How are Java lambda functions compiled

0 votes
Mar 6, 2019 in Cloud Computing by Phalguni
• 1,020 points

1 answer to this question.

0 votes

For Lambda expressions, the compiler doesn’t translate them into something which is already understood by JVM. Lambda syntax that is written by the developer is desugared into JVM level instructions generated during compilation, which means the actual responsibility of constructing lambda is deferred to runtime.

To make Java less compile time strictly, and allow JVM languages to bind code at runtime, a new invokedynamic bytecode instruction to the JVM and a new java.lang.invoke API package is introduced.

Java can add functional programming constructs. Instead of generating direct bytecode for lambda compiler declares some instructions and delegates the real construction approach to runtime.

So, during the compilation process following information is generated:

  • The bootstrap method information is needed for JVM to construct object representation of lambda during runtime
  • Lambda body code is generated within an instance or static private method which has the same parameters and return type as lambda’s functional interface abstract method
  • The functional interface is added to the invokeDynamic instructions

During runtime, when JVM encounters invokedynamic instruction or recipe it makes a bootstrap call and this is one time only call which is necessary for lambda object construction during runtime

answered Mar 6, 2019 by Avantika
• 1,520 points

Related Questions In Cloud Computing

0 votes
1 answer

Can we scale Lambda functions for SNS trigger?

This doc should answer your first concern: ...READ MORE

answered Apr 20, 2018 in Cloud Computing by hemant
• 5,790 points
0 votes
1 answer

What are the limitations of AWS lambda?

You can get a brief knowledge about ...READ MORE

answered Aug 9, 2018 in Cloud Computing by Priyaj
• 58,090 points
0 votes
1 answer

What are AWS Step Functions?

AWS Step Functions lets you coordinate multiple ...READ MORE

answered Aug 23, 2018 in Cloud Computing by code_ninja
• 6,290 points
0 votes
2 answers
0 votes
1 answer

How does AWS Lambda work?

AWS Lambda is  an Amazon service which ...READ MORE

answered Jul 11, 2019 in Cloud Computing by ArchanaNagur
• 2,360 points
+1 vote
1 answer

How to issue a parsing json from case class using jackson?

Do you use jackson-module-scala or any other Scala-aware configuration ...READ MORE

answered Sep 26, 2018 in AWS by Priyaj
• 58,090 points
0 votes
1 answer

Serializing a lambda

With the release of Java 8, Oracle introduced the ...READ MORE

answered Nov 16, 2018 in Java by code.reaper12
• 3,500 points
0 votes
0 answers

Java snapstart is not available in AWS Lambda

I have started to write Java Lambdas ...READ MORE

Jan 3, 2023 in AWS by Tejashwini
• 3,820 points
+5 votes
4 answers

How to execute a python file with few arguments in java?

You can use Java Runtime.exec() to run python script, ...READ MORE

answered Mar 27, 2018 in Java by DragonLord999
• 8,450 points

edited Nov 7, 2018 by Omkar 80,075 views
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP