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发布于: 2020 年 06 月 23 日

单例模式手写：
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组合模式代码：
package designpattern;
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import java.util.ArrayList;
import java.util.List;
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abstract class Component {
	protected String text;
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	public Component(String text) {
		this.text = text;
	}
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	public String getText() {
		return text;
	}
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	public abstract void print();
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}
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public class WinForm extends Component {
	public WinForm(String text) {
		super(text);
	}
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	private List<Component> subNodes = new ArrayList<>();
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	@Override
	public void print() {
		System.out.println("print WinForm(" + text + ")");
		for (Component node : subNodes) {
			node.print();
		}
	}
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	public void addSubNode(Component component) {
		subNodes.add(component);
	}
	
	public static void main(String[] args) {
		WinForm wf = new WinForm("WINDOW窗口");
		Picture p1 = new Picture("LOGO图片");
		Button b1 = new Button("登录");
		Button b2 = new Button("注册");
		wf.addSubNode(p1); wf.addSubNode(b1); wf.addSubNode(b2);
		
		Frame f1 = new Frame("FRAME1");
		Lable l1 = new Lable("用户名");
		TextBox tb1 = new TextBox("文本框");
		Lable l2 = new Lable("密码");
		PasswordBox pb1 = new PasswordBox("密码框");
		CheckBox cb1 = new CheckBox("复选框");
		TextBox tb2 = new TextBox("记住用户名");
		LinkLabel ll1 = new LinkLabel("忘记密码");
		f1.addSubNode(l1); f1.addSubNode(tb1);f1.addSubNode(l2);f1.addSubNode(pb1);
		f1.addSubNode(cb1); f1.addSubNode(tb2); f1.addSubNode(ll1);
		
		wf.addSubNode(f1);
		wf.print();
	}
}
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class Picture extends Component {
	public Picture(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print Picture(" + text + ")");
	}
}
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class Button extends Component {
	public Button(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print Button(" + text + ")");
	}
}
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class Frame extends Component {
	public Frame(String text) {
		super(text);
	}
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	private List<Component> subNodes = new ArrayList<>();
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	@Override
	public void print() {
		System.out.println("print Frame(" + text + ")");
		for (Component node : subNodes) {
			node.print();
		}
	}
	
	public void addSubNode(Component component) {
		subNodes.add(component);
	}
}
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class Lable extends Component {
	public Lable(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print Lable(" + text + ")");
	}
}
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class PasswordBox extends Component {
	public PasswordBox(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print PasswordBox(" + text + ")");
	}
}
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class CheckBox extends Component {
	public CheckBox(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print CheckBox(" + text + ")");
	}
}
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class TextBox extends Component {
	public TextBox(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print TextBox(" + text + ")");
	}
}
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class LinkLabel extends Component {
	public LinkLabel(String text) {
		super(text);
	}
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	@Override
	public void print() {
		System.out.println("print LinkLabel(" + text + ")");
	}
}
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