Java实现简单树结构

简单的实现了一个树的结构，很不完善！后续参考一些其他代码的实现。

试图实现叶子存在可变的节点，能够用来解析xml文件。

叶子的代码：

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

树的代码：

package com.app;
 
 public class tree {
   
   public treeNode root;
   
   public tree(){}
     
   public void addNode(treeNode node, T newNode){
     //增加根节点
     if(null == node){
if(null == root){
  root = new treeNode(newNode);
}
     }else{
  treeNode temp = new treeNode(newNode);
  node.nodelist.add(temp);
     }
   }
   
   
   public treeNode search(treeNode input, T newNode){
   
     treeNode 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 getNode(T newNode){
     return search(root, newNode);
   }
   
   public void showNode(treeNode 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));
}      
     }
   }
 }

测试的主函数：

package com.app;
 
 public class app {
 
   
   public static void main(String[] args) {
     // TODO Auto-generated method stub
     
     
     //测试
     
     
     tree 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");
   }
 
 }

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