排序算法

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BubbleSort

 

package SortTest;

public class BubbleSort {
	
	 int[] a={196,182,123,104,111,106,185,194,192,159};
	 int count=a.length;
	
	public void exchange(int index1,int index2){
		int temp;
		temp=a[index1];
		a[index1]=a[index2];
		a[index2]=temp;
	}

	public static void main(String[] args) {
		BubbleSort bs=new BubbleSort();
		for(int n=bs.count-1;n>0;n--){
			for(int i=0;i<n;i++){
				if(bs.a[i]>bs.a[i+1])
					bs.exchange(i,i+1);
			}
			
			System.out.println("the  " + (10-n) + "  time:  ");
			for(int m=0;m<bs.count;m++){
				System.out.print(bs.a[m] +"  ");
				}
			System.out.println();
		}
	}
}

 

MergeSort

 

package SortTest;

import java.util.ArrayList;
import java.util.List;

public class MergeSort {
	
	 int iaArray[] = {24, 5, 3, 35, 14, 23, 19};
	 int start=0;
	 int end=0;
	 
	 void Merge(MergeSort ms,List<Integer> ipA, int iEnd1, int iEnd2) {
		    int i = 0;
		    int j = iEnd1;
		    int k = 0;
		    int[] ipTemp = new int[iEnd2];
		    // Take each next smallest element
		    while (i < iEnd1 && j < iEnd2) {
		        if (ipA.get(i) <ipA.get(j) ) {
		            ipTemp[k] = ipA.get(i) ;
		            ++i;
		        } else {
		            ipTemp[k] = ipA.get(j);
		            ++j;
		        }
		        ++k;
		    }
		    // Copy any remaining elements of the 1st array
		    while (i < iEnd1) {
		        ipTemp[k] = ipA.get(i);
		        ++i;
		        ++k;
		    }
		    // Copy any remaining elements of the 2nd array
		    while (j < iEnd2) {
		        ipTemp[k] = ipA.get(j);
		        ++j;
		        ++k;
		    }
		    // Copy the merged array back to the original
		    
		    for (int n=start; n <= end; n++) {
		    	ms.iaArray[n]=ipTemp[n-start];
		    }
		    
		}

	public static void main(String[] args) {
		MergeSort ms=new MergeSort();
	    
	   
	    int iSize = 7;

	    // Merge Sort
	    for (int i = 1; i < iSize; i *= 2) {
	        for (int j = 0; j < iSize - i; j += 2*i) {
	            int iEnd2 = (2*i < iSize - j) ? 2*i : iSize - j;
	            ArrayList<Integer> beMerged=new ArrayList<Integer>();
	            ms.start=j;
	            ms.end=j+iEnd2-1;
	            for(int n=j;n<j+iEnd2;n++){
	            beMerged.add(ms.iaArray[n]); 
	            }
	            ms.Merge(ms,beMerged, i, iEnd2);
	        }
	    }

	    // Output sorted array
	    for (int i = 0; i < iSize; i++){
	       System.out.println(ms.iaArray[i]);
	    }
	    

	    
	}
	

}

 HeapSort

package SortTest;

public class HeapSort {
	

	int Left(int iIndex) {
		return ((iIndex << 1) + 1);
	}

	int Right(int iIndex) {
		return ((iIndex << 1) + 2);
	}

	int Parent(int iIndex) {
		return ((iIndex - 1) >> 1);
	}

	void Swap(int X, int Y,int[] array) {
		int iTemp =array[X];
		array[X] =array[Y];
		array[Y] =iTemp;
	}

	int SwapWithChild(int iIndex, int[] ipHeap, int iSize) {
		int iLeft		= Left(iIndex);
		int iRight		= Right(iIndex);
		int iLargest	= iIndex;
		if (iRight < iSize) {
			if (ipHeap[iLeft] < ipHeap[iRight]) {
				iLargest = iRight;
			} else {
				iLargest = iLeft;
			}
			if (ipHeap[iIndex] > ipHeap[iLargest]) {
				iLargest = iIndex;
			}
		} else if (iLeft < iSize) {
			if (ipHeap[iIndex] < ipHeap[iLeft]) {
				iLargest = iLeft;
			}
		}
		if (ipHeap[iIndex] < ipHeap[iLargest]) {
			Swap(iIndex, iLargest,ipHeap);
		}
		return iLargest;
	}

	void RemoveRoot(int[] ipHeap, int iSize) {
		// Swap the last element with the root
		Swap(0, iSize - 1,ipHeap);
		--iSize;
		int iLasti = 0;
		int i = SwapWithChild(0, ipHeap, iSize);
		while (i != iLasti) {
			iLasti = i;
			i = SwapWithChild(i, ipHeap, iSize);
		}
	}

	int SwapWithParent(int i, int[] ipHeap) {
		if (i < 1) {
			return i;
		}
		int iParent = Parent(i);
		if (ipHeap[i] > ipHeap[iParent]) {
			Swap(i, iParent,ipHeap);
			return iParent;
		} else {
			return i;
		}
	}

	void AddElement(int iNewEntry, int[] ipHeap, int iSize) {
		ipHeap[iSize] = iNewEntry;
		int iLasti = iSize;
		int i = SwapWithParent(iLasti, ipHeap);
		while (iLasti != i) {
			iLasti = i;
			i = SwapWithParent(i, ipHeap);
		}
	}

	void OutputArray(int[] ipArray, int iBar, int iSize) {
		
		for (int i = 0; i < iSize; ++i) {
			if (i == iBar) {
				System.out.print("|  ");
			}
			System.out.print(ipArray[i] + "  " );
		}
		System.out.println();
	}

	   public static void main(String args[]){
		

		HeapSort hs=new HeapSort();

		int iaArray[]={67,65,77,38,97,3,33,49,32,44,56,78,54,87,447};
		

		 // Output the heap after each element that we add
		for (int i = 0; i < 15; ++i) {
			hs.AddElement(iaArray[i], iaArray, i);
			hs.OutputArray(iaArray, i + 1, 15);
			
			System.out.println( "---------------------------------------------"); 
		}

		 // Output the heap after each element that we remove
		for (int i = 0; i < 14; ++i) {
			hs.RemoveRoot(iaArray, 15 - i);
			hs.OutputArray(iaArray, 14 - i, 15);
			
			System.out.println( "---------------------------------------------");
		}

	  
	}

}