获取另一个活动的字符串

(i want to make an app to show 40 articles of a news website.) I have a problem with getting a String to another class. I have a String "link" in my "Menu1.java" and want to use it in the "Menu1_1_Artikel.java". The Getter Method is working. But i dont know how to set the value of "link".. Every time i try it it only gets "null" instead of the link of the article which is clicked on the listview. :/(i want to make an app to show 40 articles of a