JAVA vs KOTLIN

The key difference between Java and Kotlin is given with details. Java is great and highly accepted across platforms, but its getting old.
Why is Kotlin taking so much preference and why should one prefer Kotlin? All the details are explained here.

Transcript

1. JAVA vs KOTLIN Which one to choose and Why? By Deesha Vora (@Deesharv, deesha@superwise.site) Co-founder and CPO @SuperWiseSite
2. I JAVA Because... Easy Object oriented Platform-independent Portable Distributed Robust 2
3. Because I know JAVA... 3 I JAVA Really
4. Why new language “Kotlin” ? - Concise yet expressive - Function Types - Kotlin doesn’t have checked exception - Collection filtering like Swift and Java 8 - Lazy Loading feature - Data class - lateinit, Delegates.notNull - Extension functions 4
6. Function types in Kotlin. Function accepting another function. fun <T> max(collection: Collection<T>, less: (T, T) -> Boolean): T? { var max: T? = null for (it in collection) if (max == null || less(max, it)) max = it return max } 6
7. Functional collection extensions JoinToString (fun <T> Iterable<T>.joinToString()) Creates a string from all the elements separated using separator and using the given prefixand postfix if supplied. Any (fun <T> Array<out T>.any(): Boolean) Returns true if array has at least one element. Associate (fun <T, K, V> Iterable<T>.associate( transform: (T) -> Pair<K, V>): Map<K, V>) Returns a Map containing key-value pairs provided by transform function applied to elements of the given collection. 7
8. lateinit, Delegates.notNull and lazy val movie: String var name: String? = null lateinit var name: String var age: Int by Delegates.notNull<Int>() val imm: InputMethodManager by lazy { getSystemService(INPUT_METHOD_SERVICE) as InputMethodManager } 8
9. Extension functions fun Activity.hideKeyboard(): Boolean { val view = currentFocus view ? .let { val inputMethodManager = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager return inputMethodManager.hideSoftInputFromWindow(view.windowToken, InputMethodManager.HIDE_NOT_ALWAYS) } return false } 9
10. JAVA CODE vs KOTLIN CODE public class User { private String firstName; private String lastName; public String getFirstName() {return firstName;} public void setFirstName(String firstName) {this.firstName = firstName;} public String getLastName() {return lastName;} public void setLastName(String lastName) {this.lastName = lastName;} } 10 class User { var firstName: String? = null var lastName: String? = null }
11. 40 % cut in the number of lines of code. 11
12. The Future, Kotlin/Native - Access to Objective C APIs - Kotline can be used for both iOS and Android - From server back-end to the web or mobile clients - LLVM compiler to generate machine code - (Supports Mac OSx 10+, Ubuntu 14+, iOS arm64, Raspberry Pi ) 12
14. https://goo.gl/2EFxmJ 14
15. Should I learn Kotlin from today ? How? If not now, Sooner or later you will have to. It is simple if you know JAVA already. 15 Should I switch my apps to Kotlin? That depends, how old and huge is your app. 6 months to 3 months? consider changing it to kotlin 1 year or older? then wait...You might want to consider interoperability of Kotlin. Or you might not want to do it at all.
16. Still confused…? 16 Shoot your queries... Catch me @Deesharv, Email:deesha@superwise.site