abstract class Base {
    public Base( String foo ) {
        // do some magic
    }
}

我还有一些扩展Base的类.它们没有太多逻辑.我想用Base的构造函数实例化它们,而不必在这些派生类中编写一些代理构造函数.当然,我想用Reflection实例化那些派生类.说：

Class cls = SomeDerivedClass.class;
Constructor constr;
constr = cls.getConstructor( new Class[] { String.class } ); // will return null
Class clsBase = Base.class;
constr = clsBase.getConstructor( new Class[] { String.class } ); // ok
Base obj = (Base) constr.newInstance( new Object[] { "foo" } ); // will throw InstantiationException because it belongs to an abstract class

任何想法,我如何用Base的构造函数实例化派生类？或者我必须声明那些愚蠢的代理构造函数？