casting

[Ayman Jaffar]

//if line (222) is a compile time error then WHY DOES line (111) //throw an Exception at runtime instread of a compile time error //?!?
public class c1{
public static void main(String[] args) {
ApBase base = new ApBase();

Inf i = (Inf) base; //line (111)
String s = new String("hi all");
Inf i2 = (Inf) s; //line (222)
}
}
class ApBase extends Object {}
class ApSomeOther extends ApBase implements Inf {
public void amethod() {}
}
interface Inf { public void amethod(); }

[Anonymous]

Compile time rule for casting a non-final class to an interface is always Ok, for casting a final class(String) to an interface is "the fianl class must implement the interface".

[Ayman Jaffar]

Thanks alot youngrao. Now my problem is resolved.