Java - Convert integer to string [duplicate]

Given a number:

int number = 1234;

Which would be the "best" way to convert this to a string:

String stringNumber = "1234";

^{I have tried searching (googling) for an answer but no many seemed "trustworthy".}

Solution 1:

There are multiple ways:

• String.valueOf(number) (my preference)
• "" + number (I don't know how the compiler handles it, perhaps it is as efficient as the above)
• Integer.toString(number)

Solution 2:

Integer class has static method toString() - you can use it:

int i = 1234;
String str = Integer.toString(i);

Returns a String object representing the specified integer. The argument is converted to signed decimal representation and returned as a string, exactly as if the argument and radix 10 were given as arguments to the toString(int, int) method.

Solution 3:

Always use either String.valueOf(number) or Integer.toString(number).

Using "" + number is an overhead and does the following:

StringBuilder sb = new StringBuilder();
sb.append("");
sb.append(number);
return sb.toString();