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Jul 2nd, 2009

What is the Use of Inner classes

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Can any one justify the use of inner classes with example(if possible)

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painless

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Jul 2nd, 2009

Re: What is the Use of Inner classes

To be visible to just parent class.

C# Syntax (Toggle Plain Text)
namespace Example
{
class Parent 
{
void Method()
{
Child c = new Child();//No error
}
class Child
{
}
}
class Painless
{
void Method()
{
Child c = new Child();//error
}
}
}
namespace Example
{
class Parent 
{
void Method()
{
Child c = new Child();//No error
}
class Child
{
}
}
class Painless
{
void Method()
{
Child c = new Child();//error
}
}
}

Ramy Mahrous

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Postaholic

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Jul 2nd, 2009

Re: What is the Use of Inner classes

Sometimes you need an instance of a class - eg as a Listener for a Swing Event,, or a Runnable for a Thread - and these are most conveniently and compactly created locally as inner classes, often anonymous inner classes.

JamesCherrill

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Jul 2nd, 2009

Re: What is the Use of Inner classes

And inner classes can provide specific functionality for their parent classes. There are relevant examples in the Sun tutorials on inner classes.

BestJewSinceJC

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Posting Maven

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