//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
}
class B extends A
{
}
class C extends B
{
}
class D extends C
{
}
class Manager1
{
public static void main(String[] args)
{
// Object class is Super Class Of all Classes
Object obj = new Object();
A a1 = new A();
B b1 = new B();
C c1 = new C();
D d1 = new D();
System.out.println("Done");
}
}
2. Program
//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
}
class B extends A
{
}
class C extends B
{
}
class D extends C
{
}
class Manager2
{
public static void main(String[] args)
{
Object obj = null;
A a1 = null;
B b1 = null;
C c1 = null;
D d1 = null;
obj = new Object();
a1 = new A();
b1 = new B();
c1 = new C();
d1 = new D();
System.out.println("Done");
}
}
3. Program
//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
}
class B extends A
{
}
class C extends B
{
}
class D extends C
{
}
class Manager5
{
public static void main(String[] Args)
{
A a1 = new B();
B b1 = new C();
C c1 = new D();
Object obj = new A();
System.out.println("Done");
}
}
4. Program
//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
}
class B extends A
{
}
class C extends B
{
}
class D extends C
{
}
class Manager6
{
public static void main(String[] Args)
{
A a1 = new C();
Object obj = new D();
B b1 = new C();
C c1 = new D();
System.out.println("Done");
}
}
5. Program
//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
}
class B extends A
{
}
class C extends B
{
}
class D extends C
{
}
class Manager8
{
static void test(A a1)
{
System.out.println("test(A)");
}
public static void main(String[] Args)
{
test(new B());
test(new C());
test(new D());
B b1 = new B();
test(b1);
D d1 = new D();
test(d1);
System.out.println("Done");
}
}