java - String的split方法可能出错

Question

我有下一个代码:

String test = "A,B,,,,,";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

输出是:

$A$
$B$

我期望:

$A$
$B$
$$
$$
$$
$$
$$

但是，我修改了如下代码:

String test = "A,B,,,,,C";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

结果是:

$A$
$B$
$$
$$
$$
$$
$C$

其他变化:

String test = "A,B,,,C,,";

String[] result = test.split(",");

for(String s : result){
    System.out.println("$"+s+"$");
}

结果:

$A$
$B$
$$
$$
$C$

有什么想法吗？

我需要这个来将 csv 文件转换为 java 对象，但是当他们没有向我发送最后一列时，代码无法正常工作

Answer 1

来自docs :

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.