String assignment

Question

For example :
if : int [] ar={6,7,8}
int k=0;
Then: ar[k]=ar[k+1];

Same scenario in string
If : string str=“678”;
int k=0;
Then: Str.charAt(k)=str.charAt(k+1); // this statement is getting error i.e:unexpected type required: variable
Found : value
Can you please tell me the solution

Answer 1

Yes. String are immutable so you can't change but can create new one and replace old..
One way is: ex: use replace function

String s="78"; k=0;
System.out.println(s) ;
s=s.replace(s.charAt(k),s.charAt(k+1));
System.out.println (s) ;

Otherway, convert to equalent char array by
char ch[] = s.toCharArray();
Now, you can do modifications with indexes, like you mentioned for integers..
Reform string by loops or
use s= String.valueOf(ch);

Answer 2

Hi. String in java is immutable. You should consider using StringBuilder class that has method setCharAt for this purpose.

Answer 3

thnq i jayakrishna garu
i got the code