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  Questions about Java4k Code  (Read 1190 times)
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Offline Oskuro

JGO Knight


Medals: 39
Exp: 6 years


Coding in Style


« Posted 2014-05-16 10:58:12 »

Hi there,

Recently I've been looking up some more Java4k sources for fun, and have noticed a common pattern that I don't fully understand.

Namely, people seem to declare all their variables and constants within the run() method, rather than at the class level. Meaning this:

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public class Classy
{
  public void run()
  {
      final int CONSTANT = 0;
      int VARIABLE = 1;

      // etc...
 }
}


Instead of this:

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public class Classy
{
  private final int CONSTANT = 0;
  private int VARIABLE = 1;

  public void run()
  {
      // etc...
 }
}


I was wondering if there is an actual performance/memory reason for this, or if simply people develop their Java4k games within a single method and just paste it into a standard class skeleton.

Offline Abuse

JGO Knight


Medals: 12


falling into the abyss of reality


« Reply #1 - Posted 2014-05-16 11:12:01 »

A class member requires a constant pool entry, and larger bytecode to access.

That said, once obfuscated these two are equivalent:

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static final int a = 0;
run() {
final int b = 0;
}

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Offline Oskuro

JGO Knight


Medals: 39
Exp: 6 years


Coding in Style


« Reply #2 - Posted 2014-05-19 13:34:38 »

Thanks!

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