下面ChangeTitle()中对b1和b2按钮构造监听器，实现当单击b1按钮时标题

发布时间：2017-07-04 14:26 │ 来源：www.tikuol.com

题型：填空题

问题：

下面ChangeTitle()中对b1和b2按钮构造监听器，实现当单击b1按钮时标题变为 students，当单击b2按钮时标题变为teachers。请将程序补充完整。 publicChangeTitle(){ super(“TitleBar”)； b1.add AcdtionListener(this)； JpanelpanexneWJpanel()； Pane.add(b1)； Pane.add(b2)； SetCOntentPane(pane)； } public VOidaction Performed(ActiOnEventev0{ Objectsourve=evt.getSOurce()； if(SOUrve＝b1) setTitle("Students")； elSeif(source==b2) SetTitle("TeaCherS")； repaint()； }

选择正确的答语
( ) 1. What will you do for the summer holiday? ( ) 2. What do you like to do? ( ) 3. What are these on the tree? ( ) 4. What will you do at the ocean? ( ) 5. What is Jenny doing?	A. I will make a sand animal. B. They're apples and leaves. C. I like to skip. D. She is running. E. I'm going to Shanghai.