//Java Default and Parameterized Constructor
class example
{
int a,b;
//default constructor
example()
{
a=10;
b=90;
}
//parameterized constructor
example(int x,int y)
{
a=x;
b=y;
}
void display()
{
System.out.println("a="+a);
System.out.println("b="+b);
}
}
class test
{
public static void main(String args[])
{
example obj=new example();
obj.display();
example obj1=new example(30,40);
obj1.display();
}
}
//Java Parameterized and Copy Constructor
class example
{
int a,b;
example(int x,int y)
{
System.out.println("parametrized constructor");
a=x;
b=y;
}
//constructor to intilaize another object
example(example obj)
{
System.out.println("copy constructor");
a=obj.a;
b=obj.b;
}
void display()
{
System.out.println("a="+a);
System.out.println("b="+b);
}
}
class test1
{
public static void main(String args[])
{
example obj1=new example(10,20);
obj1.display();
example obj2=new example(obj1);
obj2.display();
example obj3=obj2;
obj3.display();
}
}
//Java Constructor Overloading
class example
{
int rno;
String nm;
int age;
example(int i,String n)
{
rno=i;
nm=n;
}
example(int i,String n,int a)
{
rno=i;
nm=n;
age=a;
}
void display()
{
System.out.println("rno="+rno);
System.out.println("nm="+nm);
System.out.println("age="+age);
}
}
class test2
{
public static void main(String args[])
{
example obj=new example(101,"Tina Singh");
obj.display();
example obj1=new example(102,"Ram Singh",30);
obj1.display();
}
}
