• 2022-06-07 问题

    StringBuffer sb = new StringBuffer("aynu");sb.insert(1, true);System.out.println(sb); A: trueaynu B: atrueynu C: aynutrue D: 运行不通过

    StringBuffer sb = new StringBuffer("aynu");sb.insert(1, true);System.out.println(sb); A: trueaynu B: atrueynu C: aynutrue D: 运行不通过

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