第三周作业

1.手写单列模式：

2.利用组合模式编写程序:





1)抽象出共有的特征：

public interface UIElement {



public void show();

public void addElement(UIElement elem);

}

2）实现组合节点的元素：

public class WinForm implements UIElement{



private List<UIElement> list = new ArrayList<UIElement>();

private String eleName;

public WinForm(String ele) {

this.eleName = ele;

}

@Override

public void show() {

System.out.println("This is " + this.eleName);

for(UIElement ele : list) {

ele.show();

}

}



@Override

public void addElement(UIElement elem) {

this.list.add(elem);

}



}

3）实现叶子节点：

public class PasswordBox implements UIElement{



private String eleName;

public PasswordBox(String ele) {

this.eleName = ele;

}

@Override

public void show() {

// TODO Auto-generated method stub

System.out.println("This is " + this.eleName);

}



@Override

public void addElement(UIElement elem) {

}



}



4）测试：

public class Test {



public static void main(String[] args) {

// new Test().test1();

new Test().test2();

}

public void test1() {

ComplexElement win = new ComplexElement("WINDOWS窗口");

win.addElement(new SimpleElement("Picture"));

win.addElement(new SimpleElement("Button(登录)"));



ComplexElement frame = new ComplexElement("Frame");

frame.addElement(new SimpleElement("Lable"));

frame.addElement(new SimpleElement("TextBox"));



win.addElement(frame);



win.show();

}



public void test2() {

WinForm win = new WinForm("WINDOW窗口");

win.addElement(new PictureLogo("Picture(LOGO图片)"));

win.addElement(new Button("Button(登录)"));

win.addElement(new Button("Button(注册"));

Frame frame = new Frame("Frame(FRAME1)");

frame.addElement(new Lable("Lable(用户名)"));

frame.addElement(new TextBox("TextBox(文本框)"));

frame.addElement(new Lable("Lable(密码)"));

frame.addElement(new PasswordBox("PasswordBox(密码框)"));

frame.addElement(new CheckBox("CheckBox(复选框)"));

frame.addElement(new TextBox("TextBox(记住用户名)"));

frame.addElement(new LinkLable("LinkLable(忘记密码)"));

win.addElement(frame);

win.show();

}

}