Given: A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result?()
A.Tea B.Coffee C.CoffeeTea D.Compilation fails
单项选择题Given: What is the result?()
A.Compilation fails. B.An exception is thrown at runtime. C.[608, 610, 612, 629] [608, 610] D.[608, 610, 612, 629] [608, 610, 629] E.[606, 608, 610, 612, 629] [608, 610]
A.[1, 2, 3, 5] B.[2, 1, 3, 5] C.[2, 5, 3, 1] D.[5, 3, 2, 1] E.[1, 3, 5, 2]
单项选择题Given: Which statement is true?()
A.Compilation fails because the hashCode method is not overridden. B.A HashSet could contain multiple Person objects with the same name. C.All Person objects will have the same hash code because the hashCode method is not overridden. D.If a HashSet contains more than one Person object with name="Fred", then removing another Person,also with name="Fred", will remove them all.
多项选择题WhichtwocodefragmentswillexecutethemethoddoStuff()inaseparatethread?()
A.new Thread() {public void run() { doStuff(); }}; B.new Thread() {public void start() { doStuff(); }}; C.new Thread() {public void start() { doStuff(); }}.run(); D.new Thread() {public void run() { doStuff(); }}.start(); E.new Thread(new Runnable() {public void run() { doStuff(); }}).start();
单项选择题Click the Exhibit button. What is the result?()
A.The code will deadlock. B.The code may run with no output. C.An exception is thrown at runtime. D.The code may run with output "0 6". E.The code may run with output "2 0 6 4". F.The code may run with output "0 2 4 6".