Class LazyConstantsSecondPreviewExamples

java.lang.Object

net.jrodolfo.java_evolution.java26.lazy_constants.LazyConstantsSecondPreviewExamples

public class LazyConstantsSecondPreviewExamples
extends Object

Demonstrates the second preview of Lazy Constants from JEP 526.

The preview API is exercised in an isolated child JVM. The generated probe verifies deferred initialization, one-time supplier evaluation, stable reuse, and the non-initializing orElse operation without external state.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	LazyConstantsSecondPreviewExamples.CommandResult	Result from one child process invocation.
static final record	LazyConstantsSecondPreviewExamples.LazyConstantsWorkflowResult	Result from compiling and running the generated preview source.

Constructor Summary

Constructors

Constructor	Description
LazyConstantsSecondPreviewExamples()

Method Summary

Modifier and Type	Method	Description
String	comparisonWithFinalFields()	Explains the relationship to ordinary final fields.
String	previewBoundary()	Explains why the preview API runs in a child process.
String	probeSource()	Source used by the child JVM to exercise the preview Lazy Constants API.
String	problem()	Explains the problem addressed by Lazy Constants.
LazyConstantsSecondPreviewExamples.LazyConstantsWorkflowResult	runLazyConstantsWorkflow(Path workspace)	Runs the Java 26 preview Lazy Constants workflow.
String	status()	Describes the Java 26 maturity level.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LazyConstantsSecondPreviewExamples

public LazyConstantsSecondPreviewExamples()

Method Details

runLazyConstantsWorkflow

public LazyConstantsSecondPreviewExamples.LazyConstantsWorkflowResult runLazyConstantsWorkflow(Path workspace)
                                                                                        throws IOException,
InterruptedException

Runs the Java 26 preview Lazy Constants workflow.

Parameters:

workspace - temporary directory for generated source and classes

Returns:

result containing compilation and execution output

Throws:

IOException - when the source file cannot be written

InterruptedException - when waiting for a child process is interrupted

probeSource

public String probeSource()

Source used by the child JVM to exercise the preview Lazy Constants API.

Returns:

generated Java source

problem

public String problem()

Explains the problem addressed by Lazy Constants.

Returns:

a short problem statement

comparisonWithFinalFields

public String comparisonWithFinalFields()

Explains the relationship to ordinary final fields.

Returns:

a short comparison

status

public String status()

Describes the Java 26 maturity level.

Returns:

a short status note

previewBoundary

public String previewBoundary()

Explains why the preview API runs in a child process.

Returns:

the preview boundary