In the above Java program to display the first 50 pentagonal numbers, we first need to understand what is pentagon? A pentagonal number is a figurative number that extends the concept of triangular and square numbers to the pentagon, but, unlike the first two, the patterns involved in the construction of pentagonal numbers are not…
In the above Java program to count all vowels in a string we use built-in function count() and with the help of a counter variable, calculate each and every vowel. Sample Output: Input the string: welcome To the world of java Number of Vowels in the string: 9
In the above Java program to print a right angles triangle from a number, we have use nested loop where i is row and j is column in that row. Sample Output: Input number of rows : 10 1 12 123 1234 12345 123456 1234567 12345678 123456789 12345678910
In this java tutorial, we will learn about multithreading in java, how to create a thread, run multiple threads, the life cycle of a thread, and many more important methods of Thread class in Java with an example. What is a Thread? In computer science, a thread is a small set of instructions that are…
In this java exception handling tutorial, we will learn, what is an exception, how to handle exceptions, and important keywords and classes of exception handling in java with an example. What is an Exception An exception is an abnormal condition, which occurs at run time and terminates the flow of the program. Just think about…
In this tutorial, we will learn about the java package. Here, we will learn what is package, how to use a package, and how to create a package in Java. What is a package in Java? In java, the package is just like a folder that includes classes, interfaces, and sub-packages also. It behaves like…
In this interface in java tutorial, we will learn why to use interface and how to declare java interface. What is Java Interface It is just like a class in java, which includes abstract method. It includes abstract method (method without definition), so we can’t create object of an interface. It is always behave like…
Java Inheritance – In this tutorial, we learn how to create inheritance in Java and types of inheritance with examples. What is Inheritance It it concept of OOPs in which we can create a new class based upon existing class. The new class can inherit member of existing class in it. The new class is…