Creating and initializing string methods in Java

1, using string constants to directly initialize string s= "hello!";

2. Use the constructor to create and initialize String ();//Initialize an object to represent a sequence of empty characters

string (value);//Create a new object with a string constant that already exists

String (char[] value);//Use a character array to create a string

String (char[] Value,int offset,int count);//intercept character array offset to count character create a non-empty string

String (stringbuffer buffer);//Initialize string object with StringBuffer object