java 导入包 未使用_java导入的包无法使用

代码如下：importjavax.swing.JButton;importjavax.swing.JFrame;importjavax.swing.JOptionPane;importjavax.swing.JPanel;importjavax.swing.JTextField;importjavax.swing.text.Vi...

代码如下：

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JTextField;

import javax.swing.text.View;

import org.omg.CORBA.PUBLIC_MEMBER;

import com.sun.java.swing.plaf.windows.resources.windows;

import sun.awt.WindowClosingListener;

import sun.security.jgss.LoginConfigImpl;

public class MAIN

{

String usertext,passwordtext;

TextField user,password;

JFrame frame = new JFrame();

JPanel panel = new JPanel();

JButton button1=new JButton("登陆");

JButton button2=new JButton("重置");

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