Java split（）方法混淆

Question

我不明白为什么它是这样工作的——请参见下面的split（）方法用例

    String x = "one,";
    String y = ",one";
    System.out.println(Arrays.toString(x.split(","))); //prints [one]
    System.out.println(Arrays.toString(y.split(","))); //prints [, one]

我希望他们打印[一，]和[一]

Answer 1

的Javadoc回答说：

This method works as if by invoking the two-argument split method with the given expression and a limit argument of zero. Trailing empty strings are therefore not included in the resulting array.

x.split(",",-1)将导致[one, ]