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java试卷（java试卷） I. judgment questions 1. static initializers do not have a method name, return value, and parameter list. The static initializer is automatically invoked by the system when the class it belongs to is loaded into memory. B. 2., any Java Applet program, you must load the java.applet package; any use of graphical interfaces, you must load java.awt packages; those who use graphical interface event processing, you must load java.awt.event package. B. The 3. interface is a special class in the interface domain is constant, interfaces are abstract methods, so the interface of the domain by the public static final should be modified, the methods in the interface should be modified by public abstract. * 4. any class has a constructor, and if there is no constructor, the object of that class cannot be created. B. The delegation event model into the 5.Java event handling mechanism, specifically, all event classes have a listener interface corresponding to each, and specific events in the event class type has a corresponding specific and abstract methods. * 6. all the methods that have been modified by the private modifier and the methods contained in the final class are all final methods. B. 7. single line text boxes TextField and multiline text area TextArea can raise the TEXT_VALUE_CHANGED events represented by the TextEvent class and the ACTION_PERFORMED events of the ActionEvent class. * The 8. interface is a special class, so the interface can also inherit, and the child interface will inherit all the constants and abstract methods of the parent interface. B. 9. set the String object s= Hi, then the statement System.out.println (s.concat (Yohoo, )) is Hi Yohoo!. B. 10. when you create a Vector object, you can specify an extension unit for that object, such that if you do not specify that the system will extend the object as an initial capacity of Vector. B. 11.Java Applet is interpreted by independent interpreter programs. * 12.Java source programs are ma