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。 O
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插入排序: +[7 DRT:
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package org.rut.util.algorithm.support; +Uxtxl'
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import org.rut.util.algorithm.SortUtil; BHpj_LB-P
/** >6gduD!6I
* @author treeroot lyw)4;wt\
* @since 2006-2-2 ;^ff35EE8
* @version 1.0 s&M#]8x;x
*/ r#(*x 2~,
public class InsertSort implements SortUtil.Sort{ i QvqifDmh
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/* (non-Javadoc) ,U.|+i{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0}9
*/ #Yx
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public void sort(int[] data) { c/}-pZn<
int temp; nU/x,W[}
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); |?\2F
} H8h,JBg5<F
} grE'ySX0
} LfMN 'Cb
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} { {+:Vy
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冒泡排序: ql7N\COoq
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package org.rut.util.algorithm.support; 3bagL)'iz
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import org.rut.util.algorithm.SortUtil; $fwj8S7$
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/** ggUw4w/e
* @author treeroot :.crES7<[X
* @since 2006-2-2 dG)}H_
* @version 1.0 H,;9' *84
*/ b
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public class BubbleSort implements SortUtil.Sort{ ,"Nb;Yhg
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/* (non-Javadoc)
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* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0}-MWbG
*/ RY]jY | E
public void sort(int[] data) { LRPdA "Z
int temp; B6U4>ZN
for(int i=0;i for(int j=data.length-1;j>i;j--){ Q#pgl
if(data[j] SortUtil.swap(data,j,j-1); J :l%
} IYe ,VL
} K<p)-q
} 9^@#Ua
} 8xx2+
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} ; g\rY
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选择排序: ~Hvf"bvK|
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package org.rut.util.algorithm.support; */j[n$K>~`
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import org.rut.util.algorithm.SortUtil; gFnJDR
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/** ,yTT,)@<
* @author treeroot v(l:N@L
* @since 2006-2-2 j9|1G-CM
* @version 1.0 J )UCy;Y
*/ Bs\&'=l
public class SelectionSort implements SortUtil.Sort { vY]7oX+
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/* !wIrI/P7#
* (non-Javadoc) C,,S<=L:
* B1va]=([)W
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7*@BCu6
*/ i .''\
public void sort(int[] data) { Mc6v
int temp; h!
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for (int i = 0; i < data.length; i++) { `Gh#2U
int lowIndex = i; ,p6o "-
for (int j = data.length - 1; j > i; j--) { ^`f qK4<
if (data[j] < data[lowIndex]) { ~\u?Nf~L
lowIndex = j; CUx[LZR7m
} Ex5LhRe>=
} CzI/Z+\
SortUtil.swap(data,i,lowIndex); 1(qL),F;
} ap[Q'=A`
} <h*$bx]9 +
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Shell排序: gCaxZ~o
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package org.rut.util.algorithm.support; gqDSHFm:
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import org.rut.util.algorithm.SortUtil; S{UEV7d:n0
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/** gNSsT])
* @author treeroot R
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* @since 2006-2-2 h-5] nL3
* @version 1.0 `A$zLqz)Vm
*/ v8\pOI}c
public class ShellSort implements SortUtil.Sort{ uOb}R
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/* (non-Javadoc) =/bC0bb{i
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) $;j{?dvm.
*/ TTo5"r9I8
public void sort(int[] data) { [ip}f4K
for(int i=data.length/2;i>2;i/=2){ TchByN6oN<
for(int j=0;j insertSort(data,j,i); |qtZb}"|
} J+YoAf`hi
} D3x
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insertSort(data,0,1); rXVRX#Lh
} 2 5Ia
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/** %[fZ@!B
* @param data ?A~a}bFZ
* @param j v+
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* @param i +uMK_ds~
*/ Q`BB@E
private void insertSort(int[] data, int start, int inc) { >C -N0H
int temp; R?}<CjI
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); S{zl<>+
} xDIl
} L4{+@T1A[
} F*=}}H/
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}
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快速排序: @WP%kX.?
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package org.rut.util.algorithm.support; v.Xmrry
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import org.rut.util.algorithm.SortUtil; B2,JfKk/
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/** /y-8dgv0a
* @author treeroot / a$B8,
* @since 2006-2-2 qoOq47F
* @version 1.0 $rH}2
*/ lfte
public class QuickSort implements SortUtil.Sort{ _tfi6UQ&lY
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/* (non-Javadoc) !6eF8T
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) KHoDD=O
*/ Sxcp
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public void sort(int[] data) { pGsu#`t
quickSort(data,0,data.length-1); y-o54e$4Cq
} k
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private void quickSort(int[] data,int i,int j){ 9~}.f1z
int pivotIndex=(i+j)/2; 6<9gVh<=w
file://swap yGlOs]>n
SortUtil.swap(data,pivotIndex,j); n hGh5,
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int k=partition(data,i-1,j,data[j]); z_ L><}H
SortUtil.swap(data,k,j); B{ cb'\C
if((k-i)>1) quickSort(data,i,k-1); cB}6{c$_sW
if((j-k)>1) quickSort(data,k+1,j); H`NT`BE
6='x}Qb \H
} #)( D_*
/** \(ju0qFqH
* @param data 9^^:Y3j
* @param i Il$Jj-)
* @param j 8Oo16LPD
* @return nH|7XY9"
*/ %Q|Hvjk=E
private int partition(int[] data, int l, int r,int pivot) { lM[FT=M
do{ 1^ y^b{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ^4{"h
SortUtil.swap(data,l,r); myDcr|j-a
} <@+{EK'`q
while(l SortUtil.swap(data,l,r);
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return l; w~WW2w
} (r"2XXR
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} fk(h*L|sI
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改进后的快速排序: w7yz4_:x^
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package org.rut.util.algorithm.support;
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import org.rut.util.algorithm.SortUtil; a f UOIM
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/** l6< bV#_qe
* @author treeroot h|[oQ8)
* @since 2006-2-2 `r*bG=
* @version 1.0 ] F2{:RW
*/ <CGJ:% AY
public class ImprovedQuickSort implements SortUtil.Sort { N3?hu}
#~6au6LMC
private static int MAX_STACK_SIZE=4096; 7oZtbBs]M
private static int THRESHOLD=10; p/'09FY+ U
/* (non-Javadoc) Ll0"<G2t
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) YF<U'EVU-
*/ 9NausE40
public void sort(int[] data) { =J^FV_1rJ
int[] stack=new int[MAX_STACK_SIZE]; z#\YA]1
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int top=-1; GaLQ/V2R
int pivot; 0 LIRi%N5*
int pivotIndex,l,r; S/x CX!
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stack[++top]=0; lAo S 9w
stack[++top]=data.length-1; )H-y
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while(top>0){ 8U7X/L
int j=stack[top--]; qBqh>Wo
int i=stack[top--]; @Jr@
fF}
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pivotIndex=(i+j)/2; #]lK! :
pivot=data[pivotIndex]; z-?WU
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SortUtil.swap(data,pivotIndex,j); ljJR7<
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file://partition UGK,+FN
l=i-1; '+E\-X
r=j; 4'`y5E
do{ [K"&1h<>
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); .?*TU~S
SortUtil.swap(data,l,r);
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} Z,5B(X j
while(l SortUtil.swap(data,l,r); ,nz3S5~
SortUtil.swap(data,l,j); L<_zQ
U$ 22 r b
if((l-i)>THRESHOLD){ tqicyNL
stack[++top]=i; 7q'T,'[
stack[++top]=l-1; _4~q&?}V
} C
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if((j-l)>THRESHOLD){ 0p1~!X=I
stack[++top]=l+1; D4\
*
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stack[++top]=j; Q(h/C!rKe
} M 3c
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} p+; La
file://new InsertSort().sort(data); QW_W5|_
insertSort(data); #wfb-`,5&9
} {=<m^
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/** 9O\N
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* @param data )9z3T>QW
*/ .|<+-Rsj
private void insertSort(int[] data) { =JfSg'7
int temp; Vl%jpjqP
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); (v1~p3H
} o1)8?h
} (bON[6OGm
} DI7g-h8`
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} RzN9pAe
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归并排序: f/{*v4!
A,]%*kg2
package org.rut.util.algorithm.support; 6tv-PgZ
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import org.rut.util.algorithm.SortUtil; W;!)Sj4<T!
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/** <K
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* @author treeroot d{:0R9
* @since 2006-2-2 9y( 491"o
* @version 1.0 7V-'><)gI
*/ c`xgz#]v
public class MergeSort implements SortUtil.Sort{ R/?ZbMn]!
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/* (non-Javadoc) 22r$Ri_>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) J~k'b2(p3
*/ Or,W2
public void sort(int[] data) { >j_N6B!
int[] temp=new int[data.length]; Tb<}GcwJ
mergeSort(data,temp,0,data.length-1); w ^8i!jCy
} fe!{vrS
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private void mergeSort(int[] data,int[] temp,int l,int r){ c@/K}
int mid=(l+r)/2; g<PglRr"
if(l==r) return ; 3jDAj!_ea
mergeSort(data,temp,l,mid); y]b&3&
mergeSort(data,temp,mid+1,r); !nt[J$.z^
for(int i=l;i<=r;i++){ 40Hm+Ge
temp=data; v 5dLjy5
} V3q[ #.o
int i1=l; >
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int i2=mid+1; ^~K[ bFbW
for(int cur=l;cur<=r;cur++){ j-9Zzgr
if(i1==mid+1) sG8G}f
data[cur]=temp[i2++]; pT'jX^BU
else if(i2>r) OO*2>Qy~z
data[cur]=temp[i1++]; $#/f+kble
else if(temp[i1] data[cur]=temp[i1++]; ^s_7-p])(
else T1W H
data[cur]=temp[i2++]; %2^wyVkq:
} ?OF9{$m3?
} =U,mzY(
yrQfPR
} s0*@zn>h
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改进后的归并排序: #9CLIYJAd
NNw0
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package org.rut.util.algorithm.support; h@%a+ 6b?
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import org.rut.util.algorithm.SortUtil; @~8*
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/** = ow=3Ku
* @author treeroot vXT>Dc2\!
* @since 2006-2-2 3V%ts7: a
* @version 1.0 |VQmB/a
*/ SkyX\&
public class ImprovedMergeSort implements SortUtil.Sort { hD9b2KZv
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private static final int THRESHOLD = 10; "r[Ob]/
,v_NrX=f?
/* )>I-j$%=2
* (non-Javadoc) W.Z`kH *B
* U6F1QLSLz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cxra(!&
*/ "? ON0u9
public void sort(int[] data) { 5%RiM|+
int[] temp=new int[data.length]; z4{:X Da
mergeSort(data,temp,0,data.length-1); 5]~451
} oMHTB!A=2
~Aw.=Yi=
private void mergeSort(int[] data, int[] temp, int l, int r) { OZ,Xu&N
int i, j, k; AA<QI' 6
int mid = (l + r) / 2; JasA
w7
if (l == r) .X34[AXd
return; ;"|QW?>$D
if ((mid - l) >= THRESHOLD) -rlCE-S
mergeSort(data, temp, l, mid); C1o^$Q|j
else 9nSfFGu
insertSort(data, l, mid - l + 1); Cf>(,rt};
if ((r - mid) > THRESHOLD) vp(ow]Q
mergeSort(data, temp, mid + 1, r); -{A*`.[v
else _BZ6Ws$C2
insertSort(data, mid + 1, r - mid); b)@rp
q![`3m-d.
for (i = l; i <= mid; i++) { |dhKeg_
temp = data; Ui.S)\B
} uR6 `@F
for (j = 1; j <= r - mid; j++) { bX>R9i$
temp[r - j + 1] = data[j + mid]; Z}S7%m
} w|c200Is}e
int a = temp[l]; G_<4% HM
int b = temp[r]; F}?4h Dt
for (i = l, j = r, k = l; k <= r; k++) { 7=gcdfW,;x
if (a < b) { xJ9aFpTC
data[k] = temp[i++]; t~|J2*9l
a = temp; Raf(m,o(
} else { 3,- [lG@o
data[k] = temp[j--]; u9fJ:a
b = temp[j]; @Gt.J*!s/
} ?AK`M #M
} /xj`'8
} e~7FK_y#0
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/** d,toU I
* @param data o59b#9
* @param l N(V_P[]"*,
* @param i %OOkPda
*/ ERia5HnoD,
private void insertSort(int[] data, int start, int len) { RL3*fRlb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zl(o/n
} 3&mpn,
} <cU%yA710
} hZlHY9[t?
} B<i(Y1n[
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堆排序: ,3N>`]Km'
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package org.rut.util.algorithm.support; L9-Jwy2(>
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import org.rut.util.algorithm.SortUtil; o(4gh1b%
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/** -K3d u&j
* @author treeroot "$pbK:
* @since 2006-2-2 u`D _
* @version 1.0 4}s'xMT!
*/ .+kg1=s
public class HeapSort implements SortUtil.Sort{ S`$%C=a.
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/* (non-Javadoc) t+_\^Oa)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <ZheWl
*/ hz*T"HJ]t
public void sort(int[] data) { lv9Tq5C
MaxHeap h=new MaxHeap(); JOJuGB-d
h.init(data); fp*6Dv_
for(int i=0;i h.remove(); T<"Bb[kH
System.arraycopy(h.queue,1,data,0,data.length); 1\~I "$}
} Va?i#<a
ZZ
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private static class MaxHeap{ +3J<vM}dy
}0tHzw=#%e
void init(int[] data){ 4.^T~n G
this.queue=new int[data.length+1]; #:By/9}-
for(int i=0;i queue[++size]=data; 6VVxpDAi:
fixUp(size); mP Hto-=fB
} Tgax ZW
} .$7RF!p
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private int size=0; ]tf`[bINP
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private int[] queue; x;<0Gg~jB
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public int get() { 3&CV!+z
return queue[1]; :;eQ*{ `\
} WMC\J(@.
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public void remove() { ;i\N!T{>
SortUtil.swap(queue,1,size--); /(*Ucv2i}T
fixDown(1); Wy}^5]R0E
} 3E^qh03(
file://fixdown }79O[&
private void fixDown(int k) { AO>b\,0Me
int j; U[02$gd0l
while ((j = k << 1) <= size) { TA0(U$ 4
if (j < size %26amp;%26amp; queue[j] j++; A]TEs)#*7)
if (queue[k]>queue[j]) file://不用交换 V?1[R
break; =yz"xWH
SortUtil.swap(queue,j,k); #:+F
k = j; df$.gP
} w%s];EE
} :L@n(buRN
private void fixUp(int k) { tcT=a@
while (k > 1) { '(rD8 pc
int j = k >> 1; r{^43g?
if (queue[j]>queue[k]) CgmAxcK
break; a6j& po
SortUtil.swap(queue,j,k); b>VV/j4!/
k = j; ]J'TebP=L5
} =Y81h-
} *asv^aFpS
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} ?&;_>0P
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} C\;l)h_{
qFwt^w
SortUtil: icIn>i<m
Zp3-Yo w2
package org.rut.util.algorithm; >h)kbsSU0z
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import org.rut.util.algorithm.support.BubbleSort; f)j*P<V
import org.rut.util.algorithm.support.HeapSort; '/NpmNY:L
import org.rut.util.algorithm.support.ImprovedMergeSort; ~abyjM
import org.rut.util.algorithm.support.ImprovedQuickSort; X=KW
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import org.rut.util.algorithm.support.InsertSort; ^)?Wm,{"w
import org.rut.util.algorithm.support.MergeSort; Te
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import org.rut.util.algorithm.support.QuickSort; 1P(=0\P>&
import org.rut.util.algorithm.support.SelectionSort; @B(oq1i@
import org.rut.util.algorithm.support.ShellSort; 8T9s:/%
Bh'fkW3
/** @,GL&$Y:W
* @author treeroot \Q(a`6U
* @since 2006-2-2 Lv]%P.=[G
* @version 1.0 lYCvYe
*/ 7)V"E-6h
public class SortUtil { 'I&0$<
public final static int INSERT = 1; F5RL+rU(h
public final static int BUBBLE = 2; T>'O[=UWh
public final static int SELECTION = 3; ,wes*
public final static int SHELL = 4; _wK.n.,S~
public final static int QUICK = 5; y;Cs#eo
public final static int IMPROVED_QUICK = 6; F`m}RL]g
public final static int MERGE = 7; babL.Ua8o
public final static int IMPROVED_MERGE = 8; :\P@c(c{^C
public final static int HEAP = 9; 8
E\zjT!#\
PVp>L*|BZ;
public static void sort(int[] data) { CTW\Dt5
sort(data, IMPROVED_QUICK); i7-~"g
} ^J#*sn
private static String[] name={ pT->qQ3;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =~h b&
}; A~PR
TT/H"Ri}Jp
private static Sort[] impl=new Sort[]{ zUL,~u
new InsertSort(), QF/_?Tm4
new BubbleSort(), zP%s] >hH
new SelectionSort(), gAWi&
new ShellSort(), XJ\R'?j
new QuickSort(), 3?a`@C&x
new ImprovedQuickSort(), HTT&T9]
new MergeSort(), dhob]8b
new ImprovedMergeSort(), IZj`*M%3
new HeapSort() olv?$]
}; o& FOp'
rL1yq|]I
public static String toString(int algorithm){ HvG %##
return name[algorithm-1]; u_$4xNmQ
} dEtjcId
2$5">%?
public static void sort(int[] data, int algorithm) { hg" i;I
impl[algorithm-1].sort(data); ]"Uzn
} XLt/$Caf
IS&qFi}W|W
public static interface Sort { 63Zu5b"O/
public void sort(int[] data); @!fUp
b
} &]o-ZZX
XQ}J4J~Vm
public static void swap(int[] data, int i, int j) { rgzra"u)
int temp = data; NplyvjQN;
data = data[j]; ;7z6B|8
data[j] = temp; ?'TK~,dG/
} isL
zgN%
} q7Hf7^a