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");
相关考题
-
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){ } -
多项选择题
Giventhatcisareferencetoavalidjava.io.Consoleobject,whichtwocodefragmentsreadalineoftextfromtheconsole?()
A.String s = c.readLine();
B.char[ ] c = c.readLine();
C.String s = c.readConsole();
D.char[ ] c = c.readConsole();
E.String s = c.readLine("%s", "name ");
F.char[ ] c = c.readLine("%s", "name ");
