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();
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));
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");