drop all database tables oracle sql developer

1BEGIN
2   FOR cur_rec IN (SELECT object_name, object_type
3                   FROM user_objects
4                   WHERE object_type IN
5                             ('TABLE',
6                              'VIEW',
7                              'MATERIALIZED VIEW',
8                              'PACKAGE',
9                              'PROCEDURE',
10                              'FUNCTION',
11                              'SEQUENCE',
12                              'SYNONYM',
13                              'PACKAGE BODY'
14                             ))
15   LOOP
16      BEGIN
17         IF cur_rec.object_type = 'TABLE'
18         THEN
19            EXECUTE IMMEDIATE 'DROP '
20                              || cur_rec.object_type
21                              || ' "'
22                              || cur_rec.object_name
23                              || '" CASCADE CONSTRAINTS';
24         ELSE
25            EXECUTE IMMEDIATE 'DROP '
26                              || cur_rec.object_type
27                              || ' "'
28                              || cur_rec.object_name
29                              || '"';
30         END IF;
31      EXCEPTION
32         WHEN OTHERS
33         THEN
34            DBMS_OUTPUT.put_line ('FAILED: DROP '
35                                  || cur_rec.object_type
36                                  || ' "'
37                                  || cur_rec.object_name
38                                  || '"'
39                                 );
40      END;
41   END LOOP;
42   FOR cur_rec IN (SELECT * 
43                   FROM all_synonyms 
44                   WHERE table_owner IN (SELECT USER FROM dual))
45   LOOP
46      BEGIN
47         EXECUTE IMMEDIATE 'DROP PUBLIC SYNONYM ' || cur_rec.synonym_name;
48      END;
49   END LOOP;
50END;
51/
52