Object And Class

22. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class V
{
 int i ;
 static V test()
 {
  return  new V();
 }
 
 public static void main(String[] args)
 {
  V v1 = test();
  System.out.println(v1.i);
  
 }
}

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23. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class W
{
 int i ;
 static W test(W w1)
 {
  W w2 = new W();
  w2.i = w1.i;
  return w2;
 }
 
 public static void main(String[] args)
 {
  W w1 = new W();
  w1.i = 20;
  W w2 = test(w1);
  System.out.println(w2.i);
  
 }
}

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24. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ? 
class X
{
 int i ;
 static void test(X obj1, X obj2)
 {
  int  i = obj1.i;
  obj1.i = obj2.i;
  obj2.i =  i ;
 }
 
 public static void main(String[] args)
 {
   X x1 = new X(), x2 = new X();
   x1.i = 10;
   x2.i = 20;
   test(x1, x2);
   System.out.println(x1.i);
   System.out.println(x2.i);
 }
}

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