Method 1

int I = 10；

String s = ""+i;

This is a transformation by using the toString mechanism of java. When any type adds a String, it will be converted to a String first.

Method 2

int I = 10；

string s = string . value of(I)；

This is a transformation using the factory method provided by the String class.

Suggest using the second method, which is much more efficient ~