a = temp[l]; p 8"(z@T
int b = temp[r]; gE=~.P[ZX
for (i = l, j = r, k = l; k <= r; k++) { 16N8h]l
if (a < b) { ioi
data[k] = temp[i++]; ):78GVp
a = temp; w=e,gNO
} else { Xy*X4JJh^
data[k] = temp[j--]; `^J~^Z7Y-
b = temp[j]; 8
(^2
} 0h shHv-
} K=5_jE^e
} xdo{4XY^*W
)dL?B9d:
/** N2&aU?`e
* @param data Mty]LMK
* @param l -N\{QX1Yd
* @param i N~>?w#?J
*/ }2c}y7B,_
private void insertSort(int[] data, int start, int len) { 'fAD Dh}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); RO.(k!J .
} .;KupQ;*
} !RcAJs'
} r3j8[&B"
} H9)uni
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堆排序: uBE,z>/,;
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package org.rut.util.algorithm.support; ESrWRO
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import org.rut.util.algorithm.SortUtil; iz^wBQ
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/** |(P;2q4>
* @author treeroot mW-@-5Wda
* @since 2006-2-2 =hs@W)-O
* @version 1.0 `X^e}EGWu
*/ &vF "I'V
public class HeapSort implements SortUtil.Sort{ m~U{ V9;*
8S02
3
/* (non-Javadoc) .FXQ,7mZ-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) P~qVr#eU
*/ |wb7`6g
public void sort(int[] data) { _uu:)%
MaxHeap h=new MaxHeap(); $Tur"_`I;
h.init(data); VDPN1+1*
for(int i=0;i h.remove(); *(scSC>
System.arraycopy(h.queue,1,data,0,data.length); \fKE~61
} =0)^![y]v
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private static class MaxHeap{ {;}8Z $
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void init(int[] data){ W^N"y&
this.queue=new int[data.length+1]; $ B9=v
for(int i=0;i queue[++size]=data; @iRVY|t/
fixUp(size); g7P1]CZ}
} heKI<[8l
} 0/ Ht;(
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on
private int size=0; yn#h$o<
;9PM?Iy[
private int[] queue; $aA.d^
dvD<>{U,8
public int get() { .HBvs=i
return queue[1]; W =zG
} qj6`nbZ{va
=eqI]rVj^
public void remove() { '/H(,TM
SortUtil.swap(queue,1,size--); fI1;&{f
fixDown(1); `+.I
} QC4T=E]`j
file://fixdown iW?9oe
private void fixDown(int k) { [tzSr=,Cg
int j; re!8nuBsA
while ((j = k << 1) <= size) { V</T$V$
if (j < size %26amp;%26amp; queue[j] j++; pNlisS
if (queue[k]>queue[j]) file://不用交换 !_
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break; lAk1ncx
SortUtil.swap(queue,j,k); uB1!*S1f
k = j; k^pu1g=6I
} hzLGmWN2j8
} $ t $f1?
private void fixUp(int k) { W6O.E
while (k > 1) { *?D2gaCta
int j = k >> 1; 5uo(z,WLR
if (queue[j]>queue[k]) ? ~Zrd
break; F?} *ovy
SortUtil.swap(queue,j,k); 8 uxFXQ
k = j; ({KAh?
} DH9?2)aR
} LH#LBjOZk
" B{0-H+
} WWcm(q=
]zU<=b@
} #>jH[Q
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SortUtil: oRThJ B
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package org.rut.util.algorithm; -0SuREn
bM^A9BxD
import org.rut.util.algorithm.support.BubbleSort; !otq
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import org.rut.util.algorithm.support.HeapSort; e K1m(E.=
import org.rut.util.algorithm.support.ImprovedMergeSort; 37-y
import org.rut.util.algorithm.support.ImprovedQuickSort; |D`b7h
import org.rut.util.algorithm.support.InsertSort; 4VJzs$
import org.rut.util.algorithm.support.MergeSort; Q(5:~**I
import org.rut.util.algorithm.support.QuickSort; bNjaCK<
import org.rut.util.algorithm.support.SelectionSort; @\`G & VB
import org.rut.util.algorithm.support.ShellSort; XjZao<?u
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A]>
/** &9dr+o-(~
* @author treeroot 06 Esc^D
* @since 2006-2-2 sQ:VrXwP
* @version 1.0 `J#xyDL6?
*/ O;BMwg_7
public class SortUtil { zg Y*|{4Sl
public final static int INSERT = 1; ;=VK_3"
public final static int BUBBLE = 2; 5;MK1l
public final static int SELECTION = 3; %r
public final static int SHELL = 4; Be>c)90bO_
public final static int QUICK = 5; mGpkM?Y"
public final static int IMPROVED_QUICK = 6; aQ&8fteFR
public final static int MERGE = 7; ok%a|Zz+]
public final static int IMPROVED_MERGE = 8; 2@m(XT
(
public final static int HEAP = 9; g1 Wtu*K3
`-K)K<
public static void sort(int[] data) { ssX6kgq_(
sort(data, IMPROVED_QUICK); N 1f~K.e\
} z@l!\m-
private static String[] name={ ?^48Zq6wM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" X:SzkkVl7
}; w[YkTv
Hu9-<upc&
private static Sort[] impl=new Sort[]{ {uwk[f{z
new InsertSort(), r6`^>c
new BubbleSort(), )_Xxk_
new SelectionSort(), 8~s-t
new ShellSort(), xL39>PB
new QuickSort(), M ,_^hm7
new ImprovedQuickSort(), ^tg6JB;s
new MergeSort(), x)#<.DX
new ImprovedMergeSort(), ]IHD:!Z-=
new HeapSort() 34m' ]n
}; cfC; eRgq~
,LW(mdIe(
public static String toString(int algorithm){ wwK~H
return name[algorithm-1]; =JbdsYI(
} n$m]58w
Bgk~R.l
public static void sort(int[] data, int algorithm) { =Y]'5cn{
impl[algorithm-1].sort(data); rtYb"-&
} z%}CBTm
jsqUMy-
public static interface Sort { P$(WdVG
public void sort(int[] data); CFkW@\]
} zqvRkMWc M
,Y g5X
public static void swap(int[] data, int i, int j) { i^yH?bH @~
int temp = data; l?@MUsg+
data = data[j]; `b^#quz
data[j] = temp; -
5o<Q'(
} _>jrlIfc
} <@U.