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Have a question about convert int to string

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

Hope this helps...
 
Ranch Hand
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This works too:

Brian
 
Ranch Hand
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The valueOf method in String can take any primitive value, no wrapper class required!
 
Greenhorn
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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
 
Don't get me started about those stupid light bulbs.
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