| Kotlin | Java |
| 1. It doesn't require too much work for data classes | 1. It requires to write and construct a lot of elements to develop classes |
| 2. Kotlin doesn't support implicit conversions | 2. Java supports implicit conversions |
| 3. There are no null variables or objects in Kotlin | 3. There are null variables or objects in java language |
| 4. Kotlin doesn't support static members | 4. Java supports static members |
| 5. It's quite easier to deploy Kotlin code | 5. It is hard to deploy Java code |
| 6. In Kotlin, Variables of a primitive type are objects | 6. In Java, Variables of a primitive type aren't objects |
| 7. Kotlin is both object-oriented and functional programming language | 7. Java is limited to object-oriented programming language |
| 8. In Kotlin, there are one or more secondary constructors | 8. In Java, there aren't secondary constructors |
| 9. Kotlin string template also supports expression | 9. Java string doesn't support expression |
| 10. Lazy-Loading feature is available in Kotlin. | 10. Lazy-Loading feature is not available in Java. |