{"id":20051,"date":"2018-07-03T04:05:29","date_gmt":"2018-07-03T04:05:29","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=20051"},"modified":"2026-05-05T17:19:29","modified_gmt":"2026-05-05T11:49:29","slug":"java-use-cases","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/java-use-cases\/","title":{"rendered":"4 Most Popular Java Use Cases | Java Applications"},"content":{"rendered":"

In this Java programming tutorial, we are going to learn about the Java use cases with applications. Here, we will get to know when to use java Programming Language<\/a><\/strong> and what the use of generics is in Java.<\/p>\n

So, let’s start with Java Use Cases.<\/p>\n

\"Java<\/a>

4 Most Popular Java Use Cases | Java Applications<\/p><\/div>\n

What is the Java Programming Language?<\/h3>\n

Java is a general-purpose programming language. Java is used to create games. Minecraft is built in Java. However, Java is employed to build Android apps; most automation apps are written in Java. Moreover, even websites are engineered with Java; notable websites include LinkedIn and Google, and are mainly engineered with Java.
\nLet’s Explore the features of the Java Programming Language<\/a><\/strong><\/p>\n

Java Use Cases<\/h3>\n

To understand Java use cases, we must know about Java generics<\/strong><\/a> and where to use them.<\/p>\n

What Is Java Generic?<\/h3>\n

Generics in Java allow the programmer to work with classes, interfaces, and methods that have different data types.
\nLet’s consider an easy add method, seen below.<\/p>\n

public static int add(int a, int b)\r\n{\r\nreturn a + b;\r\n}<\/pre>\n
If we abstract out the data type<\/strong><\/a> from the method, we tend to get a new method, as seen below. Here is the type parameter, like a parameter we tend to declare for a way. Therefore, the value we pass as a parameter is the type argument, like the method argument we tend to pass.<\/p>\n
public class Main\r\npublic static < T extends number > double addStaticMethod(T a, T b)\r\npublic < T extends number > double addInstanceMethod(T a, T b)\r\npublic static void main(String[] args) {\r\nSystem.out.println(Main. < whole number > addStaticMethod(3, 4));\r\nSystem.out.println(addStaticMethod(3, 4.3));\r\nMain m = new Main();\r\nSystem.out.println(m. < Double > addInstanceMethod(3.2, 4.3));\r\n}\r\n}<\/pre>\n
Consider a data structure currently. For simplicity, let’s think about Array<\/strong><\/a>. Will we tend to create an array of any type? No, we can’t. We will create an array of integers, floats, or of any specific kind. Forget about the array implementation of any language and ask, \u201cCan we tend to abstract out the type from this data structure?”<\/p>\n
\"Java<\/a>
Java Use Cases<\/p><\/div>\n
Answer:<\/strong> Yes, we can. In Java, ArrayList is such a class that will do it. When you say List = new ArrayList<>();, it creates an array of String. However, once you pass an integer as a type argument instead of a string<\/strong><\/a>, it creates an array of integers, and so on.<\/p>\n
Let’s discuss Java Array vs ArrayList<\/a><\/strong><\/p>\n
Although, despite having said that regarding ArrayLists, we tend to are not going to get into their implementation thanks to its complexity. So, we tend to take a single box and investigate the way to build the box, a Generic box from a particular typed box.<\/p>\n
\"Java<\/a>
Java Use Cases<\/p><\/div>\n
Therefore, consider the subsequent code. Consequently, you’ll be able to put a String into a SpecilizedStringBox Object, and you’ll be able to get a string out of it.<\/p>\n
public class SpecilizedStringBox\r\n{\r\nprivate String item;\r\npublic String getItem() come item;\r\n}\r\npublic void setItem(String item)\r\n}<\/pre>\n
Now, if we tend to abstract out the information type “String” from the SpecilizedStringBox, we tend to get a generic box described by the subsequent code, which might take String, Integer, Boolean, or any data type, of course.<\/p>\n
public class GenericBox\r\n{\r\nprivate T item;\r\npublic T getItem()\r\n{\r\nreturn item;\r\n}\r\npublic void setItem(T item)\r\n}<\/pre>\n
So, using Generics is all about abstracting {the type|the sort|the kind} from a way or a class to make generic methods or classes applicable to more types than a specific type.
\nAs a result, A simple answer is to abstract out data types, allowing you to reuse code and to keep up it a lot simpler.<\/p>\n
Do you know String vs StringBuffer vs StringBuilder in Java<\/a><\/strong><\/p>\n
Where Do Generics Apply in Java?<\/h3>\n
Moreover, it looks like we will apply Generics by refactoring an existing specific typed method or a box. Till we tend to subsume data structures and primitive data types<\/strong><\/a>. However, we tend to create heaps of data types with various classes. Hence, combining the Generic Programming Paradigm with OOP makes it terribly troublesome to form an alternative of whether or not to use generics. Understanding, wherever you’ll be able to apply them, solves half the matter.
\nJava incorporated Generics in Java 5.0 to achieve:<\/p>\n