"Write once, run anywhere" (WORA), or sometimes write once, run everywhere (WORE), is a slogan created by Sun Microsystems to illustrate the cross-platform benefits of the Java language. Ideally, this means Java can be developed on any device, compiled into a standard bytecode and be expected to run on any device equipped with a Java virtual machine (JVM). The installation of a JVM or Java interpreter on chips, devices or software packages has become an industry standard practice.

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  • "Write once, run anywhere" (WORA), or sometimes write once, run everywhere (WORE), is a slogan created by Sun Microsystems to illustrate the cross-platform benefits of the Java language. Ideally, this means Java can be developed on any device, compiled into a standard bytecode and be expected to run on any device equipped with a Java virtual machine (JVM). The installation of a JVM or Java interpreter on chips, devices or software packages has become an industry standard practice. This means a programmer can develop code on a PC and can expect it to run on Java enabled cell phones, as well as on routers and mainframes equipped with Java, without any adjustments. This is intended to save software developers the effort of writing a different version of their software for each platform or operating system they intend to deploy on. This idea originated as early as in the late 1970s, when the UCSD Pascal system was developed to produce and interpret p-code. UCSD Pascal (along with the Smalltalk virtual machine) was a key influence on the design of the Java virtual machine, as is cited by James Gosling. The catch is that since there are multiple JVM implementations, on top of a wide variety of different operating systems such as Windows, Linux, Solaris, NetWare, HP-UX, and Mac OS, there can be subtle differences in how a program may execute on each JVM/OS combination, which may require an application to be tested on various target platforms. This has given rise to the joke among Java developers, "Write Once, Debug Everywhere". However, for a developer, the abstraction layer that Java provides is usually more convenient than recompiling software for each combination of operating system and architecture that it should run on and still represents a significant reduction in work when developing and supporting an application on multiple platforms.
  • "Write once, run anywhere" (WORA、「一度（プログラムを）書けば、どこでも実行できる」)とは、Javaのプログラムがオペレーティングシステム (OS) などのプラットフォームに依存しないという意味の、サン・マイクロシステムズのJavaのスローガンである。Write once, run everywhere (WORE) ともいう。
  • WORA, "Write once, run anywhere" ou "Escreva uma vez, execute em qualquer lugar", é o slogan da Sun MicroSystems para exemplificar os benefícios multi-plataforma da Linguagem Java.
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  • "Write once, run anywhere" (WORA、「一度（プログラムを）書けば、どこでも実行できる」)とは、Javaのプログラムがオペレーティングシステム (OS) などのプラットフォームに依存しないという意味の、サン・マイクロシステムズのJavaのスローガンである。Write once, run everywhere (WORE) ともいう。
  • WORA, "Write once, run anywhere" ou "Escreva uma vez, execute em qualquer lugar", é o slogan da Sun MicroSystems para exemplificar os benefícios multi-plataforma da Linguagem Java.
  • "Write once, run anywhere" (WORA), or sometimes write once, run everywhere (WORE), is a slogan created by Sun Microsystems to illustrate the cross-platform benefits of the Java language. Ideally, this means Java can be developed on any device, compiled into a standard bytecode and be expected to run on any device equipped with a Java virtual machine (JVM). The installation of a JVM or Java interpreter on chips, devices or software packages has become an industry standard practice.
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  • Write once, run anywhere
  • Write once, run anywhere
  • WORA
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