java – 有没有理由为什么File中的某些方法使用布尔值来表示它的

以下是从mkdir()获取的文档摘要,说明了要求：

public boolean mkdir()

Creates the directory named by this file,assuming its parents exist. Use mkdirs if you also want to create missing parents.

Note that this method does not throw IOException on failure. Callers
must check the return value.

还有一个createNewFile()的情况(甚至更奇怪)使用布尔值和抛出异常来表示成功：

public boolean createNewFile() throws IOException

Creates a new,empty file on the file system according to the path
information stored in this file. This method returns true if it
creates a file,false if the file already existed. Note that it
returns false even if the file is not a file (because it’s a
directory,say).

…

Note that this method does not throw IOException if the file already
exists,even if it’s not a regular file. Callers should always check
the return value,and may additionally want to call isFile.

现在,这看起来很不方便,因为用户必须预测两种错误情况,而不是仅使用简单的try-catch块.

这个大惊小怪的原因是什么？