输入错误的用户名和密码没反应，正确的用户名和密码可以成功运行

package frame;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.*;

public class LoginFrame extends JFrame implements ActionListener {
    JTextField userName,passWord;
    JLabel name,psw,tip;
    Box boxHOne,boxHTwo,boxVOne,boxVTwo;
    JButton logIn,signUp;
    public LoginFrame(){
        setTitle("推箱子");
        setLayout(new FlowLayout());
        boxHOne=Box.createHorizontalBox();
        boxVOne=Box.createVerticalBox();
        boxVTwo=Box.createVerticalBox();
        name=new JLabel("用户名:");
        psw=new JLabel("密码");
        boxVOne.add(name);
        boxVOne.add(psw);
        userName=new JTextField(15);
        passWord=new JTextField(15);
        boxVTwo.add(userName);
        boxVTwo.add(passWord);
        boxHOne.add(boxVOne);
        boxHOne.add(Box.createHorizontalStrut(10));
        boxHOne.add(boxVTwo);
        logIn=new JButton("登录");
        logIn.addActionListener(this);
        logIn.setFocusable(true);
        signUp=new JButton("注册");
        signUp.addActionListener(this);
        boxHTwo=Box.createHorizontalBox();
        boxHTwo.add(logIn);
        boxHTwo.add(signUp);
        add(boxHOne);
        add(boxHTwo);
        setBounds(1100,500,320,200);
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==logIn)
            dataQuery();
        else if(e.getSource()==signUp)
            new SignUpFrame();
    }
    public void dataQuery(){
        Connection con;
        Statement sql;
        ResultSet rs;
        try{
            Class.forName("com.mysql.jdbc.Driver");
        }catch (Exception e){
            e.printStackTrace();
        }
        try{
            String uri="jdbc:mysql://localhost:3306/pushbox?useUnicode=true&characterEncoding=utf8&&useSSL=false";
            String user="root";
            String password="123456";
            con= DriverManager.getConnection(uri,user,password);
            sql=con.createStatement();
            String pasw1=null,pasw=null,uName=null;
            do{
                uName=userName.getText();
                rs=sql.executeQuery("SELECT username,password FROM user WHERE username='"+uName+"'");
                pasw=passWord.getText();
                rs.last();
                if(rs.getRow()==0){
                    tip=new JLabel("用户名不存在");
                    add(tip);
                    userName.setText("");
                    passWord.setText("");
                }
                else {
                    pasw1=rs.getString("password");
                    if(pasw.equals(pasw1)){
                        new MainFrame();
                        break;
                    }
                    else{
                        tip=new JLabel("密码错误");
                        add(tip);
                    }
                }
            }while(rs.getRow()==0||!pasw.equals(pasw1));
            con.close();
        }catch (SQLException e){
            e.printStackTrace();
        }
    }
    public static void main(String args[]){
        new LoginFrame();
    }
}

输入错误的用户名和密码没反应，而且窗口关也关不上，正确的用户名和密码可以成功运行，