简单工厂模式+抛出异常

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文章目录

• 前言
• 运行

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前言

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分析设计

简单工厂

public class ShapeFactory {

	public static Shape getShape(String type) throws UnsupportedShapeException{
		Shape shape  = null;
		if( type.equalsIgnoreCase("矩形") )
		{
			shape = new Rectangle();
			
		}else if( type.equalsIgnoreCase("三角形") )
		{
			shape = new Triangle();
		}else if(type.equalsIgnoreCase("圆形") )
		{
			shape = new Circle();
		}else {
			throw new UnsupportedShapeException("没有此类型的图形");
		}
		
		
		return shape;
	}
}

## 2.抽象产品

<font color=#999AAA >代码如下（示例）：



```java

public interface Shape {
	public void draw();
	public void erase();

}

3.具体产品

代码如下（示例）：

public class Circle implements Shape{
	public Circle() {
		System.out.println("创建圆形");
	}
	
	public void draw() {
		System.out.println("显示圆形");
		
	}
	
	public void erase()
	{
		System.out.println("清除圆形");
	}

}

public class Rectangle implements Shape{
	
	public Rectangle() {
		System.out.println("创建矩形");
	}
	
	public void draw() {
		System.out.println("显示矩形");
		
	}
	
	public void erase()
	{
		System.out.println("清除矩形");
	}


}


```java

public class Triangle implements Shape{
	public Triangle() {
		System.out.println("创建三角形");
	}
	
	public void draw() {
		System.out.println("显示三角形");
		
	}
	
	public void erase()
	{
		System.out.println("清除三角形");
	}

}

##4。客户端测试

```java

public class Client {

	public static void main(String[] args) throws UnsupportedShapeException{
		// TODO Auto-generated method stub

		Shape shape;
		shape = ShapeFactory.getShape("猪");
		shape.draw();
		shape.erase();
	}

}

##5.异常处理：

public class UnsupportedShapeException extends Exception {
	
	public UnsupportedShapeException(String message) {
		super(message);
		
	}

}

运行

提示：

本文地址：https://blog.csdn.net/deepthoatsmoke/article/details/109563191