In this tutorial you will learn how to sort ArrayList of String or Integer in Java. We can easily sort an arraylist in ascending or descending order using Collections.sort() method. Below I have shared simple example for each of them. Sort ArratList in Java Example to Sort ArrayList of String Below program sorts an arraylist …
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In this tutorial you will learn how to convert or encode image to Base64 string and convert or decode Base64 string to image in Java. What is Base64? Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. …
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Abstraction involves hiding the complex features of a system and showing only the essential features, making it easier to understand by the user. Java abstraction has various advantages and disadvantages that will be covered in this article. Advantages of Abstraction in Java Increasing Understandability of the Code Abstraction is a technique that makes it easier …
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The word “Encapsulation” means that closing something like we put the main power of the tablet inside the capsule. It is a mechanism that is done to bind the data and protect it from being used by everyone. After doing encapsulation, the variables and the data of one class cannot be used in another class …
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This article will look at how to solve the above-given Class Cast Exception. This ClassCast Exception occurs at runtime when we improperly typecast an object of a class to a related class of which it is not an instance. Now, what does it mean when the exception says: cannot be cast to java.lang.Comparable. Let us …
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In this article, we will talk about the Java program for employee details using class and object. An Employee is a person or also be referred to as an entity that consists of various attributes such as – emp_id, emp_name, emp_salary, emp_department, emp_email, emp_address, and many more. We use the getter (to receive Employee details) …
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Inheritance is one of the pillars of the Java programming language. Learning OOP (Object Oriented Programming) without knowing and understanding the concept of Inheritance, its pros and cons are incomplete. Inheritance is a process in which a class acquires all the data members and its parent class methods. The basic idea behind it is that …
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How can you resolve the import org.apache error from your program? Nowadays, when developers are preparing some codes in Java, the common error is import org.apache error takes a lot of time to resolve. This is because of the minor mistake you may do while coding, and no apache library is installed on them. Apache …
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