Java Programming

i have a database table which stores the categories like this

Id    ParentId          Name
1     0                 catOne
2     0                 catTwo
3     1                 subCatOne
4     1                 subCatTwo
5     2                 subCatThree

the ones with parentId 0 are the root categories

and I have items table which is like

id      categoryId              name
1        3                        myName
2        4                        yourName

now I need to present a report like this

CatOne
  subCatOne
         myName
  subCatTwo
         yourName
CatTwo
  subCatThree

i tried recursive subreporting, but the recusion goes on endlessly..

ISNT THERE ANY THING LIKE

   IF (condition)
       INCLUDE THIS SUBREPORT
   ELSE
      EXIT;