菜单为何不起作用
class InputArea extends Panel implements ActionListener{
File f=null;
RandomAccessFile out;
Box baseBox,boxV1,boxV2;
TextField name,email,phone;
Button button;
InputArea(File f)
{
setBackground(Color.cyan);
this.f=f;
name=new TextField(12);
email=new TextField(12);
phone=new TextField(12);
button=new Button("录入");
button.addActionListener(this);
boxV1=Box.createVerticalBox();
boxV1.add(new Label("输入姓名"));
boxV1.add(Box.createVerticalStrut(8));
boxV1.add(new Label("输入email"));
boxV1.add(Box.createVerticalStrut(8));
boxV1.add(new Label("输入电话"));
boxV1.add(Box.createVerticalStrut(8));
boxV1.add(new Label("单击录入"));
boxV2=Box.createVerticalBox();
boxV2.add(name);
boxV2.add(Box.createVerticalStrut(8));
boxV2.add(email);
boxV2.add(Box.createVerticalStrut(8));
boxV2.add(phone);
boxV2.add(Box.createVerticalStrut(8));
boxV2.add(button);
baseBox=Box.createHorizontalBox();
baseBox.add(boxV1);
baseBox.add(Box.createHorizontalStrut(10));
baseBox.add(boxV2);
add(baseBox);
}
public void actionPerformed(ActionEvent e)
{
try
{
RandomAccessFile out=new RandomAccessFile(f,"rw");
if(f.exists())
{
long length=f.length();
out.seek(length);
}
out.writeUTF("姓名:"+name.getText());
out.writeUTF("email:"+email.getText());
out.writeUTF("电话:"+phone.getText());
out.close();
}
catch(IOException ee){
}
}
}
class CommFrame extends Frame implements ActionListener
{
File file=null;
MenuBar bar;
Menu fileMenu;
MenuItem 录入,显示;
TextArea show;
InputArea inputMessage;
CardLayout card=null;
Panel pCenter;
CommFrame()
{
file=new File("通讯录.txt");
录入=new MenuItem("录入");
显示=new MenuItem("显示");
bar=new MenuBar();
fileMenu=new Menu("菜单选项");
fileMenu.add("录入");
fileMenu.add("显示");
bar.add(fileMenu);
setMenuBar(bar);
录入.addActionListener(this);
显示.addActionListener(this);
inputMessage=new InputArea(file);
show=new TextArea(12,20);
card=new CardLayout();
pCenter=new Panel();
pCenter.setLayout(card);
pCenter.add("录入",inputMessage);
pCenter.add("显示",show);
add(pCenter,BorderLayout.CENTER);
addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});
setVisible(true);
setBounds(100,50,420,380);
validate();
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==录入)
{
card.show(pCenter,"录入");
}
if(e.getSource()==显示)
{
int number=1;
show.setText(null);
card.show(pCenter,"显示");
try
{
RandomAccessFile in=new RandomAccessFile(file,"r");
String 姓名=null;
while((姓名=in.readUTF())!=null)
{
show.append("\n"+number+" "+姓名);
show.append(in.readUTF());
show.append(in.readUTF());
show.append("\n---------------------");
number++;
}
in.close();
}
catch(Exception ee){
}
}
}
}
class B
{
public static void main(String args[])
{
new CommFrame();
}
}
大家帮忙看看我的菜单为什么没起到作用？按了菜单却不会转换
