Computer Applications
Answer
If we don't assign an object created by the new operator to a variable then it is known as a temporary instance or an anonymous object. If we want to use an object only once, then we can use it as a temporary instance. The below example illustrates this:
class Sum {
int x;
int y;
public Sum(int a, int b) {
x = a;
y = b;
}
public void computeSum() {
int s = x + y;
System.out.println("Sum = " + s);
}
public static void main(String[] args) {
new Sum(3, 5).computeSum();
}
}
In the main method, the object of class Sum is not assigned to any variable. We use it just to print the sum of 3 and 5 after which it is destroyed.
Related Questions
The basic salary of employees is undergoing a revision. Define a class called Grade_Revision with the following specifications:
Data Members Purpose String name to store name of the employee int bas to store basic salary int expn to consider the length of service as an experience double inc to store increment double nbas to store new basic salary (basic + increment) Member Methods Purpose Grade_Revision() constructor to initialize all data members void accept() to input name, basic and experience void increment() to calculate increment based on experience as per the table given below void display() to print all the details of an employee Experience Increment Up to 3 years ₹1,000 + 10% of basic 3 years or more and up to 5 years ₹3,000 + 12% of basic 5 years or more and up to 10 years ₹5,000 + 15% of basic 10 years or more ₹8,000 + 20% of basic Write the main method to create an object of the class and call all the member methods.
Define a class called Student to check whether a student is eligible for taking admission in class XI with the following specifications:
Data Members Purpose String name to store name int mm to store marks secured in Maths int scm to store marks secured in Science double comp to store marks secured in Computer Member Methods Purpose Student( ) parameterised constructor to initialize the data members by accepting the details of a student check( ) to check the eligibility for course based on the table given below void display() to print the eligibility by using check() function in nested form Marks Eligibility 90% or more in all the subjects Science with Computer Average marks 90% or more Bio-Science Average marks 80% or more and less than 90% Science with Hindi Write the main method to create an object of the class and call all the member methods.
Define a class Bill that calculates the telephone bill of a consumer with the following description:
Data Members Purpose int bno bill number String name name of consumer int call no. of calls consumed in a month double amt bill amount to be paid by the person Member Methods Purpose Bill() constructor to initialize data members with default initial value Bill(…) parameterised constructor to accept billno, name and no. of calls consumed Calculate() to calculate the monthly telephone bill for a consumer as per the table given below Display() to display the details Units consumed Rate First 100 calls ₹0.60 / call Next 100 calls ₹0.80 / call Next 100 calls ₹1.20 / call Above 300 calls ₹1.50 / call Fixed monthly rental applicable to all consumers: ₹125
Create an object in the main() method and invoke the above functions to perform the desired task.
Define a class called BookFair with the following description:
Data Members Purpose String Bname stores the name of the book double price stores the price of the book Member Methods Purpose BookFair( ) Constructor to initialize data members void input( ) To input and store the name and price of the book void calculate( ) To calculate the price after discount. Discount is calculated as per the table given below void display( ) To display the name and price of the book after discount Price Discount Less than or equal to ₹1000 2% of price More than ₹1000 and less than or equal to ₹3000 10% of price More than ₹3000 15% of price Write a main method to create an object of the class and call the above member methods.