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。 *aS|4M-
插入排序: -w=rNlj
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package org.rut.util.algorithm.support; k!t5>kPSQ
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import org.rut.util.algorithm.SortUtil; I:uxj%
/** &D[dDUdHs
* @author treeroot n_AW0i.
* @since 2006-2-2 D; H</5#Q
* @version 1.0 SG
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*/ l!Z>QE`.S
public class InsertSort implements SortUtil.Sort{ vLDMa>
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/* (non-Javadoc) c)#b*k,lw<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r-'\<d(J$
*/ 'IFbD["r
public void sort(int[] data) { 5&v'aiWK
int temp; 2W|4
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); $@Zb]gavt?
} %;^[WT`,
} `x~k}
} LPb43
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} ] $$ciFM
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冒泡排序: E,shTh%&~
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package org.rut.util.algorithm.support; i' %V}2
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import org.rut.util.algorithm.SortUtil; &at>pV3_
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/** Zg5@l3w
* @author treeroot ]x:>~0/L
* @since 2006-2-2 .^I,C!O#
* @version 1.0 SEr\ u#
*/ kWjCSC>jA
public class BubbleSort implements SortUtil.Sort{ )AXTi4MNp
r-^Ju6w{
/* (non-Javadoc) $n(?oyf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z(g4D!
*/ z[0L?~$
public void sort(int[] data) { 6aK'%K
int temp; gmLGK1
for(int i=0;i for(int j=data.length-1;j>i;j--){ L:%ek3SOz
if(data[j] SortUtil.swap(data,j,j-1); RQy|W}d_
} =y,_FFoS
} .(VxeF(v_k
} ^(V!vI*
} ?#ndMv!$
<4^ _dJ9=
} @za?<G>!'e
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选择排序: 9x ?" %b
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package org.rut.util.algorithm.support; kMo;<Z
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import org.rut.util.algorithm.SortUtil; cm%QV?
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/** j1v fp"J1
* @author treeroot *hF5cM[
* @since 2006-2-2 6?+bi\6
* @version 1.0 [ k^6#TQcn
*/ 8~ .r/!wfy
public class SelectionSort implements SortUtil.Sort { JiDX|Q<c
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/* Za jQ B
* (non-Javadoc) &1F)/$,v
* 09_3`K.*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9^4^EY#
*/ @+syD
public void sort(int[] data) { H_ .@{8I
int temp; 0jrcXN~
for (int i = 0; i < data.length; i++) { Fq&@dxN3
int lowIndex = i;
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for (int j = data.length - 1; j > i; j--) { }bIEW ho
if (data[j] < data[lowIndex]) { I= x
lowIndex = j; /cJ$`
pN
} x(hUQu 6
} jsf=S{^2
SortUtil.swap(data,i,lowIndex); `;(/Wh
} ZJP.-` U
} GTYGm
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} cwz
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Shell排序: Pgr>qcbql
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package org.rut.util.algorithm.support; bNFX+GA/
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import org.rut.util.algorithm.SortUtil; 7_E+y$i=
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/** 3+{hO@O
* @author treeroot WWrDr
* @since 2006-2-2 !!o69
* @version 1.0 CYEqH2"3
*/ YXg:cXE8e
public class ShellSort implements SortUtil.Sort{ _:c8YJEG{
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/* (non-Javadoc) y`mE sj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *.Y!ZaK
*/ @xtcjB9
public void sort(int[] data) { L
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for(int i=data.length/2;i>2;i/=2){ =Q.2:*d.
for(int j=0;j insertSort(data,j,i); OB6I8n XW
} l#~Sh3@L(
} {u9(qd;;
insertSort(data,0,1); hAfR Hd
} )}~k7bb}Y
NX@TWBn%
/** vo!:uvy;2
* @param data dB<BEe\$g.
* @param j Z A1?'
* @param i qOZc}J0
*/ _S,2j_R9
private void insertSort(int[] data, int start, int inc) { \&2GLBKpe
int temp; 6 [a CjW
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); Ny*M{}E
} (FH4\ 't)
} C(}9
} 6DaH+
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NiH
} ?5$\8gZ
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快速排序: J0d +q!
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package org.rut.util.algorithm.support; 89`AF1
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import org.rut.util.algorithm.SortUtil; |ng[s6uf
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/** x@v,qF$K
* @author treeroot ;?=nr 5;q
* @since 2006-2-2 KT{<iz_
* @version 1.0 OJ@';ZyT=
*/ }s}b]v
public class QuickSort implements SortUtil.Sort{ &KbtW_
M[Y|$I}
/* (non-Javadoc) 9w11kut-!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -66|Y
*/ "LaNXZ9
public void sort(int[] data) { z.e%AcX
quickSort(data,0,data.length-1); 1
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1
}
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private void quickSort(int[] data,int i,int j){ Tl8S|Rg
int pivotIndex=(i+j)/2; NvJu)gI%
file://swap z|+L>O-8
SortUtil.swap(data,pivotIndex,j); DcSL f4A
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int k=partition(data,i-1,j,data[j]); 1^!=J<`K;
SortUtil.swap(data,k,j); kQ.atr`? e
if((k-i)>1) quickSort(data,i,k-1); EVgn^,
if((j-k)>1) quickSort(data,k+1,j); =ub&@~E
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} ?7^('
/** .N_0rPO,Kw
* @param data *S~. KW [
* @param i jtQ2vJ-
* @param j |A'8 'z&q
* @return ^=OjsN
*/ t
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private int partition(int[] data, int l, int r,int pivot) { Jc`LUJT
do{ Ip.5I!h[Xb
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 7Ar4:iNvX
SortUtil.swap(data,l,r); *:
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} %j2YCV7
while(l SortUtil.swap(data,l,r); eK/[jxNO
return l; =c-j4xna>
} JP!$uK{u
pSE"]N
} S;+bQ.
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改进后的快速排序: ;lW0p8
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package org.rut.util.algorithm.support; K+ ufcct
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import org.rut.util.algorithm.SortUtil; pA(@gisg
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/** k-e_lSYk&c
* @author treeroot LNXhzW
* @since 2006-2-2 NjYpNd?g
* @version 1.0 #96E^%:zL
*/ ,_u8y&<|I
public class ImprovedQuickSort implements SortUtil.Sort { ;OPz T9
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private static int MAX_STACK_SIZE=4096; lsJ'dS
private static int THRESHOLD=10; tz1iabZ{
/* (non-Javadoc) h(GgkTj4+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "* %=k%'
*/ hJhdHy=U
public void sort(int[] data) { NkNw9?:#4
int[] stack=new int[MAX_STACK_SIZE]; Wf0ui1@
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int top=-1; ln9MVF'!&
int pivot; ^Bm9yR
int pivotIndex,l,r; ^tc@bsUF
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stack[++top]=0; [K&O]s<Y
stack[++top]=data.length-1; [g&Q_+,j
8*>6+"w
while(top>0){ [7|}h/
int j=stack[top--]; ;op+~@*!
int i=stack[top--]; c!{.BgGN
pR`.8MMc8
pivotIndex=(i+j)/2; FEU$D\1y
pivot=data[pivotIndex]; Lkqu"V
[rqq*_eB
SortUtil.swap(data,pivotIndex,j); lQi2ym?
-("79v>#
file://partition Pa0tf:
l=i-1; | =N8X
r=j; s67$tlV
do{ ;Qk* h'}f
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 5T8X2fS:
SortUtil.swap(data,l,r); 6M+~{9(S
} *=@Z\]"?
while(l SortUtil.swap(data,l,r); CM9+h;Zm
SortUtil.swap(data,l,j); &>L\unS
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if((l-i)>THRESHOLD){ [A*vl9=
stack[++top]=i; 7lR(6ka&/
stack[++top]=l-1; P1Re7/
} EJdq"6S
if((j-l)>THRESHOLD){ 3"I 1'+
stack[++top]=l+1; *7BY$q
stack[++top]=j; Q}\,7l
} 7 &GhJ^Ku
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} =Q3Go8b4HJ
file://new InsertSort().sort(data); <mrLld#_:C
insertSort(data); 9DKmXL
} g@B9i=
/** #\%GrtM
* @param data P*I\FV
*/ aOWbIS[8
private void insertSort(int[] data) { 6st(s@>
int temp; hLx*$Z>
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 2[j|:Ng7
} <(3Uu()
} OEdp:dW|
} r-4I{GPb
0 I;>du
} "9kEqz4a
J
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归并排序: VR*5}Qp
q_cqjly<
package org.rut.util.algorithm.support; PJO;[:
.I
0S/&^
import org.rut.util.algorithm.SortUtil; mUcHsCszH
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/** .N/4+[2p(
* @author treeroot /~gM,*
* @since 2006-2-2 R;I}#b cJ
* @version 1.0 6<rc]T'|
*/ !l.Rv_o<O
public class MergeSort implements SortUtil.Sort{ sE>'~+1_O
z_A%>E4
/* (non-Javadoc) WYEvW<Hv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 47$JN}qI0
*/ /R9>\}.yJ
public void sort(int[] data) { [h%_` 8z
int[] temp=new int[data.length]; {'>X6:
mergeSort(data,temp,0,data.length-1); 9Ki86
} .}Bb
:*@
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private void mergeSort(int[] data,int[] temp,int l,int r){ 0A5xG&
int mid=(l+r)/2; "=4=Q\0PT
if(l==r) return ; w$61+KH K
mergeSort(data,temp,l,mid); b$rBxe\
mergeSort(data,temp,mid+1,r); 1REq.%/=
for(int i=l;i<=r;i++){ ]r|.\}2Y7
temp=data; _@?]!J[
} mI0|lp 1$
int i1=l; ks(PH6:]<
int i2=mid+1; pSV
8!
for(int cur=l;cur<=r;cur++){ z81I2?v[Jr
if(i1==mid+1) BtU,1`El5
data[cur]=temp[i2++]; r~t&;yRv
else if(i2>r) 4XX21<yn
data[cur]=temp[i1++]; M7jDV|Go
else if(temp[i1] data[cur]=temp[i1++]; R8":1 #&
else mN@0lfk;
data[cur]=temp[i2++]; :*}tkr4&eh
} c{FvMV2em
} >A2&
Mjo
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} P d*}0a~
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改进后的归并排序: b!7"drge:
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package org.rut.util.algorithm.support; xu&
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import org.rut.util.algorithm.SortUtil; H(?z?2b p
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/** !aLByMA
* @author treeroot \ZCc~muR
* @since 2006-2-2 )o9CFhFB
* @version 1.0 ap;*qiNFQ
*/ i$%;z~#wW
public class ImprovedMergeSort implements SortUtil.Sort { (Ca\$p7/
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private static final int THRESHOLD = 10; K")-P9I6-f
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/* 8)R)h/E>
* (non-Javadoc) (">!vz
* sjShm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %9Ulgs8 =
*/ 9J2%9,^
public void sort(int[] data) { C_'Ug
int[] temp=new int[data.length]; 9W'#4
mergeSort(data,temp,0,data.length-1); 3z~zcQ^\
} /\#qz.c2K
o Q{gh$6*
private void mergeSort(int[] data, int[] temp, int l, int r) { 9D8el}uHf
int i, j, k; ;y"E}h
int mid = (l + r) / 2; 2"V?+Hhz
if (l == r) #c?\(qjWA
return; eDTEy;^o
if ((mid - l) >= THRESHOLD) eZP"M6
mergeSort(data, temp, l, mid); ';b/D
else (qB$I\
insertSort(data, l, mid - l + 1); QdDdrR^&
if ((r - mid) > THRESHOLD) 8iX?4qj{P
mergeSort(data, temp, mid + 1, r); PPE:@!u<
else ,JVD ;u
insertSort(data, mid + 1, r - mid); }\l5|Ft[!
QD"V=}'?
for (i = l; i <= mid; i++) { Q@]#fW\Y
temp = data; M%9PVePOe
} k}jH
for (j = 1; j <= r - mid; j++) { ~rn82an@G
temp[r - j + 1] = data[j + mid]; )G*Hl^Z;4
} eJ7A.O
int a = temp[l]; 3n6_yK+D
int b = temp[r]; *h-nI=
for (i = l, j = r, k = l; k <= r; k++) { W.0dGUi*
if (a < b) { tQ=U22&7
data[k] = temp[i++]; Gi;eDrgj~
a = temp; }Qg9l|
} else { 4P2)fLmc
data[k] = temp[j--]; #( X4M{I
b = temp[j]; z,DEBRT+
} lza'l
} hiP^*5h
} -V4@BKI8
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/** v?d~H`L
* @param data chfj|Ce]x
* @param l $ n
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* @param i $i~DUT(
*/ Pf@8C{I
private void insertSort(int[] data, int start, int len) { k[G? 22t
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Cww$ A %}
} _W?}%;
} ze,HNFg@>
} ,|T
} s(wbsRVP8
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堆排序: .
6Bz48*
S ._9
package org.rut.util.algorithm.support; 7,Z%rqf\)
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import org.rut.util.algorithm.SortUtil; H!oP!rzEo
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/** H>_%ZXL
* @author treeroot YSv\T '3
* @since 2006-2-2 bU_9GGG|
* @version 1.0 HjV83S;
*/ :K2N7?shA
public class HeapSort implements SortUtil.Sort{ Q1s`d?P/`
&t%ICz&3
/* (non-Javadoc) |\N[EM%.@
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .c~;/@{
*/ j.ANBE96>
public void sort(int[] data) { 2r[Q$GPM<
MaxHeap h=new MaxHeap(); fqvA0"tv
h.init(data); N}\$i&Vi
for(int i=0;i h.remove(); 3go!P])
System.arraycopy(h.queue,1,data,0,data.length); yfuvU2nVH
} y;#p=,r
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private static class MaxHeap{ <qHwY.
s u![ST(
void init(int[] data){ wIi(p5*
this.queue=new int[data.length+1]; m<"1*d~
for(int i=0;i queue[++size]=data; `2S%l,>)#
fixUp(size); M,cI0i
} MLa]s*
; d
} BflF*-s ^
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private int size=0; u%h]k ,(E
|h6)p;`gc
private int[] queue; "kf7??Z
m,*t}j0 7
public int get() { 1Pn!{ bU3@
return queue[1]; ;~/
} o+6Y/6Xp@
vxbO>c
public void remove() { V-J\!CHX
SortUtil.swap(queue,1,size--); B.{0,bW?
fixDown(1); .hT^7|Jz[
} WY<ip<
file://fixdown <}i\fJX6
private void fixDown(int k) { Q"QrbU
int j; Cn+TcdHX
while ((j = k << 1) <= size) { =EV8~hMyqh
if (j < size %26amp;%26amp; queue[j] j++; I9tdr<
if (queue[k]>queue[j]) file://不用交换 qYbod+UX
break; ^#gGA_H
SortUtil.swap(queue,j,k); \n+`~< i
k = j; B>9D@fmzs
} bjD0y
cB[
} Xo]FOJ5
private void fixUp(int k) { H(n_g
QAX
while (k > 1) { 7J0PO}N
int j = k >> 1; s
g6
if (queue[j]>queue[k]) S{fNeK
break; C7)].vUN
SortUtil.swap(queue,j,k); l^"gpO${K
k = j; Kd^
._
} 9J l9\y9
} G0a UZCw
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} dR $@vDm
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} ~EX/IIa{
*:GoS?Ma
SortUtil: Yckl,g_
C]eb=rw$
package org.rut.util.algorithm; shP,-Vs#
#gi&pR'$
import org.rut.util.algorithm.support.BubbleSort; ydoCoD
w
import org.rut.util.algorithm.support.HeapSort; u~a<Psp&|
import org.rut.util.algorithm.support.ImprovedMergeSort; 'nW:2(J
import org.rut.util.algorithm.support.ImprovedQuickSort; R},mq&f5
import org.rut.util.algorithm.support.InsertSort; 2b3x|9o8
import org.rut.util.algorithm.support.MergeSort; Hyc19|
import org.rut.util.algorithm.support.QuickSort;
W)j/[
import org.rut.util.algorithm.support.SelectionSort; FDpNM\SR1l
import org.rut.util.algorithm.support.ShellSort; DAc jx:~
/z5j.TMs
/** kj+AsQC,
* @author treeroot umD .
* @since 2006-2-2 `[Z?&'CRQ
* @version 1.0 oh,Nu_!
*/ .VWH
public class SortUtil { S@T>u,t'
public final static int INSERT = 1; +gK7`:v4O*
public final static int BUBBLE = 2; dHd{9ftyF
public final static int SELECTION = 3; x!LUhX '
public final static int SHELL = 4; <fN?=u+
public final static int QUICK = 5; u3"F7
lJ
public final static int IMPROVED_QUICK = 6; X8?|5$Ey
public final static int MERGE = 7; 4sROMk=l
public final static int IMPROVED_MERGE = 8; [+ 1([#
public final static int HEAP = 9; 0'aZ*ozk
uXtfP?3Vy
public static void sort(int[] data) { =C5[75z#+
sort(data, IMPROVED_QUICK); [(UQQa=+
} uw;s](~E
private static String[] name={ H^'EY:|
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" .>h|e_E
}; ^VoQGP/cl
>;0z-;k6
private static Sort[] impl=new Sort[]{ 4[rD|
new InsertSort(), 9u"im+=:
new BubbleSort(), !4-NbtT
new SelectionSort(), Z`<
+8e
new ShellSort(), _mFb+8C
new QuickSort(), 21w<8:Vg
new ImprovedQuickSort(), I"Y?vj9]
new MergeSort(),
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new ImprovedMergeSort(), 7|"11^q
new HeapSort() D`,@EW].
}; C^l)n!fq
evtn/.kDR
public static String toString(int algorithm){
O `rrg~6#
return name[algorithm-1]; \/{qE hP
} S.M< (
jZ.+b
j >
public static void sort(int[] data, int algorithm) { +ZGOv,l
impl[algorithm-1].sort(data); NE3G!qxL
} +.[#C5
gy~M]u{
public static interface Sort { :n>:*e@w%
public void sort(int[] data); r\_aux^z
} 'VR5>r
7.akp
public static void swap(int[] data, int i, int j) { )M^;6S
int temp = data; b]CJf8'u
data = data[j]; M`iJ6L
data[j] = temp; qfN<w&P
} vWzNsWPK"{
} PMkwY{.u