[java] java.lang.NullPointerException
     [java]     at blockworld.EnvView.<init>(Unknown Source)
     [java]     at blockworld.Window.<init>(Unknown Source)
     [java]     at blockworld.Env.<init>(Unknown Source)
     [java]     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     [java]     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
     [java]     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
     [java]     at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
     [java]     at apapl.env.EnvLoader.fromJarFile(Unknown Source)
     [java]     at apapl.APAPLBuilder.buildMas(Unknown Source)
     [java]     at gui.GUI.loadMas(Unknown Source)
     [java]     at gui.GUI.openFile(Unknown Source)
     [java]     at gui.Toolbar.processAction(Unknown Source)
     [java]     at gui.Toolbar.actionPerformed(Unknown Source)
     [java]     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
     [java]     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
     [java]     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
     [java]     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
     [java]     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
     [java]     at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
     [java]     at java.awt.Component.processMouseEvent(Component.java:6533)
     [java]     at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
     [java]     at java.awt.Component.processEvent(Component.java:6298)
     [java]     at java.awt.Container.processEvent(Container.java:2236)
     [java]     at java.awt.Component.dispatchEventImpl(Component.java:4889)
     [java]     at java.awt.Container.dispatchEventImpl(Container.java:2294)
     [java]     at java.awt.Component.dispatchEvent(Component.java:4711)
     [java]     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
     [java]     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
     [java]     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
     [java]     at java.awt.Container.dispatchEventImpl(Container.java:2280)
     [java]     at java.awt.Window.dispatchEventImpl(Window.java:2746)
     [java]     at java.awt.Component.dispatchEvent(Component.java:4711)
     [java]     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
     [java]     at java.awt.EventQueue.access$500(EventQueue.java:97)
     [java]     at java.awt.EventQueue$3.run(EventQueue.java:709)
     [java]     at java.awt.EventQueue$3.run(EventQueue.java:703)
     [java]     at java.security.AccessController.doPrivileged(Native Method)
     [java]     at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
     [java]     at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
     [java]     at java.awt.EventQueue$4.run(EventQueue.java:731)
     [java]     at java.awt.EventQueue$4.run(EventQueue.java:729)
     [java]     at java.security.AccessController.doPrivileged(Native Method)
     [java]     at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
     [java]     at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
     [java]     at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
     [java]     at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
     [java]     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
     [java]     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
     [java]     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
     [java]     at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
     [java] java.lang.NullPointerException