how to store chars in an array from a string java code example

Example 1: java string to char array

String str = "example";
char[] ch = str.toCharArray();

Example 2: java put a char array into a string

char[] arr = { 'p'," ",'q', 'r', 's' };
      String str = String.valueOf(arr);
      System.out.println(str);//"p qrs"