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Exception in thread "main" java.lang.Error: Unresolved compilation problems:
        Display cannot be resolved to a type
        Display cannot be resolved to a type
        Shell cannot be resolved to a type

        at org.eclipse.swt.examples.addressbook.AddressBook.main(AddressBook.java:54)


#53 public static void main(String[] args) {
#54     Display display = new Display();
#55     AddressBook application = new AddressBook();