Question

In my coding various places i need to change integer values to string values. To convert the cast integer to string i use concatenation with “” to integer.

i found an another way that is using String.parseInt(..); method.

my question is i do not know which is optimized method to do casting in java and how it is optimized?. is there any other way to cast except my code?

my sample code:

int total = mark1 + mark2;
String str_total = ""+total;  // currently doing.

…….

String str_total = String.parseInt(total);  // i am planning to do.

Answer 1

You can also use –

String str_total = String.valueOf(total); 

OR

Use Integer rahter than int in your code and then use toString() on Integer like

Integer total = mark1 + mark2;
String str_total = total.toString();

In your code –

String str_total = “” + total;

Actually you are creating 2 new string objects first for "" and second str_total

but in my code only one new string object will be created.

Implementation of valueOf in String class is as follows –

   public static String valueOf(int i) {
        return Integer.toString(i);
    }

here toString will create a new String object