Main.java Source code

Introduction

Here is the source code for Main.java

Source

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 {
        Connection conn = getConnection();
        Statement st = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_READ_ONLY);

        st.executeUpdate("create table survey (id int,name varchar(30));");
        st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
        st.executeUpdate("insert into survey (id,name ) values (2,null)");
        st.executeUpdate("insert into survey (id,name ) values (3,'Tom')");
        ResultSet rs = st.executeQuery("SELECT * FROM survey");

        // move to the end of the result set
        rs.last();

        // get the row number of the last row, which is also the row count
        int rowCount = rs.getRow();
        System.out.println(rowCount);

        // now you may move the cursor to the front of this ResultSet object,
        // just before the first row
        rs.beforeFirst();

        rs.close();
        st.close();
        conn.close();
    }

    private static Connection getConnection() throws Exception {
        Class.forName("org.hsqldb.jdbcDriver");
        String url = "jdbc:hsqldb:mem:data/tutorial";

        return DriverManager.getConnection(url, "sa", "");
    }
}