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Message:

problem in java

Posted by gopal on May 31, 2001 at 10:41 AM

hi
i made a class like this
class a extends Object implements Runnable
{
public static void main(String s[])
{
a a1=new a();
Object o=a1;
Runnable r=o;
}}
however this does not compiler as it asks for a explicit cast
however changing the program as
Runnable r=a1;
Object o=r;
does not require any cast .please explain why.
gopal

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