一下是我打的一个程序(基本上是对着书打的^_^,去掉了其它没用的部分),编译时出现了下面的问题: cannot resolve symbol: constructor Dialog (java.awt.Frame,java.lang.String,java.lang.Boolean)in class java.awt.Dialog
我百思不得其解,直接在窗口类中创建dialog没有问题,这是怎么回事??小弟初学,愚昧。敬请赐教import java.awt.*;
import java.awt.event.*;class MyDialog extends Dialog
{
Choice c;
public MyDialog(Frame f,String s,Boolean b)
{
super(f,s,b); //////////////////////////出错位置////////////////////
setBounds(80,80,200,200);
setLayout(new FlowLayout());
c = new Choice();
c.add("选项1");
c.add("选项2");
c.add("选项3");
c.add("选项4");
c.add("选项5");
add(c);
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
setVisible(false);
}
}
);
}
}class MyFrame extends Frame implements ActionListener
{
Dialog dlg;
public MyFrame(String s)
{
super(s);
setBounds(200,200,400,400);
setLayout(new FlowLayout());
setVisible(true);
dlg = new Dialog(this,"无标题",true);
validate();
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent e)
{
}
}public class E10
{
public static void main(String args[])
{
new MyFrame("显示窗口");
}
}
我百思不得其解,直接在窗口类中创建dialog没有问题,这是怎么回事??小弟初学,愚昧。敬请赐教import java.awt.*;
import java.awt.event.*;class MyDialog extends Dialog
{
Choice c;
public MyDialog(Frame f,String s,Boolean b)
{
super(f,s,b); //////////////////////////出错位置////////////////////
setBounds(80,80,200,200);
setLayout(new FlowLayout());
c = new Choice();
c.add("选项1");
c.add("选项2");
c.add("选项3");
c.add("选项4");
c.add("选项5");
add(c);
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
setVisible(false);
}
}
);
}
}class MyFrame extends Frame implements ActionListener
{
Dialog dlg;
public MyFrame(String s)
{
super(s);
setBounds(200,200,400,400);
setLayout(new FlowLayout());
setVisible(true);
dlg = new Dialog(this,"无标题",true);
validate();
addWindowListener(
new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
);
}
public void actionPerformed(ActionEvent e)
{
}
}public class E10
{
public static void main(String args[])
{
new MyFrame("显示窗口");
}
}
boolean
Dialog(Dialog owner, String title, boolean modal)
你super是调用的超类的构造函数