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。
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插入排序: su\`E&0V+
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package org.rut.util.algorithm.support; YHxQb$v)
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import org.rut.util.algorithm.SortUtil; Zb'a+8[
/** abS3hf
* @author treeroot 0w vAtK|Q
* @since 2006-2-2 <Ynrw4[)t
* @version 1.0 $Yw~v36`t/
*/ 0;]VTz?P
public class InsertSort implements SortUtil.Sort{ ?D(aky#cyc
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/* (non-Javadoc) j9-.bGtm?.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]3Jb$Q@
*/ Tr;&bX5]H
public void sort(int[] data) { kUr/*an
int temp; kxmsrQ>av
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); 8Au W>7_
} h${=gSJc
} `(6cRT`Wp
} j+>N&.zs
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} lsgZ
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冒泡排序: j(M.7Z7^
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package org.rut.util.algorithm.support; H;[?8h(
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import org.rut.util.algorithm.SortUtil; 9! yDZ<s
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/** k ,ezB+
* @author treeroot ~NO7@muw
* @since 2006-2-2 ME.!l6lm\
* @version 1.0 g!z &lQnZ
*/ +WguWLO"
public class BubbleSort implements SortUtil.Sort{ phwBil-vUU
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/* (non-Javadoc) }C$D-fH8sW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N Ff`V
*/ omT^jh
public void sort(int[] data) { &z>iqm"Ww
int temp; zhY]!
for(int i=0;i for(int j=data.length-1;j>i;j--){ 7&(h_}Z
if(data[j] SortUtil.swap(data,j,j-1); \{qtdTd
} :W+%jn
} i8#:y`ai
} =<AG}by![
} } V"A;5j`
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} cqcH1aSv
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选择排序: 4.>y[_vu
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package org.rut.util.algorithm.support; /XdLdA!v
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import org.rut.util.algorithm.SortUtil; y!|4]/G]?t
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/** n;>r
* @author treeroot )r(e\_n
* @since 2006-2-2 cs4IO
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* @version 1.0 ziv+*Qn_b4
*/ Dw,LB>Eq,
public class SelectionSort implements SortUtil.Sort { '}q/;}ih
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/* 'vKae
* (non-Javadoc) t&IWKu#
* OUN"'p%%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Dj3,SJ*x
*/ T^ #1T$
public void sort(int[] data) { K1o&(;l8G
int temp; :j`XU
for (int i = 0; i < data.length; i++) { M"$g*j
int lowIndex = i; tv;?W=&P
for (int j = data.length - 1; j > i; j--) { H)rJ>L
if (data[j] < data[lowIndex]) { Yfy";C7X
lowIndex = j; ~h%H;wC&
} 0QEcJ]Qb8
} !|cM<}TF,
SortUtil.swap(data,i,lowIndex); ciW;sK8
} V3/OKI\o
} 7(H?3)%0
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} @}'?o_/C
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Shell排序: upq3)t_
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package org.rut.util.algorithm.support; <irr.O
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import org.rut.util.algorithm.SortUtil; T
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/** dd4^4X`j
* @author treeroot -@~4: o
* @since 2006-2-2 'a~F'FN$
* @version 1.0 \8k4v#wH
*/ VI.Cmw~S
public class ShellSort implements SortUtil.Sort{ .{(gku>g(
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/* (non-Javadoc) Ze?H
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _OK!/T*FBt
*/ i{r[zA]$
public void sort(int[] data) { 1TgD;qX
for(int i=data.length/2;i>2;i/=2){ |WgFLF~k
for(int j=0;j insertSort(data,j,i); \3x+Z!
} v}@Uc-(
} BNixp[Hc
insertSort(data,0,1); k~JTQh*,w
} /8/N
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/** ]v_u2f'
* @param data fyq%-Tj
* @param j }RQHsS
* @param i <JW%h :\t
*/ 9zpOp-K6
private void insertSort(int[] data, int start, int inc) { m;vm7]5
int temp; )
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for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); ];QX&";Z
} ;20sh^~
} Uu|R]azbO
} rt\.|Hr4s
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} e )]
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快速排序: C0&ZQvvy1:
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package org.rut.util.algorithm.support; _ujhD
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import org.rut.util.algorithm.SortUtil; 'Ojxzz*tT
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/** fD2 N}
* @author treeroot > v4+@o[~
* @since 2006-2-2 2Xv$
* @version 1.0 X6r3$2!
*/ 9]g`VD6<v
public class QuickSort implements SortUtil.Sort{ S]gV! Q4%
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/* (non-Javadoc) 5W09>C>OC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N \woFrG
*/ 4@Bl 1b[<
public void sort(int[] data) { W O'nW
quickSort(data,0,data.length-1); 0
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} z :A_
private void quickSort(int[] data,int i,int j){ <#)Q.P
int pivotIndex=(i+j)/2; 3O|2Z~>3
file://swap b\UE+\a&
SortUtil.swap(data,pivotIndex,j); PD-*rG `
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int k=partition(data,i-1,j,data[j]); t* =i8`8
SortUtil.swap(data,k,j); u/J1Z>0
if((k-i)>1) quickSort(data,i,k-1); "XU)(<p
if((j-k)>1) quickSort(data,k+1,j); r(g#3i4Q
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} Am >b 7Z!
/** =TA8]7S~U
* @param data 2F/oWt|w?
* @param i &_'3(xIO
* @param j sl)]yCD|5
* @return ?BU?c:"f
*/ qCm8R@
private int partition(int[] data, int l, int r,int pivot) { cEK#5
do{ FaKZ|~Y
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while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
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SortUtil.swap(data,l,r); Q5*"t*L!N
} HE+D]7^
while(l SortUtil.swap(data,l,r); *56q4\1
return l; M`?ATmYy
} }&^1")2t
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} 1+xi1w}3a
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改进后的快速排序: it->)?"(6
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package org.rut.util.algorithm.support; !4$-.L)#
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import org.rut.util.algorithm.SortUtil; C-/+n5J
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/** jOL=vG
* @author treeroot b[MKo7
* @since 2006-2-2 =P,pW
* @version 1.0 (Vt5@25JW
*/ }*7Gq
public class ImprovedQuickSort implements SortUtil.Sort { e/$M6l$Q*4
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private static int MAX_STACK_SIZE=4096; 0<nW
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private static int THRESHOLD=10; '~xiD?:
/* (non-Javadoc) jgBJs^JgYG
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '
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*/ G'Uq595'-
public void sort(int[] data) { e<"sZK
int[] stack=new int[MAX_STACK_SIZE]; 5Trc#i<\
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int top=-1; 5?TX.h9B4
int pivot; 2]H?q!l!O
int pivotIndex,l,r; Rd|^C$6
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stack[++top]=0; O)`ye5>v
stack[++top]=data.length-1; I<S*"[nV
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while(top>0){ @`HW0Y_:
int j=stack[top--]; TIn o"tc3
int i=stack[top--]; 3H%bbFy
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pivotIndex=(i+j)/2; MgHO WoF
pivot=data[pivotIndex]; LqS_%6^
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SortUtil.swap(data,pivotIndex,j); `(~oZbErM
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file://partition {-yw@Kq
l=i-1; Nk?/vMaw
r=j; !)FKF7'
do{ ![m6$G{y
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); A9LVS&52
SortUtil.swap(data,l,r); zn5|ewl@"
} 5B;;{GR
while(l SortUtil.swap(data,l,r); H2CpZK'
SortUtil.swap(data,l,j); l)Mi?B~N
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if((l-i)>THRESHOLD){ %5j*e
stack[++top]=i; Pe`jNiI
stack[++top]=l-1; Xkf|^-n
} @[]#[7
if((j-l)>THRESHOLD){ n{"a0O
stack[++top]=l+1; 2W;2._
stack[++top]=j; Uq.hCb`:
} I~,b ZA
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} ^_uCSA'X
file://new InsertSort().sort(data); )-\qo#0l
insertSort(data); /$|-!e<5b\
} Sea6xGdq
/** k!d<2Qp W
* @param data mnU8i=v0A
*/ dHtEyF
private void insertSort(int[] data) { Tj!rAMQk
int temp; C9eisUM
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); Kr+#)S
} 2g;Id.i>
} S(_DR8
} -f"{%<Q
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} c9+yU~(
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归并排序: Fm+V_.H/;
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package org.rut.util.algorithm.support; f0*_& rP
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import org.rut.util.algorithm.SortUtil; Nr`v|_U
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/** @QF;m
* @author treeroot ul!q)cPb{
* @since 2006-2-2 |Gr@Mi5
* @version 1.0 xp *d:
*/ C#L|7M??;
public class MergeSort implements SortUtil.Sort{ 6Ia[`xuL
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/* (non-Javadoc) SZvC4lOn#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *T:jR
*/ 4|DN^F~iut
public void sort(int[] data) { bl\;*.s'
int[] temp=new int[data.length]; ;Pvnhy
mergeSort(data,temp,0,data.length-1); 6rlvSdB
} yGH')TsjD
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private void mergeSort(int[] data,int[] temp,int l,int r){ =`l><
int mid=(l+r)/2; Bf" ZmG9
if(l==r) return ; ,Bj]j -\Y
mergeSort(data,temp,l,mid); 97pnq1b
mergeSort(data,temp,mid+1,r); Uh'W d_?
for(int i=l;i<=r;i++){ \\35}
9
temp=data; ^MVOaV65
} 7mL1$i6=
int i1=l; u\km_e
int i2=mid+1; EF;B)y=
for(int cur=l;cur<=r;cur++){ _S CY e
if(i1==mid+1) IEWl
I
data[cur]=temp[i2++]; BL%3[JQ
else if(i2>r) "@rHGxK
data[cur]=temp[i1++]; 1+Vei<H$
else if(temp[i1] data[cur]=temp[i1++]; }xY|z"&
else 7<k@{xI/
data[cur]=temp[i2++]; MI~QXy,
} `0-i>>
} 'lmjZ{k
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} #q8/=,3EG
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改进后的归并排序: 5xa!L@)`wF
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package org.rut.util.algorithm.support; @==
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import org.rut.util.algorithm.SortUtil; ~xc0Ky?8
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/** Ah
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* @author treeroot 7*4i0{]
* @since 2006-2-2 ][~rk?YY
* @version 1.0 x_= 3!)
*/ )7Oj
public class ImprovedMergeSort implements SortUtil.Sort { M*dou_Q
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private static final int THRESHOLD = 10; d%oHcn
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/* sO)!}#,
* (non-Javadoc) ca%XA|_J
* p&HkR^.S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) }m S+%w"j
*/ fg
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public void sort(int[] data) { v=D4O .
int[] temp=new int[data.length]; r1sA^2g.
mergeSort(data,temp,0,data.length-1); pzU:AUW
} \G6V -W
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private void mergeSort(int[] data, int[] temp, int l, int r) { 5=;'LWXCJ
int i, j, k; GGFrV8
int mid = (l + r) / 2; x^
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if (l == r) dz?Ey~;M
return; Rz33_ qA
if ((mid - l) >= THRESHOLD) &9xcP.3
mergeSort(data, temp, l, mid); 'he&h4fm
else 5~"m$/yE
insertSort(data, l, mid - l + 1); ;5}"2hU>
if ((r - mid) > THRESHOLD) ;AT~?o`n
mergeSort(data, temp, mid + 1, r); mMad1qCi7
else S?Uvt?
insertSort(data, mid + 1, r - mid); )lVplAhZD
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for (i = l; i <= mid; i++) { KPa&P:R3
temp = data; SuA`F|7?P
} -yY]0
for (j = 1; j <= r - mid; j++) { \ X;)Kt"
temp[r - j + 1] = data[j + mid]; $PTl{
} ~93+Oxg
int a = temp[l]; _\AT_Zmy
int b = temp[r]; HE3x0H}o>
for (i = l, j = r, k = l; k <= r; k++) { Y^,G}
&p
if (a < b) { {^Q1b.=
data[k] = temp[i++]; &P>a
a = temp; /^Zgv-n
} else { '>UQsAvm
data[k] = temp[j--]; s=)1:jYk
b = temp[j]; d~O)mJ
J
} g=kuM
} 5~xv"S(E}
} t8S,C4
WSV% Oy3V
/** q]z%<`.9*
* @param data !*=+E%7
* @param l (k>I!Z/&2
* @param i P!lTK
*/ YDiru
private void insertSort(int[] data, int start, int len) { = k>ygD_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); c`!8!R
} wfBf&Z0{
} > 0NDlS%Q:
} X:gE
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} 2]-xmS>|b
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堆排序: -'::$
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package org.rut.util.algorithm.support; T~-PT39E
C-L[" O0[
import org.rut.util.algorithm.SortUtil; jxA*Gg3cT5
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/** EyPF'|Qtn
* @author treeroot Mj- B;r
* @since 2006-2-2 aG/L'weR
* @version 1.0 -S*MQA4
*/ zrCQEQq
public class HeapSort implements SortUtil.Sort{ 99..]
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/* (non-Javadoc) Zk75GC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pbb6?R,
*/ Xu#K<#V
public void sort(int[] data) { 00(#_($
MaxHeap h=new MaxHeap(); <MoKTP-<
h.init(data); z9[BQ(9t
for(int i=0;i h.remove(); \Dn
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System.arraycopy(h.queue,1,data,0,data.length); %.;`0}b
} 5Rec~&v
c<j+"
private static class MaxHeap{ .f]2%utHB
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void init(int[] data){ "<I*ViZ
this.queue=new int[data.length+1]; ia}V8i
for(int i=0;i queue[++size]=data; EkE U}2
fixUp(size); _f5n
t:-
} J`4{O:{4
} X:Z*7P/
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private int size=0; 2
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#GT4/Ej}W
private int[] queue; &DgJu.
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public int get() { B'"RKs]
return queue[1]; JHZ`LWq
} z4yV1
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public void remove() { YjM_8@<
SortUtil.swap(queue,1,size--); IrZ!.5%tV
fixDown(1); nd/.]"
} RY]Vo8
file://fixdown ^sA"&Vdr^
private void fixDown(int k) { }yW*vy6`
int j; 4]$$ar)
while ((j = k << 1) <= size) { /Sag_[i
if (j < size %26amp;%26amp; queue[j] j++; )+S^{tt
if (queue[k]>queue[j]) file://不用交换
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break; :>'4@{'
SortUtil.swap(queue,j,k); XV>
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k = j; `K^j:fE7n
} ] oh.w
} ?g21U97Q
private void fixUp(int k) { uNn]hl|x
while (k > 1) { sjISVJ?
int j = k >> 1; M)1?$'Aq
if (queue[j]>queue[k]) _(Qec?[^Ps
break; c<gvUVHIxR
SortUtil.swap(queue,j,k); ;^K4kK&f
k = j; *j0kb"#
} 17nONhh
} .;&1"b8G
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} k5%:L2FO
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} >pV|c\
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SortUtil: k}yUD 0Y
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package org.rut.util.algorithm; 9Xv>FVG!
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import org.rut.util.algorithm.support.BubbleSort; [aK7v{Wu
import org.rut.util.algorithm.support.HeapSort; UF)4K3X
import org.rut.util.algorithm.support.ImprovedMergeSort; ^Cs5A0xo#s
import org.rut.util.algorithm.support.ImprovedQuickSort; I C6}s
import org.rut.util.algorithm.support.InsertSort; w/`I2uYu
import org.rut.util.algorithm.support.MergeSort; 9ntXLWK7e
import org.rut.util.algorithm.support.QuickSort; Yb<t~jm
import org.rut.util.algorithm.support.SelectionSort; 3O:gZRxK
import org.rut.util.algorithm.support.ShellSort; )aOPR|+
7;UUS1
/** }BpCa6SAs
* @author treeroot ) DzbJ}
* @since 2006-2-2 )9L:^i6
* @version 1.0 V_&>0P{q
*/ k8}*b&+{vz
public class SortUtil { ZPT6
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public final static int INSERT = 1; U2DE"
public final static int BUBBLE = 2; pL{h1^O}
public final static int SELECTION = 3; ib4 shaN`
public final static int SHELL = 4; [_&\wHX
public final static int QUICK = 5;
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public final static int IMPROVED_QUICK = 6; 26c,hPIeXY
public final static int MERGE = 7; D=w5Lks
public final static int IMPROVED_MERGE = 8; a|*{BlY
public final static int HEAP = 9; q&h&GZ
a]<y*N?qu
public static void sort(int[] data) { F9sVMV
sort(data, IMPROVED_QUICK); [f'V pId8
} c&1:H1#
private static String[] name={ <_S>- ;by
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H0zKL]D'>
}; ltKUpRE\?
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private static Sort[] impl=new Sort[]{ rpk
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new InsertSort(), H5f>Q0jq
new BubbleSort(), K[%)_KW
new SelectionSort(), IpX>G]"-C
new ShellSort(), jpl"KN?X
new QuickSort(), $YM>HZe-
new ImprovedQuickSort(), }{J5)\s9
new MergeSort(), U2=PmS P
new ImprovedMergeSort(), (p2jigP7a[
new HeapSort() 2qY`*Y.2
}; "T`Q,
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public static String toString(int algorithm){ ; ]*
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return name[algorithm-1]; c~B[<.Qj
} 5",@!1ju
qSRE)C=)
public static void sort(int[] data, int algorithm) { 9sQ4
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impl[algorithm-1].sort(data); 2|xNT9RW
} >tf y\P Y:
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public static interface Sort { vJ__jO"Sq
public void sort(int[] data); ?U~9d"2=
} K&zp2V
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public static void swap(int[] data, int i, int j) { O7p>"Bh
int temp = data; )z'LXy8
data = data[j]; H pHXt78
data[j] = temp; H"_ZqEg
} _ lrCf
} n\f8%z