Class PrimitivePatternsFourthPreviewExamples

java.lang.Object

net.jrodolfo.java_evolution.java26.PrimitivePatternsFourthPreviewExamples

public class PrimitivePatternsFourthPreviewExamples
extends Object

Demonstrates primitive patterns, previewed for the fourth time in Java 26 by JEP 530.

The repository itself does not compile against preview syntax. Instead, this example writes a small Java 26 source file, compiles it with javac --enable-preview --release 26, and runs it with java --enable-preview. That keeps preview flags isolated from the main Maven build while exercising the real syntax.

Nested Class Summary

Nested Classes

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

Constructor Summary

Constructors

Constructor	Description
PrimitivePatternsFourthPreviewExamples()

Method Summary

Modifier and Type	Method	Description
String	previewBoundary()	Explains why this example uses a child process.
String	probeSource()	Source used by the child JVM to exercise Java 26 preview syntax.
String	purpose()	Explains the feature goal.
PrimitivePatternsFourthPreviewExamples.PrimitivePatternsWorkflowResult	runPrimitivePatternsWorkflow(Path workspace)	Runs a real Java 26 preview primitive-pattern workflow.
String	safetyGoal()	Explains the safety benefit of primitive patterns.
String	testBoundary()	Explains what this executable example can and cannot prove.

Methods inherited from class Object

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

Constructor Details

PrimitivePatternsFourthPreviewExamples

public PrimitivePatternsFourthPreviewExamples()

Method Details

runPrimitivePatternsWorkflow

public PrimitivePatternsFourthPreviewExamples.PrimitivePatternsWorkflowResult runPrimitivePatternsWorkflow(Path workspace)
                                                                                                    throws IOException,
InterruptedException

Runs a real Java 26 preview primitive-pattern workflow.

Parameters:

workspace - temporary directory for generated source and class files

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 Java 26 preview syntax.

Returns:

generated Java source

purpose

public String purpose()

Explains the feature goal.

Returns:

a short explanation

safetyGoal

public String safetyGoal()

Explains the safety benefit of primitive patterns.

Returns:

a short safety explanation

previewBoundary

public String previewBoundary()

Explains why this example uses a child process.

Returns:

the preview boundary

testBoundary

public String testBoundary()

Explains what this executable example can and cannot prove.

Returns:

the test boundary