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

Example 1: 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"

Example 2: array of char to string in java

String x2 = "hello";
String newSortedString = "";
Object[] y = x2.toLowerCase()
                .chars()
                .sorted()
                .mapToObj(i -> (char) i)
                .toArray();

for (Object o: y) {
  newSortedString = newSortedString.concat(o.toString());
}

System.out.println(newSortedString);