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A reference variable of a superclass can be assigned a reference to any subclass derived from that superclass. You will find this aspect of inheritance quite useful in a variety of situations. For example, consider the following: Here, weightbox is a reference to BoxWeight objects, and plainbox is a reference to Box objects. Since BoxWeight
Superclass variable can reference a subclass variable in java Read More »
Inheritance is the process by which objects of one class can link and share some common properties of objects from another class. Use of inheritance : For Method Overriding (so runtime polymorphism can be achieved). For Code Reusability. Syntax of inheritance : The extends keyword indicates that you are making a new class that derives
Problem: Consider an integer innum greater than 1. Identify and print, outnum, such that – The sum of num1 and num2 is a palindrome where 1. num1 is the largest palindrome smaller than innum 2. num2 is the smallest palindrome greater then innum If the sum is not a palindrome, repeat the above step by
Sometimes you will want to pass information into a program when you run it. This is accomplished by passing command-line arguments to main( ). A command-line argument is information that directly follows the program’s name on the command line when it is executed. To access the command-line arguments inside a Java program is quite easy
Java BufferedReader class is used to read the text from a character-based input stream. It can be used to read data line by line by readLine() method. It makes the performance fast. It inherits Reader class. Java BufferedReader class declaration Let’s see the declaration for Java.io.BufferedReader class: public class BufferedReader extends Reader Output Latest Posts
Question: Some prime numbers can be expressed as a sum of other consecutive prime numbers. For example, 5 = 2 + 3 17 = 2 + 35 + 7 41 = 2 + 3 + 5 + 7 + 11 + 13.Now the task is to find out how many prime numbers which satisfy this
Counting prime number that is expressed as the sum of consecutive prime numbers Read More »
It is a statement in C that allows to execute a specific code block. It is one of the many alternative ways. Note: switch case follows a top-down approach. Syntax : Example : 1 Explanation:For value 1, the expression is matched with all the case values, the case value which matches with the expression i.e.
There are many ways of doing it-1. pop method- list.pop()2. remove method- list.remove(list[index])3. del function- del list[index]4. slicing- list[2:] Here is an example for you- Output: Explanation:Here,pop(0) pops the first element from the list. The for loop executes the block 2 times which means the first element is popped every time the list gets updated.remove(b[0])
There are many ways of doing it, here are a few ways-1. pop method – list.pop()2. slicing – list[:1],list[1:] Here is an example for you- Output: Explanation:Here,pop(0) pops the first element from the list. Then the popped element is added to the last using append() method.d[:1] slices the array/list till index 0 which means the
Remove the first element and add it to last in Python List Read More »
