Implementation method of Java minimum binary tree heap sorting
This article mainly introduces relevant information about the implementation of minimum binary tree heap sorting in java. I hope this article can help everyone. Friends in need can refer to
java implementation of minimum binary heap Examples of sorting
are written in front:
As soon as I woke up, I suddenly had inspiration...
Minimum binary heap definition:
A binary heap is a complete binary tree or an approximately complete binary tree. A minimum binary heap is one where the key value of the parent node is always less than or equal to any child. A heap of node key values.
Storage:
Binary heaps are generally represented by arrays.
The position of the root node in the array is 0, and the child nodes at the nth position are at 2n+1 and 2n+2 respectively;
The leaves at position k The position of the parent node is (k-1)/2;
Implementation:
##
/**
* @description 元素添加到末尾，和它的父节点比，如果比它小就交换
* @param array
*
* @author LynnWong
*/
private int[] getMinBinaryHeap(int[] array){
int N = array.length;
int minBinaryHeap[] = new int[N];
int root;//根的值
int heapSize = 0;//记录插入位置
for(int num : array){
minBinaryHeap[heapSize]=num;
++heapSize;
int pointer = heapSize-1;//当前指向的数组元素位置
while(pointer!=0){
int leafPointer = pointer;//叶子节点位置
pointer = (pointer-1)/2;//根节点位置
root = minBinaryHeap[pointer];//根节点
if(num>=minBinaryHeap[pointer]){//永远把当前数组元素看成叶子与其根比较或者换位
break;
}//如果根比叶子大 就交换位置
minBinaryHeap[pointer] = num;
minBinaryHeap[leafPointer] = root;
}
}
return minBinaryHeap;
}/***
* 用随机数测试二叉堆排序
* 测试10遍，强迫症似的变态...
*/
public void text(){
for(int i=0;i<10;i++){
Random rnd = new Random();
int [] lala = {rnd.nextInt(6),rnd.nextInt(6),rnd.nextInt(6),rnd.nextInt(6),rnd.nextInt(6),rnd.nextInt(6)};
System.out.print("输入：");
for(int a : lala){
System.out.print(a+" ");
}
System.out.println();
int []array = this.getMinBinaryHeap(lala);
System.out.print("输出：");
for(int a : array){
System.out.print(a+" ");
}
System.out.println();
}
}The above is the detailed content of Implementation method of Java minimum binary tree heap sorting. For more information, please follow other related articles on the PHP Chinese website!
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