Performance Tuning :: Avoiding Bind Variable From Sql In Java Code?

We are on oracle 10.2.0.4 on Solaris 10 and have a perf. issue with a bind variable using query. The query is in java application. I want to test its performance when the query doesn't use bind variable and instead uses the passed value as literal. How can it be done?

As example lets say the query is:

SQL> variable vn varchar2(20);
SQL> EXEC :vn :='ADAMS';

PL/SQL procedure successfully completed.

SQL> select * from emp where ename=:vn;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7876 ADAMS CLERK 7788 12-JAN-83 1100 20

1 row selected.

SQL> EXEC :vn :='KING';

PL/SQL procedure successfully completed.

SQL> select * from emp where ename=:vn;

EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7839 KING PRESIDENT 17-NOV-81 5000 10

1 row selected.

But the statements will be taken as similar statements by oracle (due to :vn). Now I want oracle to take it as literal and the change for this has to be done in java code in my actual scenario which has a different query (but conceptually it uses bind variable and I want it to use passed value as literal). How can it be done?