Abstract Keyword

9. Program

// Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
abstract class U
{
 U()
 {
  System.out.println("U()");
 }
 
 void test1()
 {
  System.out.println("method");
 }
 
 abstract void test2();
 
}

---

10. Program

// Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
abstract class V
{
 V()
 {
  System.out.println("v()");
 }
 
}

class W extends V
{
 W()
 {
  System.out.println("W()");
 }
 
 public static void main(String[] args)
 {
  W w1 = new W();
  System.out.println("----");
  
 }
}

---

11. Program

// Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
abstract class X
{
 X(int i)
 {
  System.out.println("X(int)");
 }
 abstract void test1();
}

abstract class Y extends X
{
 Y()
 { 
  super(90);
  System.out.println("Y()");
 }
 
}

class Z extends Y
{
 Z()
 {
  System.out.println("Z()");
 }
 void test1()
 {
  System.out.println("From test1");
 }
 public static void main(String[] args)
 {
  Z z1 = new Z();
  System.out.println("----");
  z1.test1();
 }
}

---

Page....