String.valueOf(x) of common methods of String
1. Function
String.valueOf() is a static method that converts various types of data into string types. This method can convert a Boolean value, a character, a set of character arrays, an integer, a long integer, a floating-point number, a double-precision floating-point number, an Object object, and various other types of data to a string. For example, for an integer x, you can use String.valueOf(x) to convert it to a string.
Two, example
Convert a character type value to a String type value
Character x = 'a';
String value = String.valueOf(x);
System.out.println(value);