在Java中从字符串创建实例

如果我有两个类，“A”和“B”，如何创建一个通用工厂，这样我只需要将类名作为字符串传递就可以接收实例

例如：

public static void factory(String name) {
     // An example of an implmentation I would need, this obviously doesn't work
      return new name.CreateClass();
}

谢谢

Joel

您可以看看：

用于使用参数调用构造函数

 public static Object createObject(Constructor constructor,
      Object[] arguments) {

    System.out.println("Constructor: " + constructor.toString());
    Object object = null;

    try {
      object = constructor.newInstance(arguments);
      System.out.println("Object: " + object.toString());
      return object;
    } catch (InstantiationException e) {
      //handle it
    } catch (IllegalAccessException e) {
      //handle it
    } catch (IllegalArgumentException e) {
      //handle it
    } catch (InvocationTargetException e) {
      //handle it
    }
    return object;
  }
}

---

有一个

如何向构造函数发送参数？

System.out.println（e）请不要！为什么不简单地声明异常呢？如果您确实想通过报告来处理它，请使用
e.printStackTrace（）
。
Class c= Class.forName(className);
return c.newInstance();//assuming you aren't worried about constructor .

 public static Object createObject(Constructor constructor,
      Object[] arguments) {

    System.out.println("Constructor: " + constructor.toString());
    Object object = null;

    try {
      object = constructor.newInstance(arguments);
      System.out.println("Object: " + object.toString());
      return object;
    } catch (InstantiationException e) {
      //handle it
    } catch (IllegalAccessException e) {
      //handle it
    } catch (IllegalArgumentException e) {
      //handle it
    } catch (InvocationTargetException e) {
      //handle it
    }
    return object;
  }
}