Java .split("|") not working

You can try to escape it like this:

String[] res = "12345|6".split("\\|");

Pipe has special meaning in regular expression and it allows regular expression components to be logically ORed. So all you need to escape it using the \\

| is a regular expression key character and split() works with regualar expressions. Escape it like this: \\|

Use escape character before | like below:

String[] res = "12345|6".split("\\|");

Similar "escape character logic" is required, when you are dealing/splitting with any of the below special characters (used by Regular Expression):

• OR sign (|)
• question mark (?)
• asterisk (*)
• plus sign (+)
• backslash (\)
• period (.)
• caret (^)
• square brackets ([ and ])
• dollar sign ($)
• ampersand (&)