java keeps changing the first zip code

I dont get why when i compile this code i get the incorrect zip code.

John Smith
486 test St.
Yahoo, MA 898 - 2597JohnSmith
486 test St.
Yahoo, MA 898  2597

Code

public class test
{
  public static void main(String[] args) {

      String firstName = "John";
      String lastName = "Smith";
      int streetNumber = 486;
      String streetName = "test St.";
      String city = "Yahoo";
      String state = "MA";
      int zip =  01602;
      int zipplus4 = 2597;


     System.out.print(firstName + " " + lastName + "\n" + streetNumber + " " + streetName + "\n" + city + ", " + state + " " + zip + " - " + zipplus4);

     System.out.println(firstName + lastName);
     System.out.println(streetNumber + " " + streetName);  
     System.out.println(city + ", " + state + " " + zip + " - " + zipplus4);  

    }

   开发者_如何学运维 }

When you specify a number with a leading zero, it gets treated as an Octal (base-8, as opposed to decimal base-10 or hexadecimal base-16).

01602 octal == 898 decimal

Since Java wasn't desgined with Zip codes in mind, to get the desired effect, drop the leading zero, and format it when you print it:

System.out.println(city + ", " + state + " " + new java.text.NumberFormat("00000").format(zip) + " - " + new java.text.NumberFormat("0000").format(zipplus4));  

Make those zip codes String instead of int and it'll be fine.

public class test
{
    public static void main(String[] args)
    {

        String firstName = "John";
        String lastName = "Smith";
        int streetNumber = 486;
        String streetName = "test St.";
        String city = "Yahoo";
        String state = "MA";
        String zip = "01602";
        String zipplus4 = "2597";


        System.out.print(firstName + " " + lastName + "\n" + streetNumber + " " + streetName + "\n" + city + ", " + state + " " + zip + " - " + zipplus4);

        System.out.println(firstName + lastName);
        System.out.println(streetNumber + " " + streetName);
        System.out.println(city + ", " + state + " " + zip + " - " + zipplus4);

    }
}

Outcome:

John Smith
486 test St.
Yahoo, MA 01602 - 2597JohnSmith
486 test St.
Yahoo, MA 01602 - 2597

Process finished with exit code 0

I'd also advise you to encapsulate those into sensible objects. Why deal with String primitives when you can use an Address class? Java's object-oriented; better to think in terms of objects.

01602 - this 0 at the beginning means you are using octal rather than decimal numbers. Remove it and you'll be fine :-).

BTW IntelliJ IDEA even displays warning here.

You should use String type for zip and zipplus4.

If you cannot change the type then you can use the following in your println statement

String.format("%05d", zip)

Take off the leading zero~ or make it a string

A Zipcode shouldn't be stored in a numeric datatype because it isn't really something you wnat to do math on, instead store it as a String and it'll work fine.