Oracleの木琴サンプル、そのまま起動してみた。

MathKitJavaFX/src/zenryokuservice/fx/tutorial/step3/AnimationBasic.java

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+/**
+ * Copyright (c) 2019-present Math Kit JavaFX Library All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+ * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+ * Neither the name Math Kit JavaFX Library nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+ */
+package zenryokuservice.fx.tutorial.step3;
+
+/**
+ * @author takunoji
+ * @see 
+ * 2019/03/15
+ */
+public class AnimationBasic {
+
+}