Can I know why it doesn't give out the output for below code since there's no any error? - jdbc

Question

package labexercise2;
import java.sql.*;
public class LabExercise2
{
public static void main (String [] args) throws SQLException, ClassNotFoundException {
Class.forName("com.mysql.jdbc.Driver");
System.out.println ("Driver Loaded");
Connection connection= DriverManager.getConnection("jdbc:mysql://localhost/restaurant?"+ "user=root&password=");
System.out.println ("Database connected");
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery("SELECT MenuID, MenuName, Type, Cuisine FROM menu WHERE Price BETWEEN 7 AND 13");
while (rs.next()){
System.out.println(rs.getString("MenuID") + " : " +
rs.getString("MenuName") + " : " +
rs.getString("Type") + " : " +
rs.getString("Cuisine") + " : " +
rs.getString("Price")); }
connection.close();
}
}
Can I know why it doesn't give out the output for below code since there's no any error?
Any help will be appreciated

Answer 1

i think you missed port number in DriverManager.getConnection argument,it should be as following.
Connection connection= DriverManager.getConnection("jdbc:mysql://localhost:3306/restaurant?"+ "user=root&password=");

Answer 2

package labexercise2;
import java.sql.*;
public class LabExercise2
{
public static void main (String [] args) throws SQLException, ClassNotFoundException {
Class.forName("com.mysql.jdbc.Driver");
System.out.println ("Driver Loaded");
Connection conn= DriverManager.getConnection("jdbc:mysql://localhost:3306/restaurant?"+ "user=root&password=");
System.out.println ("Database connected");
Statement statement = conn.createStatement();
ResultSet rs = statement.executeQuery("SELECT * FROM menu WHERE Price BETWEEN 7.00 AND 13.00");
while (rs.next()){
System.out.println(rs.getString("MenuID") + " : " +
rs.getString("MenuName") + " : " +
rs.getString("Type") + " : " +
rs.getString("Cuisine") + " : " +
rs.getString("Price")); }
conn.close();
}
}

Answer 3

can you try following code instead connection.close();
if (statement != null) {
statement.close();
}
if (connection!= null) {
connection.close();
}

Answer 4

i have mocked and tested your code, it's working for me as explained below.
import java.sql.*;
public class LabExercise2 {
public static void main (String [] args) throws SQLException, ClassNotFoundException {
Class.forName("com.mysql.jdbc.Driver");
System.out.println ("Driver Loaded");
Connection connection= DriverManager.getConnection("jdbc:mysql://localhost/restaurant?"+ "user=root&password=root");
System.out.println ("Database connected");
Statement statement = connection.createStatement();
ResultSet rs = statement.executeQuery("SELECT * FROM menu WHERE Price BETWEEN 7 AND 13");
while (rs.next()){
System.out.println(rs.getString("MenuID") + " : " +
rs.getString("MenuName") + " : " +
rs.getString("Type") + " : " +
rs.getString("Cuisine") + " : " +
rs.getLong("Price")); }
connection.close();
}
}