プロジェクトでKotlinを導入した話

社内Kotlin勉強会でのLT資料を公開します！
サーバーサイドの Java プロジェクトの一部に Kotlin を導入した話！

Transcript

1. View Slide

2. View Slide

3. val text = """
   for (c in "foo")
   print(c)
   """
   

   View Slide

4. View Slide

5. View Slide

6. public interface UserMapper {
   @Select("select id, name, birthdate from users where id = #
   User select(int id);
   }
   

   View Slide

7. interface UserMapper {
   @Select("""
   select
   id,
   name,
   birthdate
   from
   users
   where
   id = #{id}
   """)
   fun select(id: Int): User
   }
   

   View Slide

8. View Slide

9. String jobj = "{" +
   "\"key1\": \"val1\"," +
   "\"key2\": [\"val2a\", \"val2b\"]" +
   "}";
   String jobj = "{\"key1\":\"val1\",\"key2\":[\"val2a\",\"val2b\"
   String jobj = new JSONObject()
   .put("key1", "val1")
   .put("key2", new JSONArray().put("val2a").put("val2b"
   .toString();
   

   View Slide

10. val jobj = """
    {
    "key1": "val1",
    "key2": ["val2a", "val2b"]
    }
    """
    

    View Slide

11. doReturn(false).when(domain).isSuccess();
    doReturn(false).`when`(domain).isSuccess
    

    View Slide

12. View Slide