网友您好, 请在下方输入框内输入要搜索的题目:
本题中,主窗口有一个按钮“打开对话框”和一个文本域,单击按钮“打开对话框”后会弹出一个对话框,对话框上有两个按钮“Yes"和“N0”,单击对话框上的“Yes”和“N0”按 钮后返回主窗口,并在右侧文本域中显示刚才所单击的按钮信息。
import java.awt.event.*;
import java.awt.*;
class MyDialog implements ActionListener
{static final int YES=1,N0=0;
int message=-1;Button yes,no;
MyDialog(Frame. f.String S,boolean b)
{super(f,S,b);
ves=new Button("Yes");yes.addActionListener
(this);
no=new Button("No"); no.addActionListener
(this)o
setLayout(new FlowLayout());
add(yes);add(no);
setBounds(60,60,100,100);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{message=-1;setVisible(false);)
});
}
public void actionPerformed(ActionEvent e)
{if(e.getSource()= =yes)
{message=YES;
setVisible(false);
}
else if(e.getSource()= = no)
{message=NO;
setVisible(false);
}
}
public int getMessage()
{return message;
}
}
class Dwindow extends Frame. implements ActionLis-
tener
{TextArea text;Button button;MyDialog dialog;
Dwindow(String s)
{super(s);
text=new TextArea(5,22);button=new Button
("打开对话框");
button.addActionListener(this);
setLayout(new FlowLayout());
add(button);add(text);
dialog=new MyDialog(this,"Dialog",true);
setBounds(60,60,300,300);setVisible(true);
validate();
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent e)
{System.exit(0);}
});
}
public void actionPerformed(ActionEvent e)
{if(e.getSource()= =button)
{
if(dialog.getMessage()= =MyDialog.YES)
{text.append("\n你单击了对话框的yes按
钮");
}
else if(dialog.getMessage()= =MyDialog.NO)
{text.append("\n你单击了对话框的N0按
钮");
}
}
}
}
public class java2
{public static void main(String args[])
{new Dwindow("java2");
}
}
参考答案