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.ParameterMetaData;
import java.sql.PreparedStatement;
import java.sql.Statement;

public class Main {
    public static void main(String[] args) throws Exception {
        Connection conn = getConnection();
        Statement st = conn.createStatement();

        st.executeUpdate("create table survey (id int,name varchar(30));");

        String sql = "INSERT INTO survey (id) VALUES(?)";
        PreparedStatement pstmt = conn.prepareStatement(sql);
        ParameterMetaData pmd = pstmt.getParameterMetaData();

        int totalDigits = pmd.getPrecision(1);
        int digitsAfterDecimal = pmd.getScale(1);
        boolean b = pmd.isSigned(1);
        System.out.println("The first parameter ");
        System.out.println("    has precision " + totalDigits);
        System.out.println("    has scale " + digitsAfterDecimal);
        System.out.println("    may be a signed number " + b);

        int count = pmd.getParameterCount();
        System.out.println("count is " + count);

        for (int i = 1; i <= count; i++) {
            int type = pmd.getParameterType(i);
            String typeName = pmd.getParameterTypeName(i);
            System.out.println("Parameter " + i + ":");
            System.out.println("    type is " + type);
            System.out.println("    type name is " + typeName);
        }

        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", "");
    }
}