How to Run a Java JAR from C#: 5 Methods Benchmarked

I've tested all 5 approaches to running Java JARs from C# in production — from simple Process.Start() to in-process bridges. Each has real trade-offs that benchmarks alone won't tell you. Originally published on the JNBridge blog . Why Run Java JAR Files from .NET? You’ve got a Java JAR file. Maybe it’s a proprietary library your organization built over years. Maybe it’s an open-source tool like Apache Tika (document parsing), Bouncy Castle (cryptography), or Stanford NLP (natural language processing). Whatever it is, you need its functionality in your C# or .NET application — without rewriting it. Want the fastest, most reliable approach? JNBridgePro lets you call Java JARs from C# with native method syntax — no process spawning, no HTTP overhead. Download a free evaluation to compare. This is more common than you’d think. According to Stack Overflow’s developer survey, organizations running both Java and .NET account for over 40% of enterprise environments. The question isn’t whether