• The Java Version Almanac

Snippets of Modern Java

A small but growing gallery of code snippets demonstrating the capabilities and idioms of modern Java.

All snippets can be directly modified and executed in Java 21 sandboxes.

Java Language

• Method References
• Numeric Literals
• Records
• Text Blocks

Functional Interfaces

• Not Predicate

Input/Output

• Read and Write Binary Files
• Read and Write Text Files

Networking

• Unix Domain Sockets

Security

• Diffie-Hellman Key Agreement
• Message Authentication Code
• Message Signature

Time and Date

• Calculate With Local Dates
• Calendar Systems
• Convert Between Time Zones
• Daylight Saving Time
• Friday 13th
• World Clock

Utilities

• Collection Constants
• Comparators
• Optional Values