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。 [{p?BTs
插入排序: .cT$h?+jyl
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package org.rut.util.algorithm.support; ym*#ZE`B!
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import org.rut.util.algorithm.SortUtil; z?uQlm*We
/** h[je _^5
* @author treeroot e|5B1rMM
* @since 2006-2-2 &PBWJ?@O)r
* @version 1.0 _h=<_Z
*/ F `pyhc>1;
public class InsertSort implements SortUtil.Sort{ .H(}[eG_
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/* (non-Javadoc) _
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ),p]n
*/ f-v ND'@
public void sort(int[] data) { *fvI.cKiGP
int temp; 3w^J"O/T
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); ~?`9i>3W~
} W`/jz/
} Fe&n,
} ^I'Lw
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} -4y)qGb*?
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冒泡排序: lQ<#jxp
tU)r[2H2
package org.rut.util.algorithm.support; }OP%p/eY
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import org.rut.util.algorithm.SortUtil; [Z5}2gB&
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/** CdzkMVH
* @author treeroot + 1+A3
* @since 2006-2-2 =2g[tsY
* @version 1.0 =JbdsYI(
*/ Ic{'H2~4,
public class BubbleSort implements SortUtil.Sort{ SD|4ybK>d
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/* (non-Javadoc) =Y]'5cn{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qtdxMX]iR
*/ VO @
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public void sort(int[] data) { zy5s$f1IA
int temp; EN-8uY.
for(int i=0;i for(int j=data.length-1;j>i;j--){ /H jI=263
if(data[j] SortUtil.swap(data,j,j-1); ek(kY6x:
} }/7.+yD
} CFkW@\]
}
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} k67i`f=
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} nv_m!JG7
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选择排序: a_ 9 |xI
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package org.rut.util.algorithm.support; J/]o WC`u
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import org.rut.util.algorithm.SortUtil; 9N*S-Po=
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/** KB%j! ?
* @author treeroot yd0=h7s
* @since 2006-2-2 >ggk>s|
* @version 1.0 a9?
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*/ &e HM#as
public class SelectionSort implements SortUtil.Sort { KD%xo/Z.
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/* cwM#X;FGq
* (non-Javadoc) @Hspg^
* F=
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @pqY9_:P1
*/ J+3\2D?
public void sort(int[] data) { nl)_`8=
int temp; "q9~C
for (int i = 0; i < data.length; i++) { NRHr6!f>
int lowIndex = i; ,u?wYW;
for (int j = data.length - 1; j > i; j--) { BGlGpl
if (data[j] < data[lowIndex]) { Gs_*/E7,
lowIndex = j; 8m/FKO (r
} hapB! ~M?
} HsjELbH
SortUtil.swap(data,i,lowIndex); p@cfY]<7
} 5eiZs
} PmPyb>HK=P
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} bxd3
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Shell排序: q9W~7
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; 5YTb7M
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/** 2y9:'c|
* @author treeroot cS"f
* @since 2006-2-2 iXUWIgr
* @version 1.0 ":UWowJO
*/ 2X qTyf<
public class ShellSort implements SortUtil.Sort{ pY{; Yn&t
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/* (non-Javadoc) rQu
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +Fc ET
*/ ou<S)_|Iu
public void sort(int[] data) { N`,7 FI}
for(int i=data.length/2;i>2;i/=2){ 5 `4}A%@&
for(int j=0;j insertSort(data,j,i); kP!%|&w;
} Tm%$J
} ;=5@h!@R
insertSort(data,0,1); Y=P9:unG
} -:)DX++
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/** =&di4'`
* @param data b34zhZ
* @param j 2x7(}+eD
* @param i c&E*KfOG
*/ c[(yU#@
private void insertSort(int[] data, int start, int inc) { /#-,R,Q
int temp; o/tVcv
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); C-s>1\I
} 3+CSQb8
} 8fJR{jD(s
} ~/^y.SsWM
/[\6oa
} <u6c2!I{
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快速排序: .@y{)/
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package org.rut.util.algorithm.support; 6@"Vqm|HD
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import org.rut.util.algorithm.SortUtil; o\_
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/** gbY LA a
* @author treeroot W0VA'W
* @since 2006-2-2 D3<IuWeM
* @version 1.0 >}ro[x`K
*/ 9b?i
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public class QuickSort implements SortUtil.Sort{ [Xxw]C6\>(
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/* (non-Javadoc) e(?:g@]-r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6?53q e
*/ GLo\q:5A
public void sort(int[] data) { 0L!er%GM
quickSort(data,0,data.length-1); 4fu'QZ(}
} 5Waw?1GL
private void quickSort(int[] data,int i,int j){ z[WC7hvU
int pivotIndex=(i+j)/2; fm3(70F\
file://swap oHxGbvQc
SortUtil.swap(data,pivotIndex,j); E"Zb};}
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int k=partition(data,i-1,j,data[j]); ^{),+S
SortUtil.swap(data,k,j); [yO=S0 e
if((k-i)>1) quickSort(data,i,k-1); uQeqnGp
if((j-k)>1) quickSort(data,k+1,j); m,\i
x^zdTMNhw
} I)[`ZVAXR
/** IO}+[%ptc*
* @param data ;l$9gD>R
* @param i n"(7dl?
* @param j BmJkt3j."
* @return ZrFr`L5F;
*/ Bx+d3
private int partition(int[] data, int l, int r,int pivot) { *y)4D[
z-
do{ #0}Ok98P
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); #.~ga7Q
SortUtil.swap(data,l,r); lo"j )Zt
} +c-6#7hh
while(l SortUtil.swap(data,l,r); uZ@-e|qto
return l; ksTzXG8
} .6\T`6H=a
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} LEWa6'0rq
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改进后的快速排序: nHrP>zN
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package org.rut.util.algorithm.support; KA`0g=
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import org.rut.util.algorithm.SortUtil; 9X!ET!
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/** [.{^" <Z<
* @author treeroot a@Mq J=<L
* @since 2006-2-2 B,4q>KQA
* @version 1.0 b2G2 cL-(
*/ g4Y) Bz
public class ImprovedQuickSort implements SortUtil.Sort { #>BX/O*D
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private static int MAX_STACK_SIZE=4096; *U
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private static int THRESHOLD=10; >H$;Z$o*(
/* (non-Javadoc) o1e4.-xI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FX7M4t#<
*/ >J.Qm0TY(
public void sort(int[] data) { <F ew<r2
int[] stack=new int[MAX_STACK_SIZE]; -<|Y 1PQ
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int top=-1; oBb?"2 ~9
int pivot; 4 ^4d9?c
int pivotIndex,l,r; ]Qd{ '}+
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stack[++top]=0; UIQQ\,3
stack[++top]=data.length-1; ~
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while(top>0){ `Uv)Sf{
int j=stack[top--]; tzPC/?
int i=stack[top--]; )Ea8{m!
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pivotIndex=(i+j)/2; J6DnPaw-G
pivot=data[pivotIndex]; +)zDA:2Wa"
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SortUtil.swap(data,pivotIndex,j); Np$z%ewK.
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file://partition #^Ys{
l=i-1; ^/k,
r=j; z9 O~W5-U
do{
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while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); }~rcrm.
SortUtil.swap(data,l,r); /oFc03d
} vmvFBzLR
while(l SortUtil.swap(data,l,r); ZBF1rx?
SortUtil.swap(data,l,j); \<X2ns@Tf
ln fm0
if((l-i)>THRESHOLD){ #XcU{5Qm5
stack[++top]=i; -/zp&*0gcx
stack[++top]=l-1; <>]1Y$^Y
} pL! a
if((j-l)>THRESHOLD){ IJ0#iA. T
stack[++top]=l+1; C w%BZ
stack[++top]=j; 0potz]}
} 6ga5^6W
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} Vg{Zv4+t
file://new InsertSort().sort(data); *!Y-!
insertSort(data); n08;
<
} #Mg lHQO+
/** #sZIDn J#
* @param data Z^*NnL.'
*/ q4k.f_{
private void insertSort(int[] data) { p0Gk j-
int temp; 9#Bx]wy
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); PyFj@n
} 'PpZ/ry$
} L%XXf3;c
} ` 5#hjLe
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} mB`D}g$
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归并排序: L<=) @7
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package org.rut.util.algorithm.support; 'B`#:tX^N
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import org.rut.util.algorithm.SortUtil; 1%jH^,t/m
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/** {]`p&@
* @author treeroot f?^S bp
* @since 2006-2-2 =m9 i)Q
* @version 1.0 #uKWuGz]
*/ H2U:@.o2&
public class MergeSort implements SortUtil.Sort{ 3$_*N(e
7}%H2$Do
/* (non-Javadoc) HxIoA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bAiJn<
*/ s"coQ!e1.
public void sort(int[] data) { \(fq8AL?
int[] temp=new int[data.length]; Xu#:Fe}:
mergeSort(data,temp,0,data.length-1); Xpl?g=B&u
} Xm|ib%no
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private void mergeSort(int[] data,int[] temp,int l,int r){ 76bc]o#
int mid=(l+r)/2; Y@%`ZPJ
if(l==r) return ; n=o_1M|
mergeSort(data,temp,l,mid); Za%LAyT_s
mergeSort(data,temp,mid+1,r); +/y]h0aa
for(int i=l;i<=r;i++){ W5Zqgsy($F
temp=data; Xa,\EEmQ
} -zKxf@"
int i1=l; Q'K$L9q
int i2=mid+1; Ly>OLI0x_
for(int cur=l;cur<=r;cur++){ j5^-.sEEw
if(i1==mid+1) b#a@rh
data[cur]=temp[i2++]; ,r`UBQ}?
else if(i2>r) X;VQEDMPU
data[cur]=temp[i1++]; OH6n^WKY
else if(temp[i1] data[cur]=temp[i1++]; .6m_>Y6
else f{ ^:3"i
data[cur]=temp[i2++]; [zh"x#AyI
}
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} J +q|$K6
YeyGN
} lhO2'#]i
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改进后的归并排序: ]?&FOzN5$P
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package org.rut.util.algorithm.support; 3sbK7,4
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import org.rut.util.algorithm.SortUtil; h1f8ktF
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/** !d8A
* @author treeroot B+"g2Y
* @since 2006-2-2 9M'DC^x*T
* @version 1.0 cAEok P
*/ )yj:PY]
public class ImprovedMergeSort implements SortUtil.Sort { qyyq&
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private static final int THRESHOLD = 10; g_q<ze
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/* H;S%Y`V
* (non-Javadoc) |=5/Rax^
* 0+ `Pg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) hO( RZ'{
*/ *||d\peQ
public void sort(int[] data) { g_z/{1$
int[] temp=new int[data.length]; t&}6;z 3
mergeSort(data,temp,0,data.length-1); y LM"+.?pL
} rMp9jG@3
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private void mergeSort(int[] data, int[] temp, int l, int r) { _~M^ uW^l
int i, j, k; +S9PML){h
int mid = (l + r) / 2; 8omC%a}9m
if (l == r) A5nO=
return; Qf@iU%G
if ((mid - l) >= THRESHOLD) f$F*3
mergeSort(data, temp, l, mid);
'Cc(3
else op @iGC+
insertSort(data, l, mid - l + 1); &leK}je [
if ((r - mid) > THRESHOLD) ,}J_:\j
mergeSort(data, temp, mid + 1, r); euQ.ArF
else e:-8k_0|
insertSort(data, mid + 1, r - mid); d,9`<1{9
8l>CR#%@C
for (i = l; i <= mid; i++) { '~Q2!F
temp = data; 926Tl
} }V`mp
for (j = 1; j <= r - mid; j++) { lZWX7FO'
temp[r - j + 1] = data[j + mid]; OYmi?y\
} 8)wt$b
int a = temp[l]; Bs!4H2@{(]
int b = temp[r]; FxRXPt
FK
for (i = l, j = r, k = l; k <= r; k++) { r;gP}H ?
if (a < b) { y%cO#P@
data[k] = temp[i++]; -F1-
e+=
a = temp; (OmH~lSO.
} else { #YK5WTn5
data[k] = temp[j--]; b,<9
b = temp[j]; )/|6'L-2
} <Kt3PyF
} >M;u*Go`QO
} g^~Kze
gEJi[E@
/** _[K#O,D,
* @param data z`U Ukl}T
* @param l c`G&KCw)d
* @param i '2nqHX
D
*/ e3m*i}K}
private void insertSort(int[] data, int start, int len) { A3{0q>CC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ziEz.Wn"
} kXc25y'blP
} Q0cRH"!:
} lE5v-z? &|
} ycr"Y|
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堆排序: Q-eCHr)
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package org.rut.util.algorithm.support; cAuY4RV
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import org.rut.util.algorithm.SortUtil; HY}j!X
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/** MI#mAg<
* @author treeroot Lm%GR[tyQ
* @since 2006-2-2 w4:\N U
* @version 1.0 =f 7r69I"
*/ {nMAm/kyj
public class HeapSort implements SortUtil.Sort{ Es'Um,ku
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/* (non-Javadoc) =A!S/;z>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [L~@uAMw:
*/ K%j&/T j1
public void sort(int[] data) { vO@s$qi
MaxHeap h=new MaxHeap(); -kj< 1~YW
h.init(data); b~0N^p[&%
for(int i=0;i h.remove(); d- E4~)Qy
System.arraycopy(h.queue,1,data,0,data.length); 9NpD!A&64<
} F%/h*
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private static class MaxHeap{ }5 9U}@xC
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void init(int[] data){ ktH8as^54!
this.queue=new int[data.length+1]; g:#dl\k
for(int i=0;i queue[++size]=data; !<\Br
fixUp(size); v"Jgw;3
} 5OP`c<
} Mi7y&~,
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private int size=0; #-#NqX:
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private int[] queue; !|G(Yg7C
(lH,JX`$a
public int get() { USPTpjt8R
return queue[1]; ANMg
} ~H /2R
+M\8>/0oA
public void remove() { k9si|'
SortUtil.swap(queue,1,size--); e [0w5)X
fixDown(1); Ff4*IOZ}(
} j
tA*pL'/V
file://fixdown
>'=MH2;
private void fixDown(int k) { %{5n1w
int j; HgRwiIt
while ((j = k << 1) <= size) { gn1(4
o
if (j < size %26amp;%26amp; queue[j] j++; NCS!:d:Ry
if (queue[k]>queue[j]) file://不用交换 GA3sRFZdQ
break; 'cd N3i(
SortUtil.swap(queue,j,k); oQ2KW..q
k = j; T1Ta?b
} yJ2B3i@T4
} j|(Z#3J
private void fixUp(int k) { 8Jr?ZDf`
while (k > 1) { d^Di*&X
int j = k >> 1; LXfCmc9|Z
if (queue[j]>queue[k]) pa]" iZz
break; 5z/Er".P
SortUtil.swap(queue,j,k); oduDA:
k = j; e$/B_o7(
} lhLGG
} 2%UBwSiqR
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} fP-|+TyO
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} %@J1]E;
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SortUtil: LLAa1Wq
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package org.rut.util.algorithm; pK&I^r
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import org.rut.util.algorithm.support.BubbleSort; o4^Fo p
import org.rut.util.algorithm.support.HeapSort; @e2}BhB2
import org.rut.util.algorithm.support.ImprovedMergeSort; x^= M6;:
import org.rut.util.algorithm.support.ImprovedQuickSort; &<x@1,
import org.rut.util.algorithm.support.InsertSort; O}ejWP8>
import org.rut.util.algorithm.support.MergeSort; )M<vAUF
import org.rut.util.algorithm.support.QuickSort; 'ktHPn
,K
import org.rut.util.algorithm.support.SelectionSort; C;B}3g&
import org.rut.util.algorithm.support.ShellSort; ?w&SW{ I
/X8<C=}
/** 7,$z;Lr0S
* @author treeroot 2&(sa0*y
* @since 2006-2-2 ' P"g\;Ij
* @version 1.0 [IBQvL
*/ yubSj*
public class SortUtil { %:C ]7gQ
public final static int INSERT = 1; r64u31.)
public final static int BUBBLE = 2; !
T9]/H?
public final static int SELECTION = 3; E@)\Lc~
public final static int SHELL = 4; C*70;:b
public final static int QUICK = 5; dKhA$f~
public final static int IMPROVED_QUICK = 6; C*6S@4k
public final static int MERGE = 7; 5_o$<\I\
public final static int IMPROVED_MERGE = 8; ./-JbW
public final static int HEAP = 9; .V'V:;BE%
?(zoTxD
public static void sort(int[] data) { Vy)hDa[&
sort(data, IMPROVED_QUICK); Wa"(m*hW
} ZXb0Y2AVx
private static String[] name={ r4 dOK] 0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %'Xk)-+y
}; &~DTZgY
Z'v-F^
private static Sort[] impl=new Sort[]{ T6#"8qz<
new InsertSort(), 'W. Vr4
new BubbleSort(), Z0,~V
new SelectionSort(), d.<~&.-$
new ShellSort(), k)(Biz398E
new QuickSort(), Y;J *4k]
new ImprovedQuickSort(), ?:rx1}:F
new MergeSort(), h rN%
new ImprovedMergeSort(), o@E/r.uK
new HeapSort() -7-['fX
}; )|#%Czd4
p#d+>7
public static String toString(int algorithm){ xBnbF[
return name[algorithm-1]; Zf*r2t1&P
} ,2[ra9n
y>VcgLIB
public static void sort(int[] data, int algorithm) { ekSY~z=/u
impl[algorithm-1].sort(data); d4^`}6@
} !E\[SjY@J
}qPhx6nP
public static interface Sort { 'md0] R|
public void sort(int[] data); 1qdZc_x
} g<*jlM1r
6iezLG5
public static void swap(int[] data, int i, int j) { PFSLyV*
int temp = data; @)YY\l#
data = data[j]; &R-H"kK?
data[j] = temp; h\[\\m
O
} AD5)
.}[F
} WPuz]Ty