Hi,


If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.

Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner.

Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.

There are two additional types of inner classes.

1: You can declare an inner class within the body of a method. Such a class is known as a "local inner class".

2: You can also declare an inner class within the body of a method without naming it. These classes are known as "anonymous inner classes".

For example :
Classes can be defined inside of other classes, as in the following:

class A {
class B {
}
}


This second form of class B is called an inner class because the class is defined inside another class.

There are four different types of inner classes: top-level, member, local, and anonymous.

Top-level inner classes are just like other outer class definitions.

The key differences are that the class is declared within another class, and the inner class gets the static keyword added before the class keyword:

class OuterClass {
static class InnerClass {
}
}

When class A is compiled, two .class files are generated, one for InnerClass and one for OuterClass.
hopes you will get your answer well..

Answered by Raksha , an ibibo Master, at 8:30 AM on June 26, 2008

well jiks, The Java programming language allows you to define a class within another class. Such a class is called a nested class and is illustrated here:

e.g.
class OuterClass {
...
class NestedClass {
...
}
}

Nested classes are divided into two categories: static and non-static. Nested classes that are declared static are simply called static nested classes. Non-static nested classes are called inner classes.

e.g.
class OuterClass {
...
static class StaticNestedClass {
...
}
class InnerClass {
...
}
}

There are two additional types of inner classes.

1: You can declare an inner class within the body of a method. Such a class is known as a "local inner class".

2: You can also declare an inner class within the body of a method without naming it. These classes are known as "anonymous inner classes".

You will encounter such classes in advanced Java programming.

Answered by Romi , an ibibo Master, at 6:27 PM on June 17, 2008

Hi,


If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.

Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner.

Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.

There are two additional types of inner classes.

1: You can declare an inner class within the body of a method. Such a class is known as a "local inner class".

2: You can also declare an inner class within the body of a method without naming it. These classes are known as "anonymous inner classes".

For example :
Classes can be defined inside of other classes, as in the following:

class A {
class B {
}
}


This second form of class B is called an inner class because the class is defined inside another class.

There are four different types of inner classes: top-level, member, local, and anonymous.

Top-level inner classes are just like other outer class definitions.

The key differences are that the class is declared within another class, and the inner class gets the static keyword added before the class keyword:

class OuterClass {
static class InnerClass {
}
}

When class A is compiled, two .class files are generated, one for InnerClass and one for OuterClass.
hopes you will get your answer well...........

Answered by Ajay Pal , an ibibo Master, at 4:05 PM on June 02, 2008

Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class. Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. e.g., outer. inner. Top-level inner classes implicitly have access only to static variables. There can also be inner interfaces. All of these are of the nested top-level variety.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a more publicly available interface. Because local classes are not members, the modifiers public, protected, private, and static are not usable.

Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.

Answered by Madhurima , an ibibo Master, at 1:06 PM on May 31, 2008

Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class. Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. e.g., outer. inner. Top-level inner classes implicitly have access only to static variables. There can also be inner interfaces. All of these are of the nested top-level variety.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a more publicly available interface. Because local classes are not members, the modifiers public, protected, private, and static are not usable.

Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.

Answered by manu pal , an ibibo Citizen, at 5:39 AM on May 29, 2008

well Marven, If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.
Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner. Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a
more publicly available interface.Because local classes are not members, the modifiers public, protected, private, and static are not usable.

Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.




For more information , please do visit source site:
http://kyapoocha.com/ja va- interview-questions/what-are-d ifferent-types-of-inner-classe s-2/

Hope it will help you out.

Answered by Uttam , an ibibo Master, at 8:33 PM on May 28, 2008

JAVA programming allows four types innner class. These inner classes are given below-

Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.
Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner. Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a
more publicly available interface.Because local classes are not members, the modifiers public, protected, private, and static are not usable.

Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.

Answered by Nagendra , an ibibo Master, at 5:36 PM on May 28, 2008

Nested top-level classes, Member classes, Local classes, Anonymous classes
Nested top-level classes- If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.
Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner. Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.

Member classes - Member inner classes are just like other member methods and member variables and access to the member class is restricted, just like methods and variables. This means a public member class acts similarly to a nested top-level class. The primary difference between member classes and nested top-level classes is that member classes have access to the specific instance of the enclosing class.

Local classes - Local classes are like local variables, specific to a block of code. Their visibility is only within the block of their declaration. In order for the class to be useful beyond the declaration block, it would need to implement a
more publicly available interface.Because local classes are not members, the modifiers public, protected, private, and static are not usable.

Anonymous classes - Anonymous inner classes extend local inner classes one level further. As anonymous classes have no name, you cannot provide a constructor.

Source :

http://kyapoocha.com/java - interview-questions/what-are-d ifferent-types-of-inner-classe s-2/

Answered by Shobhit , an ibibo Master, at 2:17 PM on May 28, 2008

hello marven In Java there are four types of nested class:

Static member class, also simply called nested class - They are declared static. Like other things in static scope, they do not have an enclosing instance, and cannot access instance variables and methods of the enclosing class. They are almost identical to non-nested classes except for scope details (they can refer to static variables and methods of the enclosing class without qualifying the name; other classes that are not one of its enclosing classes have to qualify its name with its enclosing class's name). Nested interfaces are implicitly static.
Inner class - The following categories are called inner classes. Each instance of these classes has a reference to an enclosing instance (i.e. an instance of the enclosing class), except for local and anonymous classes declared in static context. Hence, they can implicitly refer to instance variables and methods of the enclosing class. The enclosing instance reference can be explicitly obtained via EnclosingClassName.this. Inner classes may not have static variables or methods, except for compile-time constant variables. When they are created, they must have a reference to an instance of the enclosing class; which means they must either be created within an instance method or constructor of the enclosing class, or (for member and anonymous classes) be created using the syntax enclosingInstance.new InnerClass().
Member class - They are declared outside a function (hence a "member") and not declared "static".
Local class - These are classes which are declared in the body of a function. They can only be referred to in the rest of the function. They can use local variables and parameters of the function, but only ones which are declared "final". (This is because the local class instance must maintain a separate copy of the variable, as it may out-live the function; so as not to have the confusion of two modifiable variables with the same name in the same scope, the variable is forced to be non-modifiable.)
Anonymous class - These are local classes which are automatically declared and instantiated in the middle of an expression. They can only directly extend one class or implement one interface. They can specify arguments to the constructor of the superclass, but cannot otherwise have a constructor.
C++ has nested classes that are like Java's static member classes (first kind above), except that they are not declared with "static".

for more inf check source http://en.wikipedia.org/wiki/Inner_ class

Answered by raj u , an ibibo Master, at 1:54 PM on May 28, 2008

If you declare a class within a class and specify the static modifier, the compiler treats the class just like any other top-level class.
Any class outside the declaring class accesses the nested class with the declaring class name acting similarly to a package. eg, outer.inner. Top-level inner classes implicitly have access only to static variables.There can also be inner interfaces. All of these are of the nested top-level variety.
There are two additional types of inner classes.
1: You can declare an inner class within the body of a method. Such a class is known as a "local inner class".
2: You can also declare an inner class within the body of a method without naming it. These classes are known as "anonymous inner classes".
For example :
Classes can be defined inside of other classes, as in the following:

class A {
class B {
}
}

This second form of class B is called an inner class because the class is defined inside another class. There are four different types of inner classes: top-level, member, local, and anonymous.

Top-level inner classes are just like other outer class definitions. The key differences are that the class is declared within another class, and the inner class gets the static keyword added before the class keyword:

class OuterClass {
static class InnerClass {
}
}

When class A is compiled, two .class files are generated, one for InnerClass and one for OuterClass.
hopes you will get your answer well...........

Answered by shaista , an ibibo Master, at 1:50 PM on May 28, 2008