单项选择题
A.public void windowOpened(WindowEvent e) B.public void windowClosed(WindowEvent e) C.public void windowClosing(WindowEvent e) D.public void windowDeactivated(WindowEvent e)
A.接口与类的层次无关 B.通过接口说明类所实现的方法 C.通过接口可了解对象的交互界面 D.接口与存储空间有关
A.int a[] B.String[]a C.a=new ArrayList() D.a=new Array()