You limit your application to <4GB of heap memory and lose performance optimizations available in 64-bit architectures. Only use this as a last resort.
java version "17.0.6" 2023-01-17 LTS Java(TM) SE Runtime Environment (build 17.0.6+9-LTS-190) Java HotSpot(TM) 64-Bit Server VM (build 17.0.6+9-LTS-190, mixed mode, sharing)
It stops your application dead in its tracks, and the fix isn't always obvious. In this post, we'll break down why this happens, how to diagnose it, and the cleanest ways to fix it for good. cannot load 32-bit swt libraries on 64-bit jvm
If you control the application, simply swap the library.
The classifier ( win32.win32.x86_64 ) encodes both OS and architecture. For other platforms: You limit your application to <4GB of heap
Extract the JAR or peek inside. On Windows, if you see a .dll file, you can check its bitness using:
A: A fat JAR cannot contain native libraries for multiple architectures. You must exclude the SWT native libraries from the fat JAR and load the correct version dynamically at runtime, or create separate fat JARs per platform. In this post, we'll break down why this
The "cannot load 32-bit SWT libraries on 64-bit JVM" error is a classic architecture mismatch. It's not a bug – it's a safety feature preventing crashes or undefined behavior. Once you understand that SWT is not pure Java, the fix becomes straightforward: .