import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class Main {
  public static void main(String[] args) throws Exception {
    String url = "jdbc:mysql://192.168.100.100:3306/";
    String dbName = "databaseName";
    Statement stmt = null;
    ResultSet result = null;
    String driver = "com.mysql.jdbc.Driver";
    String databaseUserName = "admin";
    String databasePassword = "root";
    Class.forName(driver).newInstance();
    Connection conn = DriverManager.getConnection(url + dbName, databaseUserName,
        databasePassword);
    stmt = conn.createStatement();
    result = null;
    String password, username;
    result = stmt
        .executeQuery("select * from userTable where username ='user1' ");
    if (!result.isBeforeFirst()) {
      System.out.println("resultset contin no rows");
    }
    while (result.next()) {
      username = result.getString("username");
      password = result.getString("password");
      System.out.println(username + "  " + password);
    }
    conn.close();
  }
}