单项选择题

Given:

What is the result?()

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]

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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();

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