Java 判断用户名是否正确

Java 判断用户名是否正确(基础篇-实例066).zip

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.Jframe;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class CheckUsername extends Jframe {
    
    private JPanel contentPane;
    private JTextField usernameField;
    
    /**
     * Launch the application.
     */
    public static void main（String[] args） {
        EventQueue.invokeLater（new Runnable（） {
            public void run（） {
                try {
                    CheckUsername frame = new CheckUsername（）;
                    frame.setVisible（true）;
                } catch （Exception e） {
                    e.printStackTrace（）;
                }
            }
        }）;
    }
    
    /**
     * Create the frame.
     */
    public CheckU

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件         301  2010-07-14 15:33  .classpath
     文件         379  2010-09-07 13:19  .project
     文件         635  2010-07-14 15:33  .settings\org.eclipse.jdt.core.prefs
     文件         712  2013-11-21 08:40  bin\CheckUsername$1.class
     文件         662  2013-11-21 08:40  bin\CheckUsername$2.class
     文件         664  2013-11-21 08:40  bin\CheckUsername$3.class
     文件        2905  2013-11-21 08:40  bin\CheckUsername.class
     文件        3336  2010-07-14 19:00  src\CheckUsername.java