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快速排序: rx)Q]
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package org.rut.util.algorithm.support; k18V4ATE]
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import org.rut.util.algorithm.SortUtil; WWzns[$f
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/** l$@lk?dc
* @author treeroot y$W3\`2q
* @since 2006-2-2 ZPFTNwf
* @version 1.0 V,,iKr@TG
*/ p{GDW_
public class QuickSort implements SortUtil.Sort{ ~UFsi VpL
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/* (non-Javadoc) 09i[2n;O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7guxkN#
*/ k82LCV+6
public void sort(int[] data) { BE;iC.rW
quickSort(data,0,data.length-1); RGOwm~a
} uQ)]g
private void quickSort(int[] data,int i,int j){ yQ2[[[@k@
int pivotIndex=(i+j)/2; SpQ6A]M gm
//swap WJ,ON-v
SortUtil.swap(data,pivotIndex,j); =,9'O/br
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int k=partition(data,i-1,j,data[j]); S}yb~uc,
SortUtil.swap(data,k,j); g*9>z)
if((k-i)>1) quickSort(data,i,k-1); 2sq<"TlQXI
if((j-k)>1) quickSort(data,k+1,j); C*zdHzMj
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} 6YbSzx`?k
/** I>|?B(F
* @param data `_kRvpi
* @param i 5T*7HC[
* @param j ,]'!2?
* @return 3j#F'M)s{
*/ SJe;T
private int partition(int[] data, int l, int r,int pivot) { Nzt1JHRS
do{ SesO$=y
while(data[++l] while((r!=0)&&data[--r]>pivot); J>&GP#7}
SortUtil.swap(data,l,r); 4(]('[M
} s)=7tHoqB)
while(l SortUtil.swap(data,l,r); ^4i3 #}
return l; 4Yk(ldR~
} OC.@C}u
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} ' JVvL
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改进后的快速排序: Er`PYE
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package org.rut.util.algorithm.support; }2"k:-g
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import org.rut.util.algorithm.SortUtil; y+<HS]vyV
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/** ;anG
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* @author treeroot |M&/(0
* @since 2006-2-2 [sRQd;+
* @version 1.0 ~CscctD{;
*/ ?U[AE -*
public class ImprovedQuickSort implements SortUtil.Sort { w0SgF/"@
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private static int MAX_STACK_SIZE=4096; +g&W