Command to look into files and search for a specific string

[CPE2012]

The following command is attempted to locate java files that contains string abc.

find *.java exec grep -il "abc"{} \ ;

Error message:
find: unknown predicate `-il'

[rrl]

edited for innacuracy

[atreyu]

find *.java exec grep -il "abc"{} \ ;

Error message:
find: unknown predicate `-il'

Try this:

find . -type f -iname '*.java' -exec grep -il "abc" {} \;

Note the spaces and leading dashes that you omitted in your example.