Java String StringBuffer

Conversion of StringBuffer to string

1. Convert StringBuffer to String--stringbuffer class member The ToString function to convert it to a string type. Examples are as follows:

StringBuffer StringBuffer = new StringBuffer ("Hello World");

String C = stringbuffer.tostring (); Call the ToString function to convert a StringBuffer object to a String object

2. Convert String to StringBuffer

Method One: Using the constructor function

String str= "Hello world.";

StringBuffer buffer = new StringBuffer (str);

Mode two: Call the Append function

String str= "Hello world.";

StringBuffer buffer2 = new StringBuffer ();

Buffer2.append (str);

Conversion of string to character array

1. Convert a string into a character array--string class member ToCharArray function converts it to a character array. Examples are as follows:

String c = "Hello world"; /Create a String object

char[] cd = C.tochararray ();//re-call the ToCharArray function of the string object into a word

2. Converting a character array into String--java provides two ways to convert a character array directly to a string.

Method 1: Use the constructor of the string class to complete the transformation directly when the string is constructed.

char[] data = {' A ', ' B ', ' C '};

String str = new string (data);

Method 2: Call the ValueOf function transformation of the string class.

String str = string.valueof (char[] ch);

Converting StringBuffer to character arrays

1. Converting stringbuffer into character array--java does not support direct conversion from stringbuffer to character arrays. Instead, the StringBuffer is converted to a string, and then the ToCharArray function is converted to a character array by a string call. The conversion example is as follows:

StringBuffer StringBuffer = new StringBuffer ("Hello World");

String C = stringbuffer.tostring (); Convert a StringBuffer object to a String object first

char[] cd = C.tochararray (); Re-invoking the ToCharArray function of the string object into a character array

2. Converting a character array to stringbuffer--is similar to converting a stringbuffer into a character array, you need to convert the character array to a string and then convert the string to StringBuffer.

char[] data = {' H ', ' e ', ' l ', ' l ', ' o ', ' d '};

String str = new string ();

str.valueof (char[] ch); Call the valueof function of the string class to convert a character array into a string

StringBuffer buffer = new StringBuffer ();

Buffer.append (str); Call the Append function to convert a string into StringBuffer

Java String StringBuffer