Java programming notes 5: stringbuffer and stringtokenizer

Character character The character class is used to store and operate a single character value, once character If an object is created, it cannot be changed.   Constructor Summary Character(Char value) Constructs a new character object to represent the specified char value. Common Methods: Int Compareto(Character anothercharacter) Compare two character Objects Based on numbers. Boolean Equals(ObjectOBJ) Compare this object with the specified object. String Tostring() Returns a String object that represents the character value. Char Charvalue() Returns the value of this character object.   4. String tag class stringtokenizer The string class provides the split method to separate strings and return a string array. In fact, there is a special string tag class stringtokenizer used to separate strings in Java. Constructor Summary Stringtokenizer(String Str) Constructs a string tokenizer for the specified string. Stringtokenizer(String STR, string delim) Constructs a string tokenizer for the specified string. Stringtokenizer(String STR, string delim, Boolean returndelims) Constructs a string tokenizer for the specified string. Delim is the delimiter. Method Summary Int Counttokens() Count the number of times the tokenizer nexttoken method can be called before an exception is generated. Boolean Hasmoreelements() Returns the same value as the hasmoretokens method. Boolean Hasmoretokens() Test whether there are more available tags in the tokenizer string. Object Nextelement() Except that the declared return value is an object rather than a string, it returns the same value as the nexttoken method. String Nexttoken() Returns the next tag of the string tokenizer. String Nexttoken(String delim) Returns the next tag in the string of this string tokenizer. Pay attention to the return type. Refer to: Java getting started and improving, Chapter 5 string processing, read the code examples, and sort out common methods.