Java
A widely-used, object-oriented language that runs anywhere via a virtual machine.
Java compiles to bytecode that runs on the JVM, so the same program works across operating systems ('write once, run anywhere'). It's statically typed, has automatic memory management, and dominates enterprise backends, Android, and large systems where stability matters more than brevity.
The JVM's JIT compiler optimizes hot code paths at runtime, and its mature garbage collectors (G1, ZGC) tune for throughput vs. latency; the ecosystem (Spring, Maven) is vast.
Spring Boot microservices, Android apps, Kafka, Elasticsearch, large banking systems.
Like a stage play written in a universal script: any theatre (the JVM) with the right crew can perform it identically, whether in Tokyo or Toronto.