create string separeted by comma java code example

Example 1: comma in java variable

int index = -1, i;//What is this type of declaration
// Nothing but 
int index = -1
int i;

String s = "hi",stri; //What is this type of declaration
// Nothing but 
String s = "hi";
String stri;

Example 2: separate string by comma java

String names = "prappo,prince";
String[] namesList = names.split(",");