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Description
Java to Kotlinmargin: 4px 0px 14px; padding: 0px; font family: "Amazon Ember", Arial, sans serif; font size: 14px;'It takes a week to travel the 8,000 miles overland from Java to Kotlin. If you're an experienced Java developer who has tried the Kotlin language, you were probably productive in about the same time.'margin: 4px 0px 14px; padding: 0px; font family: "Amazon Ember", Arial, sans serif; font size: 14px;'You'll have found that they do things differently in
margin: -4px 0px 14px; padding: 0px; font-family: "Amazon Ember", Arial, sans-serif; font-size: 14px;'It takes a week to travel the 8,000 miles overland from Java to Kotlin. If you're an experienced Java developer who has tried the Kotlin language, you were probably productive in about the same time.'margin: -4px 0px 14px; padding: 0px; font-family: "Amazon Ember", Arial, sans-serif; font-size: 14px;'You'll have found that they do things differently in Kotlin, though. Nullability is important, collections are different, and classes are final default. Kotlin is more functional, but what does that mean, and how should it change the way that you program? And what about all that Java code that you still have to support? Your tour guides Duncan and Nat first made the trip in 2015, and they've since helped many teams and individuals follow in their footsteps. Travel with them as they break the route down into legs like Optional to Nullable, Beans to Values, and Open to Sealed Classes. Each explains a key concept and then shows how to refactor production Java to idiomatic Kotlin, gradually and safely, while maintaining interoperability.'margin: -4px 0px 0px; padding: 0px; font-family: "Amazon Ember", Arial, sans-serif; font-size: 14px;'The resulting code is simpler, more expressive, and easier to change. the end of the journey, you'll be confident in refactoring Java to Kotlin, writing Kotlin from scratch, and managing a mixed language codebase as it evolves over time.'margin: -4px 0px 0px; padding: 0px; font-family: "Amazon Ember", Arial, sans-serif; font-size: 14px;' style'box-sizing: border-box; padding: 0px 0px 4px; margin: 0px; text-rendering: optimizelegibility; font-weight: 700; font-size: 18px; line-height: 24px; color: rgb(15, 17, 17); font-family: "Amazon Ember", Arial, sans-serif;' About the Authorclass"a-section a-spacing-small a-padding-small" style'box-sizing: border-box; margin-bottom: 0px; color: rgb(15, 17, 17); font-family: "Amazon Ember", Arial, sans-serif; font-size: 14px; padding: 6px 10px !important;'"box-sizing: border-box; padding: 0px; margin: 0px;"Duncan McGregor & Nat Pryce and both started programming in Java before its 1.0 release, and have 55 years of combined experience on both the JVM and other platforms. Until they discovered Kotlin in 2015 Java was their language of choice for most applications.Shipping Notes
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4.8 ★★★★★
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Product Reviews
★★★★★ 5
Great oil
Size: 1 Quart, Style: 6-Pack, Configuration: Euro 5W-40
OEM for many European cars. Have utilized for years in my 2 Fiat Abarth's, great oil at a competitive price and if you change oil yourself you save quite a bit as compared to dealers or other shops. No breakdown even with the excessive heat the little 1.4L turbo puts out, great oil to rely on.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Meets Chrysler Mopar spec for Wrangler and Gladiator 3.0 diesel
Size: 1 Quart, Style: 6-Pack, Configuration: Euro 5W-40
Cheaper than Walmart and auto stores. Meets Chrysler spec and way cheaper than the Mopar oil the dealers want to sell for the 3.0 diesel in Jeeps. You’ll need 9 qts.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Works fine! I can not find this in my area
Size: 1 Quart, Style: 6-Pack, Configuration: Euro 5W-40
Nice high quality and just as advertised ! I would recommend for sure!
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Reviewed in the United States on April 30, 2026
★★★★★ 5
Great oil for 124 spider
Size: 1 Quart, Style: 6-Pack, Configuration: Euro 5W-40
I use Pennzoil Platinum Euro Full Synthetic 5W-40 in my Fiat 124 Spider, and it’s been great so far. The engine runs smooth and quiet, and cold starts feel solid. No issues with oil consumption, and it holds up well between changes.
The 6-pack of 1-quart bottles is convenient and makes it easy to measure out exactly what I need. Overall, it’s a quality synthetic oil at a good value. I’ll keep using it in my 124 Spider.
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Reviewed in the United States on February 28, 2026
★★★★★ 5
Ok for gas engines
Size: 1 Quart, Style: 1-Pack, Configuration: Euro 5W-40
Has latest API cert (SQ). Not with latest VW / Porsche / Mercedes diesel engine approvals.
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Reviewed in the United States on April 25, 2026
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