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−-*- outline -*-
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−
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−* Class version.
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−
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−See value of 6 and 8 bytes in .class file:
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−
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−  {0xCA, 0xFE, 0xBA, 0xBE, 0x00, minor, 0x00, major}
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−
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−major  minor Java platform version
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−45       3           1.0
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−45       3           1.1
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−46       0           1.2
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−47       0           1.3
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−48       0           1.4
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−49       0           1.5
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−50       0           1.6
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−
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−* Modifiers.
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−
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−** public.
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−
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− * Public class is visible in other packages.
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− * Public field is visible everywhere (class must be public too).
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−
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−** private.
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−
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− * Private variables or methods may be used only by an instance of the same
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− class that declares the variable or method
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− * A private feature may only be accessed by the class that owns the feature.
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−
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−** protected.
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−
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− * Is available to all classes in the same package and also available to all
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− subclasses of the class that owns the protected feature.
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− * This access is provided even to subclasses that reside in a different
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− package from the class that owns the protected feature.
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−
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−** default.
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−
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−What you get by default ie, without any access modifier.
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−
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− * It means that it is visible to all within a particular package.
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−
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−* static.
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−
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− * Static means one per class, not one for each object no matter how many
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−   instance of a class might exist. This means that you can use them without
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−   creating an instance of a class.
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− * Static methods are implicitly final, because overriding is done based on
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−   the type of the object, and static methods are attached to a class, not an
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−   object.
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− * A static method in a superclass can be shadowed by another static method in
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−   a subclass, as long as the original method was not declared final.
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− * You can't override a static method with a nonstatic method.
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−
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−* final.
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−
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− * A final class can't be extended ie., final class may not be subclassed.
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− * A final method can't be overridden when its class is inherited.
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− * You can't change value of a final variable.
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−
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−* Exceptions.
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−
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−A checked exception is some subclass of Exception (or Exception itself),
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−excluding class RuntimeException and its subclasses.
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−
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−Unchecked exceptions are RuntimeException and any of its subclasses. Class
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−Error and its subclasses also are unchecked. With an unchecked exception,
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−however, the compiler doesn't force client programmers either to catch the
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−exception or declare it in a throws clause.
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−
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−* Inner classes.
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−
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−** Nested top-level classes.
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−
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−If you declare a class within a class and specify the static modifier, the
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−compiler treats the class just like any other top-level class.
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−
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−Any class outside the declaring class accesses the nested class with the
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−declaring class name acting similarly to a package. eg, outer.inner. Top-level
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−inner classes implicitly have access only to static variables. There can also
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−be inner interfaces. All of these are of the nested top-level variety.
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−
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−** Member classes.
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−
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−Member inner classes are just like other member methods and member variables
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−and access to the member class is restricted, just like methods and variables.
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−This means a public member class acts similarly to a nested top-level class.
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−
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−The primary difference between member classes and nested top-level classes is
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−that member classes have access to the specific instance of the enclosing
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−class.
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−
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−** Local classes.
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−
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−Local classes are like local variables, specific to a block of code. Their
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−visibility is only within the block of their declaration. In order for the
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−class to be useful beyond the declaration block, it would need to implement a
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−more publicly available interface.
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−
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−Because local classes are not members, the modifiers public, protected,
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−private, and static are not usable.
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−
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−** Anonymous classes.
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−
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−Anonymous inner classes extend local inner classes one level further. As
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−anonymous classes have no name, you cannot provide a constructor.
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−
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−* 64-bit problem.
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−
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−  http://www.java.com/en/download/faq/java_win64bit.xml
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−                Which version of Java should I download for my 64-bit Windows
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−                operating system?
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−  http://java.sun.com/javase/6/webnotes/install/system-configurations.html
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−                Java� SE 6 Release Notes Supported System Configurations
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−