[Javase] Basic type (string dependent)

The string is a special object

Once the string is initialized, it cannot be changed.

Gets the length of the string

Call the length () method of the String object to return int lengths

Gets the character of an index position

Call the charAt () method of the String object to get the char character, parameter:int Index of type

Gets the index position in the string based on the character

Call the indexOf () method of the String object to get the first occurrence of the int index position, return -1 Just doesn't exist, argument: String Type

Gets the substring, according to the index

Call the substring () method of the String object , Parameter:typeint to start index

Determine if a string has content

Call the IsEmpty () method of the String object to get the Boolean value

Determine if the string contains another string

Call the contains () method of the string object to get the Boolean value, Parameter:string object

Converting basic data types into strings

Call string.valueof (), Parameters: base data type

Convert a string into a character array

Call the ToCharArray () method of the String object to get the byte array

Converting a string into a byte array

Call the getBytes () method of the String object to get the byte[] byte array

Converts a string to a string array, followed by the specified character

Call the split () method of the string object , parameter:string

Replace string

Call the replace () method of the string object , parameter: old string, new string

 Public classStringdemo {/**     * @paramargs*/     Public Static voidMain (string[] args) {String name= "Taoshihan Taoshan"; System.out.println (Name.length ());//OutputSystem.out.println (Name.charat (9));//Output PotterySystem.out.println (Name.indexof ("Tao"));//Output 9System.out.println (name.substring (9));//Output TaoshanSystem.out.println (Name.contains ("Shi"));//Output TrueSystem.out.println (string.valueof (1));//Output 1System.out.println (Name.tochararray ());//Output Taoshihan TaoshanSystem.out.println (Name.getbytes ());//output [[email protected]System.out.println (Name.split ("n"));//Output [Ljava.lang.string;@77a477b7System.out.println (Name.replace ("Han", "Han"));//output Taoshi Culvert Taoshan    }}

PHP version, full correspondence

<?PHP$str= "Taoshihan Taoshan";EchoMb_strlen ($str, "Utf-8");//OutputEcho $str{8};//output N; This method is garbled in Chinese, there is no similar charat () method in PHPEcho Strpos($str, "Tao");//Output 9EchoMB_SUBSTR ($str, 9);//Output TaoshanEcho strstr($str, "Shi");//Output Shihan TaoshanEcho(string) 1;//output 1//php No string to character array self-band method//php no string to byte array self-band methodPrint_r(Explode("N",$str));//output Array ([0] = Taoshiha [1] = Taoshan)Echo Str_replace("Han", "Han",$str);//output Taoshi Culvert Taoshan

[Javase] Basic type (string dependent)