java编程思想-第9章接口（工厂模式）_java编程思想工厂模式-优快云博客

本文探讨了Java中工厂模式的实现方式，通过具体的代码示例展示了如何使用接口和抽象类来创建不同类型的对象。进一步，文章介绍了如何利用匿名内部类改进工厂模式，减少类的数量并提高代码的可读性和维护性。

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代码

package com.minghai.code3;

 interface Cycle{
	void ride();
}
 
 interface CycleFactory{
	 Cycle getCycle();
 }
 
 class Unicycle implements Cycle{
	public void ride() {System.out.println("ride Unicycle");}
	 
 }
 class UnicycleFactory implements CycleFactory{
	 public Cycle getCycle() {return new Unicycle();}
 }
 
 class Bicycle implements Cycle{
	 public void ride() {System.out.println("ride Bicycle");}
 }
 class BicycleFactory implements CycleFactory{
	 public Cycle getCycle() {return new Bicycle();}
 }
 
 class Tricycle implements Cycle{
	 public void ride() {System.out.println("ride Tricycle");}
 }a
 class TricycleFactory implements CycleFactory{
	 public Cycle getCycle() {return new Tricycle();}
 }

public class Cycles{
	public static void rideCycle(CycleFactory factory) {
		Cycle cycle = factory.getCycle();
		cycle.ride();
	}
	
	public static void main(String[] args) {
		rideCycle(new UnicycleFactory());
		rideCycle(new BicycleFactory());
		rideCycle(new TricycleFactory());
	}
}

使用匿名内部类改进

 interface Cycle{
	void ride();
}
 
 interface CycleFactory{
	 Cycle getCycle();
 }
 
 class Unicycle implements Cycle{
	public void ride() {System.out.println("ride Unicycle");}
	
	public static CycleFactory factory = new CycleFactory() {
		@Override
		public Cycle getCycle() {
			return new Unicycle();
		}
	};
 }
 class Bicycle implements Cycle{
	 public void ride() {System.out.println("ride Bicycle");}
	 public static CycleFactory factory = new CycleFactory() {
			@Override
			public Cycle getCycle() {
				return new Bicycle();
			}
		};
 }
 class Tricycle implements Cycle{
	 public void ride() {System.out.println("ride Tricycle");}
	 public static CycleFactory factory = new CycleFactory() {
			@Override
			public Cycle getCycle() {
				return new Tricycle();
			}
		};
 }
public class Cycles2{
	public static void rideCycle(CycleFactory factory) {
		Cycle cycle = factory.getCycle();
		cycle.ride();
	}
	
	public static void main(String[] args) {
		rideCycle(Unicycle.factory);
		rideCycle(Tricycle.factory);
		rideCycle(Bicycle.factory);
	}
}