11.17
用透明组合模式实现教材中的“文件夹浏览”这个例子。
实验要求：
1.文件的执行不需真正实现，只需简单提示即可；
2.提交源代码；
3.注意编程规范。
类图：
源代码：
AbstractFile.java
public abstract class AbstractFile {
public abstract void add(AbstractFile ele);
public abstract void remove(AbstractFile ele);
public abstract void display();
}
Folder.java
import java.util.ArrayList;
public class Folder extends AbstractFile{
private String filename;
private ArrayList al=new ArrayList<>();
public Folder(String f) {
filename=f;
}
@Override
public void add(AbstractFile ele) {
// TODO Auto-generated method stub
al.add(ele);
System.out.println("Folder add");
}
@Override
public void remove(AbstractFile ele) {
// TODO Auto-generated method stub
al.remove(ele);
System.out.println("Folder remove");
}
@Override
public void display() {
// TODO Auto-generated method stub
for(Object object:al)
{
((AbstractFile)object).display();
}
System.out.println("Folder:display");
}
}
ImageFile.java
public class ImageFile extends AbstractFile{
private String filename;
public ImageFile(String f) {
filename=f;
}
@Override
public void add(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("添加Image文件");
}
@Override
public void remove(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("删除Image文件");
}
@Override
public void display() {
// TODO Auto-generated method stub
System.out.println("展示Image文件"+filename);
}
}
TextFile.java
public class TextFile extends AbstractFile{
private String filename;
public TextFile(String f) {
filename=f;
}
@Override
public void add(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("添加Text文件");
}
@Override
public void remove(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("删除Text文件");
}
@Override
public void display() {
// TODO Auto-generated method stub
System.out.println("展示Text文件"+filename);
}
}
VideoFile.java
public class VideoFile extends AbstractFile{
private String filename;
public VideoFile(String f) {
filename=f;
}
@Override
public void add(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("添加Video文件");
}
@Override
public void remove(AbstractFile ele) {
// TODO Auto-generated method stub
System.out.println("删除Video文件");
}
@Override
public void display() {
// TODO Auto-generated method stub
System.out.println("展示Video文件"+filename);
}
}
Cient.java
public class Client {
public static void main(String a[])
{
AbstractFile obj1,obj2,obj3,obj4,obj5;
Folder plate1,plate2,plate3;
obj1=new ImageFile("one.png");
obj2=new TextFile("two.txt");
plate1=new Folder("three");
plate1.add(obj1);
plate1.add(obj2);
obj3=new VideoFile("four.mp3");
obj4=new VideoFile("five.mp3");
plate2=new Folder("seven");
plate2.add(obj3);
plate2.add(obj4);
obj5=new ImageFile("eight.jpg");
plate3=new Folder("nine");
plate3.add(plate1);
plate3.add(plate2);
plate3.add(obj5);
plate3.display();
}
}
