1. Wednesday, October 3, 12

2. About Me
• Project lead of Kotlin
➡ at JetBrains since 2010
Andrey Breslav
• EG member of JSR-335
➡ Project Lambda
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3. Outline
• Where Kotlin comes from
• Where features come from
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4. Motivation
1995 2012
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5. Modern language
for Industry
Right Abstractions Safety Tool Support
Interoperability
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6. Expert
Users 6
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7. Change the
world!
Expert
Users 6
Wednesday, October 3, 12

8. Change the
world!
Expert
Users 6
Wednesday, October 3, 12

9. It's impossible!
Change the
world!
Expert
Users 6
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10. Incompetence
• Thinking out of the box
• Without knowing it
Great for requirements! Lamp
s
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11. Competence
Great for implementations
(if you have enough courage)
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12. – We hate writing stupid
constructors!..
– And getters/setters!..
– We want to use fields!..
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13. – Can't I just say 3.toString()?
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14. – String doesn't have enough
methods!..
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15. – One return value is too
restricting!..
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16. – List<String> contains objects,
doesn't it?!.
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17. Kotlin's Collections
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18. – Can you figure out those
nulls?!.
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19. – Doesn't it know that <TD>
must be inside a <TR>?!.
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20. – I could use it for the
browser, types and all...
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21. Kotlin Resources
• Docs: http://kotlin.jetbrains.org
• Demo: http://kotlin-demo.jetbrains.com
• Code: http://github.com/jetbrains/kotlin
• Twitter:
➡ @project_kotlin
➡ @abreslav
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Wednesday, October 3, 12