Java课程实践/飞机大战/单例模式与工厂模式UML类图（个人学习记录留档）

#单例模式主要实现方式：饿汉、懒汉、双重校验锁

public class HeroAircraft extends AbstractAircraft {

    private volatile static HeroAircraft heroAircraft;//私有唯一实例

	//构造方法私有
    private HeroAircraft(int locationX, int locationY, int speedX, int speedY, int hp) {
        super(locationX, locationY, speedX, speedY, hp);
    }
	
	//唯一对外接口
    public static HeroAircraft getHeroAircraft() {
        if (heroAircraft == null) {
            synchronized (HeroAircraft.class) {
                if (heroAircraft == null) {
                    heroAircraft = new HeroAircraft(Main.WINDOW_WIDTH / 2,
                            Main.WINDOW_HEIGHT - ImageManager.HERO_IMAGE.getHeight() ,
                            0, 0, 100);
                }
            }
        }
        return heroAircraft;
    }
    
}

public interface EnemyFactory {
    public AbstractEnemyAircraft createEnemy();
}

public class MobEnemyFactory implements EnemyFactory{

    @Override
    public AbstractEnemyAircraft createEnemy(){
        return new MobEnemy((int) ( Math.random() * (Main.WINDOW_WIDTH -ImageManager.MOB_ENEMY_IMAGE.getWidth()))*1,(int) (Math.random() * Main.WINDOW_HEIGHT * 0.2)*1,0,10,30);
    }
}

public class EliteEnemyFactory implements EnemyFactory{

    @Override
    public AbstractEnemyAircraft createEnemy(){
        return new EliteEnemy(
                (int) ( Math.random() * (Main.WINDOW_WIDTH -ImageManager.MOB_ENEMY_IMAGE.getWidth()))*1,(int) (Math.random() * Main.WINDOW_HEIGHT * 0.2)*1,0,10,30);
    }
}

public class BossEnemyFactory implements EnemyFactory{

    @Override
    public AbstractEnemyAircraft createEnemy(){
        return new BossEnemy(
                (int) ( Math.random() * (Main.WINDOW_WIDTH - ImageManager.MOB_ENEMY_IMAGE.getWidth()))*1,(int) (Math.random() * Main.WINDOW_HEIGHT * 0.2)*1,0,10,30)
    }
}