Question

give example of method overloading in java

Answer 1

Overloading – Different Number of parameters in argument list

This example shows how method overloading is done by having different number of parameters

class DisplayOverloading
{
public void disp(char c)
{
System.out.println(c);
}
public void disp(char c, int num)
{
System.out.println(c + " "+num);
}
}
class Sample
{
public static void main(String args[])
{
DisplayOverloading obj = new DisplayOverloading();
obj.disp('a');
obj.disp('a',10);
}
}

Output:

a
a 10

In the above example – method disp() is overloaded based on the number of parameters – We have two methods with the name disp but the parameters they have are different. Both are having different number of parameters.

Answer 2

Using overloading write a program to calculate and print the area of a square, rectangle and circle.

class AreaOverload

{

double a;

void area(int side)

{

a=side*side;

System.out.println("Area of a square is :"+a);

}

void area(int len, int br)

{

a=len*br;

System.out.println("Area of a Rectangle is :"+a);

}

void area(double r)

{

a=3.14*r*r;

System.out.println("Area of a circle is :"+a);

}

public static void main(String args[ ] )

{

AreaOverload ar=new AreaOverload();

ar.area(3);

ar.area(4,6);

ar.area(3.5);

}

}