Java split usage Summary

The difference between Split ("") and split.

• There is a space between Split ("") and ""

String S = "The rain in Spain falls mainly in the plain."; // "there are spaces between them, and each space character is decomposed. String [] Ss = S. split (""); system. out. println ("[ss [0] =" + SS [0] + "]"); system. out. println ("["); For (string: SS) {system. out. println (string);} system. out. println ("]");

Program effect:
[Ss [0] = The]
[
The
Rain
In
Spain
Falls
Mainly
In
The
Plain.
]

========================================================== ==========

• There is no space between Split ("") and ""

String S = "The rain in Spain falls mainly in the plain."; // "there is no space between them. String [] Ss = S. [do not translate, just delete the space! System. out. println ("[ss [0] =" + SS [0] + "]"); system. out. println ("["); For (string: SS) {system. out. println (string);} system. out. println ("]");

Program effect:

[ss[0] =][The rain in Spain falls mainly in the plain.]

This is what I encountered when I split the IP address again today! I have never thoroughly studied it before! Ah .....

Although there are explanations on the internet, I still want to summarize it so that you can make your own things!

• Split using split:

String IP = "127.0.0.1"; string [] S = IP. split (". "); <----- the death of the live token to the results for (string: S) {system. out. println (string );}

• Improve the split parameter settings after searching for materials
• Use split ("//.") to split:

     String ip = "127.0.0.1"; //     String [] s = ip.split(".");String [] s = ip.split("//.");for (String string : s) {System.out.println(string);}

Program running effect: 127001

• Cause Analysis: Split (string RegEx) is a regular expression rather than a normal string.

• Experience Sharing:
• 1. The separator is ". "(no output)," | "(cannot get the correct effect) when escaping characters," * "," + "error throws an exception, you must add "//" to the front, such as split (// | );
• 2. If you use "/" as the separator, you must write it as follows: string. split ("//"), because "//" is used in Java to express "/", the string must be written as follows: string STR = "A // B // C ";
• Escape Character, which must contain "//";
• 3. If a string contains multiple separators, you can use "|" as a hyphen, for example, string STR = "Java string-split # test". You can use Str. split ("|-| #") removes each string;