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。 BKe~y
插入排序: IBr?6_\%"4
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package org.rut.util.algorithm.support; <)+9PV<w
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import org.rut.util.algorithm.SortUtil; AjB-&Z
/** -4{sr|
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* @author treeroot +s.r!?49+
* @since 2006-2-2 WjtmV2b<7
* @version 1.0 8@ck" LUzD
*/ w$4fS
public class InsertSort implements SortUtil.Sort{ }7E2,A9_"
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/* (non-Javadoc) !},_,J~(|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0|n1O)>J
*/ Ds c{- <v
public void sort(int[] data) { sI/Jhw)
int temp; zl\mBSBx"
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); x\!Q[
} b&X- &F
} -kT *gIJ}
} j-@3jFu
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}
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冒泡排序: u{maE ,
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package org.rut.util.algorithm.support; V9qA.NV2
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import org.rut.util.algorithm.SortUtil; [f,; +Ze
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/** 8.bIP
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* @author treeroot W>+\A"
* @since 2006-2-2 E$dPu
* @version 1.0 VeidB!GyP
*/ :hB/|H*=
public class BubbleSort implements SortUtil.Sort{ ~#+ Hhc(
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/* (non-Javadoc) G4][`C]8c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5]DgfwX
*/ -t2bHhG
public void sort(int[] data) { ?]SSmZpk
int temp; HM ;9%rtO
for(int i=0;i for(int j=data.length-1;j>i;j--){ Svj%O(
if(data[j] SortUtil.swap(data,j,j-1); @DG$
} F1%-IBe
} \zCT""'i
} FjD`bhw-
} e>\[OwF-x
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} 0w}OE8uq
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选择排序: %_N-~zZ1E
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package org.rut.util.algorithm.support; o8c4h<,
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import org.rut.util.algorithm.SortUtil; ~YO99PP
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/** ;2-%IA,
* @author treeroot
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* @since 2006-2-2 |%.V{vgP7
* @version 1.0 -E_lwK
*/ `MtI>x
c
public class SelectionSort implements SortUtil.Sort { ;(AVZxCM
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R4!
/* ew8f7S[
* (non-Javadoc) V'y,{YpP
* $6Z@0H@X
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9M{z@H/
*/ nw|ls2
public void sort(int[] data) { [O92JT:li
int temp; G\4h4% a
for (int i = 0; i < data.length; i++) { $/sIdFZi
int lowIndex = i; 6'+;5 M!
for (int j = data.length - 1; j > i; j--) { J+tpBPmb
if (data[j] < data[lowIndex]) { dV(61C0wn
lowIndex = j; Tov !X8p
} S{_i1'
} V4kt&61
SortUtil.swap(data,i,lowIndex); #)hc^gIO&<
} G*.}EoA
} #5*|/LD
@*kQZRGK7
} d2f
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Shell排序: I\eM8`Y$
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package org.rut.util.algorithm.support; Kppi
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import org.rut.util.algorithm.SortUtil; {x$WBy9
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/** 1#BMc%
* @author treeroot ;#a^M*e
* @since 2006-2-2 zyb>PEd.
* @version 1.0 GSck^o2{
*/ v%8.o%G
public class ShellSort implements SortUtil.Sort{ Bg.~#H
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/* (non-Javadoc) Hg<d%7.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (/6~*<ZGT
*/ k$j4~C'$
public void sort(int[] data) { Kxs_R#k
for(int i=data.length/2;i>2;i/=2){ tB-0wD=PR
for(int j=0;j insertSort(data,j,i); JRfG]u6GU
} N,N9K
} BWRM
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insertSort(data,0,1); vhe[:`=a
} R0|dKKzS
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/** a'3|EWS
?
* @param data K1i@.`na/$
* @param j zF'LbQz0[
* @param i Lh eOGM
*/ DL$O274uZ
private void insertSort(int[] data, int start, int inc) { XNODDH
int temp; `<}Q4p
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc); _`'VOY`o
} Wx~N1+
} X6hm,0[
} ;Ih:$"$!
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} i|5.DhK}
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快速排序: J@$h'YUF
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package org.rut.util.algorithm.support; BCy#
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import org.rut.util.algorithm.SortUtil; 2/[J<c\G
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/** s.VtmAH
* @author treeroot l-?B1gd,l
* @since 2006-2-2 of? hP1kl[
* @version 1.0 K9\p=H^T7
*/ H?\b
public class QuickSort implements SortUtil.Sort{ wrtJ8O(
OQl7#`G!H%
/* (non-Javadoc) TV&:`kH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r1vF/yt(
*/ yDmNPk/
public void sort(int[] data) { `XT8}9z!
quickSort(data,0,data.length-1); OFc Lh
} nd~cpHQR^
private void quickSort(int[] data,int i,int j){ J/OG\}
int pivotIndex=(i+j)/2; <]{$XcNm
file://swap e,*E`ol
SortUtil.swap(data,pivotIndex,j); _c[Bjip
!'yCB9]O
int k=partition(data,i-1,j,data[j]); VTM*=5|c
SortUtil.swap(data,k,j); OAlV7cfD
if((k-i)>1) quickSort(data,i,k-1); #Tm^$\*h\]
if((j-k)>1) quickSort(data,k+1,j); }q8|t3
"$@>n(w
} x?5D>M/Y
/** {Y0Uln5u
* @param data F?h{IH
f
* @param i {0~ Sj%Ze
* @param j >"Tivc5
* @return
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*/ S}mZU!
private int partition(int[] data, int l, int r,int pivot) { h!@t8R
do{ 3
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while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot); ]'
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SortUtil.swap(data,l,r); S_ELZO#7
} ^a ,Oi%
while(l SortUtil.swap(data,l,r); 3mmp5 d
return l; } vx+/J
} fLGZ@-qA0
i!AFXVX
} $-x@P9im
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改进后的快速排序: PIo8m f/
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package org.rut.util.algorithm.support; $C&y-Hnar
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import org.rut.util.algorithm.SortUtil; 6R`q{}.
*!mT#Vm^
/** QB3vp4pBg@
* @author treeroot =x_~7 Xc{
* @since 2006-2-2 rzl0*CR
* @version 1.0 ]H%SGQPn
*/ -}_X'h&"
public class ImprovedQuickSort implements SortUtil.Sort { ,RA;X
Y! 8 I
private static int MAX_STACK_SIZE=4096; 3izGMH_`
private static int THRESHOLD=10; sN"JVJXi
/* (non-Javadoc) Ah_,5Z@&R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9i^dQV.U=
*/ +1uAzm4SL
public void sort(int[] data) { \E}YtN#
int[] stack=new int[MAX_STACK_SIZE]; }3%L3v&
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int top=-1; %$'YP
int pivot; {Yt@H
int pivotIndex,l,r; 0`=>/Wr39
&1ZqC;
stack[++top]=0; /V>q(Q
stack[++top]=data.length-1; Xyz w.%4c
1o
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while(top>0){ #0:N$'SZ
int j=stack[top--]; gG?sLgL:
int i=stack[top--]; "A4.2
d_ [l{
pivotIndex=(i+j)/2; f+WN=-F\
pivot=data[pivotIndex]; jPDk~|
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SortUtil.swap(data,pivotIndex,j); mi`jY0e2
YA?46[:
file://partition $;k2b4u
l=i-1; 2#y-3y<G
r=j; Qp?+G~*
do{ [B2g{8{!
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot)); CO<P$al
SortUtil.swap(data,l,r); MS>QU@z7c
} n7>L&?N#y#
while(l SortUtil.swap(data,l,r); "t
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SortUtil.swap(data,l,j); {S$]I)tV
mdNIC
if((l-i)>THRESHOLD){ CogN1,GJ
stack[++top]=i; +N3f{-{"Yo
stack[++top]=l-1; X~o6Xkg
} Rr% CP[bH
if((j-l)>THRESHOLD){ [$x&J6jF.
stack[++top]=l+1; ^!FLi7X
stack[++top]=j; .XZq6iF9
} l`mNOQ@}'
8Ry%HV9VE
} EE,57(
file://new InsertSort().sort(data); SJ%h.u@&@F
insertSort(data); (X{o =co,
} llK7~uOC
/** uXm_ pQpF
* @param data IEP^u
`}
*/ z P`&X:8
private void insertSort(int[] data) { R?Dc*,
int temp; 7_G$&
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1); mne?r3d
} #X`qkW.T<
} -Uj3?W
} ) 8_x
1SwKd*aRR?
} phc9esz
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归并排序: x^959QO~
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package org.rut.util.algorithm.support; \F'tl{'\@
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import org.rut.util.algorithm.SortUtil; 02F\1fXS
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/** yh'P17N|q
* @author treeroot <J
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* @since 2006-2-2 ],l}J'.8<V
* @version 1.0 |z
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*/ >u0B ~9_E
public class MergeSort implements SortUtil.Sort{ qF? n&>YG
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/* (non-Javadoc) VJoobu1h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p*Q *}V
*/ -|WQs'%O
public void sort(int[] data) { '[ zy%<2sL
int[] temp=new int[data.length]; 1Y6DzWI
mergeSort(data,temp,0,data.length-1); [vNaX%o
} ;) (F4
ej;\a:JL
private void mergeSort(int[] data,int[] temp,int l,int r){ #*zl;h1(
int mid=(l+r)/2; >S[NI<=8S
if(l==r) return ; 7,IH7l|G
mergeSort(data,temp,l,mid); ;3P~eeQR
mergeSort(data,temp,mid+1,r); J9V,U;"\
for(int i=l;i<=r;i++){ D>`lN
temp=data; XPfheV G
} ')82a49eA
int i1=l; J};=)xLX;
int i2=mid+1; Fs 95^T
for(int cur=l;cur<=r;cur++){ d#>iFD+
if(i1==mid+1) (DTXc2)c
data[cur]=temp[i2++]; z <jH{AU
else if(i2>r) %-Oo92tP
data[cur]=temp[i1++]; p
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else if(temp[i1] data[cur]=temp[i1++]; 3o.9}`/
else i[N=.
data[cur]=temp[i2++]; @@pI>~#zh
} =hq+9 R8=
} ?(2^lH~6h
QG8X{'
} T@?uA*J
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改进后的归并排序: 277Am*2
H"vy[/UcR
package org.rut.util.algorithm.support; [39
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import org.rut.util.algorithm.SortUtil; Ra-%,cS
RKtU@MX49
/** .DN)ck:e;
* @author treeroot Y| 2Gj(*8
* @since 2006-2-2 J5j3#2l
* @version 1.0 nm{J
*/ w\{oOlE
public class ImprovedMergeSort implements SortUtil.Sort { 56l1&hp8In
haoQr)S
private static final int THRESHOLD = 10; [[A}MF*@
'^ob3N/Y [
/* xL#UMvZ>;h
* (non-Javadoc) @";zM&
* upefjwm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7:P+ S%ZL
*/ qf?X:9Wt
public void sort(int[] data) { ;%V)lP "o
int[] temp=new int[data.length]; E%np-is{1
mergeSort(data,temp,0,data.length-1); -+,3aK<[
} Jd-u?
] IeyJ
private void mergeSort(int[] data, int[] temp, int l, int r) { 96]!*}
int i, j, k; 3{ FUFx
int mid = (l + r) / 2; L>>Cx`ASi
if (l == r) N~0~1
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return; N[j*Q 8X_
if ((mid - l) >= THRESHOLD) a%NSL6
mergeSort(data, temp, l, mid); 0sGAC
else G Z~W#*|V
insertSort(data, l, mid - l + 1); [W,} &
if ((r - mid) > THRESHOLD) |4?O4QN
mergeSort(data, temp, mid + 1, r); g|V md
else s;!Tz)
insertSort(data, mid + 1, r - mid); T$vDw|KSVP
-V'h>K
for (i = l; i <= mid; i++) { (I0QwB
temp = data; 8TV
"9{
n
} ?o883!&v
for (j = 1; j <= r - mid; j++) { xa]e9u%
temp[r - j + 1] = data[j + mid]; 9%6W_0>
} %5rC`9^
int a = temp[l];
bMDj+i
int b = temp[r]; XmI63W*
for (i = l, j = r, k = l; k <= r; k++) { yf@DaIG
if (a < b) { Unc_e
data[k] = temp[i++]; -JwwD6D
a = temp; 2|:xb9#
} else { e0cVg
data[k] = temp[j--]; T(4OPiKu
b = temp[j]; A2{s?L,
} [)KLmL%
} u~\I
} s$PPJJT{b
XPd@>2
/** r.#"he_6!.
* @param data _+NM<o#A
* @param l YfZ96C[a
* @param i f>kW\uC
*/ i?D
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private void insertSort(int[] data, int start, int len) { CF0i72ul5
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jp|1S^b
} *@SZ0
} Im<(
} d^W1;0
} ,'z=cB`+o
86HK4sES
堆排序: `S+B-I0
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package org.rut.util.algorithm.support; m%[`NP (
XJ{b_h#N
import org.rut.util.algorithm.SortUtil; o'auCa,N
4 /Q4sE~<
/** ZCuLgCP?Z
* @author treeroot e=#'rDm
* @since 2006-2-2 >cYYr@S
* @version 1.0 qOi"3_
*/ Mlm dfO%Y
public class HeapSort implements SortUtil.Sort{ vpL3XYs`
k<i#agq
/* (non-Javadoc) LktH*ePO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V3t;V-Lkt
*/ nLc Oz3h
public void sort(int[] data) { K%iA-h
MaxHeap h=new MaxHeap(); KVA~|j B
h.init(data); hH])0C
for(int i=0;i h.remove(); &m8Z3+Ea
System.arraycopy(h.queue,1,data,0,data.length); Dg~L"
} Z@d(0 z
[44C`x[8M+
private static class MaxHeap{ V9cKl[
=}^J6+TVL
void init(int[] data){ P{ HYZg
this.queue=new int[data.length+1]; +q-/~G'
for(int i=0;i queue[++size]=data; K]s*rPT/,
fixUp(size); /lqVMlz\77
} n,vs(ZL:
} ?X5Y8n]y\h
}=T=Z#OgH
private int size=0; `iT{H]po
IyJHKDFk
private int[] queue; e_Un:r@)
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public int get() { T**v!Ls
return queue[1]; 4Ow0g-{
} IqrT@jgN-
z [9f
public void remove() { '#Pg:v_
SortUtil.swap(queue,1,size--); /.>8e%)
fixDown(1); {M&Vh]
} "2
"gTS
file://fixdown i?0+f}5<p
private void fixDown(int k) { k/]4L!/ T
int j; ]
lONi
while ((j = k << 1) <= size) { e|2@z-Sp-
if (j < size %26amp;%26amp; queue[j] j++; hiBZZ+^[
if (queue[k]>queue[j]) file://不用交换 tQSJ"Q
break; >uR0Xs;V
SortUtil.swap(queue,j,k); =QQTHL{3
k = j; %S9YjMR@
} &U7INUL
} uW4wTAk;qh
private void fixUp(int k) { }X?M6;$)
while (k > 1) { wcW8"J'AH
int j = k >> 1; RW I7eC
if (queue[j]>queue[k]) 5N.-m;s
break; 6! .nj3$*
SortUtil.swap(queue,j,k); ) u
Sg;B4
k = j; q"C(`S.@
} i$CN{c*
} 7>,(QHl
pS6p}S=1]
} TpIx!R9
ExKjH*gn
} 8DLj?M>N
5%)<e-
SortUtil: HmQ.'
.,+TpPkc
package org.rut.util.algorithm; %!X9>i>
[3|&!:4g6
import org.rut.util.algorithm.support.BubbleSort; Z(c3GmY
import org.rut.util.algorithm.support.HeapSort; -{O>'9'1A
import org.rut.util.algorithm.support.ImprovedMergeSort; JVxGS{Z
import org.rut.util.algorithm.support.ImprovedQuickSort; lo< t5~GQ
import org.rut.util.algorithm.support.InsertSort; }fT5(+ Wo
import org.rut.util.algorithm.support.MergeSort; ]q pLaBD
import org.rut.util.algorithm.support.QuickSort; e:uk``\
import org.rut.util.algorithm.support.SelectionSort; ~dz,eB
import org.rut.util.algorithm.support.ShellSort; 2uZ4$_
6>=yX6U1q^
/** fWk,k*Z9
* @author treeroot ta+MH,
* @since 2006-2-2 L5j%4BlK/
* @version 1.0 p()#+Xy
*/ lC8Z@wkjO
public class SortUtil { 'JK"3m}nT
public final static int INSERT = 1; ]9]o*{_+(f
public final static int BUBBLE = 2; oo4aw1d
public final static int SELECTION = 3; :/<SJ({q
public final static int SHELL = 4; Q}6!t$Vk
public final static int QUICK = 5; 1O,:fTG<
public final static int IMPROVED_QUICK = 6; oqUF_kh
public final static int MERGE = 7; (<KFA,
public final static int IMPROVED_MERGE = 8; w 8BSY
public final static int HEAP = 9; W{W8\
1LZ[i89&%
public static void sort(int[] data) { ~;S
sort(data, IMPROVED_QUICK); DV{0|E
} }N,$4h9Dj
private static String[] name={ +,|aIF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" K{EDmC
};
Swr
8
*'to#_n&W
private static Sort[] impl=new Sort[]{ D`NPU
new InsertSort(), kWMz;{I5*w
new BubbleSort(), 7U647G(Sg
new SelectionSort(), OUFx M
new ShellSort(), 1"yr`,}?8r
new QuickSort(), n4sO#p)'
new ImprovedQuickSort(), r?2EJE2{V
new MergeSort(), ;k|U2ajFJ
new ImprovedMergeSort(), D8 BmC
new HeapSort() {3`cSm6c
}; Em ;2fh
)eD9H*mq
public static String toString(int algorithm){ (J 1:J
return name[algorithm-1]; GTuxMg`
} nr]:Y3KyxX
VSjt|F)t
public static void sort(int[] data, int algorithm) { (|9t+KP
impl[algorithm-1].sort(data); G$mAyK:
} 9_-6Lwj6t
8yDe{
public static interface Sort { Aw$+Ew[8 2
public void sort(int[] data); ~J:]cy)Q
} cw"Ou%
s3sPj2e{
public static void swap(int[] data, int i, int j) { 9T#${NK
int temp = data; %EH{p@nM&-
data = data[j]; W+Q^u7K
data[j] = temp; SxI-pH'
} NH'Dz6K5
} MAQ(PIc>T