A.當(dāng)執(zhí)行關(guān)閉窗口操作時(shí),不做任何操作。
B.當(dāng)執(zhí)行關(guān)閉窗口操作時(shí),調(diào)用WindowsListener對(duì)象并將隱藏JFrame
C.當(dāng)執(zhí)行關(guān)閉窗口操作時(shí),退出應(yīng)用程序
D.當(dāng)執(zhí)行關(guān)閉窗口操作時(shí),調(diào)用WincowsListener對(duì)象并隱藏和銷毀Jframe