java哈夫曼树实例代码

本文实例为大家分享了哈夫曼树java代码，供大家参考，具体内容如下

package boom;
 
import java.util.arraydeque;
import java.util.arraylist;
import java.util.collections;
import java.util.list;
import java.util.queue;
 
class node<t> implements comparable<node<t>>{
  private t data;
  private int weight;
  private node<t> left;
  private node<t> right;
   
  public node (t data,int weight){
    this.data = data;
    this.weight = weight;
  }
   
  public int compareto(node<t> other) {
    if(this.weight > other.getweight()){
      return -1;
    }if(this.weight < other.getweight()){
      return 1;
    }
    return 0;
  }
 
  public t getdata() {
    return data;
  }
 
  public void setdata(t data) {
    this.data = data;
  }
 
  public int getweight() {
    return weight;
  }
 
  public void setweight(int weight) {
    this.weight = weight;
  }
 
  public node<t> getleft() {
    return left;
  }
 
  public void setleft(node<t> left) {
    this.left = left;
  }
 
  public node<t> getright() {
    return right;
  }
 
  public void setright(node<t> right) {
    this.right = right;
  }  
   
  public string tostring(){ 
    return "data:"+this.data+";weight:"+this.weight; 
  } 
}
 
public class huffuman<t> {
  static <t> node<t> create(list<node<t>> nodes){
    while(nodes.size()>1){
      collections.sort(nodes); 
      node<t> left = nodes.get(nodes.size()-1);
      node<t> right = nodes.get(nodes.size()-2);
      node<t> parent = new node<t>(null,left.getweight()+right.getweight());
      parent.setright(right);
      parent.setleft(left);
      nodes.remove(left);
      nodes.remove(right);
      nodes.add(parent);
    }
    return nodes.get(0);  
  }
  static<t> list<node<t>> breadth(node<t> root){
    list<node<t>> list = new arraylist<node<t>>();
    queue<node<t>> queue = new arraydeque<node<t>>();
    queue.offer(root);
    while(queue.size()>0){
      node<t> out = queue.poll();
      list.add(out);
      if(out.getleft()!=null){
        queue.offer(out.getleft());
      }
      if(out.getright()!=null){
        queue.offer(out.getright());
      }
    }
    return list;
  }
  public static void main(string[] args) { 
    // todo auto-generated method stub 
    list<node<string>> list = new arraylist<node<string>>(); 
    list.add(new node<string>("a",7)); 
    list.add(new node<string>("b",5)); 
    list.add(new node<string>("c",4)); 
    list.add(new node<string>("d",2)); 
      
    node<string> root =huffuman.create(list); 
    system.out.println(huffuman.breadth(root)); 
//   system.out.println(list); 
  }
    
   
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。