单项选择题
What is the result?()
A.7
B.49
C.343
D.Compilation fails.
E.An exception is thrown at runtime.
相关考题
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单项选择题
Which code fragment, inserted at line 23, allows the code to compile?()
A.df = new DateFormat();
B.df = Date.getFormat();
C.df = date.getFormat();
D.df = DateFormat.getFormat();
E.df = DateFormat.getInstance(); -
单项选择题
Given: 1.d is a valid, non-null Date object 2.df is a valid, non-null DateFormat object set to the current locale What outputs the current locale’s country name and the appropriate version of d’s date?()
A.Locale loc = Locale.getLocale(); System.out.println(loc.getDisplayCountry()+ " " + df.format(d));
B.Locale loc = Locale.getDefault(); System.out.println(loc.getDisplayCountry()+ " " + df.format(d));
C.Locale loc = Locale.getLocale();System.out.println(loc.getDisplayCountry()+ " " + df.setDateFormat(d));
D. Locale loc = Locale.getDefault();System.out.println(loc.getDisplayCountry()+ " " + df.setDateFormat(d)); -
多项选择题
Which two code fragments, inserted independently at line 3, generate the output 4247?()
A. String s = "123456789"; s = (s - "123").replace(1, 3, "24") - "89";
B. StringBuffer s = new StringBuffer("123456789");s.delete(0, 3).replace(1, 3, "24").delete(4, 6);
C. StringBuffer s = new StringBuffer("123456789"); s.substring(3, 6).delete(1,3).insert(1, "24");
D. StringBuilder s = new StringBuilder("123456789");s.substring(3, 6).delete(1, 2).insert(1, "24");
E. StringBuilder s = new StringBuilder("123456789"); s.delete(0, 3).delete(1, 3).delete(2, 5).insert(1, "24");
