使⽤ 用RandomAccessFile 流读取hello.txt⽂ 文件舍弃其 前4⾏ 行 和 后 6⾏ 行的内容,并将其他⾏ 行的内容倒置读 出。-Use file RandomAccessFile stream to read hello.txt ⽂ discarded 4 YES YES line and after 6 rows and the other YES lines inverted read out.