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.ResultSetMetaData;
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_INSENSITIVE, ResultSet.CONCUR_UPDATABLE);

        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')");
        st = conn.createStatement();
        ResultSet rs = st.executeQuery("SELECT * FROM survey");

        ResultSetMetaData rsMetaData = rs.getMetaData();
        int numberOfColumns = rsMetaData.getColumnCount();

        // get the column names; column indexes start from 1
        for (int i = 1; i < numberOfColumns + 1; i++) {
            String columnName = rsMetaData.getColumnName(i);
            String tableName = rsMetaData.getTableName(i);
            System.out.println(columnName);
            System.out.println(tableName);
        }

        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", "");
    }
}