单项选择题
Given a method that must ensure that its parameter is not null:
11. public void someMethod(Object value) {
12. // check for null value
...
20. System.out.println(value.getClass());
21. }
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"); }
相关考题
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单项选择题
A team of programmers is involved in reviewing a proposed design for a new utility class. After some discussion, they realize that the current design allows other classes to access methods in the utility class that should be accessible only to methods within the utility class itself. What design issue has the team discovered?()
A.Tight coupling
B.Low cohesion
C.High cohesion
D.Loose coupling
E.Weak encapsulation -
单项选择题
Given: 11.double input = 314159.26; 12.NumberFormat nf = NumberFormat.getInstance(Locale.ITALIAN); 13.String b; 14.//insert code here Which code, inserted at line 14, sets the value of b to 314.159,26?()
A.b = nf.parse( input );
B.b = nf.format( input );
C.b = nf.equals( input );
D.b = nf.parseObject( input ); -
单项选择题
Given: If an instance of class Beagle is created,then Serialized,then deSerialized, what is the result?()
A.ad
B.ada
C.add
D.adad
