week03 作业

发布于: 2020 年 06 月 24 日

一个单例模式的实现代码(手写):

组合模式练习:

组合模式是一种”对象的结构模式“。

组合模式(Composite Pattern)将对象组合成树形结构以表示“部分-整体”的层次结构。组合模式使得用户可以使用一致的方法操作单个对象和组合对象。

组合关系与聚合关系的区别:

(1)组合关系:在古代皇帝三宫六院,贵妃很多,但是每一个贵妃只属于皇帝。

(2)聚合关系:一个老师有很多学生,但是每一个学生又属于多个老师。

代码实现如下:

import java.util.ArrayList;
import java.util.List;
public class WinForm implements IWinComponent{
/** 名称 **/
private String name;
/** 宽度 **/
private int width;
/** 高度 **/
private int heigth;
/** 背景色 **/
private String background;
private List<WinForm> components;
public WinForm(String name) {
this.name = name;
}
public void addComponents(WinForm component) {
if(components == null){
components = new ArrayList<>();
}
components.add(component);
}
@Override
public void onClick() {
System.out.println("这是一个窗口");
}
@Override
public void draw() {
System.out.println("开始绘制一个窗口");
for(WinForm component : components){
component.draw();
}
System.out.println("窗口绘制结束");
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getHeigth() {
return heigth;
}
public void setHeigth(int heigth) {
this.heigth = heigth;
}
public String getBackground() {
return background;
}
public void setBackground(String background) {
this.background = background;
}
}

public class Picture extends WinForm{
private String src;
public Picture(String name, String src) {
super(name);
this.src = src;
}
@Override
public void draw() {
System.out.println("画一个logo,图片地址:" + src);
}
}

public class Button extends WinForm{
private String text;
public Button(String name, String text) {
super(name);
this.text = text;
}
@Override
public void draw() {
System.out.println("画一个" + text + "按钮");
}
}

import java.util.ArrayList;
import java.util.List;
public class Frame extends WinForm{
private List<Frame> components;
public Frame(String name) {
super(name);
}
public void addComponents(Frame component) {
if(components == null){
components = new ArrayList<>();
}
components.add(component);
}
@Override
public void draw() {
System.out.println("开始绘制一个Frame面板");
for(Frame component : components){
component.draw();
}
System.out.println("Frame绘制结束");
}
}

public class Lable extends Frame{
private String text;
public Lable(String name, String text) {
super(name);
this.text = text;
}
@Override
public void draw() {
System.out.println("画一个标签,文字内容:" + text);
}
}

public class TextBox extends Frame{
private String input;
public TextBox(String name) {
super(name);
}
@Override
public void draw() {
System.out.println("画一个输入框");
}
}

public class PasswordBox extends Frame{
private String password;
public PasswordBox(String name) {
super(name);
}
@Override
public void draw() {
System.out.println("画一个密码框");
}
}

public class CheckBox extends Frame{
private String text;
public CheckBox(String name, String text) {
super(name);
this.text = text;
}
@Override
public void draw() {
System.out.println("画一个复选框,文本内容:" + text);
}
}

public class LinkLable extends Frame{
private String text;
private String link;
public LinkLable(String name, String text, String link) {
super(name);
this.text = text;
this.link = link;
}
@Override
public void draw() {
System.out.println("画一个链接标签,文字内容:" + text + ",链接:" + link);
}
}

public class Test {
public static void main(String[] args) {
WinForm winform = new WinForm("WINDOW窗口");
Picture picture = new Picture("logo图片", "xxxx/xxx.png");
Button loginBtn = new Button("按钮-1","登录");
Button registerBtn = new Button("按钮-2","注册");
Frame frame = new Frame("FRAME1");
winform.addComponents(picture);
winform.addComponents(loginBtn);
winform.addComponents(registerBtn);
winform.addComponents(frame);
Lable lable1 = new Lable("标签1","用户名");
TextBox textBox = new TextBox("文本框");
Lable lable2 = new Lable("标签2","密码");
PasswordBox passwordBox = new PasswordBox("密码框");
CheckBox checkBox = new CheckBox("复选框", "记住用户名");
LinkLable linkLable = new LinkLable("链接标签", "忘记密码", "xxxx/xxx.html");
frame.addComponents(lable1);
frame.addComponents(textBox);
frame.addComponents(lable2);
frame.addComponents(passwordBox);
frame.addComponents(checkBox);
frame.addComponents(linkLable);
winform.draw();
}
}

public interface IWinComponent {
void onClick();
void draw();
}

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week03 作业