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Scanner class Methods in Java

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Fibonacci Series program in Java

Fibonacci Series Fibonacci series is a mathematical series.In this series, first two numbers are written by user and other numbers are generated using these two numbers. The program adds the first two numbers to generate third number. The the fourth number is calculated by adding second and third number. This process goes on until n numbers. Lets have a look at Fibonacci series generated using 0 and 1 as first two numbers. 0 , 1, 1 , 2, 3, 5, 8, 13, 21, 34,.............n In above series , each numbers is combination of previous two numbers except first 0 and 1. Third number 1 is calculated by adding first two numbers, 0 and 1 as 0+1=1, then 1+1=2, 2+1=3 so on. Program with simple approach There are several ways two write a program. Each programmer has his own way of writing programs. As I said in my previous post, I will make sure these programs can be easily understandable to beginners also.So, I will write in simple way and with other approaches too. Write a progr

Generating Random Number in Java

Random Numbers At many places we require our program to generate random numbers.Like, you want to make a program where you can roll a dice there you will use random number generator for 6 numbers.Random numbers are very helpful in many things. Another example is to change the background to random colors. Today, we will learn how to generate Random numbers in java.There are two methods to generate random numbers:- Math.random() method Random class Random numbers using Math.random() In java, Math class contains a lot useful methods.The random() method is one of them.It helps a lot with generating random numbers. You do not need to import java.Math class for using this method.Instead you can statically import it. Example: Math.random() You can use method syntax as above. To print new random number every time on screen,enclose this method in print statement. Example: System.out.println(Math.random()); Each time you run this code, it will print random number between 0 and 1. How to gen

How base class constructor can be accessed?

In the previous posts,we learnt about Constructors . In this post, we will learn how to call base class constructor from a child class. The super Keyword A subclass inherits the accessible data fields and methods from its superclass, but the constructors of super(base) class are not inherited in the derived(child) class.The only way use constructor of base class from subclass is to invoke the base class's constructor. The super keyword is used to call the constructor of super (base) class. The super keyword refers to the base class and is beneficial when we want to initialize the constructor of super class. Syntax: super([arguments]) We can call super class constructor using super keyword and passing arguments is optional.If you wan to pass argument then you can pass multiple arguments by separating them with comma. How to call Super Class constructor from Subclass? Now, we are familiar with super Keyword.But you must know how to use super? In the body of subclass constructor t

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Scanner class Methods in Java

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