CompositeClient.java

package designpattern.structural.composite;

/**
 * 客户端。通过Component接口操作组合部件的对象
 *
 * @author yangll
 */
public class CompositeClient {

    public static void main(String[] args) {
        // 生成树根，根上长出两叶Leaf A和Leaf B
        Composite root = new Composite("root");
        root.add(new Leaf("Leaf A"));
        root.add(new Leaf("Leaf B"));

        // 根上长出分支Composite X，分支上也有两叶Leaf X-A和Leaf X-B
        Composite compositeX = new Composite("Composite X");
        compositeX.add(new Leaf("Leaf X-A"));
        compositeX.add(new Leaf("Leaf X-B"));
        root.add(compositeX);

        // 在Composite X上再长出分支Composite X-Y，分支上也有两叶Leaf X-Y-A和Leaf X-Y-B
        Composite compositeXY = new Composite("Composite X-Y");
        compositeXY.add(new Leaf("Leaf X-Y-A"));
        compositeXY.add(new Leaf("Leaf X-Y-B"));
        compositeX.add(compositeXY);

        // 显示大树的样子
        root.display(1);
    }
}