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();
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                                    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));
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                                    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");
 
             
             
                
            