Java program to use class and object

In this tutorial, we are going to write a Java program to use classes and objects in Java Programming with practical program code and step-by-step full complete explanation.

Java program to use class and object.

 
class Rectangle
{
    private int l,b;
 
    public void setDimension(int x,int y)
    {
        l=x;
        b=y;
    }
 
    public int area()
    {
        return l*b;
    }
 
    public void display()
    {
        System.out.println("Length = "+l);
        System.out.println("Breadth = "+b);
    }
 
    public static void main(String ac[])
    {
        Rectangle r=new Rectangle();
        r.setDimension(5,10);
        r.display();
        System.out.println("Area = "+r.area());
    }
}

Output

 
Length = 5
Breadth = 10
Area = 50