構建一對象工廠對象,此工廠可以基於類的字節碼對象 ,構建類的實例對象.

package com.java.oop;
import java.util.Date;
//構建一對象工廠對象,此工廠可以基於類的字節碼對象
//構建類的實例對象.
class ObjectFactory{//對象工廠
	public static Object newInstance(
			Class<?> cls) throws Exception{
		//基於字節碼對象創建類的實例對象
		//字節碼對象是構建類的實例對象的模版對象
		return cls.newInstance();
	}
	//<bean id="" class="pkg.ClassName">
	public static Object newInstance(
			String className) throws Exception{
		//基於字節碼對象創建類的實例對象
		//字節碼對象是構建類的實例對象的模版對象
		Class<?> cls=
		Class.forName(className);
		return cls.newInstance();
	}
}
public class TestClassObject06 {
    public static void main(String[] args) throws Exception{
    	Date date=
        (Date)ObjectFactory.newInstance(Date.class);
    	date=(Date)ObjectFactory.newInstance(Date.class);
	    System.out.println(date);
	    date=(Date)ObjectFactory.newInstance("java.util.Date");
	    
    }
}