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。 Hz? ,#>{
插入排序: ArX]L$D
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package org.rut.util.algorithm.support; g]4yAV<2
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import org.rut.util.algorithm.SortUtil;
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/** I4:rie\hjC
* @author treeroot 5"uNj<.V
* @since 2006-2-2 tvCcyD%w
* @version 1.0 G<fS(q
*/ #/s7\2
public class InsertSort implements SortUtil.Sort{ kyu2)L2u
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/* (non-Javadoc) P
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?sE@]]z
*/ 6kR
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public void sort(int[] data) { UQnBqkE
int temp; xyvND
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); AHWh}~Yi
} yZ|+VXO
} "]<w x_!+}
} 1wlVz#f.
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} ajGcKyj8i
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冒泡排序: 3l$E8?[Zwi
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package org.rut.util.algorithm.support; y]7%$*
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import org.rut.util.algorithm.SortUtil; R~$hWu}}
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/** ^?nP$+gq
* @author treeroot TqXge{r
* @since 2006-2-2 S7Znz@
* @version 1.0 df^0{gNHx
*/ m^'~&!ba
public class BubbleSort implements SortUtil.Sort{ ;*nh=w
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/* (non-Javadoc) X8i[fk1.R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) x
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*/ "~_$T@^k>
public void sort(int[] data) { z+ uL "PG[
int temp; "cNg:
for(int i=0;i for(int j=data.length-1;j>i;j--){ p%tE v
if(data[j] SortUtil.swap(data,j,j-1); J}:&eS
} LNaeB(z"
} `|&\e_"DE
} y2GQN:X
} k&yQ98H$K"
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} d3og?{i<}&
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选择排序: 1]Gf)|
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package org.rut.util.algorithm.support; tc"T}huypU
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import org.rut.util.algorithm.SortUtil; -!@H["
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/** hK
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* @author treeroot 9z+vFk`
* @since 2006-2-2 $|rCrak;
* @version 1.0 Ob7zu"zr
*/ oN_S}o
public class SelectionSort implements SortUtil.Sort { ?0 HR(N(z!
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/* B^H4Q
4-
* (non-Javadoc) TFNUv<>X
* &Q2NU$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3(aRs?/O
*/ 52da]BW<
public void sort(int[] data) { b*cW<vX}~
int temp; |!{z?
i
for (int i = 0; i < data.length; i++) { GVeL~Q
int lowIndex = i; kZJt~}
for (int j = data.length - 1; j > i; j--) { T@B"BoKU
if (data[j] < data[lowIndex]) { ]^Sd9ba
lowIndex = j; Y,3z-Pa=@
} Ii|uGxEc
} Y=AH%Gy9)
SortUtil.swap(data,i,lowIndex); P;^y|0Nm
} <9=zP/Q
} &\JK%X.Jlt
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} \El|U#$u'
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Shell排序: AmP#'U5
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package org.rut.util.algorithm.support; -0{T
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import org.rut.util.algorithm.SortUtil; 2b; rr
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/** eKL]E!
* @author treeroot FgXu1-
* @since 2006-2-2 `Af{H/qiI
* @version 1.0 ]ev *m&O
*/ 8dV.nO
public class ShellSort implements SortUtil.Sort{
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/* (non-Javadoc) q>Q:X3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5x:Ift
*
*/ l[tY,Y:4qO
public void sort(int[] data) { i58ZV`Rk`
for(int i=data.length/2;i>2;i/=2){ it(LphB8
for(int j=0;j insertSort(data,j,i); \pjRv
} <m?GJuQ'
} 5}vRo;-
insertSort(data,0,1);
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} 3r,1^h
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/** z7OZ4R:
* @param data X=rc3~}f
* @param j ^n\9AE3
* @param i ]jHh7> D
*/ 1{SrHdD=
private void insertSort(int[] data, int start, int inc) { 1x~%Ydy
int temp; AyQS4A.s[
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); 7Vz[ji
} ovhC42i
} .8u$z`j
} [VY8?y
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} dzjB UD
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快速排序: 8m#}S\m
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package org.rut.util.algorithm.support; -/(DPx
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import org.rut.util.algorithm.SortUtil; )GiFkG
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/** %NF<bEV
* @author treeroot ]`#xR*a
* @since 2006-2-2 X_lUD?y
* @version 1.0 p9FA_(`^
*/ t,--V|7-
public class QuickSort implements SortUtil.Sort{ N0y;PVAGu
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/* (non-Javadoc) &&(4n?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kPx]u\
*/ }};j2
public void sort(int[] data) { Wo:zU
quickSort(data,0,data.length-1); Bi9
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} ^@|<'g.R-
private void quickSort(int[] data,int i,int j){ 2ru*#Z#(
int pivotIndex=(i+j)/2; ql#{=oGDnA
file://swap c]AKeq]
SortUtil.swap(data,pivotIndex,j); tJ?qcT?
8{}Pj
int k=partition(data,i-1,j,data[j]); w>NZRP_3
SortUtil.swap(data,k,j); ZYwBw:y}y
if((k-i)>1) quickSort(data,i,k-1); <;$Sa's,LE
if((j-k)>1) quickSort(data,k+1,j); ue6/EN;}
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} Nt`F0
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/** 'Yaf\Hp
* @param data )#b}qc#`
* @param i JEK%yMj
* @param j Jf%!I
* @return x*loACee.
*/ ++J Bbuzj!
private int partition(int[] data, int l, int r,int pivot) { vxbH^b
do{
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while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); 'mBLf&fB
SortUtil.swap(data,l,r); ND9n1WZ&x
} .-C+0L1j
while(l SortUtil.swap(data,l,r); wS F!Xx0
return l; C,OB3y
} qHC*$v#.V?
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} :|3"H&FWK
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改进后的快速排序: zn2"swhq\V
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package org.rut.util.algorithm.support; N8DiEB3~
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import org.rut.util.algorithm.SortUtil; E5Snl#Gl\0
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/** tK s4}vW
* @author treeroot Pq{YZMr
* @since 2006-2-2 LhVLsa(-%
* @version 1.0 cjy0s+>>
*/ y7;XOPm
public class ImprovedQuickSort implements SortUtil.Sort { >n$EeJ
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private static int MAX_STACK_SIZE=4096; $X.'W\o|
private static int THRESHOLD=10; '$kS]U
/* (non-Javadoc) \0*yxSg,^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G
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*/ WoClTb>F
public void sort(int[] data) { AT8B!m
int[] stack=new int[MAX_STACK_SIZE]; fr,CH{Uq
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int top=-1; ys.!S.k+
int pivot; U"%8"G0)
int pivotIndex,l,r; QAOk
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stack[++top]=0; -+
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stack[++top]=data.length-1; H z< M
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while(top>0){ tI!R5q;k
int j=stack[top--]; .f.j >
int i=stack[top--]; 93Ci$#<y
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pivotIndex=(i+j)/2; 6Ymo%OT
pivot=data[pivotIndex]; (W}i287
66"ZH,335
SortUtil.swap(data,pivotIndex,j); |$|n V^y
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file://partition 7z P
l=i-1; d=+Lv<
r=j; c J"]yG)=
do{ t-<[._:+
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); 7"CH\*%
SortUtil.swap(data,l,r); ! 4^L $
} R=Ly49
while(l SortUtil.swap(data,l,r); h}B# 'e
SortUtil.swap(data,l,j); k`4\.m"&
}Bod#|`
if((l-i)>THRESHOLD){ gx>mKSzy
stack[++top]=i; ;u-< {2P
stack[++top]=l-1; Fp|rMq
} <2@<r
t{
if((j-l)>THRESHOLD){ nO.+&kA
stack[++top]=l+1; RWh}?vs_
stack[++top]=j; M:Y!k<p
} ~NW5+M(u
##+8GLQM
} koWb@V]
file://new InsertSort().sort(data); $d??(
insertSort(data); ,LPFb6o
} F0ivL`
/** A@Yi{&D_Q]
* @param data )'I<xx'1
*/ iN9!?Ov_
private void insertSort(int[] data) { 7!yF5+_d
int temp; \3:{LOr%*
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Z FrXw+
} d<cbp[3F
} vheAh`u^&
} PM?Ri^55<L
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} K'rs9v"K|
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归并排序: .N><yQ-j3'
Hr,lA(
package org.rut.util.algorithm.support; czsoD)N
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import org.rut.util.algorithm.SortUtil;
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/** Ly/~N/<\
* @author treeroot 8}`8lOE7
* @since 2006-2-2 mS;Q8Crh
* @version 1.0 2F@<{v4
*/ {kO:HhUg
public class MergeSort implements SortUtil.Sort{ KZ/^gR\d
kX .1#%Ex
/* (non-Javadoc) ZC-evy
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m3!MHe~t
*/ \hD
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public void sort(int[] data) { `TR9GWU+B
int[] temp=new int[data.length]; &$Ip$"H
mergeSort(data,temp,0,data.length-1); ej53O/hP
} ^p%+r B.j[
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private void mergeSort(int[] data,int[] temp,int l,int r){ :<3;7R'5
int mid=(l+r)/2; | BWK"G
if(l==r) return ; NP`ll0s
mergeSort(data,temp,l,mid); GT}#iM
mergeSort(data,temp,mid+1,r); NbMH@6%E
for(int i=l;i<=r;i++){ F7u%oLjr
temp=data; .{ L m
} {YLJKu!M
int i1=l; `l40awGCz
int i2=mid+1; 6C}Z1lZl
for(int cur=l;cur<=r;cur++){
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if(i1==mid+1) S5vMP
N
data[cur]=temp[i2++]; 2>$L>2$
else if(i2>r) TbM*?\7
data[cur]=temp[i1++]; znpZ0O\!
else if(temp[i1] data[cur]=temp[i1++]; \>k#]4@rp
else j~>
#{"C
data[cur]=temp[i2++]; .5 r0%
} I}3K,w/7mi
} `erQp0fBM
iEO2Bil]
} o6%f%:&
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改进后的归并排序: ~OfKn1D
8j+;Xlh
package org.rut.util.algorithm.support; E1[%~Cpw*
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import org.rut.util.algorithm.SortUtil; P?ol]MwaB
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/** 5WG@ ;K%
* @author treeroot FJ.
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* @since 2006-2-2 0kEq|k9
* @version 1.0 1S@k=EKM
*/ e.h:9`"*
public class ImprovedMergeSort implements SortUtil.Sort { ;!Bkk9r"H
N/.9Aj/h~&
private static final int THRESHOLD = 10; $$>,2^qr&L
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/* q@>
m~R
* (non-Javadoc) AG=1TZI"
* .6(i5K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) =~*u(0sJa
*/ `/iN%ZKum
public void sort(int[] data) { w-/Tb~#E
int[] temp=new int[data.length]; k{8N@&D
mergeSort(data,temp,0,data.length-1); y['icGU6
} 0$
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private void mergeSort(int[] data, int[] temp, int l, int r) { .=D6<4#t
int i, j, k; HX[#tT|m~
int mid = (l + r) / 2; !%=k/|#
if (l == r) Jl}7]cVq#
return; )E|Bb=%
if ((mid - l) >= THRESHOLD) b`=rd 4cpU
mergeSort(data, temp, l, mid); AS
u l
else Rh^$0Q*2
insertSort(data, l, mid - l + 1); ea/6$f9^
if ((r - mid) > THRESHOLD) fA5#
2P{
mergeSort(data, temp, mid + 1, r); KcE=m\ h
else ],m-,K
insertSort(data, mid + 1, r - mid); ^a
r9$$~/!
)/w2]d/9
for (i = l; i <= mid; i++) { nwYeOa/t
temp = data; q3t@)+l>*
} xCD+qP^
for (j = 1; j <= r - mid; j++) { l0V@19Ec
temp[r - j + 1] = data[j + mid]; !Ai;S
} Pr"ESd>Y
int a = temp[l]; +ZO*~.zZ
int b = temp[r]; C2T,1 =
for (i = l, j = r, k = l; k <= r; k++) { Z )I4U
if (a < b) { \/%mabLK
data[k] = temp[i++]; lRq!|.C
a = temp; hR2.w/2j
} else { 9:WKG'E8a
data[k] = temp[j--]; Ar_/9@n
b = temp[j]; 12E"6E)
} WJWrLu92\U
} +iR;D$w
} A_+WY|#M
Bf.RYLsh6
/** |k0VJi
* @param data 1zffPC8jl
* @param l !.A>)+AK
* @param i 1Ppzch7
*/ - =Hr|AhE
private void insertSort(int[] data, int start, int len) { :0l(Ll KD
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6lGL.m'Ra
} &W%TY:Da|
} zq#o8))4X
} $}829<gh7
}
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堆排序: ~tWBCq 6
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package org.rut.util.algorithm.support; b< rM3P;
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import org.rut.util.algorithm.SortUtil; uE2Yn`Ha
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/** .T7ciD
* @author treeroot "T'!cy
* @since 2006-2-2 C o M8
* @version 1.0 N=kACEo
*/ We`axkC
public class HeapSort implements SortUtil.Sort{ lZ|Ao0(
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/* (non-Javadoc) j(SQNSFD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
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*/ (8{Z@
public void sort(int[] data) { l/]P6 @N
MaxHeap h=new MaxHeap(); $t]DxMd
h.init(data); R#t~i&v/
for(int i=0;i h.remove(); ^ZsME,
System.arraycopy(h.queue,1,data,0,data.length); _R]1J0
} &sW/r::,
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private static class MaxHeap{ +$9w[ARN+
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void init(int[] data){ *?uF&( 0
this.queue=new int[data.length+1]; _tjH=Ff$
for(int i=0;i queue[++size]=data; Djzb#M'm
fixUp(size); Yv{AoL~
} 3|A"CU/z@
} D@Q|QY5qic
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private int size=0; ?vhW`LXNB
2`z+_DA
private int[] queue; 2XE4w# [j
h1BdASn_
public int get() { @/9>
/?JP
return queue[1]; UkdQ#b1
} %VdJ<=@
XdB8Oj~~
public void remove() { A_2ppEG
SortUtil.swap(queue,1,size--); X9P-fF?0
fixDown(1); -Ju!2by
} *33Zt+
file://fixdown ,+JAwII>O
private void fixDown(int k) { }/=VnCfU
int j; <%!@cE+y
while ((j = k << 1) <= size) { /q> "">
if (j < size %26amp;%26amp; queue[j] j++; JsH9IK:
if (queue[k]>queue[j]) file://不用交换 /g_}5s-Z
break; ak'RV*>mT
SortUtil.swap(queue,j,k); Fv3fad@x
k = j; |ey6Czm
} SDot0`s>
} 4Fnr8 r8W
private void fixUp(int k) { (j'[t
while (k > 1) { [1E u6X6
int j = k >> 1; U*6r".sz
if (queue[j]>queue[k]) <AB]FBo(
break; <)rol
SortUtil.swap(queue,j,k); _/KN98+
k = j; l9-(ofY*J
} xL mo?Y*
} Jo2:0<VL
?gTY!;$P
} )O_Y(^+ $
|n~-LH++
} 2?HLEiI1
(pAGS{{
SortUtil: t,&1~_9
pwm]2}+
package org.rut.util.algorithm;
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import org.rut.util.algorithm.support.BubbleSort; =n9|r.\&uJ
import org.rut.util.algorithm.support.HeapSort; h_H$+!Nzb
import org.rut.util.algorithm.support.ImprovedMergeSort; n&&X{Rl
import org.rut.util.algorithm.support.ImprovedQuickSort; +Ge-!&.;A
import org.rut.util.algorithm.support.InsertSort; @q|I$'K]x
import org.rut.util.algorithm.support.MergeSort; $yG=exh3v
import org.rut.util.algorithm.support.QuickSort; uP<tP:
import org.rut.util.algorithm.support.SelectionSort; *;Sj&O
import org.rut.util.algorithm.support.ShellSort; \= i>}Sg
$O=m/l$
/** 85-00m ~
* @author treeroot S)p1[&" M
* @since 2006-2-2 rtC.!].;%
* @version 1.0 H:2#/1Oz>
*/ wU+-;C5e
public class SortUtil { 1^$ vmULj
public final static int INSERT = 1; <w<&,xM
public final static int BUBBLE = 2; Y=\;$:L[
public final static int SELECTION = 3; d/N&bTg:
public final static int SHELL = 4; WF`y j%0
public final static int QUICK = 5; X)x$h{ OE
public final static int IMPROVED_QUICK = 6; oF8#gn_
public final static int MERGE = 7; 8Y_wS&eB
public final static int IMPROVED_MERGE = 8; Fn1|Wt*
public final static int HEAP = 9; xXQDHc-Ba
6]1cy&SG
public static void sort(int[] data) { :OQx;>'
sort(data, IMPROVED_QUICK); cl/}PmYIZ
} 0"3l2Eo
private static String[] name={ %9C_p]P*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 09HlL=0q
}; GB&<+5t2
:VGvL"Kro
private static Sort[] impl=new Sort[]{ :/A3l=}iV
new InsertSort(), ef *Vs
new BubbleSort(), ;%{REa
new SelectionSort(), Db3#;
new ShellSort(), "Y-_83
new QuickSort(), Ahv %Q%m%2
new ImprovedQuickSort(), w7+3?'L
new MergeSort(), P;GRk6
new ImprovedMergeSort(), s"gNHp.oF
new HeapSort() 2 ,RO
}; OTwIR<_B+
VB=$D|Ll
public static String toString(int algorithm){ ^--kcTiR%
return name[algorithm-1]; RE6dN
} mhpaPin*JS
wA$ JDf)Vg
public static void sort(int[] data, int algorithm) { tX)l_?jVH
impl[algorithm-1].sort(data); Jvac|rN
} xL&M8:
)"KKBil0
public static interface Sort { Q#M@!&
public void sort(int[] data); $S Kax#[
} kMd1)6%6A
p`N+9t&I4
public static void swap(int[] data, int i, int j) { #s%_ L
int temp = data; "=H(\V
data = data[j]; tr?U/YG
data[j] = temp; ' m^nKG$"
} meJ%mY
} ' ?tx?t