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");

        // Get cursor position
        int pos = rs.getRow(); // 0
        System.out.println(pos);
        boolean b = rs.isBeforeFirst(); // true
        System.out.println(b);

        // Move cursor to the first row
        rs.next();

        // Get cursor position
        pos = rs.getRow(); // 1
        b = rs.isFirst(); // true
        System.out.println(pos);
        System.out.println(b);

        // Move cursor to the last row
        rs.last();
        // Get cursor position
        pos = rs.getRow();
        System.out.println(pos);
        b = rs.isLast(); // true

        // Move cursor past last row
        rs.afterLast();

        // Get cursor position
        pos = rs.getRow();
        b = rs.isAfterLast(); // true

        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", "");
    }
}