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    This happens when you try to instantiate a class that can't be instantiated, either because the class object is abstract, an interface, an array class, a primitive type, void, or because the class has no nullary constructor.

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java.lang.InstantiationException: org.apache.tools.ant.Main	at java.lang.Class.newInstance0(Class.java:293)	at java.lang.Class.newInstance(Class.java:261)	at org.apache.tools.ant.launch.Launcher.run(Launcher.java:195)	at org.apache.tools.ant.launch.Launcher.main(Launcher.java:55)