• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Jeanne Boyarsky
  • Tim Cooke
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Carey Brown
  • Frits Walraven
Bartenders:
  • Piet Souris
  • Himai Minh

simple question

 
Ranch Hand
Posts: 33
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hi ,

class JSC201 {
static byte m1() {
final char c1 = '\u0001';
return c1; // 1
}
static byte m2(final char c2) {return c2;} // 2
public static void main(String[] args) {
char c3 = '\u0003';
System.out.print(""+m1()+m2(c3)); // 3
}}


i understand why i'm getting the error on line no 2 cause the found return value is character and the return type is byte


but shouldn't i get the complile time error at line 1 also cause it is also
returning the character value even though the return type is byte....
[ September 05, 2007: Message edited by: deeksha mehra ]
 
Ranch Hand
Posts: 188
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hi deeksha..

you are right. you should get a compiler error there also
 
Ranch Hand
Posts: 71
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
No, line 1 compiles fine. The variable is char but it is a final that is assigned a literal, so it is resolved at compile time. Java knows that the return value cannot be any other than \u0001, or 1. And so it knows that it fits a byte.
Change that value to \u0101 and you will see it won't compile, because it knows the return value doesn't fit a byte.
 
please buy this thing and then I get a fat cut of the action:
free, earth-friendly heat - a kickstarter for putting coin in your pocket while saving the earth
https://coderanch.com/t/751654/free-earth-friendly-heat-kickstarter
reply
    Bookmark Topic Watch Topic
  • New Topic