Java SE learning _ string [] Split (string RegEx) _ note

String [] Split (string RegEx)

Split this string based on the matching of the given regular expression. "//" is required for the RegEx symbol in Java, because RegEx uses "/" as the escape character. In Java, a "/" must be represented.

If "." is used for segmentation, it must be like this "//." If yes | also "// | ".

 

List several examples:

String B = new string ("30: 20 ");
String [] Ss = B. Split (":"); // No problem

String S = new string ("30 + 2 ");

String [] Ss = S. Split ("// + ");

String [] STRs = "Java. Lang. String". Split ("//.");
// STRs [2] = "string"
// Method 2:
String source = "Java. Lang. String ";
Int idx = source. lastindexof (".");
String STR = source. substring (idx );
// STR = "string"