StringTokenizer a preliminary understanding of string separators

Java.util.StringTokenizer, used to split a string.

1. StringTokenizer (String str): Constructs a StringTokenizer object to parse str.
The default Java delimiter is "space", "tab (' \ t ')", "line feed (' \ n ')", "carriage return (' \ R ')".
2. StringTokenizer (String str, string Delim): Constructs a StringTokenizer object to parse str,
and provides a specified delimiter.
3. StringTokenizer (String str, String Delim, Boolean returndelims):
Constructs a StringTokenizer object to parse str, and provides a specified delimiter,
also specifies whether to return delimiters.

2, common methods.
The static int parseint (String s) represents: This method (parseint) is a class method (static),
The return type is (int), and the method requires a parameter of type string.

1. Int Counttokens (): Returns the number of times the Nexttoken method was called.
If constructors 1 and 2 are used, the number of separators is returned (example 2).
2. Boolean hasmoretokens (): Returns whether there is a delimiter.
3. Boolean hasmoreelements (): Returns whether there is a next element.
4. String NextToken (): Returns the string from the current position to the next delimiter.
5. Object Nextelement (): Returns the object to the next delimiter.

6. String NextToken (String Delim): Returns the next delimiter at the current position.

Public class testofstringtokenizer {        public  static void main (String[] args)  {                     String str = new  String ("java   javascipt   c++ shell   plsql    python ")  ;           str = str  +  "\nhello\nworld"  ;          str =  str +  ", Kiss,my,ass"  ;          // Stringtokenizer st = new stringtokenizer (str, "    ", True);           stringtokenizer st = new stringtokenizer ( STR);      &NBsp;    system.out.println (  "token total: "  + st.counttokens ()  )           while ( st.hasmoreelements ()  ) {           system.out.println ( st.nextToken ()  );           }      }   }

Return Result: Token Total:8

Java javascipt C + + Shell Plsql PYTHON

Hello

World,kiss,my,ass

Counttokens: Returns the number of times the Nexttoken method was called.

The default constructor is used here.

The use of such a child does not return a delimiter.

Public class testofstringtokenizer {        public  static void main (String[] args)  {                     String str = new  String ("Tomorrow,i,will,go,to,school,alone")  ;            str = str +  ", Because,someone,want,to,kiss,my,ass"  ;           //Third parameter: Specifies whether to return a delimiter, the default is false         stringtokenizer st = new stringtokenizer (str, ",", true);           system.out.println (  "token total: "  +  St.counttokens ()  )           while (  St.hasmoreelements ()  ) {           system.out.println ( st.nexttoken ()  );           }      }  }

return Result: Token total:27

Tomorrow,i,will,go,to,school,alone,because,someone,want,to,kiss,my,ass (contains a comma total of 27 calls)

Counttokens: Returns the number of times the Nexttoken method was called.

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StringTokenizer a preliminary understanding of string separators