Call PL/SQL from Java /OAF

OAF

import oracle.jdbc.OracleCallableStatement;
import oracle.sql.NUMBER;
import java.sql.*;
import java.sql.Connection;

OracleCallableStatement stmt = null;

            try {

                OADBTransaction trx = oaapplicationmodule.getOADBTransaction();
                String sqlStmt = "begin vpc_icms_cash_flow.p_create_new_version(?,?); end;";
                Connection connection = oaapplicationmodule.getOADBTransaction().getJdbcConnection();
                stmt = (OracleCallableStatement) connection.prepareCall(sqlStmt);

                stmt.setNUMBER(1, new NUMBER(contractId, 0)); // Bind 1st parameter
                stmt.setNUMBER(2, new NUMBER(contractVerNum, 0)); // Bind 2nd parameter

                stmt.execute();

            } catch (SQLException e) {

                if (flag) {
                    oapagecontext.writeDiagnostics(this, "VPC: Exception:" + e, 1);
                }
            } finally {
                try {
                    if (stmt != null) {
                        stmt.close(); // close the statement
                    }
                } catch (SQLException ex) {

                    if (flag) {
                        oapagecontext.writeDiagnostics(this, "VPC: Exception2:" + ex, 1);
                    }
                }
            }