java编程思想-第9章接口（工厂模式）

短命女 2022-03-14 10:20 191阅读 0赞

### 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);
    	}
    }