import java.sql.*;
import java.io.FileInputStream;
import java.util.Properties;
class jdbcSelect {
 public static void main (String args [])
    throws Exception {
 DriverManager.registerDriver(new
         oracle.jdbc.driver.OracleDriver());
 Properties props = new Properties();
 props.load(new FileInputStream("conn.props"));
 Connection conn = DriverManager
     .getConnection(props.getProperty("url"), props);
 Statement stmt = conn.createStatement();
 ResultSet rset =
   stmt.executeQuery("SELECT * FROM " + args[0]);
 ResultSetMetaData rsetmetadata = rset.getMetaData();
 int numCols = rsetmetadata.getColumnCount();
 while (rset.next()) {
  for(int i=1; i<=numCols; i++) {
     String value = rset.getString(i);
     if (rset.wasNull()) System.out.print("null");
        else System.out.print(value);
     System.out.print("  ");
  }
  System.out.println();
 }
 rset.close(); stmt.close(); conn.close();
}}