java.lang.Error: Unresolved compilation problems: String cannot be resolved to a type Double cannot be resolved to a type Double cannot be resolved System cannot be resolved JOptionPane cannot be resolved System cannot be resolved Properties cannot be resolved to a type Properties cannot be resolved to a type FastLookAndFeel cannot be resolved UIManager cannot be resolved Exception cannot be resolved to a type String cannot be resolved to a type String cannot be resolved to a type

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GitHub comment 131#272655434

Unresolved compilation problems: String cannot be resolved to a type Double cannot be resolved to a type Double cannot be resolved System cannot be resolved JOptionPane cannot be resolved System cannot be resolved Properties cannot be

GitHub comment 117#229828039

java.lang.Error: Unresolved compilation problems: 
	String cannot be resolved to a type
	Double cannot be resolved to a type
	Double cannot be resolved
	System cannot be resolved
	JOptionPane cannot be resolved
	System cannot be resolved
	Properties cannot be resolved to a type
	Properties cannot be resolved to a type
	FastLookAndFeel cannot be resolved
	UIManager cannot be resolved
	Exception cannot be resolved to a type
	String cannot be resolved to a type
	String cannot be resolved to a type	at src.com.mrcrayfish.modelcreator.Start.main(Start.java:12)