week3. 课后作业

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发布于: 2020 年 06 月 21 日
1.手写单例模式
饱汉式、懒汉式、双重加锁、静态内部类方式实现单例模式
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2.组合设计模式打印窗口组件的树结构
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:06
 */
public interface IComponent {
    void printName();
}
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package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:07
 */
public class Component implements IComponent{
    protected String name;
    public Component(String name) {
        this.name = name;
    }
    @Override
    public void printName() {
        System.out.println("print Component(" + this.name + ")");
    }
}
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package com.demo.frame;
import java.util.ArrayList;
import java.util.List;
/**
 * @author niki-lauda
 * @create 2020-06-24 23:50
 */
public class ComplexComponent extends Component{
    private List<IComponent> components = new ArrayList<>();
    public ComplexComponent(String name) {
        super(name);
    }
    public void addChild(IComponent component) {
        components.add(component);
    }
    @Override
    public void printName() {
        for (IComponent component : components) {
            component.printName();
        }
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class ButtonComponent extends Component{
    public ButtonComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print Button(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class CheckBoxComponent extends Component{
    public CheckBoxComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print CheckBox(" + name + ")");
    }
}
﻿
package com.demo.frame;
import java.util.ArrayList;
import java.util.List;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class FrameComponent extends ComplexComponent{
    public FrameComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print Frame(" + this.name + ")");
        super.printName();
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class LabelComponent extends Component{
    public LabelComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print Label(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class LinkLableComponent extends Component{
    public LinkLableComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print LinkLable(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class PasswordBoxComponent extends Component{
    public PasswordBoxComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print PasswordBox(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class PictureComponent extends Component{
    public PictureComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print Picture(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class TextBoxComponent extends Component{
    public TextBoxComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print TextBox(" + name + ")");
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:11
 */
public class WinFormComponent extends ComplexComponent{
    public WinFormComponent(String name) {
        super(name);
    }
    @Override
    public void printName() {
        System.out.println("print WinForm(" + name + ")");
        super.printName();
    }
}
﻿
package com.demo.frame;
/**
 * @author niki-lauda
 * @create 2020-06-21 18:24
 */
public class TestFrame {
    public static void main(String[] args) {
        WinFormComponent winFormComponent = new WinFormComponent("WINDOWS窗口");
        PictureComponent pictureComponent = new PictureComponent("LOGO图片");
        winFormComponent.addChild(pictureComponent);
        ButtonComponent loginButtonComponent = new ButtonComponent("登录");
        winFormComponent.addChild(loginButtonComponent);
        ButtonComponent registerButtonComponent = new ButtonComponent("注册");
        winFormComponent.addChild(registerButtonComponent);
        FrameComponent frameComponent = new FrameComponent("FRAME1");
        winFormComponent.addChild(frameComponent);
        LabelComponent labelComponent = new LabelComponent("用户名");
        frameComponent.addChild(labelComponent);
        TextBoxComponent textBoxComponent = new TextBoxComponent("文本框");
        frameComponent.addChild(textBoxComponent);
        LabelComponent passwordLabel = new LabelComponent("密码");
        frameComponent.addChild(passwordLabel);
        PasswordBoxComponent passwordBoxComponent = new PasswordBoxComponent("密码框");
        frameComponent.addChild(passwordBoxComponent);
        CheckBoxComponent checkBoxComponent = new CheckBoxComponent("复选框");
        frameComponent.addChild(checkBoxComponent);
        TextBoxComponent rememberMeComponent = new TextBoxComponent("记住用户名");
        frameComponent.addChild(rememberMeComponent);
        LinkLableComponent linkLableComponent = new LinkLableComponent("忘记密码");
        frameComponent.addChild(linkLableComponent);
        winFormComponent.printName();
    }
}
打印结果
print WinForm(WINDOWS窗口)
print Picture(LOGO图片)
print Button(登录)
print Button(注册)
print Frame(FRAME1)
print Label(用户名)
print TextBox(文本框)
print Label(密码)
print PasswordBox(密码框)
print CheckBox(复选框)
print TextBox(记住用户名)
print LinkLable(忘记密码)
﻿