Write a program in Java to develop overloaded constructor. Also develop the copy constructor to create a new object with the state of the existing object.

By -

Write a program in Java to develop overloaded constructor. Also develop the copy constructor to create a new object with the state of the existing object.

public class OverloadCopyConst
{
    int n;
    OverloadCopyConst()
    {
        System.out.println("Default Constructor");
    }
   
    OverloadCopyConst(int x, int y)
    {
        System.out.println("Addition is "+(x+y));
    }
   
    OverloadCopyConst(int a)
    {
        n=a;
        System.out.println("Number is "+n);
        
        int i,j,flag;
       
        for(i=1;i<=n;i++)
        {
            flag=0;
            for(j=2;j<=i/2;j++)
            {
                if(i%j==0)
                {
                    flag++;
                    break;
                }
            }
           
            if(flag==0)
            {
                System.out.println("Prime is "+i);
            }
        }
    }
   
    OverloadCopyConst(OverloadCopyConst cp, int a)
    {
        n=cp.n;
        int max;
        max=a>n?a:n;
        System.out.println("Maximum number is "+max);
    }
   
    public static void main(String arg[])
    {
        OverloadCopyConst cp1=new OverloadCopyConst(5,6);
        OverloadCopyConst cp2=new OverloadCopyConst(5);
        OverloadCopyConst cp3=new OverloadCopyConst(cp2,5);
    }
}

OUTPUT:-




Develop minimum 4 program based on variation in methods i.e. passing by value, passing by reference, returning values and returning objects from methods

1.   passing by value

class PBV
{
int i;
void set_data(int a)
{
i=a;
}
void display()
{
System.out.print("i : " + i);
}
}
public class Example
{
public static void main(String[] args)
{
PBV obj = new PBV();
obj.set_data(5); //Pass by Value
obj.display();
}
}
OUTPUT:-

i : 5




2.    passing by reference

class PBR
{
int i;
void set_data(PBR o)
{
i = o.i;
}
void display()
{
System.out.print("i : " + i);
}
}
public class Example
{
public static void main(String[] args)
{
PBR obj1 = new PBR();
PBR obj2 = new PBR();
obj1.i=7;
obj2.set_data(obj1); //Pass by Reference
obj2.display();
}
}

OUTPUT:-

i : 7






3.    Returning values

class RBV
{
int i;
void set_data(int a)
{
i=a;
}
int incrByOne()
{
i++;
return (i);
}
}
public class Example
{
public static void main(String[] args)
{
RBV obj1 = new RBV();
obj1.set_data(5); //Pass by Value
int value = obj1.incrByOne(); // Return by Value
System.out.println("i : " + value);
}
}

OUTPUT:-

i : 6





4.    Returning objects

class RBR
{
int i;
RBR Copy()
{
RBR temp = new RBR();
temp.i = i;
return temp;
}
void display()
{
System.out.println("i : "+ i);
}
}
public class Example
{
public static void main(String[] args)
{
RBR obj1 = new RBR();
obj1.i=7;
RBR obj2 = obj1.Copy(); //Return by Reference
obj1.display();
obj2.display();
}
}

OUTPUT:-

i : 7
i : 7


Comments

Post a Comment