The 32-bit architecture was critical here because of memory addressing. Applets ran inside the browser’s process space. Since XP’s browsers were 32-bit, they could only load 32-bit native code. The Java plugin, implemented as a Dynamic Link Library (DLL), had to match that bitness. This symbiosis created a stable, predictable environment. For a developer in 2005, targeting "Java 5 on Windows XP 32-bit" was as safe a bet as targeting "iOS on iPhone" is today.
C'est la version la plus stable et recommandée pour une compatibilité native parfaite avec Windows XP. java pour windows xp 32 bits