Have a question about convert int to string

[chang nanny]

Hello,
int x = 1;
String sx = (String)x;
The preceding code compile error.
Why can't use "(String)" to cast?
Thank you.

[Ashok C. Mohan]

int is a primitive data type,whereas String is an object.A cast from a primitive to an object does not make sense.Inorder to perform conversions like this,java provides a wonderful set of classes called wrapper classes.The wrapper class objects wraps around primitives to make them behave similar to objects.The conversion you tried can be done like this....

  
int x=1;
Integer ix=new Integer(x);
String sx=ix.toString();

Hope this helps...

[Brian Pipa]

This works too:

  
int x = 1;
String sx = Integer.toString(x);

Brian

[Eddie Vanda]

String.valueOf (2);

The valueOf method in String can take any primitive value, no wrapper class required!

[Tom Boyce]

But the easiest way to convert an int to a String is:
int x = 1;
String sx = (x+"");
by concatenating any primitive with an empty string you cast it as a String
double y = 1.2;
String sy = (y+"");
Other casting examples:
public class Conversions
{
public static void main(String[] args)
{
String strQuantity = "5"; //simulating the customer has entered 5 into a text field
//to perform a calculation, string must be converted to an int.
int quantity = Integer.parseInt(strQuantity);
String strPrice = "25.5";
double price = Double.parseDouble(strPrice);
//perform a calculation
double total = quantity*price;
//convert total to a string
String strTotal=total+"";
System.out.println(strTotal);
}
}
Tom Boyce