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六大设计原则是根本，需要理解和贯通

单例设计模式

public class Emperor{	public static Emperor emperor = new Emperor();		private Emperor()	{			}	public static Emperor getEmperorInstance()	{		return emperor;	}		public static void say()	{		System.out.println("皇帝:" +emperor);	}}

public interface Hum{	public void talk();	public void getColor();}

public class YellowHum implements Hum{	@Override	public void talk()	{		System.out.println("黄种人");	}	@Override	public void getColor()	{		// TODO Auto-generated method stub		System.out.println("黄种人在说话");			}}

public abstract class AbstractHumFactory{	public abstract 
   
    T createHum(Class
    
      c);}
    
   

public class HumFactory extends AbstractHumFactory{	@Override	public 
   
     T createHum(Class
    
      c)	{		Hum human = null;		try		{			human = (Hum) Class.forName(c.getName()).newInstance();		}catch(Exception e)		{			System.out.println("创早错误");		}		return (T)human;	}}
    
   

public static void main(String[] args)	{		AbstractHumFactory factory = new HumFactory();				System.out.println("黄色");		Hum hum = factory.createHum(YellowHum.class);			hum.getColor();		hum.talk();	}

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