Dynamically instantiate a Ruby class similar to Java

Question

How can this line in Java be translated to Ruby:
String className = "java.util.Vector";
...
Object o = Class.forName(className).newInstance();

Thanks!

Answer 1

Object::const_get('String').new()

Answer 2

如果您正在使用ActiveSupport（即Rails），则会向String添加一个方法来执行此操作：

"String".constantize.new