Question

求java问题解答，帮我看看这个程序哪里出错了呢？？？

import javax.swing.*;

public class FormatFrame2 extends JFrame{
String[] formats = {"Atom","Rss 0.92","Rss 1.0","Rss 2.0"};
JComboBox formatBox = new JComboBox(formats);

public FormatFrame2(){
super("Choose a Format");
setSize(220,150);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel pane =new JPanel();
JLabel formatLabel =new JLabel("Output formats:");
pane.add(formatLabel);
pane.add(formatBox);
add(pane);
setVisible(true);
}
private static void setLookAndFeel(){
try {
UIManager.setLookAndFeel(
"com.sun.java.swing.plaf.nimbus.NimbusLookAmdFeel"
) ;
}catch(Exception exc){
System.out.println(exc.getMessage());
}
}
}
public static void main (String[]arguments){
FormatFrame2.setLookAndFeel();
FormatFrame2 ff = new FormatFrame2();

}

Answer 1

  public static void main (String[]arguments){
          FormatFrame2 frame =new FormatFrame2();
           frame.setLookAndFeel();
}

看看

Answer 2

把你的main方法放到 类的括号里面去