Kotlin fixes some of the Java issues.

• Null references are controlled by the type system.

• No raw types

• Arrays in Kotlin are invariant

• Kotlin has proper function types, as opposed to Java’s SAM-conversions

• Use-site variance without wildcards

• Kotlin does not have checked exceptions

Java has below that kotlin does not have

• Checked exceptions

• Primitive types that are not classes

• Static members

• Non-private fields

• Wildcard-types

• Ternary-operator a ? b : c

What Kotlin has that Java does not

• Lambda expressions + Inline functions

• Extension functions

• Null-safety

• Smart casts

• String templates

• Properties

• Primary constructors

• First-class delegation

• Type inference for variable and property types

• Singletons

• Declaration-site variance & Type projections

• Range expressions

• Operator overloading

• Companion objects

• Data classes

• Separate interfaces for read-only and mutable collections

• Coroutines

Mansi Vaghela LinkedIn Twitter Github Youtube