amitshekhariitbhu / from-java-to-kotlin Goto Github PK

add a future example from java to kotlin
public Future ...

Under Logical operators you have used Bitwise operators in Java

Java
public class Utils {

    private Utils() { 
      // This utility class is not publicly instantiable 
    }
    
    public static int triple(int value) {
        return 3 * value;
    }
    
}

int result = Utils.triple(3);
Kotlin
fun Int.triple(): Int {
  return this * 3
}

var result = 3.triple()

var result = 3.triple() is it same function as in Java called Utils.triple(3) ?
If yes than 3 how can be an object ?

enum class Direction constructor(direction: Int) {
    NORTH(1),
    SOUTH(2),
    WEST(3),
    EAST(4);

    var direction: Int = 0
        private set

    init {
        this.direction = direction
    }
}

could be

enum class Direction(val direction: Int) {
    NORTH(1),
    SOUTH(2),
    WEST(3),
    EAST(4);
}

Please add commons patterns, thanks 🙏

Would it be possible to consider adding Java code decompiled from Kotlin for each example? This would make it more intuitive to see the differences between the two.

An example is as follows：

Print to Console

Java

System.out.print("Amit Shekhar");
System.out.println("Amit Shekhar");

Kotlin

print("Amit Shekhar")
println("Amit Shekhar")

Java(Decompiled from the above Kotlin code)

System.out.print((Object) "Amit Shekhar");
System.out.println((Object) "Amit Shekhar");

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In this java to kotlin comparison

Java

if(object instanceof Car){
}
Car car = (Car) object;

Kotlin

if (object is Car) {
}
var car = object as Car

Shouldn't the casting be inside the braces, i.e

Java

if(object instanceof Car){
    Car car = (Car) object;
}

Kotlin

if (object is Car) {
    var car = object as Car
}

show usage of lateinit like:-
FirebaseDatabase database; (java)
internal lateinit var database: FirebaseDatabase (kotlin)

Hi, this is more of a request & not an issue. Would it be possible to rule-out case sensitivity on "Kotlin"?
thanks in adv.

   var otherName : String?
   otherName = null

It should be like this if I'm not wrong ?

  var otherName : String? = null