设计模式(11)-组合模式（Composite）

设计模式(10)-桥接模式（Bridge）

     11、组合模式（Composite）    

         组合模式有时又叫部分-整体模式，在处理类似树形结构的问题时比较方便

         例子:      //节点类
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();
}
}  

//表示一个树状结构
public class Tree {

TreeNode root = null;

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

//测试类
public class Test{

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!");
}
}