Object Class

13. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class N
{

}

class Manager14
{
 public static void main (String[] args) 
 {
  N n1 = new N();
  N n2 = new N();
  N n3 = n1;
  System.out.println(n1==n2); 
  System.out.println(n2==n3); 
  System.out.println(n3==n1); 
 }
}

---

14. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class O
{
 String s1;
}

class Manager15
{
 public static void main (String[] args) 
 {
  O o1 = new O();
  o1.s1 = "abc";
  
  O o2 = new O();
  o2.s1 = "abc";
  
  O o3 = o2;
  
  System.out.println(o1==o2); 
  System.out.println(o2==o3); 
  System.out.println(o3==o1);
  
 }
}

---

15. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class P
{
 int i;
 P(int i)
 {
  this.i = i;
 }
}

class Manager16
{
 public static void main (String[] args) 
 {
  P p1 = new P(100);
  P p2 = new P(100);
  P p3 = p1;
  System.out.println(p1 == p2); 
  System.out.println(p2 == p3); 
  System.out.println(p3 == p1); 
  System.out.println(p1.i == p2.i);
  
 }
}

---

16. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class Q
{
 boolean b;
}

class Manager17
{
 public static void main (String[] args) 
 {
  Q q1 = new Q();
  q1.b = true;
  Q q2 = new Q(); 
  q2.b = true;
  System.out.println(q1 == q2); 
  System.out.println(q1.b == q2.b);
  double d1 = 10.3 , d2 = 10.3;
  System.out.println(d1 == d2); 
 }
}

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