final variable

[Armstrong D]

Hi
Mughal book page no 123 says
" For a final variable of a reference type it means that its reference value cannot be changed, but the state of the object it references may be changed"
am getting confused with this, can anybody explain please,
Thank's in Advance
Armstrong

[Marilyn de Queiroz]

Armstrong D

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[Marilyn de Queiroz]

class TestFinal
{
    
    public static void main( String[] args )
    {
        final NewObject first = new NewObject();
        NewObject another = new NewObject();
        first = another ; // This line won't compile because first is final.
        first.i = 2 ; // changing the state of the object "first"
        System.out.println( first.getI() );
    }
    
}
class NewObject
{
    
    int i = 1 ;
    
    int getI()
    {
        return i ;
    }
    
}

[ July 01, 2002: Message edited by: Marilyn deQueiroz ]