02 String, escape character __java

1 string: always thought string (String type) was the underlying type in previous use, and it was actually a reference type (pleasantly surprised, not magical). And there are several points to note in the use of strings: 1 "+" describes the connection of the character 2) all types and string types are "+" operations, then all types become string types, and if you want to implement the addition of the underlying type, you use the "()" 2 escape character Common escape characters: 1 newline: \ n 2) tab: \ t 3 single quotation mark: \ ' 4 ' double quotation mark: \ ' 5 ' \:\\