String a = “ABCD”; String b = a.toLowerCase(); b.replace(‘a’, ‘d’); b.replace(‘b’, ‘c’); System.out.println(b); What is the result? ()
- A、 abcd
- B、 ABCD
- C、 dccd
- D、 dcba
- E、 Compilation fails.
- F、 An exception is thrown at runtime.
正确答案:A
答案解析:有

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