I imagine that no, they aren't, because every process has its own memory space, of course.
But how does the whole JVM thing actually work? Is there a separate JVM in a ... |
In Clojure I can look up a static member of a Java class (e.g. a field holding a constant) like this:
ClassName/CONSTANT_FIELD
How can I access the member when I only know it's ... |
I need to implement a B-Tree for University:
I have an "outer" class B-Tree with attributes root and _degree. The class to represent the nodes is implemented as a static-member class:
public class ...
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I am developing a web application using Java/JSP.
One class, say Student, has a static member
static private int _nextID;
I want to know, if this _nextID is the same among all user ... |
So I have a question regarding best practices. Basically I'm doing the following to make accessing members of different classes easier:
class myClass1 {
public static int var1;
public static String var2; ...
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I am having some issues with throwing static member classes, as the title suggests. But I'm not sure if that's the problem, and the compiler gives me mixed signals as to ... |
I have a class Cache which picks up List<SomeObject> someObjectList from DB and stores it in static variable.
Now I have another thread A which uses this List as follows
class A extends ...
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If I have a Class object of a "static" class (all members are static) at runtime and I know the superclass at compile time, is there a syntax to directly access the static members of the class using the Class object? For example, here is a non-direct way to reference the members: Class myclass = arMyStaticClasses[2]; Field fld = myclass.getField("mystringfield1"); // ... |
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Hi, the Class objects you're talking about are somewhat special. They are dynamically created by the class loader in the JVM of an application at runtime the first time a class is used (take care of upper case names: Class is the class named "Class"). The ".class" language construct is neither a static member of Object nor of Test. It's a ... |
I have read that "A member variable of a class is created when the instance is created." (The Complete Java Certification Study Guide, Simon Roberts et.al., pg 15). and "In the class body are the declarations of the members of the class. These include fields(variables), methods, static initializers, and constructors." (Exam Cram, pg 61) Now! In reference to variables, are member ... |
GBTest1 works for non-static member classes. It can invoke contentsMethod() via parcelMethod() or directly from main. Now lets make Contents into a static member class : 1. static class Contents { } 2. private static String parcelContents = "books" ; Compile - Java does not like new Contents() , get rid of new. Compile - Java thinks .Contents() is a method ... |
You could accomplish this using reflection, up to a point. Using java.lang.Class#getDeclaredFields() you can retrieve an array of Field objects, which represent fields declared by that class (excluding inherited fields). If you loop over this array you could use the java.lang.reflect.Field#getModifiers() method to determine which modifiers accompany the field. By making use the public constants defined by the java.lang.reflect.Modifier class and ... |
Hi folks, Here i have a doubt regarding java 5.0 static imports feature. Suppose i have two classes Test1 and Test2 which contains static member variable with the same name "NAME" of type String. If i import it like... Import com.test.Test1.*; Import com.test.Test2.*; Public class TestMain { System.out.println(NAME);//here i am expecting the NAME variable from Test1 System.out.println(NAME);//here i am expecting the ... |
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I am reading a book and there is a listing in it with this code in it: Java Code: import java.util.concurrent.*; import java.util.concurrent.locks.*; public class AccountWithSyncUsingLock { private static Account account = new Account(); public static void main(String[] args) { ExecutorService executor = Executors.newCachedThreadPool(); // Create and launch 100 threads for (int i = 0; i < 100; i++) { executor.execute(new ... |
If you're just using it as a flag, then define a marker interface and have the class scanning part look for that. You don't need the Constructor interface (except for getName, for which you should probably define a differently named interface) -- just let the factory call newInstance(). You may be protesting "but what if the subclass doesn't have a no-arg ... |
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Thinking in Java, 4th edition, p 232: ... if you don't put an access specifier for class access, it defaults to package access. ... However, if a static member of that class is public, the client programmer can still access that static member even though they cannot create an object of that class. I can't find anything in th JLS which ... |
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