单项选择题
What is the result?()
A.The value "4" is printed at the command line.
B.Compilation fails because of an error in line 5.
C.Compilation fails because of an error in line 9.
D.A NullPointerException occurs at runtime.
E.A NumberFormatException occurs at runtime.
F.An IllegalStateException occurs at runtime.
相关考题
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单项选择题
Which code fragment, inserted at line 24, outputs "123abc 123abc"?()
A.sb1.append("abc"); s1.append("abc");
B.sb1.append("abc"); s1.concat("abc");
C.sb1.concat("abc"); s1.append("abc");
D.sb1.concat("abc"); s1.concat("abc");
E.sb1.append("abc"); s1=s1.concat("abc");
F.sb1.concat("abc"); s1=s1.concat("abc"); -
单项选择题
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 a vaid DateFormat object named df, and What updates d’s value with the date represented by ds?()
A.18.d=df.parse(ds);
B.18.d=df.getDate(ds);
C.18.try{19.d=df.parse(ds);20. }catch(ParseException e){ }
D.18.try{19.d=df.getDate(ds);20. }catch(ParseException e){ }
