- suppress most java warnings

src/readers/bioformats_java.rs

@@ -106,11 +106,19 @@ fn jvm() -> Rc<Jvm> {
                     Jvm::attach_thread().expect("Failed to attach to JVM")
                 } else {
                     *jvm_built = true;
-                    JvmBuilder::new()
+                    let j = JvmBuilder::new()
                         .skip_setting_native_lib()
                         .with_base_path(class_path.to_str().unwrap())
                         .build()
-                        .expect("Failed to build JVM")
+                        .expect("Failed to build JVM");
+                    if let Ok(e) = InvocationArg::try_from("ERROR") {
+                        let _ = j.invoke_static(
+                            "loci.common.DebugTools",
+                            "setRootLevel",
+                            &[e],
+                        );
+                    }
+                    j
                 })
             }
         })
@@ -484,7 +492,6 @@ impl Reader for BioFormatsJavaReader {
     where
         P: AsRef<Path>,
     {
-        DebugTools::set_root_level("ERROR")?;
         let mut path = path.as_ref().to_path_buf();
         if path.is_dir() {
             let orig = path.clone();
@@ -562,7 +569,6 @@ impl Reader for BioFormatsJavaReader {
     where
         P: AsRef<Path>,
     {
-        DebugTools::set_root_level("ERROR")?;
         let mut path = path.as_ref().to_path_buf();
         if path.is_dir() {
             let orig = path.clone();