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How can this final member in a Java class be null?

Sorry, new to Java.
I have a code like this:
public class abc implements xyz {
private final static ABCParameters defaultAbcParameters = ABCParameters.newBuilder()
....
....
.build();
...
...
}
ABCParameters is a google protobuf message, and we have the generated JAVA code for that.
Is there any possibility for defaultAbcParameters to be null? Wouldn't this be initialized when the class gets loaded?
How is this way of initialization different from initializing in the constructor?
Thanks for your time.

Yes, if the builder returns null.
The difference is that your variable is static so it is shared by all the instances of the abc class. If you would initialise in the constructor, then the variable wouldn't be static anymore and it would be one per class instance.

What is the best way to approximate class.getSimpleName() without loading class?

Given a fully qualified class name that can be loaded with Class.forName(), is there a way to transform the name into what would be the result of loading the class and invoking getSimpleName() without actually attempting to load the class?
I need this capability for reflection purposes.

I'm going to say that you can't do it simply based on the name.
You can try to split on . and $, but this example code demonstrates that it is not always obvious where the simple name begins:
class Ideone
{
private static class Bar {};
public static void main (String[] args) throws java.lang.Exception
{
class Foo$o {
class Bar$bar {}
};
class Foo$o$Bar {
class Bar$bar {}
};
class Foo$o$Bar$Bar$bar {}
print(Ideone.class);
print(Bar.class);
print(Foo$o.class);
print(Foo$o.Bar$bar.class);
print(Foo$o$Bar.Bar$bar.class);
print(Foo$o$Bar$Bar$bar.class);
}
private static void print(Class<?> clazz) {
System.out.printf("fqn=%s, sn=%s%n", clazz.getName(), clazz.getSimpleName());
}
}
Output:
fqn=Ideone, sn=Ideone
fqn=Ideone$Bar, sn=Bar
fqn=Ideone$1Foo$o, sn=Foo$o
fqn=Ideone$1Foo$o$Bar$bar, sn=Bar$bar
fqn=Ideone$1Foo$o$Bar$Bar$bar, sn=Bar$bar
fqn=Ideone$2Foo$o$Bar$Bar$bar, sn=Foo$o$Bar$Bar$bar
Ideone demo
i.e. if you were to say "the bit of the name after the final $ or .", you'd be wrong.
The only conclusive way to do this is to load the class, potentially without initializing it:
Class<?> clazz = Class.forName(className, false, someClassLoadeR);

As demonstrated by the answer of #AndyTurner you cannot derive the simple name from the qualified class string in all cases.
But if the constraint without actually attempting to load the class does not forbid to read the contents of the class file, you could do the following (for the edge cases):
Get a InputStream for the class file contents via Class.getResourceAsStream()
Parse the beginning of the class file and read the super class name from the constant pool.
(as commented by #shmosel) Implement the logic of Class.getSimpleName(). The super class name allows you to replace Class.getSimpleBinaryString() which relies on an already loaded class.

Global function or function with no name java for factory pattern

I want to declare a factory class with some methods and attributes that can be used like this:
ClassFactory myObj = MyObj("Class1").method1("input 2");
It seems that this is not a valid JAVA statement because JAVA is fully Object oriented and don't let to declare global function. But if there are a mechanism that let define function without name we can define it as a static function and use it as mentioned above.
Is there any way to implement that in JAVA in that manner or any other way?

You can create a public static method in a class and it can be use globally. For instance a method public static boolean doesWork() { return true; } in a public class named GlobalClass can be accessed by GlobalClass.doesWork() and would return true.

Thanks to Sotirios Delimanolis for Help:
this is possible with defining the static method and import it statically in every where you want.
package factorypakcage;
public class firstFactory{
public static factoryFunction(String className){
//switch case for class creation
}
}
Using like this
import static factorypakcage.firstFactory.factoryFunction;
...
MyClass MyObj = factoryFunction("Class Name");

Pass argument to a static constructor in Java?

I'm trying to initialize a static class, with an argument, and then run some more static code in that class.
I'm aware of the static block, but it seems it can't take any arguments.
Is there a way to pass arguments to a static constructor?
If not, what is the recommended technique to initialize a Static class using an argument?
Edit:
A static class to my understanding is a class which cannot be instantiated (in c# they're called static classes, if Java has a different term for them, sorry for not being aware of it) - it's accessed through it's class name rather than an object name.
What I'm trying to achieve (very simplified) is a class which receives a dictionary as String, parses it, and has methods manipulate it like GetRandomEntry.
Here's an elaborated snippet of my code:
public class QuestionsRepository {
private static Map<String,String[]> easyDefinitions = new HashMap<String,String[]>();
//...
static 
{
// need to receive and parse dictionary here
}
//...
Taking the relevant parts of a code snippet is never easy, hope i have chosen wisely (:
Another detail that may be relevant - I'm a c# programmer, usually. Just Started learning Java lately.
Thanks.

I think you would need to initialize the static fields of the class according to some input. You can do it in the following way by calling the static method of another class:
class ClassToInitialize {
static {
staticField = ParamPassClass.getParameter();
}
private static String staticField;
ClassToInitialize() {
System.out.println("This is the parameter: " + staticField);
}
}
class ParamPassClass {
private static String parameter;
static String getParameter() {
return parameter;
}
static void setParameter(String parameter) {
ParamPassClass.parameter = parameter;
}
}
class Main {
public static void main(String args[]) {
ParamPassClass.setParameter("Test param");
new ClassToInitialize();
}
}

Java doesn't have static constructors. It only has static initializers and static initializers do not take any arguments. It is executed when the class is first loaded, and there is no way to call it yourself.
You either need to use actual objects, or add some way of configuring the class (eg through a static method).

you should mention the member class with a static qualifier, otherwise there is no such a thing as a static class
Here you can find the explanation of using the word 'static' in this context.
Now you should just call its constructor and pass all the arguments you want,
the only restriction that you have on a static member class is that it can't refer the non-static fields of its outer class, it resembles a static methods on class that can't refer the non-static fields of class.
I didn't understand why do you mention a static initialization block here, could you please clarify a little?
Be aware also that in java there is no such a thing as static constructor....
Hope this helps

You can have a static method public static void setUp(Arg1 arg1, Arg2 arg2...) which sets up all your static fields and invoke it when your program starts.
You have to make sure this method will be called only once [or only when you want to reset these fields]

It is not possible to pass arguments directly to the static initializes (JLS:static initializers).
It would be nice if you could share more information about your goals.

You could use an enum to initialize a singleton with a string parameter like this
import java.util.*;
class Data {
static Map<String,String[]> easyDefinitions = new HashMap<String,String[]>();
}
public enum QuestionsRepository
{
repository("primary=red,green,blue;secondary=cyan,yellow,magenta");
QuestionsRepository(String dictionary) {
String[] rules = dictionary.split(";");
for (String rule:rules) {
String[] keyValuePair = rule.split("=",2);
Data.easyDefinitions.put(keyValuePair[0],keyValuePair[1].split(","));
}
}
}

How can a class access its own classname?

I use an java application which generates a class dynamically. Via an ant script the source code will be produced for a give classname and a class template.
In the template for the class I need to know the name of even this class, to call a static method of the class.
Example. The class will be named "VersionInfo". Then in static main() of it I want to call the static method: VersionInfo.getId().
But I don't know the class-name.
Is there an equivalent to "this" for static contexts or some Utility-Class for such a purpose?

If you are creating the class via Ant then why not just generate a static method getClassName that returns the name of the class?

If your main method resides in the same class you just can call getId() in the main method.

So you're saying that it should generate this?
public class VersionInfo{ // VersionInfo class name changes, per problem description
public static void main(){
System.out.println(getId());
// but in the main within the class,we don't need the classname to call a static method
}
public static string getId(){
return "what's the problem?";
}
}
Is there something missing from the description, that you're calling some OTHER class' static method by an unknown-to-the-template name?

There's a nasty workaround:
public static final Class THIS_CLASS = new Object() {
public Class getParentClass() {
return getClass().getEnclosingClass();
}
}.getParentClass();

I'm not sure I understand. If you generate the class VersionInfo yourself, why can't you get the class name from the code that generates the class?

Try this:
package uk.co.farwell.stack_overflow;
public class Test_847708 {
private final static String getId() {
return "string";
}
public static void main(String args[]) {
System.out.println("getId=" + getId());
}
}

You cannot use the key "this" in a static context.
Instead, if you want to call dynamically a static function, you can use java reflection.
I cannot help you further for java reflection because I never use it, but I already use it in .Net and it's a powerful tools.

The cleanest answer to the question might be to make a third class with a static, known, name that is generated by the ANT script which references the dynamic class name, and then have your main method reference that known class.
If for some reason that isn't enough, then combine Joachim Sauer and Melursus answer, and get the class name, and then get the method via reflection:
Method m = THIS_CLASS.getDeclaredMethod("getId", null);
Object result = m.invoke(null, null);