Prevent Int from changing 012345 to 5349

Question

Possible Duplicate:
Integer with leading zeroes

The program I am coding requires me to label an item with an inventory number of 012345 and store it in a int variable.

This is a stripped down example of what I am doing:

int test = 012345;
System.out.println(test);

this prints as:

5349

How do I get it to print out as 012345 rather than 5349?

EDIT: I am entering this into the parameter of a constructor for a custom class i am initializing. Then I use a method to return what the current number is, then print it to the terminal window.

Answer 1

You get a wrong number because when you prepend zero to an integer literal, Java interprets the number as an octal (i.e. base-8) constant. If you want to add a leading zero, use

int test = 12345;
System.out.println("0"+test);

You can also use the formated output functionality with the %06d specifier, like this:

System.out.format("%06d", num);

6 means "use six digits"; '0' means "pad with zeros if necessary".

Answer 2

As already said, int value with leading zero is considered as octal value. If you don't need to have test as int, why not make it string? Like

String test= new String("012345");

And if you want to use int for test, you can do not prepend 0, rather just use the number and prepend 0 at the time of printing.

In case if you're wondering how will you find how many leading zero are to be prepended, you may do like this

int lengthOfItemID=6;
int test=12345;
String test1=new String("000000"+test);
System.out.println(test1.substring(test1.length()-lengthOfItemID));

Pardon syntax mistakes, been years I last worked with java.

Answer 3

You can get the right result by using Integer.parseInt. That will make your string into a decimal string. (found here). The JAVA API here states that it takes a string and returns a signed decimal.