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Java Class Q&A » constant » compile 

1. Is Java guaranteed to inline string constants if they can be determined at compile time    stackoverflow.com

Consider this case:

public Class1 {
   public static final String ONE = "ABC";
   public static final String TWO = "DEF";
}

public Class2 {

  public void someMethod() {
  ...

2. Java enum : Refactoring switch statements 'constant expression required' compile error?    stackoverflow.com

I have a class declaring constants for my app

public class GroupConstants {
    ..
    public static final int INTEGER_VALUE = 1;
    public static ...

3. Why doesn't a Java constant divided by zero produce compile time error?    stackoverflow.com

Possible Duplicate:
Is 1/0 a legal Java expression?
Why does this code compile?
class Compiles {
    public final static int A = 7/0;
  ...

4. why case constant must be compile time constant in switch    stackoverflow.com

why case constant must be compile time constant in switch?

5. Java switch constant expression... Is there any clever way to get this to compile?    stackoverflow.com

I'm returning to Java dev after many years away from it. Is there anyway to get this code to compile?

class Mpeg4
    {
    public static final ...

6. compile time constants    coderanch.com

7. Compile Time Constant    coderanch.com

Here is some info I found that should be helpful. A compile-time constant is a value that can be (and is) computed at compile-time. A runtime constant is a value that is computed only while the program is running. If you run the same program more than once: A compile-time constant will have the same value each time the application is ...

8. compile time constant?    coderanch.com

It means that since the value is known to be constant (and thus unchangeable) at compile time, the compiler is free to insert its value wherever it is referenced. This means that, whenever you change the value, you need to forcibly recompile all classes that reference it, because the compiler will not pick up on that. A runtime constant, on the ...

9. Compile time constant ?    coderanch.com

hi, Is there a difference between a constant and a compile time constant in Java(correct me if i am wrong). What makes me think like this is this code. final int i = 90; byte b = i ; compiles ane runs fine. where as final int i; i = 90 ; byte b = i ; doesn't compile only. Your ...

10. Case constant must be compile time constant?    coderanch.com

In a switch statement such as the following: final CONSTANT = 10; int x = 2; int y = 3; int z = x + y; switch (x) { case CONSTANT: System.out.println("A"); break; case CONSTANT + 10: System.out.println("B"); break; } z is a variable, and you can switch on it. CONSTANT is a constant, so you can case on it. CONSTANT ...

11. compile time constant.    coderanch.com

12. compile time constants    coderanch.com

Can anyone tell me what is compile time constant. if i declare a final variable like this final int i=5; This is a compile time constant and if i declare like this final int i; i=5; this is not a compile time constant I want to understand what is a difference between above two intialization of final variables.

13. How to identify compile time constants    coderanch.com

14. What is a compile time constant?    coderanch.com

4.12.4 final Variables A variable can be declared final. A final variable may only be assigned to once. It is a compile time error if a final variable is assigned to unless it is definitely unassigned (16) immediately prior to the assignment. [BLAH BLAH BLAH] We call a variable, of primitive type or type String, that is final and initialized with ...

15. Java compile time constants confusion    coderanch.com

Firstly, I'd like to thank Henry Wong for his piece on this subject ( see the forum FAQ if you haven't seen it ). I still have a few issues with this subject though. I should explain that there seems to be some incorrect or out of date info on Java constants on the web, which increases the confusion level. So ...

17. Assinging Compile time long constant to byte fails    coderanch.com

Hi, I am aware that if you are assigning int to a byte without any implicit cast, then the int should be a compile time constant and value should be in byte range. i.e. the below code compile fines. final int b = 10; byte a = b; // compiles fine But if I try the same thing with long, it ...

18. The strange ways of compile time constants    coderanch.com

It may be easy for a human being to spot that the last two code examples are identical, but it's not so easy for a compiler. You could make its analysis of which code will definitely be executed (or which won't) as complex as you want, and it will still miss opportunities for proving that some code can't be reached. It ...

19. What is the "Compile time constant" norm for a switch case constant ?    forums.oracle.com

A compile-time constant expression is an expression denoting a value of primitive type or a String that does not complete abruptly and is composed using only the following: * Literals of primitive type and literals of type String (3.10.5) * Casts to primitive types and casts to type String * The unary operators +, -, ~, and ! (but not ++ ...

20. compile time constant    forums.oracle.com

21. constants v/s compile time constants.    forums.oracle.com

Hi to all. I got a problem in understanding compile time constants. I was reading about switch statement, and found a fact: the case constant in switch statement should be compile time constant. and example they have given is: final int a=1; final int b; b=2; int x=0; switch(x) { case a: //ok. case b: //compiler error. } so is it ...

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