Special usage of Android -- split () to split strings, csplit to separate strings

Special usage of Android -- split () to split strings, csplit to separate strings
Split () split string 1. Differentiation in different environments

Java: The split string cannot be written as split ("$") // $ is the character to be split.
Android: The split string must contain brackets ("[$]"). // $ indicates the character to be split.

2. Special usage -- Case Study of split () character strings in special characters

1 String str = "abc | dfg"; 2 3 String [] all = str. split ("|"); 4 5 system. out. println (all [0]); 6 7 returns

 

Cause Analysis

| A regular expression is a special character (".", "|", "^", and so on) that has been used)

To use |, you must use \ for escape. In java strings, \ is also a special symbol that has been used and must be escaped using.

So it should be: String [] all = str. split ("\ | ");