How to connect oracle database from java

import java.sql.*;

import javax.swing.JOptionPane;

public class ConnectionClass
{
    public static Connection dbconnect()
    {
        try {
            Class.forName("oracle.jdbc.OracleDriver");
            Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","schoolms","schoolms");
            return conn;
        } catch (Exception e) {
            // TODO: handle exception
            JOptionPane.showMessageDialog(null, e);
            return null;
        }
    }
}