解释器模式举例_lua解释器交互模式_动态编译与解释器模式(37)

文件（Leaf节点）：

//Leaf节点public class File implements Component{    private String name;    public File(String name){        this.name = name;    }    @Override    public void addFile(Component file) {}    @Override    public Component addFolder(Component folder) { return null; }    @Override    public void removeFile(Component file) {}    @Override    public void removeFolder(Component folder) {}    @Override    public List<Component> getFiles() { return null; }    @Override    public List<Component> getFolders() { return null; }    @Override    public List<Component> getAll() { return null; }    @Override    public Iterator<Component> iterator() { return null; }    @Override    public void display() {        System.out.println(name);    }}

使用：

public class TestUse {    public static void main(String args[]){        Component root = new Folder("root");//根目录        Component folder1 = new Folder("java");        Component folder2 = new Folder("c");        Component folder3 = new Folder("c#");        Component file1 = new File("info.txt");        root.addFolder(folder1).addFolder(folder2).addFolder(folder3).addFile(file1);//添加一级目录        folder1.addFile(new File("info.java"));        Iterator<Component> iterator = root.iterator();        while(iterator.hasNext()){            Component component = iterator.next();            if(component instanceof Folder)                System.out.print("folder：");            else                System.out.print("file：");            component.display();        }    }}

本文来自电脑杂谈，转载请注明本文网址：
http://www.pc-fly.com/a/jisuanjixue/article-33893-37.html