How to Get ResultSet Metadata

package example.jdbc.resultsetmetadata;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
 
public class Main1 {
    public static void main(String[] args) throws Exception {
	Connection conn = getMySqlConnection();
	System.out.println("Got Connection.");
	Statement st = conn.createStatement();
	st.executeUpdate("drop table survey;");
	st.executeUpdate("create table survey (id int,name varchar(30));");
	st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
 
	st = conn.createStatement();
	ResultSet rs = st.executeQuery("SELECT * FROM survey");
 
	ResultSetMetaData rsMetaData = rs.getMetaData();
 
	int numberOfColumns = rsMetaData.getColumnCount();
	System.out.println("resultSet MetaData column Count=" + numberOfColumns);
 
	for (int i = 1; i <= numberOfColumns; i++) {
	    System.out.println("column MetaData ");
	    System.out.println("column number " + i);
	    // indicates the designated column's normal maximum width in
	    // characters
	    System.out.println(rsMetaData.getColumnDisplaySize(i));
	    // gets the designated column's suggested title
	    // for use in printouts and displays.
	    System.out.println(rsMetaData.getColumnLabel(i));
	    // get the designated column's name.
	    System.out.println(rsMetaData.getColumnName(i));
 
	    // get the designated column's SQL type.
	    System.out.println(rsMetaData.getColumnType(i));
 
	    // get the designated column's SQL type name.
	    System.out.println(rsMetaData.getColumnTypeName(i));
 
	    // get the designated column's class name.
	    System.out.println(rsMetaData.getColumnClassName(i));
 
	    // get the designated column's table name.
	    System.out.println(rsMetaData.getTableName(i));
 
	    // get the designated column's number of decimal digits.
	    System.out.println(rsMetaData.getPrecision(i));
 
	    // gets the designated column's number of
	    // digits to right of the decimal point.
	    System.out.println(rsMetaData.getScale(i));
 
	    // indicates whether the designated column is
	    // automatically numbered, thus read-only.
	    System.out.println(rsMetaData.isAutoIncrement(i));
 
	    // indicates whether the designated column is a cash value.
	    System.out.println(rsMetaData.isCurrency(i));
 
	    // indicates whether a write on the designated
	    // column will succeed.
	    System.out.println(rsMetaData.isWritable(i));
 
	    // indicates whether a write on the designated
	    // column will definitely succeed.
	    System.out.println(rsMetaData.isDefinitelyWritable(i));
 
	    // indicates the nullability of values
	    // in the designated column.
	    System.out.println(rsMetaData.isNullable(i));
 
	    // Indicates whether the designated column
	    // is definitely not writable.
	    System.out.println(rsMetaData.isReadOnly(i));
 
	    // Indicates whether a column's case matters
	    // in the designated column.
	    System.out.println(rsMetaData.isCaseSensitive(i));
 
	    // Indicates whether a column's case matters
	    // in the designated column.
	    System.out.println(rsMetaData.isSearchable(i));
 
	    // indicates whether values in the designated
	    // column are signed numbers.
	    System.out.println(rsMetaData.isSigned(i));
 
	    // Gets the designated column's table's catalog name.
	    System.out.println(rsMetaData.getCatalogName(i));
 
	    // Gets the designated column's table's schema name.
	    System.out.println(rsMetaData.getSchemaName(i));
	}
 
	st.close();
	conn.close();
    }
 
    private static Connection getHSQLConnection() throws Exception {
	Class.forName("org.hsqldb.jdbcDriver");
	System.out.println("Driver Loaded.");
	String url = "jdbc:hsqldb:data/tutorial";
	return DriverManager.getConnection(url, "sa", "");
    }
 
    public static Connection getMySqlConnection() throws Exception {
	String driver = "org.gjt.mm.mysql.Driver";
	String url = "jdbc:mysql://localhost/demo2s";
	String username = "oost";
	String password = "oost";
 
	Class.forName(driver);
	Connection conn = DriverManager.getConnection(url, username, password);
	return conn;
    }
 
    public static Connection getOracleConnection() throws Exception {
	String driver = "oracle.jdbc.driver.OracleDriver";
	String url = "jdbc:oracle:thin:@localhost:1521:caspian";
	String username = "mp";
	String password = "mp2";
 
	Class.forName(driver); // load Oracle driver
	Connection conn = DriverManager.getConnection(url, username, password);
	return conn;
    }
}