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  • 组合模式(Composite)

    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,看看关系图:

    直接来看代码:

    [java] view plaincopy
    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();
    }
    }
    [java] view plaincopy
    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!");
    }
    }
    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。

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  • 原文地址:https://www.cnblogs.com/juniorjava/p/7834221.html
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