Let’s put your knowledge into practice. Complete the following questions: 1. Create a class named 'Student' with String variable 'name' and integer variable 'roll_no'. Assign the value of roll_no as '2' and that of name as "John" by creating an object of the class Student. 2. Assign and print the roll number, phone number and address of two students having names "Sam" and "John" respectively by creating two objects of class 'Student'. 3. Write a program to print the area of a rectangle by creating a class named 'Area' having two methods. First method named as 'setDim' takes length and breadth of rectangle as parameters and the second method named as 'getArea' returns the area of the rectangle. Length and breadth of rectangle are entered through keyboard.
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Let’s put your knowledge into practice. Complete the following questions:
1. Create a class named 'Student' with String variable 'name' and integer variable 'roll_no'. Assign the value of roll_no as '2' and that of name as
"John" by creating an object of the class Student.
2. Assign and print the roll number, phone number and address of two students having names "Sam" and "John" respectively by creating two objects
of class 'Student'.
3. Write a program to print the area of a rectangle by creating a class named 'Area' having two methods. First method named as 'setDim' takes length
and breadth of rectangle as parameters and the second method named as 'getArea' returns the area of the rectangle. Length and breadth of
rectangle are entered through keyboard.
4. Create a class named 'PrintNumber' to print various numbers of different datatypes by creating different methods with the same name 'printn'
having a parameter for each datatype.
5. What is the output of this question?
class Test1 {
public
static void main(String[] args)
{
int x = 20;
System.out.println(x);
}
static
{
int x = 10;
System.out.print(x + " ");
}
}
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