Java program to use class and object YASH PAL, 31 July 2024 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 coding problems java