利用java实现数据结构中常用的插入排序和快速排序算法

上一篇 / 下一篇  2009-09-03 15:50:28 / 个人分类:数据结构&&算法

package Sort;

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class Data {51Testing软件测试网pL5X4C)dJ*mAb

 Comparable key;

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 Object value;

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 public Data() {51Testing软件测试网2_7L8BP!r#e `;q

 }

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 public Data(Data data){

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   this.key=data.key;51Testing软件测试网]qL~np7Ui PC

   this.value=data.value;51Testing软件测试网 @2B4NG#m%j7~ J

 }

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 public Data(Comparable key,Object value){51Testing软件测试网H"z)JbV$tuQ%v8Y

   this.key=key;

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   this.value=value;

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 }

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 public String toString(){

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   return "key="+key+";"+"value="+value+";"+"\n";

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 }51Testing软件测试网Fi7](D]8?

}

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 51Testing软件测试网-B,G(A p/S

Insertion.java

package Sort;51Testing软件测试网0GfB#GBw8h,U L

public class InsertionSort {

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 public InsertionSort() {

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 }

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 //直接插入排序,从下标1开始

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 public static void straightInsertionSort(Data[] data) {

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   int i, j;

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   for (i = 2; i <data.length; i++) {51Testing软件测试网"g{#U$x Oz)G1x n'x gO

     if (data[i].key.compareTo(data[i - 1].key) < 0) {

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       data[0] = data[i];//复制为监视哨51Testing软件测试网(hhBjJ5U

       for (j = i - 1; data[0].key.compareTo(data[j].key) < 0; --j) {

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         data[j + 1] = data[j];//记录右移51Testing软件测试网WDw Q:T#j:i

       }

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       data[j + 1] = data[0];//插入

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     }51Testing软件测试网I:FOe&OqN!R

   }

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 }51Testing软件测试网iN0}*u4sx)z pP

 

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 //折半插入排序,从下标1开始51Testing软件测试网$JM.B-\+tx"Ot ]9f

 public static void BinaryInsertionSort(Data[] data){

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   int i,j,low,high,mid;51Testing软件测试网wlT)^;un T

   for(i=2;i<data.length;i++){51Testing软件测试网\(E/Zi(s r?

     if (data[i].key.compareTo(data[i - 1].key) < 0) {

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       data[0]=data[i];

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       //找插入位置51Testing软件测试网}+hx[(Q#sc%I

       low=1;high=i-1;

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       while(low<=high){

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         mid =(low+high)/2;

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         if(data[0].key.compareTo(data[mid].key)<0) high=mid-1;

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         else low=mid+1;

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       }

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       //移动插入位置以后的元素

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       for(j=i-1;j>=high+1;j--){51Testing软件测试网Q!F&CN^{X@{

         data[j+1]=data[j];51Testing软件测试网(jKk Fv,f/V_)@

       }51Testing软件测试网g'?:d}Y'A

       data[high+1]=data[0];//插入51Testing软件测试网GIj)X[

     }51Testing软件测试网3Xr*XOt zk X)M

   }51Testing软件测试网}C HZ u%KIh

 }51Testing软件测试网 @B7ky7G(a

 

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 //表插入排序51Testing软件测试网,i omD]+U

 public static void ListInsertionSort(Data[] data){

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 int i,j,k;51Testing软件测试网:W1ok4`2B ZO5[jA

 //inner class:Table

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   class Table{51Testing软件测试网/K!Q PZ7K6T l

     Comparable key;51Testing软件测试网 xc+r gHe

     int next;51Testing软件测试网,K"IU_u(ry

   }

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   Table[] table=new Table[data.length];

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   for(i=1;i<data.length;i++){51Testing软件测试网*_-f s}9} T;{+D

     table[i]=new Table();

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     table[i].key=data[i].key;51Testing软件测试网aK4ufb1Ga!e3Z~;T

   }

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   table[0]=new Table();51Testing软件测试网aMp4l7{B%q5N;X

   table[0].key=new Integer(Integer.MAX_VALUE);51Testing软件测试网0?Hf%I&J4n

   table[0].next=1;

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   table[1].next=0;

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   for(i=2;i<data.length;i++){51Testing软件测试网E.r ~J4K

     for(j=0,k=table[0].next;table[k].key.compareTo(table[i].key)<=0;j=k,k=table[k].next);51Testing软件测试网-zS u@v Y}

     table[j].next=i;51Testing软件测试网)x&Gl }N0A

     table[i].next=k;

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   }51Testing软件测试网+^+\ w.u0CYSi

   Data[] newData=new Data[data.length];

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   int position=table[0].next;51Testing软件测试网i6mX#S@,q

   for(i=1;i<data.length;i++){51Testing软件测试网 n)V4e f%S N;d

     newData[i]=data[position];

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     position=table[position].next;51Testing软件测试网N VQ{`cZ|~?w

   }51Testing软件测试网$JB:J&vE

   //data=newData;//不知为什么不能把newData赋给data,而必须用下面的51Testing软件测试网 Mz+gW2w]6T

   for(i=1;i<data.length;i++){

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     data[i]=newData[i];51Testing软件测试网$cy2GG9r,K QN'@

   }

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QuickSort.java

package Sort;

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import Queue.*;51Testing软件测试网'[ qe'IJ0f ]

 

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public class QuickSort {

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 public QuickSort() {51Testing软件测试网 A6t#WY:u&Y?rT

 }

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 51Testing软件测试网A!Z K"?;cg]x$Sv

 //起泡排序51Testing软件测试网N~+{%p9l hx

 public static void BubbleSort(Data[] data) {51Testing软件测试网e/MO'lfV8B

   int i, j, lastChangeIndex;51Testing软件测试网 r9W8R AU7j

   Data temp;

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   i = data.length - 1;

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   while (i > 1) {

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     lastChangeIndex = 1;

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     for (j = 1; j < i; j++) {

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       if (data[j + 1].key.compareTo(data[j].key) < 0) {51Testing软件测试网 dN'U {*`8nI(N-K

         temp = data[j + 1];

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         data[j + 1] = data[j];

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         data[j] = temp;

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         lastChangeIndex = j;51Testing软件测试网r&e]-e e` B2g^

       }51Testing软件测试网9I6Yg8@!oW

     }

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     i = lastChangeIndex;

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   }

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 }51Testing软件测试网:g{#Q fx

 

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 //快速排序51Testing软件测试网K:A#?)|%f,o#B

 public static void QuickSort(Data[] data) {

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   QSort(data, 1, data.length - 1);

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 }

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 public static void OptimizeQuickSort(Data[] data){51Testing软件测试网-KL V9t3c o9~6Ff_ N

   OQSort(data,1,data.length-1);

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 }

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 51Testing软件测试网9y"Ibs6p8?

 private static void QSort(Data[] data, int s, int t) {51Testing软件测试网Nug%wMiv

   int pivotLoc;51Testing软件测试网"o_%cgi8Bp Z8q

   if (s < t) {51Testing软件测试网 n"^ F!c*m5{| p

     pivotLoc = Partition(data, s, t); //data[1...data.length-1]进行一次划分

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     QSort(data, s, pivotLoc - 1); //对低子序列进行递归排序

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     QSort(data, pivotLoc + 1, t); //对高子序列进行递归排序51Testing软件测试网_{R/w y{

   }51Testing软件测试网z?1fz b N3puf

 }

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 private static void OQSort(Data[] data,int s,int t){

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   int pivotLoc;

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   if(s<t){51Testing软件测试网r!eL3K3_

     pivotLoc=RandomPartition(data,s,t);

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     QSort(data, s, pivotLoc - 1); //对低子序列进行递归排序

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     QSort(data, pivotLoc + 1, t); //对高子序列进行递归排序51Testing软件测试网!Y VX h,c3o

   }

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 }

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 51Testing软件测试网2y \0r7a w,Q

 private static int RandomPartition(Data[] data,int low,int high){

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   //ilow51Testing软件测试网&c.[0ly)V/R+Ok\

   int i=(int)Math.random()*(high-low)+low;51Testing软件测试网S8l W1Z&W r#q

   Data temp=data[low];51Testing软件测试网 }'S$RV1q1nM$dZ

   data[low]=data[i];51Testing软件测试网?\(nKD

   data[i]=temp;51Testing软件测试网7VV AAV

   return Partition(data,low,high);

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 }51Testing软件测试网/|M2P0aC"b`l7i

 51Testing软件测试网/E6rs5c)? {8c"x:A

 private static int Partition(Data[] data, int low, int high) {

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   Comparable pivotKey;51Testing软件测试网}Yn`7V3RP$|P7@

   data[0] = data[low];51Testing软件测试网K+q ?H3wv JK

   pivotKey = data[low].key; //枢轴51Testing软件测试网T8ie^q

   while (low < high) {51Testing软件测试网 SI?S"fK1m

     while (low < high && data[high].key.compareTo(pivotKey) >= 0) {51Testing软件测试网 ?,[l:bp.T

       high--;

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     }

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     data[low] = data[high];

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     while (low < high && data[low].key.compareTo(pivotKey) <= 0) {51Testing软件测试网@6Zp-W8@#s(t

       low++;

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     }51Testing软件测试网 C!K^1n J yk

     data[high] = data[low];

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   }

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   data[low] = data[0];51Testing软件测试网%X:tN1~JYE@t

   return low;51Testing软件测试网$Ku Sk.zbP

 }51Testing软件测试网a9DYk#A$F

 51Testing软件测试网?l~+z'_ m

 //堆排序

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 public static void HeapSort(Data[] data) {

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   //先对顺序表进行堆排序,建立大顶堆51Testing软件测试网cP!Jv$En{oF"X'L

   int i;51Testing软件测试网#a!t/s[ BV

   Data temp;

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   for (i = (data.length-1)/2; i > 0; i--) {51Testing软件测试网d J;t1QH

     HeapAdjust(data, i, data.length-1);

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   } //建立大顶堆

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   for (i = (data.length - 1); i >1; i--) {51Testing软件测试网K^,I7P Hb)Gt}

     temp = data[1];51Testing软件测试网Y e{/TD D ?.sw"]9z

     data[1] = data[i];

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     data[i] = temp;51Testing软件测试网](`8X+Z1D*C)Uu1e?7x-l

     HeapAdjust(data, 1, i - 1);51Testing软件测试网|#C Py PffJ

   }

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 }

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 private static void HeapAdjust(Data[] data, int start, int end) {

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   int j;

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   Data temp;

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   temp = data[start];51Testing软件测试网{W nSw e'Ve2B&r ]2bX

   for (j = 2 * start; j <=end; j *=2) {51Testing软件测试网p-wp_2J?3Q

     if (j < end && data[j].key.compareTo(data[j+1].key) < 0) {

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       j++;

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     }

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     if (temp.key.compareTo(data[j].key) >= 0) {51Testing软件测试网)acW6T&|+]3xy

       break;51Testing软件测试网L*v6e6FU`n9y

     }

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     data[start] = data[j];51Testing软件测试网{I:LC5s+t[&Yb-?j.u

     start = j;51Testing软件测试网]`e:o.E-N[-r2iT~ ]

   }51Testing软件测试网gJsAx0[

   data[start] = temp;

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 }

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 //简单选择排序

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 public static void SimpleSelectSort(Data[] data) {

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   int i, j;

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   Data temp;51Testing软件测试网G"W.HAMW NJ

   for (i = 1; i < data.length; i++) {51Testing软件测试网+r[2}l.w_

     j = MinKey(data, i);

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     if (j != i) {51Testing软件测试网0g8o{9F dm)J

       temp = data[i];51Testing软件测试网a:Li&qC7~,W?@r

       data[i] = data[j];

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       data[j] = temp;51Testing软件测试网X,JSg D"|6Z

     }

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   }

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 }51Testing软件测试网!\6xl W-F

 51Testing软件测试网{"r:ot/B hO;^

 private static int MinKey(Data[] data, int start) {51Testing软件测试网3An aO9uY

   int i, j = start;

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   Comparable temp;51Testing软件测试网"gjM%oN:g

   temp = data[start].key;51Testing软件测试网:b3vh5H4o e5m fI

   if (data.length - start == 0) {

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     return start;51Testing软件测试网&H;uD*k&R:Qyp.A"Ih

TAG: 算法 java JAVA

 

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