Given: Which command-line invocations will compile?()
A.javac Mule.java B.javac -source 1.3 Mule.java C.javac -source 1.4 Mule.java D.javac -source 1.5 Mule.java
单项选择题Given a method that must ensure that its parameter is not null: What, inserted at line 12, is the appropriate way to handle a null value?()
A.assert value == null; B.assert value != null, "value is null"; C.if (value == null) { throw new AssertionException("value is null"); } D.if (value == null) { throw new IllegalArgumentException("value is null"); }
单项选择题Given: What is the result?()
A.An Exception is thrown with no other output B.B, followed by an Exception. C.Compilation fails due to an error on line 9. D.Compilation fails due to an error on line 15.
A.Compilation fails. B.aAaA aAa AAaa AaA C.AAaa AaA aAa aAaA D.AaA AAaa aAaA aAa E.aAa AaA aAaA AAaa
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]
多项选择题Givenaclasswhoseinstances,whenfoundinacollectionofobjects,aresortedbyusingthecompare To method,whichtwostatementsaretrue?()
A.The class implements java.lang.Comparable. B.The class implements java.util.Comparator. C.The interface used to implement sorting allows this class to define only one sort sequence. D.The interface used to implement sorting allows this class to define many different sort sequences.