Java Implements Hotel Room Management System

This example shares the specific code of Java to implement the hotel room management system for your reference, which is as follows

LoginFrame.java

package loginManage;

import java.awt.Color;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.ResultSet;
import com.swtdesigner.SwingResourceManager;

import db.JDBC;
public class LoginFrame {

 private JLabel label;
 private JButton button;
 private JButton btnregister;
 private JButton btnreset;
 private JButton btnlogin;
 private JLabel labpwd;
 private JLabel labUserName;
 private JPasswordField textpwd;
 private JTextField textUsername;
 public JFrame frame;

 
 public static void main(String args[]) {
 EventQueue.invokeLater(new Runnable() {
  public void run() {
  try {
   LoginFrame window = new LoginFrame();
   
   window.frame.setVisible(true);
  } catch (Exception e) {
   e.printStackTrace();
  }
  }
 });
 }

 
 public LoginFrame() {
 createContents();
 }

 
 private void createContents() {
 frame = new JFrame();
 frame.setTitle(" Sign in ");
 frame.getContentPane().setFocusCycleRoot(true);
 frame.getContentPane().setBackground(Color.LIGHT_GRAY);
 frame.getContentPane().setLayout(null);
 frame.setBounds(400, 150, 490, 375);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 btnlogin = new JButton();
 btnlogin.addActionListener(new ActionListener() {
  public void actionPerformed(final ActionEvent arg0) {
  String name = textUsername.getText().trim();
  String password = textpwd.getText().trim();
  Connection conn = null;
  PreparedStatement pstmt=null;
  ResultSet rs=null;
  int flag=0;
  if(name.equals("")||password.equals("")){
   flag=2;
  }
  int right=0;
  try {
   String sql = "select * from login where userName=?";
    conn = (Connection)JDBC.getConnection();
    pstmt= (PreparedStatement)conn.prepareStatement(sql);
    pstmt.setString(1, name);
    rs=(ResultSet) pstmt.executeQuery();
    while(rs.next()){
     String userName=rs.getString("userName");
     String passWord=rs.getString("passWord");
     right=rs.getInt("admin");
     if(userName.equals(name)&&passWord.equals(password)){
     flag = 1;
     }
    }
    switch(flag){
     case 1:
     if((right==1)){
       BackRun admin = new BackRun();
       admin.frame.setVisible(true);
       frame.setVisible(false);
       break;
      }else{
       FrontRun admin= new FrontRun();
       admin.frame.setVisible(true);
       frame.setVisible(false);
       break;
     }
     case 2:
    JOptionPane.showMessageDialog(btnlogin ," User name or password cannot be empty , Please re-enter! ");
       break;
     default: 
       JOptionPane.showMessageDialog(btnlogin ," User name or password   Incorrect , Please re-enter! ");
       break;

     }
     
     
     
    } catch (Exception e) {
   e.printStackTrace();
   }
    
   
   
  
  }
 });
 
  
  
 btnlogin.setText("  Land ");
 btnlogin.setBounds(75, 215, 83, 28);
 frame.getContentPane().add(btnlogin);

 btnreset = new JButton();
 btnreset.addActionListener(new ActionListener() {
  public void actionPerformed(final ActionEvent arg0) {
  textUsername.setText("");
  textpwd.setText("");
  
  }
 });
 btnreset.setText(" Reset ");
 btnreset.setBounds(195, 215, 83, 28);
 frame.getContentPane().add(btnreset);

 labUserName = new JLabel();
 labUserName.setText(" User name: ");
 labUserName.setBounds(75, 130, 52, 18);
 frame.getContentPane().add(labUserName);

 labpwd = new JLabel();
 labpwd.setText(" dense    Code: ");
 labpwd.setBounds(75, 175, 66, 18);
 frame.getContentPane().add(labpwd);

 textUsername = new JTextField();
 textUsername.setBounds(145, 130, 188, 22);
 frame.getContentPane().add(textUsername);

 textpwd = new JPasswordField();
 textpwd.setBounds(145, 170, 188, 22);
 frame.getContentPane().add(textpwd);

 btnregister = new JButton();
 btnregister.addActionListener(new ActionListener() {
  public void actionPerformed(final ActionEvent arg0) {
  Register rs = new Register();
  rs.frame.setVisible(true);
  }
 });
 btnregister.setText(" register ");
 btnregister.setBounds(270, 270, 81, 28);
 frame.getContentPane().add(btnregister);

 button = new JButton();
 button.addActionListener(new ActionListener() {
  public void actionPerformed(final ActionEvent arg0) {
  System.exit(0);
  }
 });
 button.setText(" Sign out ");
 button.setBounds(310, 215, 83, 28);
 frame.getContentPane().add(button);

 label = new JLabel();
 label.setText(" No account yet?Click Register now !");
 label.setBounds(85, 275, 181, 33);
 frame.getContentPane().add(label);

} 
}

Register.java

package loginManage;

import java.awt.Color;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;

import com.mysql.jdbc.PreparedStatement;
import com.swtdesigner.SwingResourceManager;
public class Register {
 private JButton button;
 private JButton btnregister;
 private JLabel labpwd;
 private JLabel labUserName;
 private JPasswordField textpwd;
 private JTextField textUsername;
 public JFrame frame;
  public boolean flag=false; 
 
 public static void main(String args[]) {
 EventQueue.invokeLater(new Runnable() {
  public void run() {
  try {
   Register window = new Register();
   
   window.frame.setVisible(true);
  } catch (Exception e) {
   e.printStackTrace();
  }
  }
 });
 }

 
 public Register() {
 createContents();
 }

 
 private void createContents() {
 
 
 frame = new JFrame();
 frame.getContentPane().setFocusCycleRoot(true);
 frame.getContentPane().setBackground(Color.LIGHT_GRAY);
 frame.getContentPane().setLayout(null);
 frame.setBounds(350, 150, 500, 375);
 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 labUserName = new JLabel();
 labUserName.setText(" User name: ");
 labUserName.setBounds(109, 182, 52, 18);
 frame.getContentPane().add(labUserName);

 labpwd = new JLabel();
 labpwd.setText(" dense    Code: ");
 labpwd.setBounds(109, 224, 66, 18);
 frame.getContentPane().add(labpwd);

 textUsername = new JTextField();
 textUsername.setBounds(190, 180, 188, 22);
 frame.getContentPane().add(textUsername);

 textpwd = new JPasswordField();
 textpwd.setBounds(190, 222, 188, 22);
 frame.getContentPane().add(textpwd);

 btnregister = new JButton();
 btnregister.addActionListener(new ActionListener() {
  @SuppressWarnings("deprecation")
  public void actionPerformed(final ActionEvent arg0) {

  PreparedStatement st=null;
  Connection con =null;
  String sqlStr="insert into login(userName,passWord) values(?,?)";
  try {
   Class.forName("com.mysql.jdbc.Driver");
  } catch (ClassNotFoundException e1) {
   e1.printStackTrace();
  }
  try {
   con = DriverManager.getConnection("jdbc:mysql://localhost:3306/hotel","root","125800");
   st = (PreparedStatement) con.prepareStatement(sqlStr);

  } catch (SQLException e1) {
   e1.printStackTrace();
  }
  
  String name = textUsername.getText().trim();
  String password = textpwd.getText().trim(); 
  if(name.equals("")||password.equals("")){
   JOptionPane.showMessageDialog(btnregister ," User name or password cannot be empty , Please re-enter! ");

  }else{
  try {
   st.setString(1,name);
   st.setString(2,password);
   st.execute();
   flag=true;
   if(flag){
   JOptionPane.showMessageDialog(btnregister, " login was successful \n Point OK Return to Login Interface ");
   LoginFrame backMain=new LoginFrame();
   backMain.frame.setVisible(true);
   frame.setVisible(false);
   }else{
   JOptionPane.showMessageDialog(btnregister, " login has failed \n Point OK Return to Login Interface ");
   }
  } catch (SQLException e) {
   e.printStackTrace();
  }
  }
//   JOptionPane.showMessageDialog(btnregister, " login was successful \n Point OK Return to Login Interface ");
//   loginFrame backMain=new loginFrame();
//   backMain.frame.setVisible(true);
//   frame.setVisible(false);

    try {
   st.close();
   con.close();

  } catch (SQLException e1) {
   e1.printStackTrace();
  }
     

  }
 });
 btnregister.setText(" Submit ");
 btnregister.setBounds(162, 268, 95, 28);
 frame.getContentPane().add(btnregister);

 button = new JButton();
 button.addActionListener(new ActionListener() {
  public void actionPerformed(final ActionEvent arg0) {
    frame.setVisible(false);

  }
 });
 button.setText(" Return ");
 button.setBounds(283, 268, 95, 28);
 frame.getContentPane().add(button);

 final JLabel label = new JLabel();
 label.setIcon(SwingResourceManager.getIcon(Register.class, "/648.gif"));
 label.setBounds(0, 0, 492, 341);
 frame.getContentPane().add(label);
// frame.getContentPane().setFocusTraversalPolicy(new FocusTraversalOnArray(new Component[] {labUserName, labpwd, btnregister, textUsername, textpwd, button}));

 }


}

Complete code: Java implements hotel room management system