StringTokenizer: String delimited parsing type
1. Constructor.
1. StringTokenizer(String str): Construct a StringTokenizer object for parsing str. The default delimiters in java are "space", "tab ('\t')", "newline ('\n')", "carriage return ('\r')".
2. StringTokenizer(String str, String delim): Construct a StringTokenizer object for parsing str and provide a specified delimiter.
3. StringTokenizer(String str, String delim, boolean returnDelims): Construct a StringTokenizer object for parsing str, and provide a specified delimiter, and at the same time, specify whether to return the delimiter.
Second, the method.
Description:
1. All methods are public;
2. Writing format: [modifier] <return type> <method name ([parameter list])>
such as:
static int parseInt(String s) Indicates: this method (parseInt) is The class method (static), the return type is (int), and the required parameters of the method are String type.
int countTokens() ：返回nextToken方法被调用的次数。如果采用构造函数1和2，返回的就是分隔符数量(例2)。
boolean hasMoreTokens() ：返回是否还有分隔符。
boolean hasMoreElements() ：结果同2。
String nextToken() ：返回从当前位置到下一个分隔符的字符串。
Object nextElement() ：结果同4。
String nextToken(String delim) ：与4类似，以指定的分隔符返回结果。