Merge pull request #1269 from Thrameos/min_version

Min version

Author: marscher

doc/CHANGELOG.rst

@@ -29,9 +29,12 @@ Latest Changes:
 
   - Fixed a bug in which JPype did not respect a JConversion between two Java classes.
 
+  - Support for minimum_version argument on startJVM.
+
   - Enhancement in convertToDirectBuffer to support wrapping bytes and readonly
     memoryviews as readonly java ByteBuffers.
 
+
 - **1.5.2 - 2025-01-20**
 
   - Roll back agent change due to misbehaving JVM installs.

jpype/_core.py

@@ -203,6 +203,7 @@ def startJVM(
     ignoreUnrecognized: bool = False,
     convertStrings: bool = False,
     interrupt: bool = not interactive(),
+    minimum_version: typing.Optional[str] = None,
 ) -> None:
     """
     Starts a Java Virtual Machine.  Without options it will start
@@ -366,7 +367,17 @@ def startJVM(
                 locale.setlocale(i, j)
             except locale.Error:
                 pass
-    except RuntimeError as ex: # pragma: no cover, # todo: this assumed it was manually tested.
+
+        if minimum_version is not None:
+            version = _jpype.JClass("java.lang.System").getProperty("java.version")
+            from packaging.version import parse
+            v1 = parse(minimum_version)
+            v2 = parse(str(version))
+            if v1 > v2:
+                err = "Version of JVM is less than minimum requested. (%s<%s, path=%s)" % (v2, v1, jvmpath)
+                raise RuntimeError(err)
+            
+    except RuntimeError as ex:
         source = str(ex)
         if "UnsupportedClassVersion" in source:
             import re