Java implements simple tree structure

It simply implements a tree structure, which is very imperfect! Please refer to the implementation of some other codes later.

Trying to implement variable nodes in leaves, which can be used to parse xml files.

Leaf code:

package com.app;
  
 import java.util.ArrayList;
 import java.util.List;
  
 public class treeNode<T> {
   public T t;
   private treeNode<T> parent;
    
   public List<treeNode<T>> nodelist;
    
   public treeNode(T stype){
     t   = stype;
     parent = null;
     nodelist = new ArrayList<treeNode<T>>();
   }
  
   public treeNode<T> getParent() {
     return parent;
   } 
 }

Tree code:

package com.app;
  
 public class tree<T> {
    
   public treeNode<T> root;
    
   public tree(){}
      
   public void addNode(treeNode<T> node, T newNode){
     //增加根节点
     if(null == node){
       if(null == root){
         root = new treeNode(newNode);
       }
     }else{
         treeNode<T> temp = new treeNode(newNode);
         node.nodelist.add(temp);
     }
   }
    
   /*  查找newNode这个节点 */
   public treeNode<T> search(treeNode<T> input, T newNode){
    
     treeNode<T> temp = null;
      
     if(input.t.equals(newNode)){
       return input;
     }
      
     for(int i = 0; i < input.nodelist.size(); i++){
        
       temp = search(input.nodelist.get(i), newNode);
        
       if(null != temp){
         break;
       } 
     }
      
     return temp;
   }
    
   public treeNode<T> getNode(T newNode){
     return search(root, newNode);
   }
    
   public void showNode(treeNode<T> node){
     if(null != node){
       //循环遍历node的节点
       System.out.println(node.t.toString());
        
       for(int i = 0; i < node.nodelist.size(); i++){
         showNode(node.nodelist.get(i));
       }     
     }
   }
 }

Main function tested:

package com.app;
  
 public class app {
  
   /**
    * @param args
 */
   public static void main(String[] args) {
     // TODO Auto-generated method stub
     /*简单实现一个树的结构，后续完善解析xml       */
     /*写得满烂的，后续查阅一些其他代码        2012-3-12  */
     //测试
     /*
     * string
     *     hello
     *       sinny
     *       fredric
     *     world
     *      Hi
     *      York
     * */
      
     tree<String> tree = new tree();
     tree.addNode(null, "string");
     tree.addNode(tree.getNode("string"), "hello");
     tree.addNode(tree.getNode("string"), "world");
     tree.addNode(tree.getNode("hello"), "sinny");
     tree.addNode(tree.getNode("hello"), "fredric");
     tree.addNode(tree.getNode("world"), "Hi");
     tree.addNode(tree.getNode("world"), "York");
     tree.showNode(tree.root);
      
     System.out.println("end of the test");
   }
  
 }

The above is the entire content of this article, I hope For everyone’s learning Thank you for your help, and I hope everyone will support the PHP Chinese website.

For more articles related to Java implementation of simple tree structure, please pay attention to the PHP Chinese website!