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快速排序: :wZZ 1qa
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package org.rut.util.algorithm.support; (tgaH,G
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import org.rut.util.algorithm.SortUtil; `+uXL9mo
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/** RBXoU'.
* @author treeroot -O5m@rwt<
* @since 2006-2-2 KkY22_{ac
* @version 1.0 eBB
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*/ ;vitg"Zh>
public class QuickSort implements SortUtil.Sort{ S6mmk&n
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/* (non-Javadoc) cF2/}m]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) H
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*/ =X*E(.6Ip
public void sort(int[] data) { Fo#*_y5\
quickSort(data,0,data.length-1); b ~gF,^w
} LPO" K"'w
private void quickSort(int[] data,int i,int j){ S\A[Z&k0
int pivotIndex=(i+j)/2; hd~rC*I
//swap rx/6x(3
SortUtil.swap(data,pivotIndex,j); 2. _cEY34
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int k=partition(data,i-1,j,data[j]); @-}]~|<
SortUtil.swap(data,k,j); brWt
if((k-i)>1) quickSort(data,i,k-1); =S,<yQJ
if((j-k)>1) quickSort(data,k+1,j); 9o`3g@6z
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} :+Kesa:E
/** ^=G+]$ 8
* @param data 9x!y.gx
* @param i v knFtpx
* @param j Vd4osBu{fY
* @return ;"Y6&YP<
*/ &UR/Txnu
private int partition(int[] data, int l, int r,int pivot) { U:r2hqegd
do{ OT i3T1&
while(data[++l] while((r!=0)&&data[--r]>pivot); w3>|mDA}I
SortUtil.swap(data,l,r); vvxj{fxb)
} 4(82dmKO
while(l SortUtil.swap(data,l,r); }3 }=tN5
return l; ([~`{,sv
} -cgukl4Va
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} vEGK{rMA
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改进后的快速排序: 5ov%(QI
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package org.rut.util.algorithm.support; ^~l<N@
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import org.rut.util.algorithm.SortUtil; [3Rj?z"S
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/** OWsYE?
* @author treeroot #9OP.4
* @since 2006-2-2 s jm79/
* @version 1.0 t;Om9
*/ Z >=Y
public class ImprovedQuickSort implements SortUtil.Sort { ,6"n5Ks}
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private static int MAX_STACK_SIZE=4096; K8Zk{on
private static int THRESHOLD=10; VKz<7K\/
/* (non-Javadoc) hm>*eJNp]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wh5O{G@Ut
*/ avu,o
public void sort(int[] data) { ;!?K.,N:N
int[] stack=new int[MAX_STACK_SIZE];
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int top=-1; 0h4}RmS
int pivot; ^<0 NIu}
int pivotIndex,l,r; QaR.8/xV
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stack[++top]=0; oE1]vX
stack[++top]=data.length-1; D|9fHMg%
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while(top>0){ Q%Q?q)x
int j=stack[top--]; 3:lp"C51
int i=stack[top--]; nX%'o`f
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pivotIndex=(i+j)/2; [t{#@X
pivot=data[pivotIndex]; !U:s.^{
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SortUtil.swap(data,pivotIndex,j); F*VMS
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//partition [oLQd-+
l=i-1; pVS2dwBqE
r=j; ^]&{"!
do{ 9PK-r;2
while(data[++l] while((r!=0)&&(data[--r]>pivot)); \/'n[3x
SortUtil.swap(data,l,r); 5C1Rub)
} u7Y< ~
while(l SortUtil.swap(data,l,r); 2-!Mao"^
SortUtil.swap(data,l,j); &> .1%x@R
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if((l-i)>THRESHOLD){ \N+Ta:U1P
stack[++top]=i; ID# qKFFW
stack[++top]=l-1; &xroms"S=
} j%jd@z ]@
if((j-l)>THRESHOLD){ O&iYGREO
stack[++top]=l+1; G D{fXhgk
stack[++top]=j; kDY]>v
} 5'Jh2r
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} ,9wenr
//new InsertSort().sort(data); R(N(@KC
insertSort(data); 7u5\#|yL
} u%T$XG
/** %yM'
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* @param data N 3p 7 0
*/ ."Ix#\|x
private void insertSort(int[] data) { g*?+~0"`Y
int temp; =GKYroNM
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); GtJ*&=(
} ANQa2swM
} )-KE 4/G
} p6Dv;@)Yn
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} ivz?-X4]
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