Execute PL/SQL block with named binds from within java code?

Question

Hi guys,
Is there any good way to execute my PL/SQL code, for example
BEGIN         :x := :x+1; END;
from my Java code? I need nothing complicated, just static code block with named binds.
I have tried the Oracle exetnded JDBC (setXXXbyName methods):
  public static void main(String[] args){     try {     Class.forName("oracle.jdbc.driver.OracleConnection");     Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user","password"); String SQL="begin :x:=:x+1; end;"; OracleCallableStatement stmt; stmt=(OracleCallableStatement)conn.prepareCall(SQL); stmt.setIntAtName("x", 5); stmt.registerOutParameter("x", Types.INTEGER); stmt.execute(); System.out.println(stmt.getInt("x"));     } catch (Exception x) { x.printStackTrace();    }   }
And get the java.sql.SQLException: operation not allowed: Ordinal binding and Named binding cannot be combined!
Then i've tried SQLJ appoach:
  public static void main(String[] args){     try {     Class.forName("oracle.jdbc.driver.OracleConnection");     Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user","password");       Oracle.connect(conn);       System.out.println("Connected!");           int x=3;       #sql { BEGIN         :x := :x+1;       END; };           System.out.println("x=" + x);     } catch (Exception x) { x.printStackTrace();    }   }
And x=3 had retuned... Although 4 expected.
Then, I've set parameter sqlj.bind-by-identifier=true
And result is another exception! java.sql.SQLException: Missing IN or OUT parameter at index:: 2
Can you please mark my mistakes/point to correct solution?
Thanks in advance,
Alexey

Answer 1

Found another solution, this time working at least...
  public void testPLSQL() {
       String dynamicSQL=
            "declare\n" +
            "  v_CursorID  INTEGER;\n" +
            "  v_BlockStr  VARCHAR2(500);\n" +
            "  v_Dummy     INTEGER;\n" +
            "  v_x         String(18);\n" +
            "BEGIN\n" +
            "  v_CursorID := DBMS_SQL.OPEN_CURSOR;\n" +
            "  v_BlockStr :=?;" +
            "  DBMS_SQL.PARSE(v_CursorID, v_BlockStr, DBMS_SQL.V7);\n" +
            "  v_x:=?;"+
            "  DBMS_SQL.BIND_VARIABLE(v_CursorID, ':x', v_x,18);\n" +
            "  v_Dummy := DBMS_SQL.EXECUTE(v_CursorID);\n" +
            "  DBMS_SQL.VARIABLE_VALUE(v_CursorID, ':x', v_x);\n" +
            "  DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
            "  ?:=v_x;"+
            "  COMMIT;\n" +
            "EXCEPTION\n" +
            "  WHEN OTHERS THEN\n" +
            "    DBMS_SQL.CLOSE_CURSOR(v_CursorID);\n" +
            "    RAISE;\n" +
            "END DynamicPLSQL;";
         try {
               Class.forName("oracle.jdbc.driver.OracleConnection");
               Connection conn=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","user", "password");
               System.out.println("Profit");
     String SQL="begin :x:=:x+1; end;";
     OracleCallableStatement stmt;
     stmt=(OracleCallableStatement)conn.prepareCall(dynamicSQL);
     stmt.setString(1, SQL);
     int x=3;
     stmt.setInt(2, x);
     stmt.registerOutParameter(3,     Types.INTEGER);
     stmt.execute();
     x=stmt.getInt(3);
     System.out.println(x);
     assertEquals(4, x);
         } catch (Exception ex) {
              ex.printStackTrace();
              assertTrue(false);
  }Now the only thing I need is to code some kind of preprocessor of SQL block, to prepare the dynamicSQL lair for SQL critter...
Please please please show me something less complicated! :8}