Regular expression matching, replacing, finding, cutting methods __ Regular expressions

the lookup of a regular expression; mainly used to split () in the String class:

String str;

Str.split (); In the method to intercept by what rule, return a string array

common rules for intercepting:

Str.split ("\.") Follow. to intercept.

Str.split ("") Intercept by Space

Str.split ("cc+") in accordance with the C character intercept, 2 C or more

Str.split ((1) \\.+) in the string containing 2 characters or more places to intercept (1) indicates that the group is 1

Examples of interception:

To intercept in accordance with a group, in two or more places?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16-17

String str = "Publicstaticccvoidddmain"; Reusing a String ragex1= for an expression in a group (.)     \\1+ ";     string[] ss = Str.split (RAGEX1);     for (String st:ss) {System.out.println (ST); //To intercept by two cc+