Modern versions of Java (JDK 11 and later) typically do not offer official 32-bit Windows builds from Oracle. However, many exe4j applications require legacy support.

However, Exe4j is not a compiler — it’s a launcher generator. The resulting .exe still requires a JVM (Java Virtual Machine). If you plan to run your app on older 32‑bit Windows or need to integrate with 32‑bit native libraries (via JNI), you must target a .

Ranking the setup of Exe4j + JAVA_HOME + 32-bit JDK as the comes down to four factors: