the * override of String Equals method: The string is compared to the content, not the address value. * 1:public Boolean Equalsignorecase (String anotherstring) compares the contents of two strings, ignoring case * 2:public Boolean contains (charsequence s) determines whether the string that invokes the method contains the passed-in string * Directly as a public Boolean contains (string s). * Charsequence: Character sequence * string is a subclass of charsequence, so it can be written in the following form. The string can be passed in wherever the Charsequence type is received. * Charsequence cs = new String ("abc"); Multi-State! * 3: * Public boolean StartsWith (string prefix) starts with a string * public boolean endsWith (string suffix); Ends with a String * public boolean StartsWith (String prefix,int offset) starting at the specified position, beginning with a String * * 4:public Boolean isemp Ty () determines whether the string is empty (judging by the number of characters in the string, or 0, returns True)
* 1:public int Length () of the string class gets the << method of lengths!! >> Get length << properties when array!! >> * 2:public char charAt (int index) returns the character based on index * 3: * public int indexOf (int ch) returns index based on content (character) returns the first occurrence of the position * public int indexOf (String str) returns an index based on the contents (strings) returns the first occurrence of the position * public int lastIndexOf (int ch) returns an index based on content (character) returns the last occurrence of the position * public int lastIndexOf (String str) returns an index based on the contents (strings) returns the last occurrence of the position * 4: * public string substring (int beginindex) returns a new string.! Old string no changes!! Intercepts from the specified index to the last * including the starting index! * public string substring (int beginindex,int endIndex) returns a new string.!! Old string no changes!! * Start from the specified index to the end of the index *!! Contains the head does not contain the tail!!
* 1:public char[] ToCharArray () converts a string into a corresponding character array * 2:public byte[] getBytes () Use the default way to convert a string to a corresponding byte array * 3: Rewrite Tostrin The G method no longer returns the string that the address value is spelled in instead of returning the string itself * 4:public static string copyvalueof (char[] data) give me a character array, also you a string * 5:public static Strin G ValueOf (Xxx xx) give me an arbitrary object, turn it into a string * 6: * public string toLowerCase () large to small * public string touppercase () Small to large * 7:PUBL The IC string concat (String str) connects the specified string to the end of this string.
* 1 of the String class:replace (char OldChar, char Newchar) give me the old character, give me the new character, I replace the old character in the string with the new character. Replace character* Public string replace (charsequence target, charsequence replacement) Replacement String * Understood as public string replace (string old string, Strin G new String) * * 2:public string trim () returns a copy of the string, ignoring leading and trailing blanks. To remove from the front and back blanks * * 3:public string[] Split (string regex) splits this string based on the match of the given regular expression. That is, the given character cuts the string into a corresponding number of small strings * public int
* StringBuffer: variable character sequence. A string buffer. A container that is used to stitch strings. * * StringBuffer Construction Method: * Public StringBuffer (String str) creates a string buffer that is given a string directly within the buffer * Public stringbuffer () creates an empty string buffer * 1:public stringbuffer (int capacity) Specifies the capacity to create a string buffer * * StringBuffer Common method: * 2:public stringbuffer append (xxx xxx) Str Ingbuffer can append any type by Append Method! * Note: When added, if the capacity of the container is exceeded, the capacity is automatically incremented * 3:public int capacity () returns the container capacity * 4:public int length () return length (number of characters already stored)
* StringBuffer Other methods: * 1:public stringbuffer append (xxx xxx) append content * 2:public stringbuffer insert (int index,xxx Xxx) Insert Content * Note chained programming: When the method returns an object, you can use the object directly to continue calling the method. Repeat the action for the chained call.
* 1:public stringbuffer Delete (int start, int end) deletes the string within the specified range contains the header does not contain the tail * 2:public stringbuffer deletecharat (int index) Removes the character at the specified index position * 3:public stringbuffer replace (int start,int end, string str) replaces all content within the specified range with a new string contains the header does not contain the tail * 5:public Stringbu Ffer reverse () flip content * Generally, in Java, the first and the end of the index, is the inclusion of the head does not contain the tail * * 4:string (byte[] bys,int startindex,int count); The construction parameter of string does not have two indexes! Count is the number of take!
String: Class of strings
