Debug or Run SP in Oracle

Oracle SP
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CREATE OR REPLACE PROCEDURE RPT_MFS_Revised_Journal (
   P_JOURNAL_DATE   IN     DATE := NULL,
   cur_OUT          IN OUT SYS_REFCURSOR)
AS
BEGIN
   OPEN cur_out FOR
        SELECT TO_CHAR (TransactionDate, 'DD/MM/YYYY') AS TransactionDate,
               TXCODE,              
          FROM T_Activity,            
         WHERE ( (T_Activity.IsRollBack = 0)
                OR (T_Activity.IsRollBack = 1                
      ORDER BY T_Activity.TxID;
END;
/
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Suppose
SP Name: RPT_MFS_Revised_Journal
Parameters:
P_JOURNAL_DATE   : '10/25/2014'


To Debug SP Write Following Code
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BEGIN
RPT_MFS_Revised_Journal (
   :P_JOURNAL_DATE,
   :cur_OUT);
END;
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Select code and click [Execute statement] from left side {blue play button}
A Variables window popup. Select date type for [P_JOURNAL_DATE] and input date('10/25/2014') and null for [cur_OUT]
Then click OK.

If Everything ok, then you got actual result.