Remove reference to internal class (#393)

Author: fourlastor

README.md

@@ -15,7 +15,7 @@ VisUI is licensed under Apache2 license meaning that you can use it for free in
 
 [![Maven Central](https://img.shields.io/maven-central/v/com.kotcrab.vis/vis-ui.svg)](https://search.maven.org/artifact/com.kotcrab.vis/vis-ui)
 
-Please refer to [libGDX documentation](https://libgdx.com/wiki/articles/dependency-management-with-gradle) if you don't know how to mange dependencies with Gradle. Alternatively JAR can be downloaded from [Maven repository](http://search.maven.org/#search|gav|1|g%3A%22com.kotcrab.vis%22%20AND%20a%3A%22vis-ui%22). If you are creating new project, you can use gdx-setup to automatically add VisUI for you. (press 'Show Third Party Extension' button)
+Please refer to [libGDX documentation](https://libgdx.com/wiki/articles/dependency-management-with-gradle) if you don't know how to manage dependencies with Gradle. Alternatively JAR can be downloaded from [Maven repository](http://search.maven.org/#search|gav|1|g%3A%22com.kotcrab.vis%22%20AND%20a%3A%22vis-ui%22). If you are creating new project, you can use gdx-setup to automatically add VisUI for you. (press 'Show Third Party Extension' button)
 
 #### Manual Gradle setup:
 

ui/src/main/java/com/kotcrab/vis/ui/widget/file/FileUtils.java

@@ -16,7 +16,6 @@
 
 package com.kotcrab.vis.ui.widget.file;
 
-import com.apple.eio.FileManager;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.files.FileHandle;
 import com.badlogic.gdx.utils.Array;
@@ -25,6 +24,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
 import java.text.DecimalFormat;
 import java.util.Comparator;
 
@@ -164,19 +164,26 @@ public static void showDirInExplorer (FileHandle dir) throws IOException {
 			dirToShow = dir.parent().file();
 		}
 
-		if (OsUtils.isMac()) {
-			FileManager.revealInFinder(dirToShow);
-		} else {
+		try {
+			// Using reflection to avoid importing AWT desktop which would trigger Android Lint errors
+			// This is desktop only, rarely called, performance drop is negligible
+			// Basically 'Desktop.getDesktop().open(dirToShow);'
+			Class desktopClass = Class.forName("java.awt.Desktop");
+			Object desktop = desktopClass.getMethod("getDesktop").invoke(null);
 			try {
-				// Using reflection to avoid importing AWT desktop which would trigger Android Lint errors
-				// This is desktop only, rarely called, performance drop is negligible
-				// Basically 'Desktop.getDesktop().open(dirToShow);'
-				Class desktopClass = Class.forName("java.awt.Desktop");
-				Object desktop = desktopClass.getMethod("getDesktop").invoke(null);
+				// browseFileDirectory was introduced in JDK 9
+				desktopClass.getMethod("browseFileDirectory", File.class).invoke(desktop, dirToShow);
+			} catch (NoSuchMethodException | InvocationTargetException e) {
+				// browseFileDirectory throws UnsupportedOperationException on some platforms, which is then
+				// wrapped in InvocationTargetException because it's accessed via reflection.
+				// throw again all other exceptions we didn't expect
+				if (e instanceof InvocationTargetException && !(e.getCause() instanceof UnsupportedOperationException)) {
+					throw e;
+				}
 				desktopClass.getMethod("open", File.class).invoke(desktop, dirToShow);
-			} catch (Exception e) {
-				Gdx.app.log("VisUI", "Can't open file " + dirToShow.getPath(), e);
 			}
+		} catch (Exception e) {
+			Gdx.app.log("VisUI", "Can't open file " + dirToShow.getPath(), e);
 		}
 	}
 }