我遇到了一个问题.我正在使用深红色的编辑器.有人可以解释这个错误的含义吗？
//这是我的节目
package test.rim.bbapps.testcase.lib;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class michaeltictactoe2 implements ActionListener {
/* Instance variables */
private JFrame window = new JFrame (" TicTacToe");
private JButton button1 = new JButton ("") ;
private JButton button2 = new JButton ("") ;
private JButton button3 = new JButton ("") ;
private JButton button4 = new JButton ("") ;
private JButton button5 = new JButton ("") ;
private JButton button6 = new JButton ("") ;
private JButton …