Cannot Load 32-bit Swt Libraries On 64-bit Jvm Apr 2026

Replace the swt.jar in your project's classpath with the correct one. If you use Maven, never just add swt.jar manually. Use the official Maven artifacts with classifiers:

Stick to Maven artifacts with platform classifiers, and you'll rarely see this error again. Have you run into other SWT native library issues? Share your war stories in the comments below.

<dependency> <groupId>org.eclipse.platform</groupId> <artifactId>org.eclipse.swt.win32.win32.x86_64</artifactId> <version>3.125.0</version> </dependency> The classifier ( win32.win32.x86_64 ) encodes both OS and architecture. For other platforms: cannot load 32-bit swt libraries on 64-bit jvm

dumpbin /headers swt-win32.dll | find "machine" Or on Linux/macOS:

java -d32 -jar yourapp.jar If you get Unrecognized option: -d32 , it's not available. Don't waste time here – fix the library instead. If you're distributing a desktop app, don't bundle a specific swt.jar . Instead, use a launcher script that adds the correct SWT JAR based on the detected platform and architecture. Replace the swt

For Gradle:

file swt-gtk.so If it says x86 (32-bit) and your JVM is x64 (64-bit), you've found the mismatch. Method 1: Download the Correct SWT Build (Manual Fix) Go to the official SWT download page and select your platform + architecture. Have you run into other SWT native library issues

dependencies implementation 'org.eclipse.platform:org.eclipse.swt.win32.win32.x86_64:3.125.0'

| Platform | Artifact ID (classifier part) | |---------------|----------------------------------------| | Windows 64-bit | org.eclipse.swt.win32.win32.x86_64 | | Linux 64-bit | org.eclipse.swt.gtk.linux.x86_64 | | macOS 64-bit | org.eclipse.swt.cocoa.macosx.x86_64 | | macOS ARM64 | org.eclipse.swt.cocoa.macosx.aarch64 |