Who-are-the-top-Java-experts-in-the-world

https://www.quora.com/Who-are-the-top-Java-experts-in-the-world

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• Brian Goetz, currently the Java Language Architect at Oracle, long-term writer on concurrency.
• Doug Lea, creator of

  java.util.concurrent

  based on earlier libraries.
• Rod Johnson - creator of Spring Framework (just recenly joined Quora, welcome!)

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Good list so far, I'd add:

• (Current JVM architect) John Rose: John Rose | Java.net John Rose @ Oracle
• (Mr. HotSpot) Dr. Cliff Click Hacking {Code, Math, Machines, Life}

• (JVM performance) Charlie Hunt Tweets with replies by Charlie Hunt (@charlesjhunt)

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I am surprised no one mentioned him so far.

Mr. James Gosling

He created the original design of Java and implemented the language's original compiler and virtual machine in 1994 at Sun Microsystems.

He is also referred to as "The father of Java".

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1. Joshua Bloch should be one of them, if not the best. He wrote the java collections framework and the java.math package. Author of best selling guide on writing effective java :)
2. Martin Ordersky, author of current java compiler. Creator of the scala language.
3. Doug Cutting, author of Lucene, Nutch(co-author), and Hadoop. Apache guy :)
4. Doug Lea, added efficient concurrent collections to java.util. Best selling author on java concurrency practices.

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1. Gavin King
2. Rod Johnson
3. James Strachan
   
4. Ben Christensen
   
5. Tim Fox