Answers for "how to change an element to a different character in a char array jav"

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"

change string to char array

String myString = "Hello, world!";
char[] myCharArray = myString.toCharArray();

how to covert array into a char

String s="Welcome to Java Programming";
char arr[]=s.toCharArray();
for(int i=0;i<arr.length;i++){
    System.out.println("Data at ["+i+"]="+arr[i]);
}