试题详情
- 单项选择题 Given: 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");
G、sb1.append("abc"); s1 = s1 + s1.concat("abc");
H、sb1.concat("abc"); s1 = s1 + s1.concat("abc");
- E
关注下方微信公众号,在线模考后查看
热门试题