java设计模式之三

组合模式：使用场景：将多个对象组合在一起进行操作，常用于表示树形结构中，例如二叉树，数等。

public class TreeNode {

private String name;
private TreeNode parent;
private Vector<TreeNode> children = new Vector<TreeNode>();

public TreeNode(String name){
this.name = name;
}


public String getName() {
return name;
}


public void setName(String name) {
this.name = name;
}


public TreeNode getParent() {
return parent;
}


public void setParent(TreeNode parent) {
this.parent = parent;
}

//添加孩子节点
public void add(TreeNode node){
children.add(node);
}

//删除孩子节点
public void remove(TreeNode node){
children.remove(node);
}

//取得孩子节点
public Enumeration<TreeNode> getChildren(){
return children.elements();
}
}

public class Tree {


TreeNode root = null;


public Tree(String name) {
root = new TreeNode(name);
}


public static void main(String[] args) {
Tree tree = new Tree("A");
TreeNode nodeB = new TreeNode("B");
TreeNode nodeC = new TreeNode("C");

nodeB.add(nodeC);
tree.root.add(nodeB);
System.out.println("build the tree finished!");
}
}