错误：找不到符号＆＃39; MENU_SELECTION_MANAGER_LISTENER_KEY＆＃39;

Question

我编译了jdk源代码（jdk-7u79-linux-x64.tar.gz）并遇到以下错误。

jdk_src/javax/swing/MenuSelectionManager.java:66: error: cannot find symbol
                Object o = context.get(SwingUtilities2.MENU_SELECTION_MANAGER_LISTENER_KEY);
                                                      ^
  symbol:   variable MENU_SELECTION_MANAGER_LISTENER_KEY
  location: class SwingUtilities2

SwingUtilities2.java中根本没有src.zip，无处可定义MENU_SELECTION_MANAGER_LISTENER_KEY。如何解决？