初学者关于JFrame的问题
照搬sun的tutorial中的代码如下:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class FrameDemo {
public static void main(String s[]) {
JFrame.setDefaultLookAndFeelDecorated(true);
//Create and set up the window.
JFrame frame = new JFrame("FrameDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel emptyLabel = new JLabel("");
emptyLabel.setPreferredSize(new Dimension(175, 100));
frame.getContentPane().add(emptyLabel, BorderLayout.CENTER);
//Display the window.
frame.pack();
frame.setVisible(true);
}
}
其中,编译的时候,说JFrame.setDefaultLookAndFeelDecorated(true);这行不认,请问哪里错了