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Questions - jep

Lambda expressions and anonymous classes don't work when loaded as hidden classes

I am trying to compile and load dynamically generated Java code during runtime. Since both ClassLoader::defineClass and Unsafe::defineAnonymousClass have serious drawbacks in this scenario, I tried us...
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Duff

java

classloader

java-15

invokedynamic

jep

Votes: 0

Answers: 2

Latest Answer

You can not turn arbitrary classes into hidden classes. The documentation of defineHiddenClass contains the sentence On any attempt to resolve the entry in the run-time constant pool indicated by th...
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Holger

In what scenarios should I use JEP334 (JVM Constants API)

I'm learning Java 17, and with JEP334 (JVM Constants API), I know how to get ClassDesc, MethodTypeDesc, MethodHandleDesc, DynamicConstantDesc. But what can these objects do? In what application scenar...
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musan

java

java-17

jep

Votes: 0

Answers: 1

Latest Answer

This library is intended to to be used by low-level libraries, such as bytecode parsing and generation APIs like ASM, reflection libraries, etc. Most Java developers will not need to use this.
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Brian Goetz

Is there a JEP for Optional?

I like to learn about Java's features by taking a look at the corresponding JEP. Is there a JEP for Java's Optional? I wasn't able to find anything searching this list for Java 8 features.
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nistel

java

option-type

jep

Votes: 0

Answers: 1

Latest Answer

No, there is no separate JEP for Optional. The history of Optional is the following. The Java Specification Request 335 dealt with Lambda Expressions for the Java™ Programming Language. Its goal was: ...
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Pavel_K

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