| Modern Feature | Backport for Java 8/11 | |----------------|------------------------| | java.util.Optional (more methods) | Stream.findFirst() is native, but use for extra collectors | | Date/Time API (java.time) | Native in Java 8 ✅ | | List.of() , Set.of() | Use Google Guava ( ImmutableList.of ) | | String.isBlank() , lines() | Apache Commons Lang3 ( StringUtils.isBlank ) | | HTTP Client | OkHttp or Apache HC 5.x |
Your goal isn’t to rewrite everything in the latest version. Your goal is to keep the system secure, performant, and maintainable until you’re ready to move. older java
# Critical for Java 8 - enable G1GC and string dedup -XX:+UseG1GC -XX:+UseStringDeduplication -XX:+UseContainerSupport -XX:MaxRAMPercentage=75.0 Avoid Metaspace leaks -XX:MaxMetaspaceSize=256m -XX:+UseContainerSupport | Modern Feature | Backport for Java 8/11
// Instead of waiting for Java 11 public static String repeat(String str, int times) return String.join("", Collections.nCopies(times, str)); int times) return String.join(""
