I've created a comprehensive set of reusable Java assets to help with migrating from Java 8 to Java 17, particularly in a WebSphere Application Server environment. These utilities address common migration challenges and provide backward-compatible implementations of modern Java features.

The assets include:

1. Java8ToJava17MigrationUtils.java

   • Demonstrates how to use Java 9+ features with Java 8 compatibility
   • Includes examples of collection factories, stream enhancements, and modern language features
   • Shows how to write code that works in both Java 8 and Java 17 environments

2. JavaEEMigrationUtils.java

   • Provides utilities for migrating Java EE components to Jakarta EE
   • Includes helpers for JNDI, connection pools, thread pools, and XML processing
   • Demonstrates patterns for enterprise Java applications in both Java 8 and Java 17

3. WebSphereMigrationUtils.java

   • Contains WebSphere-specific migration utilities
   • Includes helpers for JMX, JNDI, configuration, security, and transactions
   • Shows how to handle differences between traditional WebSphere and Liberty/Open Liberty

4. ModernJavaPatterns.java

   • Demonstrates modern Java programming patterns with Java 8 compatibility
   • Includes utilities for collections, strings, file I/O, date/time, and functional programming
   • Shows how to write clean, modern code that works across Java versions

5. MigrationTestingUtils.java

   • Provides tools for testing Java migrations
   • Includes utilities for comparing implementations, measuring performance, and validating compatibility
   • Helps ensure that migrated code behaves correctly and efficiently

These utilities can be used individually or together to facilitate a smooth migration from Java 8 to Java 17 in your WebSphere environment.