前后密码输入一致，仍然提示密码前后不一致

Question

package frame;

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

public class SignUpFrame extends JFrame implements ActionListener {
    Box boxHOne,boxHTwo,boxVOne,boxVTwo,boxHThree;
    JTextField userName,passWord,rePassWord;
    JLabel name,psw,rePsw,tip;
    JButton signUp;
    public SignUpFrame(){
        setTitle("用户注册");
        setLayout(new FlowLayout());
        boxHOne=Box.createHorizontalBox();
        boxVOne=Box.createVerticalBox();
        boxVTwo=Box.createVerticalBox();
        boxHThree=Box.createHorizontalBox();
        name=new JLabel("用户名:");
        psw=new JLabel("密码");
        rePsw=new JLabel("确认密码");
        boxVOne.add(name);
        boxVOne.add(psw);
        boxVOne.add(rePsw);
        userName=new JTextField(15);
        passWord=new JTextField(15);
        rePassWord=new JTextField(15);
        boxVTwo.add(userName);
        boxVTwo.add(passWord);
        boxVTwo.add(rePassWord);
        boxHOne.add(boxVOne);
        boxHOne.add(Box.createHorizontalStrut(10));
        boxHOne.add(boxVTwo);
        tip=new JLabel("注意前后密码一致，否则将注册失败");
        tip.setFont(new Font("楷体",Font.PLAIN,16));
        tip.setForeground(Color.RED);
        signUp=new JButton("注册");
        signUp.addActionListener(this);
        boxHTwo=Box.createHorizontalBox();
        boxHTwo.add(signUp);
        boxHThree.add(tip);
        add(boxHOne);
        add(boxHTwo);
        add(boxHThree);
        setBounds(1100,500,320,250);
        setVisible(true);
        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    }
    public void actionPerformed(ActionEvent e){
        if(e.getSource()==signUp){
            if(passWord.getText()==rePassWord.getText()){
                dataCreate();
                new SignUpFrame();
            }
            else if(passWord.getText()!=rePassWord.getText()){
                tip.setText("前后两次密码输入不一致,请重新输入");
            }
        }
    }
    public void dataCreate(){
        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();
            sql.executeUpdate("insert into user value "+"('"+userName.getText()+"','"+passWord.getText()+"')");
            con.close();
        }catch (SQLException e){
        e.printStackTrace();
        }
    }
}

Answer 1

字符串比较不能用==，尝试把

passWord.getText()!=rePassWord.getText()

换成

!passWord.getText().equals(rePassWord.getText());