Re: Dose java have the concept of scalar context as perl?

Chris Dollin <>
Tue, 01 May 2007 09:21:38 +0100
Jack Dowson wrote:

Hello Everyone:
      I'm new to java.I'm now confused by the output of the following two

        The first example:
import java.util.*;
class UtilCalender{
      public static void main(String[] args){
              Calendar c = Calendar.getInstance();
              System.out.println("current date: ");
              System.out.println("Year: " +c.get(c.YEAR));
              System.out.println("Month: " + (c.get(c.MONTH)+1));
              System.out.println("Day: " + c.get(c.DAY_OF_MONTH));
      And the result is:
current date:
Year: 2007
Month: 5
Day: 1

      The second example:
import java.util.*;
class UtilCalender1{
      public static void main(String[] args){
              Calendar c = Calendar.getInstance();
              System.out.println("current date: ");
              System.out.println(c.get(c.YEAR) + (c.get(c.MONTH)+1)
      And the result is:
current date:

      What leads to the different output?

`c.get()` is returning integers, which your second example adds together
before printing. There are multiple `println`s, distinguished by the
compile-time type of their argument; the one with an integer argument
prints integers in the usual way. In your first example, the `+` is
adding strings to things by converting the things to strings (someone
please write the tune for this); `+` has a somewhat horrible overloading
to allow this.

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