archu sweet

@ jesper:

CardBoard c3 = c1.go(c2); i when this line is compiled go function is invoked which sets c2's value to null in go function...am i correct??

c2=null

class CardBoard { Short story = 5; CardBoard go(CardBoard cb) { cb = null; return cb; } public static void main(String[] args) { CardBoard c1 = new CardBoard(); CardBoard c2 = new CardBoard(); CardBoard c3 = c1.go(c2); c1 = null; // do Stuff } }
When // doStuff is reached,

I guess 3 objects are eligible for Garbage collection..C1,C2,C3...am i correct?? correct me if i'm wrong ??

i think overriding of same functions is not possible in same class....am i correct??

yes i meant p0 == p1...i tried out it says it is valid....but they belong to different classes how can they be equal ??

It is throwing this error : Exception in thread "main" java.lang.Error: Unresolved compilation problem

public class A { public void doit() { System.out.println("hi"); } public void doit() { System.out.println("hsdsi"); } public double doit(int x) { return 1.0; } public static void main(String args[]) { System.out.println("hi"); } }

I just wanted to know what is wrong in the above code ?

class ClassA {} class ClassB extends ClassA {} class ClassC extends ClassA {} and: ClassA p0 = new ClassA(); ClassB p1 = new ClassB();

I want to know how come p0=p1 is true ??

marc weber : Thanks a ton!!....I have understood...Your explanation is too good!!

package Hi; public class Animal { public String noise() { return "peep"; } } public class Dog1 extends Animal { public String noise() { return "bark"; } } public class Cat5 extends Animal { public String noise() { return "meow"; } public static void main(String args[]) { Animal animal = new Dog1(); Cat5 cat = (Cat5)animal; System.out.println(cat.noise()); } }

I jus wanted to know what is wrong here which causes the compiler to throw Exception in thread "main" java.lang.ClassCastException: Hi.Dog1 cannot be cast to Hi.Cat5
at Hi.Cat5.main(Cat5.java:8)...error....Please help me out !!

i have jus another silly doubt ..

can we declare static a[0]=2; instead of static { a[0]=2; } ??


i'm not clear with the declarations...

Thnks guys ...