Integer to String conversion methods

Question

What are the alternative methods for converting and integer to a string?

possible duplicate of How to convert from int to String?

Sachin Jain
– Sachin Jain

2014-03-06 06:51:41 +00:00
Commented Mar 6, 2014 at 6:51 — Sachin Jain
– Sachin Jain, Commented Mar 6, 2014 at 6:51

oezi · Accepted Answer · 2010-09-27 10:00:51Z

10

Integer.toString(your_int_value);

or

your_int_value+"";

and, of course, Java Docs should be best friend in this case.

edited Sep 27, 2010 at 10:00

oezi

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answered Sep 27, 2010 at 9:57

sfaiz

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4 Comments

Vivien Barousse Over a year ago

your_edit_value + ""; causes the allocation of an extra empty string object, call Integer.toString(your_int_value) and concatenates both of them. 3 strings allocations where the first statement requires only one. The first one is faster.

Sean Patrick Floyd Over a year ago

the seoncd version is awful. Java is not PHP or JavaScript.

Tadeusz Kopec for Ukraine Over a year ago

Implicit conversion to String has a big downside. val1 + val2 + "" is very different from "" + val1 + val2

sfaiz Over a year ago

yes, totally agree value+""; is not a good approach. i was just trying to mention different ways of doing that.

Sean Patrick Floyd · Accepted Answer · 2010-09-27 10:29:14Z

4

Here are all the different versions:

a) Convert an Integer to a String

Integer one = Integer.valueOf(1);
String oneAsString = one.toString();

b) Convert an int to a String

int one = 1;
String oneAsString = String.valueOf(one);

c) Convert a String to an Integer

String oneAsString = "1";
Integer one = Integer.valueOf(oneAsString);

d) Convert a String to an int

String oneAsString = "1";
int one = Integer.parseInt(oneAsString);

There is also a page in the Sun Java tutorial called Converting between Numbers and Strings.

answered Sep 27, 2010 at 10:29

Sean Patrick Floyd

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Comments

Thomas Lötzer · Accepted Answer · 2010-09-27 09:54:55Z

3

String one = Integer.toString(1);

answered Sep 27, 2010 at 9:54

Thomas Lötzer

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Comments

fredley · Accepted Answer · 2010-09-27 09:55:10Z

3

String myString = Integer.toString(myInt);

answered Sep 27, 2010 at 9:55

fredley

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Comments

Emil · Accepted Answer · 2010-09-27 09:56:30Z

2

String.valueOf(anyInt);

answered Sep 27, 2010 at 9:56

Emil

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Michał Niklas · Accepted Answer · 2010-09-27 09:58:23Z

2

There is Integer.toString() or you can use string concatenation where 1st operand is string (even empty): String snr = "" + nr;. This can be useful if you want to add more items to String variable.

answered Sep 27, 2010 at 9:58

Michał Niklas

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1 Comment

Michał Niklas Over a year ago

I think both are useful. Example: if you want to convert some number to string in loop then you can use new_name = old_name + i + ".txt" or new_name = old_name + Integer.toString(i) + ".txt". In this case I prefer shorter method.

user2675678 · Accepted Answer · 2013-08-17 18:27:17Z

0

You can use String.valueOf(thenumber) for conversion. But if you plan to add another word converting is not nessesary. You can have something like this:
String string = "Number: " + 1
This will make the string equal Number: 1.

answered Aug 17, 2013 at 18:27

user2675678

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