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快速排序: 3WM*4
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package org.rut.util.algorithm.support; c-"vQ>ux+
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import org.rut.util.algorithm.SortUtil; \,#;gS"
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/** BIEq(/-
* @author treeroot 5,+fM6^V
* @since 2006-2-2 fw5+eTQ^
* @version 1.0 PQUJUs
*/ ' g d=\gV
public class QuickSort implements SortUtil.Sort{ UOyM=#ipY
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/* (non-Javadoc) |;\pAZ2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RKZBI?@4
*/ i-9W8A
public void sort(int[] data) { jX0^1d@
quickSort(data,0,data.length-1); <fE^S
} Et
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private void quickSort(int[] data,int i,int j){ Ezev
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int pivotIndex=(i+j)/2; ?*.:*A
//swap $y{.fj y3
SortUtil.swap(data,pivotIndex,j); ;p7R~17
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int k=partition(data,i-1,j,data[j]); =!)x`1j!S
SortUtil.swap(data,k,j); ?dXAHY
if((k-i)>1) quickSort(data,i,k-1); .[+}nA,g%~
if((j-k)>1) quickSort(data,k+1,j); jz Siw z
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} hiv {A9a?
/** _2{2Xb
* @param data \Rs9B .
* @param i SYh>FF"
* @param j @urZ
* @return !?>I
*/ L={\U3 __k
private int partition(int[] data, int l, int r,int pivot) { wR,}#m,
do{ my/KsB
while(data[++l] while((r!=0)&&data[--r]>pivot); i'.D=o
SortUtil.swap(data,l,r); <oi'yr
} 3h$E^"
while(l SortUtil.swap(data,l,r); ~7FS'!W,F
return l; 1CR\!?
} <Mu T7x-
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} 5V~vND*
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改进后的快速排序: L)4~:f)B
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package org.rut.util.algorithm.support; |Qcj+HH.
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import org.rut.util.algorithm.SortUtil; `PUxR8y
s}-j.jzB{
/** $j8CF3d.6
* @author treeroot fP6\Ur
* @since 2006-2-2 =M}tet
}
* @version 1.0 It<VjN9
*/ bxzx@sF2l
public class ImprovedQuickSort implements SortUtil.Sort { HAo=t
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private static int MAX_STACK_SIZE=4096; w~:F?
private static int THRESHOLD=10; 6(x53y__
/* (non-Javadoc) ;Qi!~VsP;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p1hF.
*/ MK1#^9Zr
public void sort(int[] data) { sSc~q+xz
int[] stack=new int[MAX_STACK_SIZE]; `%^w-'
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int top=-1; )\PX1 198
int pivot; IuA4eDr^Y%
int pivotIndex,l,r; OnhR`
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stack[++top]=0; q/Vl>t
stack[++top]=data.length-1; ^)GaVL^"5
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while(top>0){ C<(qk _
int j=stack[top--]; zbr^ul r
int i=stack[top--]; <6s@eare8
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pivotIndex=(i+j)/2; rA^=;?7Q
pivot=data[pivotIndex];
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SortUtil.swap(data,pivotIndex,j); J}+N\V~
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//partition ?3qp?ea
l=i-1; >56fa6=3@
r=j; WW+F9~S
do{ XR3 dG:
while(data[++l] while((r!=0)&&(data[--r]>pivot)); >I<}:=
SortUtil.swap(data,l,r); I3b*sx$
} uMpuS1
while(l SortUtil.swap(data,l,r); +IWf~|s
SortUtil.swap(data,l,j); K:kb&W
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if((l-i)>THRESHOLD){ SAj#+_db
stack[++top]=i; cNFHbMd
stack[++top]=l-1; jKo9y
} GmE`YW
if((j-l)>THRESHOLD){ H "5,To
stack[++top]=l+1; u!HX`~q+A
stack[++top]=j; 9+$IulOvk
} p|NY.N
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} GN
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//new InsertSort().sort(data); ~7PiIky.
insertSort(data); }Y|M+0
} sa _J6~
/** PkZ1Db
* @param data AAW] Y#UwW
*/ lrwQ
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private void insertSort(int[] data) { ]~VuY:abH
int temp; @GGQ13Cj(
for(int i=1;i for(int j=i;(j>0)&&(data[j] SortUtil.swap(data,j,j-1); `IJ)'$pn
} G@Sqg
} Z!Z{Gm3
} a(*"r:/lD
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} ?.uhp
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