uses reflection to get all the field names from java.sql.Types. : SQL Data Type Java Data Type « Database « Java Tutorial

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2. Database
3. SQL Data Type Java Data Type

import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.util.HashMap;
import java.util.Map;

public class Main {
  public static void main(String[] argv) throws Exception {
    String driverName = "com.jnetdirect.jsql.JSQLDriver";
    Class.forName(driverName);

    String serverName = "127.0.0.1";
    String portNumber = "1433";
    String mydatabase = serverName + ":" + portNumber;
    String url = "jdbc:JSQLConnect://" + mydatabase;
    String username = "username";
    String password = "password";

    Connection connection = DriverManager.getConnection(url, username, password);
    DatabaseMetaData dbmd = connection.getMetaData();
    ResultSet resultSet = dbmd.getTypeInfo();

    while (resultSet.next()) {
      // Get the database-specific type name
      String typeName = resultSet.getString("TYPE_NAME");

      // Get the java.sql.Types type to which this database-specific type is
      // mapped
      short dataType = resultSet.getShort("DATA_TYPE");
      getJdbcTypeName(dataType);
    }
  }

  public static void getJdbcTypeName(int jdbcType) {
    Map map = new HashMap();

    // Get all field in java.sql.Types
    Field[] fields = java.sql.Types.class.getFields();
    for (int i = 0; i < fields.length; i++) {
      try {
        String name = fields[i].getName();
        Integer value = (Integer) fields[i].get(null);
        map.put(value, name);
      } catch (IllegalAccessException e) {
      }
    }
    System.out.println(map);
  }

}