Object_Class

1. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class A
{
 int i;
}

class Manager1   // All object class methods available
{
 public static void main (String[] args) 
 {
  A a1 = new A();
  a1.i = 10;
  A a2 = new A();
  a2.i = 20;
  System.out.println(a1); // internaly toString method is called
  System.out.println(a2);
 }

}

---

2. Program

//Find what it gives Compiletion Error / Compiletion Successfully / Output ?
class B
{
 int i;
}

class Manager2  
{
 public static void main (String[] args) 
 {
  B b1 = new B();
  b1.i = 10;
  String s1 = b1.toString();
  System.out.println(b1);
  System.out.println(s1);
 }

}

---

3. Program

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

class Manager3  
{
 public static void main (String[] args) 
 {
  C c1 = new C(90);
  String s1 = c1.toString();
  String s2 = "address:" + c1;
  System.out.println(c1); // internaly toString method is called
  System.out.println(s1);
  System.out.println(s2); 
 }

}

---

4. Program

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

class Manager4  
{
 public static void main (String[] args) 
 {
  D d1 = new D();
  D d2 = d1;
  System.out.println(d1);
  System.out.println(d2); 
 }

}

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