AD838设备功能菜单F5中有()功能
A.吸取框架到轨道位置
B.复位上料架
C.重新设定上料架
D.重新添加框架
A.吸取框架到轨道位置
B.复位上料架
C.重新设定上料架
D.重新添加框架
import java.awt.*;
import java.awt.event.*;
class CanvasWithPopup extends Canvas{
Popupmenu popup;
CanvasWithPopup(PopupMenu popup){
enableEvents(AWTEvent.MOUSE EVENT
MASK):
this.popup=popup;
}
void addPopup(){
add(popup);
}
void removePopup(){
remove(popup);
}
protected void processMouseEvent(MouseEvent
evt){
if(popup.getParent()!=null&;&;evt.isPop-
upTrigger()){
popup.show(evt.getComponent(),evt.getX(),
evt.getY());
}
super.processMouseEvent(evt);
}
}
public class java3 extends Frame. implements Item-
Listener,ActionListener{
Checkbox cb=new Checkbox("弹出菜单",
false);
CanvasWithPopup canvas;
java3(){
super("java3");
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
add(cb,BorderLayout.NORTH);
cb.addhemListener(this);
PopupMenu popup=new PopupMenu("Button
Control"):
popup.add("iteml");
popup.add("item2");
popup.addActionListener(this);
canvas=new CanvasWithPopup(popup);
add(canvas,BorderLayout.CENTER);
setSize(100,200);
show();
}
菜单的目的是为了组织软件的功能,故菜单测试的重点是______。
A.菜单的内容
B.菜单的风格
C.菜单的位置
D.菜单的颜色