Question

java中使用\r\n和\n\r的区别

在java中为什么使用"abc" + ”\n\rdef”时可以在中间空两行？使用"abc" + ”\r\ndef”只能空一行？谢谢！

Answer 1

\r是回车,\n是换行.有的控件是要\r\n才能达到换行的

Answer 2

enter+newline with different platforms:
windows: \r\n
mac: \r
unix/linux: \n

in "abc" + ”\n\rdef”, \n\r do not match any platform,so it is considered as \n and \r (which match unix/linux and mac),so there are two new lines.

in "abc" + ”\r\ndef” \r\n matches the windows platform,so it is considered as only one new line.

scim crushed, so just English.

Answer 3

*,包含了该包下面的所有类(不包含子包下面的类)
导入类,只能使用该包下面被导入的指定类