第三周作业

作业 1：请在草稿纸上手写一个单例模式的实现代码。

作业 2：

package demo.pattern;

public class DrawApplication {

public static void main(String[] args) {

WinForm winform = new WinForm("主窗口");

Component picture = new Picture("LOGO 图片");

winform.add(picture);

Component loginButton = new Button("登陆");

winform.add(loginButton);

Component registButton = new Button("注册");

winform.add(registButton);

//

Frame frame = new Frame("Frame1");

Component usernameLabel = new Label("用户名");

frame.add(usernameLabel);

Component usernameTextBox = new TextBox("文本框");

frame.add(usernameTextBox);

Component passwordLabel = new Label("密码");

frame.add(passwordLabel);

Component passwordTextBox = new TextBox("密码框");

frame.add(passwordTextBox);

Component checkBox = new CheckBox("复选框");

frame.add(checkBox);

Component textBox = new TextBox("记住用户名");

frame.add(textBox);

Component linkLabel = new LinkLabel("忘记密码");

frame.add(linkLabel);

winform.add(frame);

//开始绘制窗口

winform.draw();

}

}

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package demo.pattern;

public interface Component {

public void draw();

}

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package demo.pattern;

public class Button implements Component {

private String name = null;

public Button(String name) {

this.name = name;

}

@Override

public void draw() {

System.out.println("Draw Button: "+name);

}

}

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package demo.pattern;

public class CheckBox implements Component {

private String name = null;

public CheckBox(String name) {

this.name = name;

}

@Override

public void draw() {

System.out.println("draw CheckBox: "+name);

}

}

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package demo.pattern;

public class Label implements Component {

private String text;

public Label(String text) {

this.text = text;

}

@Override

public void draw() {

System.out.println("draw Label: "+text);

}

}

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package demo.pattern;

public class LinkLabel implements Component {

private String text;

public LinkLabel(String text) {

this.text = text;

}

@Override

public void draw() {

System.out.println("draw LinkLabel: "+text);

}

}

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package demo.pattern;

public class PasswordBox implements Component {

private String name = null;

public PasswordBox(String name) {

this.name = name;

}

@Override

public void draw() {

System.out.println("draw PasswordBox: "+name);

}

}

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package demo.pattern;

public class Picture implements Component {

private String name;

public Picture(String name) {

this.name = name;

}

@Override

public void draw() {

System.out.println("Draw Picture: "+name);

}

}

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package demo.pattern;

public class TextBox implements Component {

private String name = null;

public TextBox(String name) {

this.name = name;

}

@Override

public void draw() {

System.out.println("draw TextBox: "+name);

}

}

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package demo.pattern;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

public abstract class Container implements Component {

public Container() {

}

private List<Component> children = new ArrayList<Component>();

public void add(Component c) {

children.add(c);

}

public void remove(int index) {

children.remove(index);

}

public Component getChild(int index) {

return children.get(index);

}

@Override

public void draw() {

drawSelf();

// 绘制子空间

Iterator<Component> it = children.iterator();

while (it.hasNext()) {

Component c = it.next();

c.draw();

}

}

abstract public void drawSelf();

}

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package demo.pattern;

public class Frame extends Container {

private String name;

public Frame(String name) {

this.name = name;

}

public void draw() {

super.draw();

}

@Override

public void drawSelf() {

System.out.println("draw Frame: "+name);

}

}

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package demo.pattern;

public class WinForm extends Container {

private String name;

public WinForm(String name) {

this.name = name;

}

@Override

public void drawSelf() {

System.out.println("draw WinForm: "+name);

}

}

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